Zurich to Baden-Baden train with Deutsche Bahn (ICE,IC,EC,RE)

Wed 26 Nov
+ Add return
Deutsche Bahn
ÖBB | ICE
ÖBB | Euro City (EC)
ÖBB | InterCity
ÖBB Nightjet
1,000+ travel companies
Deutsche Bahn
ÖBB | ICE
ÖBB | Euro City (EC)
ÖBB | InterCity
ÖBB Nightjet
1,000+ travel companies
QR-Code
Scan to get our free app
Use our app to get live travel updates and book mobile tickets for trains, buses, flights, and ferries.
App Store
rate4.9
42K ratings
Google Play
rate4.6
136K reviews

The cheapest and fastest trains from Zurich to Baden-Baden

Showing times and prices for 27 Nov

Cheapest price

£33

Average price

£42

Fastest journey

2 h 42 m

Average duration

3 h 28 m

Trains per day

4

Distance

157 km

Cheap tickets

The best way to find a cheap train ticket from Zurich to Baden-Baden is to book your journey as far in advance as possible and to avoid travelling at rush hour.

The average ticket from Zurich to Baden-Baden will cost around £42 if you buy it on the day, but you can find cheap train tickets today for only £33.

Fast trains

Of the 4 trains that leave Zurich for Baden-Baden every day 4 travel direct so it’s quite easy to avoid journeys where you’ll have to change along the way.

These direct trains cover the 157 km distance in an average of 3 h 28 m but if you time it right, some trains will get you there in just 2 h 42 m .

The slowest trains will take 3 h 50 m and usually involve a change or two along the way, but you might be able to save a few pennies if you’re on a budget.

Deutsche Bahn
06:373h50
Zurich
10:27Baden-Baden
£331One-way
0 changes
Deutsche Bahn
17:593h28
Zurich
21:27Baden-Baden
£431One-way
0 changes
Deutsche Bahn
09:082h42
Zurich
11:50Baden-Baden
£461One-way
0 changes
Deutsche Bahn
04:373h50
Zurich
08:27Baden-Baden
£471One-way
0 changes

Travel Information

Compare train and coach for Zurich to Baden-Baden

Omio recommends booking the train as it is the most popular option from Zurich to Baden-Baden among Omio's users. If you are prioritising price take the coach with prices starting from £14. For those with little time consider booking a train which can get you there in 2h 44m. In case you are seeking to minimise your carbon footprint the train is your best bet as it emits only 0.0 - 0.1kg. The ticket price range depends on the travel mode: a coach costs an average of £14, and a train costs an average of £20.

Distance: 157 km

Compare train with

Most popular
Train
Coach

£42

Average Price

£26

Average Price

Cheapest

3h 14m

Average total duration

Fastest

2h 44m

Onboard

+

30m

Additional time*

3h 22m

Average total duration

2h 52m

Onboard

+

30m

Additional time*

0.0 - 0.1kg

CO2 emissions

Lowest

0.2 - 0.4kg

CO2 emissions

Deutsche Bahn

Most popular train company

BlaBlaCar

Most popular bus company

Direct Options

Direct Options

Additional time: Average total travel duration to departure point, security checks and transfers.

Live departures

Zurich to Baden-Baden train times

The table below shows live departures for Zurich to Baden-Baden trains for today, Wednesday 26 November. You can also manually refresh the results below to see updated train journeys.

Last updated at 03:48
ProviderDepartsDurationArrivesChanges
Tickets
deutsche_bahnICE 76
On time
06:59 Zurich HB
2h32
09:31 Baden-Baden station
0 changesdirect
obb_intercityIC 764+obb_intercity_expressICE 370+obbRE 207:59 Zurich HB
3h28
11:27 Baden-Baden station2 changes
deutsche_bahnIC 764 · ICE 370 · RE 4718
On time
07:59 Zurich HB
3h28
11:27 Baden-Baden station
2 changes
obb_intercity_expressICE 74
On time
08:59 Zurich HB
2h32
11:31 Baden-Baden station
0 changesdirect
deutsche_bahnICE 74
On time
08:59 Zurich HB
2h32
11:31 Baden-Baden station
0 changesdirect
deutsche_bahnEC 8
On time
09:59 Zurich HB
2h51
12:50 Baden-Baden station
0 changesdirect
obb_eurocityEC 8
On time
09:59 Zurich HB
2h51
12:50 Baden-Baden station
0 changesdirect
obbIR 2264+obb_eurocityEC 8
On time
10:08 Zurich HB
2h42
12:50 Baden-Baden station
1 change
deutsche_bahnIR 2264 · EC 8
On time
10:08 Zurich HB
2h42
12:50 Baden-Baden station
1 change
deutsche_bahnIC 770 · ICE 72
On time
10:59 Zurich HB
2h32
13:31 Baden-Baden station
1 change
obb_intercityIC 770+obb_intercity_expressICE 72
On time
10:59 Zurich HB
2h32
13:31 Baden-Baden station
1 change
obb_intercityIC 772+obb_intercity_expressICE 276+obbRE 711:59 Zurich HB
3h01
15:00 Baden-Baden station2 changes
deutsche_bahnIC 772 · ICE 276 · RE 17020
On time
11:59 Zurich HB
3h01
15:00 Baden-Baden station
2 changes
obb_intercity_expressICE 70
On time
12:59 Zurich HB
2h32
15:31 Baden-Baden station
0 changesdirect
deutsche_bahnICE 70
On time
12:59 Zurich HB
2h32
15:31 Baden-Baden station
0 changesdirect
deutsche_bahnEC 150 · RE 17023
On time
13:34 Zurich HB
3h24
16:58 Baden-Baden station
1 change
obb_intercityIC 776+obb_intercity_expressICE 274+obbRE 713:59 Zurich HB
3h01
17:00 Baden-Baden station2 changes
deutsche_bahnIC 776 · ICE 274 · RE 17024
On time
13:59 Zurich HB
3h01
17:00 Baden-Baden station
2 changes
deutsche_bahnIC 778 · ICE 376
On time
14:59 Zurich HB
2h33
17:32 Baden-Baden station
1 change
obb_intercityIC 778+obb_intercity_expressICE 376
On time
14:59 Zurich HB
2h33
17:32 Baden-Baden station
1 change
obb_intercity_expressICE 272+obbRE 2
On time
15:59 Zurich HB
3h28
19:27 Baden-Baden station
1 change
deutsche_bahnICE 272 · RE 4736
On time
15:59 Zurich HB
3h28
19:27 Baden-Baden station
1 change
obbIR 2276 · RE 716:08 Zurich HB
3h51
19:59 Baden-Baden station1 change
deutsche_bahnIR 2276 · RE 5336
On time
16:08 Zurich HB
3h51
19:59 Baden-Baden station
1 change
obb_intercity_expressICE 417:59 Zurich HB
2h44
20:43 Baden-Baden station0 changesdirect
obb_intercityIC 6047019:59 Zurich HB
2h53
22:52 Baden-Baden station0 changesdirect

This is the last train of the day.

Find all the dates and times for this journey

Compare prices and tickets Zurich to Baden-Baden by train or coach

Compare train and coach prices over the next three weeks. See the best deals at a glance, find the lowest fares, and choose the option that fits your budget.

Thu
27 Nov
Fri
28 Nov
Sat
29 Nov
Sun
30 Nov
Mon
01 Dec
Tue
02 Dec
Wed
03 Dec

Journey information

Overview: Train from Zurich to Baden-Baden

SwitzerlandSwitzerland
GermanyGermany
Icon of train

Trains from Zurich to Baden-Baden run on average 13 times per day, taking around 2h 44m. Cheap train tickets for this journey start at £20 but you can travel from only £14 by coach.

There are 5 trains per day. The earliest train runs at 00:05, the last at 23:56. The fastest train covers the 157 km distance in 2h 30m.

Fares are the lowest economy prices found on Omio. Early booking often means lower prices. Prices change daily and are subject to availability. Discount cards, coach trips, and booking fees are not included.
Price information
Cheapest alternative travel mode
Coach from £14
Distance
157 km
Average train duration
2h 44m
Cheapest ticket price
£20
Trains per day
13
Direct trains
5
Fastest train
2h 30m
First train
00:05
Last train
23:56
Fares are the lowest economy prices found on Omio. Early booking often means lower prices. Prices change daily and are subject to availability. Discount cards, coach trips, and booking fees are not included.
Price information
Cheapest alternative travel mode
Coach from £14

Train companies: Deutsche Bahn, ÖBB | ICE, ÖBB | Euro City (EC), ÖBB | InterCity, ÖBB Nightjet, Swiss Railways (SBB/CFF/FFS) from Zurich to Baden-Baden trainsDeutsche Bahn, ÖBB | ICE, ÖBB | Euro City (EC), ÖBB | InterCity, ÖBB Nightjet, Swiss Railways (SBB/CFF/FFS) trains will get you between Zurich and Baden-Baden from £14. With over 1000 travel companies on Omio, you can find the best train times and tickets for your trip.

Deutsche Bahn

About
Deutsche Bahn (DB) is Germany’s main train operator, running around 40,000 domestic and international services each day. Its fleet includes a variety of train types: high-speed ICE (Intercity Express) trains, reaching up to 300 km/h; IC (Intercity) and EC (EuroCity) trains for long-distance travel; and IRE (Interregio-Express), RE (Regional Express), and RB (Regionalbahn) services for regional and local connections. While bathrooms are standard on all trains, amenities such as onboard restaurants and free Wi-Fi are available only on certain train types and routes. DB offers a wide range of fares, including Super Saver, Saver, and Flexible tickets, along with discount cards like the BahnCard 25, 50, and 100. Additional options include single tickets, day tickets, and group tickets. Popular routes include Berlin–Munich, Hamburg–Frankfurt, Cologne–Stuttgart, Berlin–Dresden, and Hamburg–Cologne, as well as numerous regional services across Germany.
Luggage & cancellation policy
Average Duration
2h 30m
Cheapest Price
£20
Deutsche Bahn frequency
8 a day
Luggage included
Passengers are allowed to bring hand luggage and one additional larger item free of charge, provided they can carry it themselves
Luggage storage
Luggage can be stored in overhead racks, under the seat, or in designated luggage areas near the doors or in the middle of the carriage.
Cancellation Policy
Tickets can be canceled based on their fare conditions as mentioned in what type of train tickets are refundable?
Refund
If DB cancels a train, passengers are entitled to a full refund of the ticket price.
Amenities on board the train
Wifi
Food sold onboard
Most ICE and many IC/EC trains have:
A Bordrestaurant (restaurant car) where you can sit and eat.
A Bordbistro (bistro bar) with snacks, hot meals, and drinks to-go.
At-seat service in 1st class: staff will take your order and serve food/drinks directly to your seat.
Regional trains (RE / RB / S-Bahn):
No onboard catering.
You’re welcome to bring your own food and drinks.
Seat reservation
Second Class:
Not included by default.
You can add a seat reservation when booking (recommended for busy routes).
Costs around €4.90 per seat (or €5.90 if booked separately later).
First Class:
Yes, always included in the ticket price.
Toilets
USB plugs
Accessibility
DB trains are equipped with facilities for passengers with reduced mobility, including wheelchair spaces, accessible restrooms, and assistance services.
Pets
Small pets (e.g. cats, small dogs, etc.):
Allowed for free if they can fit in a transport box (max. size: hand luggage).
Must stay in the box for the entire journey.
Large dogs:
Require a separate (paid) ticket — typically half the price of a regular second-class ticket.
Must be leashed and wear a muzzle while on the train.
Cannot sit on seats.
Assistance dogs:
Travel free of charge.
Do not need a muzzle or leash if medically not required.
Allowed to accompany the passenger at all times.
Quiet zone

ÖBB | ICE

About
The ÖBB ICE is a high-speed train service operated by the Austrian Federal Railways (ÖBB). It is one of the most popular train services in Austria, offering fast and comfortable journeys between major cities. The ICE trains are modern and well-equipped, with comfortable seating, air-conditioning, and power sockets. There are three types of ICE trains: ICE T, ICE S, and ICE Sprinter. The ICE T is the fastest, with speeds of up to 230 km/h, while the ICE S and ICE Sprinter offer slightly slower speeds. The ÖBB ICE offers a range of ticket types, including single tickets, return tickets, and group tickets. Onboard facilities include a restaurant car, free Wi-Fi, and a range of entertainment options. The most popular routes for the ÖBB ICE include Vienna to Salzburg, Vienna to Innsbruck, and Vienna to Graz. These routes offer stunning views of the Austrian countryside and provide a convenient way to travel between major cities.
Luggage & cancellation policy
Average Duration
2h 32m
Cheapest Price
£92
ÖBB | ICE frequency
4 a day
Luggage included
2 pieces of hand luggage and 1 piece of larger luggage free of charge
Luggage storage
Overhead racks, under seats, and designated storage areas at ends of carriages
Cancellation Policy
Cancellation possible according to ticket conditions
Refund
Full refund if train is cancelled by ÖBB
Amenities on board the train
Wifi
Food sold onboard
Restaurant car with hot meals and drinks, bistro service with snacks and beverages, at-seat service in First Class
Seat reservation
First Class: Included in ticket price. Second Class: Optional reservation for €3
Toilets
USB plugs
Accessibility
Wheelchair spaces, accessible toilets, and boarding assistance available
Pets
Small pets in carriers travel free. Large dogs need ticket (50% of regular fare). Guide dogs free
Quiet zone

ÖBB | Euro City (EC)

About
The ÖBB Euro City is a high-speed train service operated by the Austrian Federal Railways (ÖBB). It is one of the most popular train services in Austria, connecting major cities across the country. The Euro City trains are modern and comfortable, with air-conditioned coaches and plenty of legroom. There are two types of Euro City trains: the EC (Euro City) and the IC (InterCity). The EC trains are the fastest, with speeds of up to 200 km/h, while the IC trains are slightly slower, with speeds of up to 160 km/h. The ÖBB Euro City offers a variety of ticket types, including single tickets, return tickets, and group tickets. Onboard facilities include free Wi-Fi, power sockets, and a restaurant car. The most popular routes for the ÖBB Euro City include Vienna to Salzburg, Vienna to Innsbruck, and Vienna to Graz. These routes offer stunning views of the Austrian countryside and provide a convenient way to travel between major cities.
Luggage & cancellation policy
Average Duration
2h 51m
Cheapest Price
£86
ÖBB | Euro City (EC) frequency
2 a day
Luggage included
2 pieces of hand luggage and 1 piece of larger luggage included
Luggage storage
Overhead racks, under seats, and designated luggage areas at carriage ends
Cancellation Policy
Cancellation possible according to ticket conditions
Refund
Full refund provided for canceled trains
Amenities on board the train
Wifi
Food sold onboard
Restaurant car or bistro available on most routes serving hot and cold meals, snacks, and beverages
Seat reservation
Seat reservations optional in 2nd class for additional fee, included in 1st class tickets
Toilets
USB plugs
Accessibility
Wheelchair spaces, accessible toilets, and boarding assistance available
Pets
Small pets in carriers travel free. Large dogs require ticket (50% of 2nd class fare). Guide dogs free.
Quiet zone

ÖBB | InterCity

About
ÖBB Intercity is a domestic high-speed rail service operated by the Austrian Federal Railways (ÖBB) in Austria. They are addition to the Eurocity and the Railjet for long-distance travels and also include first class cars, the trains are air-conditioned, hve power sockets a minibar service and are comfortable. ÖBB Intercity trains mostly run on the inner alpine lines to cities like Graz, Linz and Salzburg and Inssbruck.
Luggage & cancellation policy
ÖBB | InterCity frequency
3 a day
Luggage included
2 pieces of hand luggage and 1 piece of larger luggage
Luggage storage
Overhead racks, under seats, and designated storage areas at ends of carriages
Cancellation Policy
Cancellation possible according to ticket type conditions
Refund
Full refund if train is cancelled by ÖBB
Amenities on board the train
Wifi
Food sold onboard
Restaurant car (on most routes) and at-seat service in first class. Snacks and drinks available
Seat reservation
Optional seat reservation for €3 in second class, included in first class ticket price
Toilets
USB plugs
Accessibility
Wheelchair spaces, accessible toilets, and boarding assistance available
Pets
Small pets in carriers travel free. Large dogs need ticket (50% of regular fare). Guide dogs free
Quiet zone

ÖBB Nightjet

About
ÖBB Nightjet is an Austrian train company that offers overnight services across Europe. It has a range of train types, including the EuroNight, CityNightLine and Nightjet, which all offer comfortable sleeping compartments and couchettes. The EuroNight is the most luxurious option, with private compartments and a restaurant car. The CityNightLine is a more affordable option, with compartments and couchettes, while the Nightjet is the most basic option, with couchettes and reclining seats. Ticket types include Economy, Comfort and Business, with the latter offering the most luxurious experience. Onboard facilities include Wi-Fi, power sockets, a restaurant car and a bar. The most popular routes for ÖBB Nightjet are from Vienna to Munich, Berlin, Zurich, Amsterdam, Prague and Budapest.
Luggage & cancellation policy
Average Duration
3h 1m
Cheapest Price
£134
ÖBB Nightjet frequency
1 a day
Luggage included
2 pieces of hand luggage and 1 piece of larger luggage included
Luggage storage
Luggage racks above seats, at end of carriages, and under seats. Special storage for bikes and ski equipment.
Cancellation Policy
Cancellation possible according to ticket type conditions
Refund
Full refund if train cancelled by ÖBB
Amenities on board the train
Wifi
Food sold onboard
Restaurant car or bistro available on most routes. Night trains offer breakfast service in sleeper and couchette cars.
Seat reservation
Seat reservations recommended but not mandatory. Additional fee applies. Free for certain ticket types and first class.
Toilets
USB plugs
Accessibility
Wheelchair spaces, accessible toilets, boarding assistance available with advance notice
Pets
Small pets in carriers travel free. Larger dogs need ticket (50% of 2nd class fare) and muzzle. Guide dogs free.
Quiet zone

Swiss Railways (SBB/CFF/FFS)

Luggage & cancellation policy
Average Duration
3h 50m
Cheapest Price
£59
Swiss Railways (SBB/CFF/FFS) frequency
10 a day

FAQs: Zurich to Baden-Baden train

Find answers to the most common questions about traveling from Zurich to Baden-Baden by train. From journey times and ticket prices to direct connections, first and last departures, and even whether the route is scenic, our FAQs cover everything you need to plan your trip. Whether you’re looking for the fastest train, the cheapest option, or tips for making the most of your visit at Baden-Baden, this guide helps you travel smarter and with confidence.

FAQs
The train distance from Zurich to Baden-Baden is 157 km.
To fully enjoy Baden-Baden's thermal spas, cultural sites, and natural beauty, a stay of 2 to 3 days is recommended.
Yes, the train journey from Zurich to Baden-Baden is considered scenic, passing through picturesque landscapes, including the beautiful Rhine Valley, charming villages, and lush greenery, offering travellers a visually enjoyable experience.
The train journey from Zurich to Baden-Baden covers a distance of 157 km and takes approximately 2h 30m. Trains run 13 per day.
The first train from Zurich to Baden-Baden leaves at 0:05.
Booking trains from Zurich to Baden-Baden in advance is advisable, especially during peak travel seasons or for long journeys, to ensure availability and secure better fares.
The last train from Zurich to Baden-Baden departs at 23:56.
A day trip from Zurich to Baden-Baden is not feasible as the journey takes 2h 30m each way. However, there are 13 train trips per day. The distance between the two cities is 157 km.
The cost of a train ticket from Zurich to Baden-Baden can vary. The cheapest tickets are usually available from £20, while the average price tends to be around £42.
Trains from Zurich to Baden-Baden run approximately 13 times per day.
Yes, there is a direct train between Zurich and Baden-Baden. The service operates 5 times per day, provided by Deutsche Bahn, ÖBB | ICE, ÖBB | Euro City (EC), ÖBB | InterCity, ÖBB Nightjet.
The cheapest way to get from Zurich to Baden-Baden is by coach, costing approximately £14.
Yes, there is a night train from Zurich to Baden-Baden.
To get from Zurich to Baden-Baden, you can choose from several travel options including train and coach.
The train station in Zurich that goes to Baden-Baden is Zurich HB, and it arrives at Baden-Baden station.
Yes, you can take the train from Zurich to Baden-Baden.

popular train stations

Important Stations and Airports in Zurich and Baden-Baden

Zurich
Baden-Baden
The major train station for departures in Zurich is Zürich Stadelhofen. Find all the information you need to know about services, amenities and connections at Zürich Stadelhofen for your trip from Zurich to Baden-Baden.
Zürich StadelhofenWifiLockersParkingDiningATMTaxisAccessibilityWCHotelLost and Found OfficeTicket OfficeBike ParkingBike RentalCar RentalInformation DeskLuggage Carts
Amenities at train station
WifiWifi
LockersLockers
ParkingParking
DiningDining
ATMATM
TaxisTaxis
AccessibilityAccessibility
WCWC
HotelHotel
Lost and Found OfficeLost and Found Office
Ticket OfficeTicket Office
Bike ParkingBike Parking
Bike RentalBike Rental
Car RentalCar Rental
Information DeskInformation Desk
Luggage CartsLuggage Carts
information
phone
Phone Number
ticketOfficeHours
Ticket Office Hours
  • 6:00 AM - 10:00 PM Monday - Sunday
platformCount
Number of platforms
3
Wifi
Wifi
  • Free
Parking
Parking
  • The car park is open 7 days a week. Access is available from Mühlebachstrasse.
Dining
Dining
  • Outback Lodge
  • Tibits
Taxis
Taxis
  • Outside the main entrance.
Accessibility
Accessibility
  • Ramps, restrooms.
WC
WC
  • CHF 2
Hotel
Hotel
  • Hotel Opera Zurich
  • Small Luxury Hotel Ambassador Zurich
  • Hotel Seehof
Lost and Found Office
Lost and Found Office
  • Located in the main hall
Bike Parking
Bike Parking
  • 1000 places, covered
Car Rental
Car Rental
  • Europcar
  • Hertz
Information Desk
Information Desk
  • Located in the main hall
Luggage Carts
Luggage Carts
  • Free
Station Plan
  • Hall 1: main entrance, platform 1-3 for S-Bahn trains
  • Hall 2: platform 4 for regional trains
Public transport options for Zürich Stadelhofen
  • Tram: Line 11, Line 15
  • Bus: Several lines available
  • S-Bahn: Lines S3, S5, S6, S7, S9, S12, S16
Zürich, Oerlikon Bahnhof NordAccessibility
Amenities at train station
AccessibilityAccessibility
information
phone
Phone Number
ticketOfficeHours
Distance to city center
5 km
Amenities at train station
WifiWifi
LockersLockers
ParkingParking
DiningDining
ATMATM
TaxisTaxis
AccessibilityAccessibility
WCWC
HotelHotel
ShowerShower
LoungeLounge
Lost and Found OfficeLost and Found Office
Ticket OfficeTicket Office
Bike ParkingBike Parking
Bike RentalBike Rental
Car RentalCar Rental
Information DeskInformation Desk
Luggage CartsLuggage Carts
information
phone
Phone Number
ticketOfficeHours
Ticket Office Hours
  • 6:00 AM - 10:00 PM Monday - Sunday
ticketOfficeHours
Distance to city center
1 km
platformCount
Number of platforms
26
Wifi
Wifi
  • Free
Parking
Parking
  • The car park is open 24/7. Access via Gessnerallee and Sihlquai.
Dining
Dining
  • Restaurant Au Premier
  • Brasserie Federal
Taxis
Taxis
  • Outside the main entrance.
Accessibility
Accessibility
  • Elevators, ramps, restrooms.
WC
WC
  • CHF 2
Hotel
Hotel
  • Hotel Schweizerhof Zürich
  • Hotel St. Gotthard
  • Central Plaza Hotel
Shower
Shower
  • Cost CHF 12
Lounge
Lounge
  • Located in the main hall
Lost and Found Office
Lost and Found Office
  • Located in the main hall
Bike Parking
Bike Parking
  • 1,300 places, mostly covered
Car Rental
Car Rental
  • Avis
  • Europcar
  • Hertz
Information Desk
Information Desk
  • Located in the main hall
Luggage Carts
Luggage Carts
  • Free
Station Plan
  • Hall 1: main entrance, platforms 3-18 for long-distance trains
  • Hall 2: S-Bahn platforms 21-24
  • Hall 3: underground S-Bahn platforms 41-44
Public transport options for Zürich HB
  • Tram: Lines 3, 4, 6, 7, 10, 13, 14
  • Bus: Several lines available
  • S-Bahn: Lines S2, S3, S5, S6, S7, S8, S9, S11, S12, S15, S16, S24

More options for your journey from Zurich to Baden-Baden

Here are some other resources that might have the information you need

The Omio App Makes Travel Planning Easy

We’ll get you where you want to go. From live train updates to mobile tickets, our innovative app is the ideal way to plan and keep track of your travel.

ios-badge
android-badge
Hand With Phone