San Francisco, CA SFO to London LON flight with United

British Airways (BA) is the United Kingdom’s flag carrier airline with headquarters in London near its main hub at London Heathrow Airport (LHR). BA is the second largest UK-based airline in terms of fleet size and number of passengers carried. Known as a full-service global airline, British Airways offers year-round low fares to destinations worldwide and flies to and from centrally-located airports. Its extensive global route network includes more than 170 destinations in nearly 80 countries throughout Europe, North America, South America, Asia, Africa and Australia. syn p British Airways (BA) is the flag carrier airline of the United Kingdom with its headquarters in London near its main hub at London Heathrow Airport (LHR). Known as a full-service global airline, BA offers low fares year-round to destinations around the globe and flies to and from centrally-located airports. Its extensive global route network includes more than 170 destinations in nearly 80 countries throughout Europe, North America, South America, Asia, Africa and Australia. BA is also the second largest airline based in the UK in terms of its fleet size and number of passengers carried.

SAS, or Scandinavian Airlines, is the national airline of Denmark, Norway, and Sweden, headquartered in Solna, Sweden. Founded in 1946, it emerged from a merger of the three countries' national carriers to handle transatlantic operations. SAS operates extensive regional services within Scandinavia and Europe, as well as international flights to Asia and North America, with primary hubs in Copenhagen, Stockholm, and Oslo. As of July 2024, SAS, including its subsidiaries SAS Link and SAS Connect, operates a fleet of 133 aircraft to 130 destinations. SAS joined SkyTeam on September 1, 2024, after leaving Star Alliance.

Turkish Airlines is the national flag carrier of Turkey and one of the world’s leading airlines, flying to more international destinations than any other airline. Based in Istanbul, it connects travelers to Europe, Asia, the Americas, Africa, and beyond. Passengers can choose from Economy Class with comfortable seating, WiFi, and in-flight entertainment, or upgrade to Business Class for spacious seating, gourmet dining, and lounge access. With its award-winning service and global reach, Turkish Airlines is a top choice for both business and leisure travel.

TAP Air Portugal is the national flag carrier and the largest airline in Portugal, with its main hub at Humberto Delgado Airport in Lisbon. As a member of the Star Alliance, TAP operates an average of 2,500 flights per week to more than 90 destinations in over 30 countries. Many of its aircraft feature USB outlets for charging devices, while most long-haul flights include complimentary onboard entertainment with movies, TV shows, music, and games. For travelers looking for affordable options, TAP also offers low-cost fares on select routes, making it easy to find cheap flights with the airline.

Aer Lingus is Ireland's national airline, established in 1936. It operates over 100 routes, connecting Europe and North America from its main hub at Dublin Airport, as well as from Cork, Shannon, and Knock. A member of the International Airlines Group (IAG), Aer Lingus is recognized as a 4-star airline by Skytrax. The airline is known for its Irish hospitality and offers a range of services, including its AerClub loyalty program. Aer Lingus utilizes a modern fleet of Airbus aircraft, including the A321neoLR, for efficiency, comfort, and safety.

Air Canada is Canada's largest airline and flag carrier, headquartered in Saint-Laurent, Quebec. Founded in 1937 as Trans-Canada Air Lines, it was renamed Air Canada in 1964 and fully privatized in 1989. As a founding member of Star Alliance, Air Canada provides scheduled passenger and cargo services to over 220 destinations across six continents. The airline operates a diverse fleet, including Airbus A320 family aircraft, Boeing 737 MAX, Boeing 777, and Boeing 787 Dreamliner for both short and long-haul routes. Air Canada also offers leisure travel packages through its subsidiary, Air Canada Vacations.