Seattle, WA SEA to Shanghai SHA flight with British Airways

United Airlines, established in 1926, is a major U.S. airline headquartered in Chicago, Illinois. Operating an extensive domestic and international network, United serves more destinations than any other airline, connecting travelers across six continents. The airline's eight hubs include Chicago–O'Hare, Denver, Houston–Intercontinental, Los Angeles, Newark, San Francisco, Washington–Dulles, and Guam. As a founding member of the Star Alliance, United offers a comprehensive range of services, including regional flights through United Express, catering to both leisure and business travelers. The airline is committed to sustainability, investing in sustainable aviation fuel and innovative technologies to reduce its environmental impact.

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.

Qatar Airways is the national airline of Qatar, headquartered in Doha and based at Hamad International Airport. Established in 1993 and re-launched in 1997, it has grown into one of the Middle East's largest network airlines, operating an extensive network of international services across Europe, the Middle East, Africa, Asia Pacific, and the Americas. The airline offers passenger and air cargo transportation, along with services like corporate travel, online check-in, and in-flight entertainment. Qatar Airways is a member of the Oneworld alliance and operates a modern fleet of over 200 aircraft. It has received numerous accolades, including "World's Best Airline" multiple times.

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.

All Nippon Airways (ANA) is Japan's largest airline, operating an extensive network of domestic and international flights. Established in 1952, ANA has grown to become a leading member of the Star Alliance, offering high-quality air transportation services. The airline's fleet includes a variety of aircraft, such as the Boeing 787-9 and Airbus A320neo, catering to both short and long-haul routes. ANA's main hubs are Tokyo–Haneda and Tokyo–Narita airports, with secondary hubs in Osaka–Itami and Osaka–Kansai. The airline is committed to providing exceptional service, ensuring a comfortable and reliable travel experience for its passengers.

Air China is the flag carrier and one of the largest airlines of the People's Republic of China, headquartered in Beijing. Established in 1988, it was formed from a split of the Civil Aviation Administration of China (CAAC) and was given primary responsibility for intercontinental flights. Air China operates an extensive network of domestic and international flights to destinations across Asia, North America, Europe, South America, Africa, and Australia. The airline's fleet consists of various Boeing and Airbus aircraft. Air China is a member of the Star Alliance.