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What Are The Longest Routes Serving Seattle Tacoma International Airport This Year?

by Staff

Seattle–Tacoma International (SEA) is one of the busiest airports on the US West Coast and a key hub for air travel into and out of the state of Washington. While it is known for being a hub for US carriers Alaska Airlines and Delta Air Lines, certain foreign carriers operate some incredibly long flights from Sea-Tac.

Top of the pile

According to scheduling data made available by Cirium, an aviation analytics company, Star Alliance member Singapore Airlines operates the longest scheduled route from Seattle–Tacoma International Airport in 2024. Naturally, this corridor links the Pacific Northwest with its own hub at Singapore Changi Airport (SIN).

Data from GCMap shows that this route is a whopping 8,070 miles in length, equivalent to 12,987 kilometers or 7,013 nautical miles. Singapore Airlines is scheduled to operate this flight 188 times this year, averaging out at once every two days, using 253-seat Airbus A350-900 widebodies to do the job.

Photo: Markus Mainka | Shutterstock

A quick look at tracking data from Flightradar24 tells us that the flight, numbered SQ27, is scheduled to leave Seattle at 08:45 local time and arrive in Singapore at 17:40 the following day. This gives it a planned block time of 16 hours and 55 minutes, with this year’s rotations this far having spent between 15 hours and 24 minutes and 17 hours and 20 minutes in the air.

A close Middle Eastern pair

The second and third-longest routes serving Seattle-Tacoma International Airport this year go to a pair of Middle Eastern hubs, with very little to separate between their two distances. Indeed, the UAE’s Dubai International Airport (DXB) is 7,425 miles (11,949 km / 6,452 NM) away, while the distance to Doha Hamad International Airport in Qatar is 7,411 miles (11,927 km / 6,440 NM).


The 5 Biggest Airlines For Flights From Seattle

Over thirty airlines operate out of Seattle-Tacoma International Airport.

An Emirates Boeing 777-300ER flying in the sky.

Photo: Markus Mainka | Shutterstock

Much like the route from Seattle-Tacoma International to Singapore Changi Airport, these corridors are also both served by a flag carrier airline from the destination country. Emirates does the honors for Dubai International, with 344 flights scheduled this year using 354-seat Boeing 777-300ER aircraft. Numbered as flight EK230, the scheduled duration on this corridor is 14 hours and 35 minutes.

As it happens, oneworld member Qatar Airways also uses the Boeing 777-300ER on flights from Seattle-Tacoma International to its Doha hub. Funnily enough, these planes have 354 seats onboard as well, albeit in a two-class configuration compared to Emirates’ three. Qatar Airways is scheduled to operate flight QR720 daily this year, with a planned block time of 14 hours and 30 minutes.

Rounding out the top five

Curiously, the difference between fourth and fifth place is even closer, with just three miles separating the routes from Seattle to Taipei (TPE) and Istanbul (IST). The former of these is 6,074 miles (9,775 km / 5,278 NM) long and served by Delta Air Lines (coming soon) and EVA Air, while the latter is 6,071 miles (9,770 km / 5,276 NM) in length and plied solely by flag carrier and Star Alliance member Turkish Airlines.

What do you make of Seattle-Tacoma International Airport’s longest routes this year? How many have you flown on? Let us know your thoughts and experiences in the comments!

  • New Seattle-Tacoma International SkyBridge Taken From the Air

    Seattle-Tacoma International Airport

    IATA/ICAO Code:

    United States

    Lance Lyttle

    Passenger Count :
    20,061,507 (2020)

    Runways :
    16L/34R – 3,627m (11,901ft) |16C/34C – 2,873m (9,426ft) |16R/34L – 2,591m (8,500ft)

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