Book a trip from Bangkok to Seattle with Cathay Pacific , fares from THB33,230

PROMOTION CODE (OPTIONAL)

Fly Cathay Pacific from Bangkok (BKK) to Seattle (SEA). Enjoy award-winning service, entertainment, and an enhanced menu for Premium Economy and Business class during your flight. Book direct to secure our best fare and join as a Cathay member to earn Status Points or Miles.

When is the best time to fly from Bangkok (BKK) to Seattle (SEA)?

Aug 2026
FromTHB39,635*
Seen 14 hours ago
Round trip/Economy
Sep 2026
FromTHB33,230*
Seen 14 hours ago
Round trip/Economy
Oct 2026
No results available
cmp-daily-histogram-bars-legend-min-price-aria-label THB39.6K
cmp-daily-histogram-bars-legend-max-price-aria-label THB47.7K
Displaying fares for August-2026
  • BKK–SEA: cmp-view-offers-disclaimer. Find offers
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    AUG

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  • BKK–SEA, 14/08/2026 – 19/09/2026: From THB47,685
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  • BKK–SEA, 15/08/2026 – 19/09/2026: From THB44,135
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  • BKK–SEA, 16/08/2026 – 19/09/2026: From THB47,685
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  • BKK–SEA, 17/08/2026 – 19/09/2026: From THB47,685
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  • BKK–SEA, 18/08/2026 – 19/09/2026: From THB47,685
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  • BKK–SEA, 19/08/2026 – 19/09/2026: From THB44,135
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  • BKK–SEA, 20/08/2026 – 19/09/2026: From THB39,635
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  • BKK–SEA, 21/08/2026 – 19/09/2026: From THB42,435
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  • BKK–SEA, 22/08/2026 – 19/09/2026: From THB42,435
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  • BKK–SEA, 23/08/2026 – 19/09/2026: From THB47,685
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  • BKK–SEA, 24/08/2026 – 19/09/2026: From THB44,135
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  • BKK–SEA, 25/08/2026 – 19/09/2026: From THB42,435
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  • BKK–SEA, 26/08/2026 – 19/09/2026: From THB42,435
    26

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  • BKK–SEA, 27/08/2026 – 19/09/2026: From THB39,635
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    SEP

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    • RangeTHB39,635-THB47,685

    Lowest fares on flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Travel Destination Facts

    Destination airport(s)

    • Boeing Field (BFI)
    • Kenmore Air Harbor Seaplane Base (LKE)
    • Seattle/Tacoma International Airport (SEA)
    • Paine Field Airport (PAE)

    Aircraft types

    Boeing 777, Airbus A321neo, Airbus A330 and Airbus A350 aircraft*

    Cabin class

    First class, Business class, Premium Economy, Economy^

    Lowest fare month

    March

    *Aircraft model may vary due to operational requirements. ^Cabin class availability is subject to aircraft configuration.

    Lowest fare month for flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Explore flight fares from Bangkok (BKK) to Seattle (SEA)

    Make flexible bookings with Cathay Pacific and enjoy hassle-free travel when plans change.

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    Explore flight fares from Bangkok (BKK) to Seattle (SEA)
    From
    To
    Fare Type
    Dates
    Price
    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		16/09/2026 - 26/09/2026

    From

    THB33,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
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    Economy    		22/09/2026 - 26/09/2026

    From

    THB33,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		15/09/2026 - 26/09/2026

    From

    THB33,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		23/09/2026 - 26/09/2026

    From

    THB33,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		21/09/2026 - 26/09/2026

    From

    THB35,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		20/09/2026 - 26/09/2026

    From

    THB35,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		19/09/2026 - 26/09/2026

    From

    THB35,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		18/09/2026 - 26/09/2026

    From

    THB35,230

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		17/09/2026 - 26/09/2026

    From

    THB39,635

    Seen 14 hours ago

    Bangkok (BKK)Seattle (SEA)Round-trip
    /
    Economy    		20/08/2026 - 19/09/2026

    From

    THB39,635

    Seen 14 hours ago

    Lowest fares on round-trip flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Book Business Class flights to Seattle - selected offers

    Experience refined comfort in our award-winning Business class.

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    Lowest fares on flights found by other customers on Cathay Pacific’s official website in the last 48 hours. All fares are subject to change at any time. Other Cathay Pacific Terms & Conditions apply.

    Flights from Bangkok BKK to Seattle SEA

    Seattle is the Pacific Northwest’s hub of innovation, culture and business. It’s also surrounded by an abundance of natural beauty including evergreen trees and spectacular mountain views.

    Best of Seattle

    Eat your way through the iconic Pike Place Market. Stroll through Post Alley and stop by the Gum Wall (or even add your own). Venture towards the Seattle Waterfront and take a ride on the Seattle Great Wheel or visit the Seattle Aquarium. Catch the Bainbridge Island Ferry and experience scenic city views from the sea. Take in the gorgeous views at the Space Needle. Explore Seattle’s largest park, Discovery Park. Lunch in vibrant Capitol Hill and grab a coffee at Starbucks Reserve Roastery.

    Seattle travel tips

    Seattle is quite easy to get around. From the various public transport options including the Link Light Rail, King County Metro Transit, Seattle Streetcars, Seattle Center Monorail to the many neighbourhoods made for walking.

    All fares displayed include taxes and carrier-imposed surcharges. All fares, government taxes and fees, and surcharges are subject to change at any time. For ticket cancellations, where applicable, the Hong Kong Passenger Security Charge, the Hong Kong Air Passenger Departure Tax, and the Hong Kong International Airport Construction Fee will be refunded without any administration fees.