A large indoor space with a golden pagoda-like structure surrounded by white flowers and yellow rope barriers.

₩592,800 Cheap Flights from Seattle (SEA) to Bangkok (BKK)

View ₩592,800 flight on Tue, Nov 3, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Suvarnabhumi Intl. Airport (BKK)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Seattle to Bangkok (SEA-BKK)

Prices were available within the past 7 days and start at ₩592,800 for one-way flights and ₩1,175,200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,175,200 Roundtrip, found 5 days ago
₩1,175,200
Roundtrip
found 5 days ago
Select Korean Air flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,175,200 found 5 days ago
Korean Air
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,184,300 Roundtrip, found 5 days ago
₩1,184,300
Roundtrip
found 5 days ago
Select Korean Air flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,184,300 found 5 days ago
United
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,187,500 Roundtrip, found 5 days ago
₩1,187,500
Roundtrip
found 5 days ago
Select United flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,187,500 found 5 days ago
United
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,198,400 Roundtrip, found 5 days ago
₩1,198,400
Roundtrip
found 5 days ago
Select United flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,198,400 found 5 days ago
China Airlines
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,200,100 Roundtrip, found 5 days ago
₩1,200,100
Roundtrip
found 5 days ago
Select China Airlines flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,200,100 found 5 days ago
United
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,209,900 Roundtrip, found 5 days ago
₩1,209,900
Roundtrip
found 5 days ago
Select United flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,209,900 found 5 days ago
All Nippon Airways
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,219,400 Roundtrip, found 5 days ago
₩1,219,400
Roundtrip
found 5 days ago
Select All Nippon Airways flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,219,400 found 5 days ago
United
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,257,900 Roundtrip, found 5 days ago
₩1,257,900
Roundtrip
found 5 days ago
Select United flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,257,900 found 5 days ago
Korean Air
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,258,100 Roundtrip, found 5 days ago
₩1,258,100
Roundtrip
found 5 days ago
Select Korean Air flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,258,100 found 5 days ago
Japan Airlines
Mon, Nov 30 - Mon, Dec 7
SEA
Seattle
BKK
Bangkok
₩1,263,600 Roundtrip, found 5 days ago
₩1,263,600
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Mon, Nov 30 from Seattle to Bangkok, returning Mon, Dec 7, priced at ₩1,263,600 found 5 days ago

Find the cheapest month to fly from Seattle (SEA) to Bangkok (BKK)

November is typically the cheapest month to fly

From ₩1,104,791 - ₩1,266,549 per traveler.

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to BKK?
The lowest price advertised for a round-trip journey from Sea-Tac Airport to Suvarnabhumi Intl. Airport (BKK) is ₩1,175,200. But you better move fast. This price is taken from fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Bangkok Airport?
We understand that things crop up unexpectedly, so we've made it as easy as possible for you to cancel your trip online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to BKK that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Suvarnabhumi Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Bangkok Airport?
With around 12,000 kilometers separating SeaTac and Bang Phli, your flight will be a long one. Pack wisely and make your trip more comfortable. Little things like warm clothes and a quality travel pillow can make all the difference.
Which airlines fly direct from Sea-Tac Airport to Suvarnabhumi Airport?
Currently, no airlines offer direct flights from Sea-Tac Airport to BKK. You'll have to book a flight with one or more stops. To get the best price and connections, lock in your airfare well ahead of time.
Are Seattle - Tacoma Intl. Airport (SEA) to Bangkok Airport flight tickets cheaper when they're purchased at the last minute?
Tickets from Sea-Tac Airport to BKK are available up to a year prior to departure on Expedia. And although you may occasionally score a great last-minute deal, it's not something you should bank on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid getting stuck in the dreaded middle seat! We regularly update our fares to bring you the biggest bargains, so check back often for all the latest specials.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Suvarnabhumi Intl.
Airlines serving
Air France, All Nippon Airways, Cathay Pacific, China Airlines, Delta, EVA Airways, KLM, Korean Air, Qatar Airways, STARLUX Airlines, Singapore Airlines, United
Roundtrip price
₩1,175,200
Distance
11917 km