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Cheap flights from Seattle to Bangkok from C$ 607

SEA — BKK
12 Dec — 19 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Bangkok

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Bangkok

Sun 29/119:30 p.m. -
1 stop20h 25m
Mon 14/121:10 p.m. -
1 stop20h 35m
Deal found 10/11C$ 1,149
Thu 26/1110:05 a.m. -
1 stop33h 35m
Wed 9/127:30 p.m. -
2 stops27h 35m
Deal found 12/11C$ 1,172
Sat 28/1110:20 a.m. -
1 stop22h 15m
Mon 7/121:05 a.m. -
1 stop22h 15m
Deal found 11/11C$ 1,175
Sun 29/119:30 p.m. -
1 stop34h 15m
Thu 10/129:55 a.m. -
1 stop23h 50m
Deal found 9/11C$ 1,183
Thu 26/1110:05 a.m. -
1 stop33h 35m
Mon 14/124:20 p.m. -
1 stop31h 00m
Deal found 12/11C$ 1,186
Thu 26/1110:05 a.m. -
1 stop33h 35m
Mon 7/121:05 a.m. -
1 stop22h 15m
Deal found 12/11C$ 1,189
Tue 1/1210:20 a.m. -
1 stop22h 15m
Mon 14/121:05 a.m. -
1 stop22h 15m
Deal found 9/11C$ 1,199
Tue 1/1210:20 a.m. -
1 stop22h 15m
Wed 9/127:30 p.m. -
2 stops27h 35m
Deal found 9/11C$ 1,203
Tue 24/1110:20 a.m. -
1 stop37h 00m
Wed 9/127:30 p.m. -
2 stops27h 35m
Deal found 12/11C$ 1,206
Sat 28/1110:20 a.m. -
1 stop22h 15m
Wed 9/127:30 p.m. -
2 stops27h 35m
Deal found 12/11C$ 1,212

Find flight deals from Seattle to Bangkok

Round-trip from

C$ 1,101

One-way from

C$ 607

Popular in

December

Cheapest in

March

Average price

C$ 1,247
Philippine Airlines
  • Philippine Airlines
  • 14/3-22/4
  • 2 total stops
  • 43h 40m total
  • Seattle to Bangkok
Search Deals
Hainan Airlines
  • Hainan Airlines
  • 31/12-31/12
  • 1 total stop
  • 41h 20m total
  • Seattle to Bangkok
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 23/11

10:25 a.m.-3:55 p.m.

1 stop38h 30m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 656
Quickest round-trip

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 1/2

12:50 p.m.-11:05 p.m.

1 stop19h 15m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 664

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Wed 3/2

12:10 a.m.-1:25 p.m.

1 stop22h 15m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 667

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 15/3

12:15 p.m.-5:10 a.m.

2 stops26h 55m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 673

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 1/3

1:13 p.m.-11:30 a.m.

3 stops31h 17m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 673

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Tue 19/1

9:01 a.m.-11:30 a.m.

3 stops35h 29m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 717

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Mon 7/12

6:15 a.m.-11:30 a.m.

2 stops38h 15m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 781

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 22/1

7:28 p.m.-11:30 a.m.

3 stops49h 02m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 791

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Fri 29/1

1:18 p.m.-11:30 a.m.

3 stops55h 12m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 799

SeattleBangkok

SEA Seattle/Tacoma Intl - BKK Bangkok Suvarnabhumi

SEABKK

Seattle/Tacoma Intl

Thu 4/2

3:34 p.m.-11:30 a.m.

3 stops52h 56m

Bangkok Suvarnabhumi

Wed 31/12

12:00 a.m.-9:00 a.m.

Nonstop0h 00m

C$ 799

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Bangkok

Have a flexible travel schedule? Discover the best time to fly to Bangkok from Seattle with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Bangkok

What is the cheapest month to book a flight from Seattle to Bangkok?

Currently, March is the cheapest month in which you can book a flight from Seattle to Bangkok (average of C$ 1,074). Flying from Seattle to Bangkok in December is currently the most expensive (average of C$ 1,789). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Seattle to Bangkok?

Airfare is below average for this route at the moment.
Seattle to Bangkok flights typically cost between C$ 1,134 and C$ 1,401 in March.
The cheapest round-trip price found within the last 5 days was C$ 1,101 on Philippine Airlines (14 Mar-22 Apr).

How far ahead should I book a flight from Seattle to Bangkok?

The best time to book flights from Seattle to Bangkok is 58 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Bangkok

Read through reviews of airlines operating flights from Seattle to Bangkok, such as EVA Air and Asiana Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.5
Very good
1,554 reviews
Check prices

Overall

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

TPE - CNX

I appreciate the free WIFI and meals. The crew are friendly.
EVA Air
8.5
Very good
1,554 reviews
EVA Air
8.5
Very good
1,554 reviews
Check prices

Overall

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

TPE - CNX

I appreciate the free WIFI and meals. The crew are friendly.
Asiana Airlines
8.1
Very good
572 reviews
EVA Air
8.5
Very good
1,554 reviews
Check prices

Overall

8.5

Crew

8.7

Comfort

8.3

Food

8.1

Entertainment

8.0

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Oct 2026

TPE - CNX

I appreciate the free WIFI and meals. The crew are friendly.

Related info for your journey

  • What airport do you fly from for flights from Seattle to Bangkok?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Bangkok. On average, Seattle/Tacoma Intl has 0 outbound flights to Bangkok per day from 2 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • How long is the flight from Seattle to Bangkok?

    For as low as C$ 1,333, Cathay Pacific can have you in Bangkok from Seattle in 19h 25m. The distance between Seattle and Bangkok is about 11978 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Seattle to Bangkok round-trip?

    Asiana Airlines, at C$ 901, was found to be the cheapest airline from Seattle to Bangkok. An alternate airline flying to your destination would be EVA Air. Asiana Airlines is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Seattle to Bangkok that include hotel bookings?

    Yes. In addition to deals on Seattle to Bangkok flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Bangkok?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Bangkok.

  • Can I find deals for business class flights from Seattle to Bangkok?

    Yes. Cheapflights offers flight deals from Seattle to Bangkok by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Bangkok?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Bangkok (average of C$ 1,074). Flying from Seattle to Bangkok in December is currently the most expensive (average of C$ 1,789). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Seattle to Bangkok

AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapestC$ 901AverageC$ 956FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
EVA AirCheapestC$ 1,096AverageC$ 1,300FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

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When you search for this flight from Seattle to Bangkok, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Need flexible booking options for your flight to Bangkok from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Bangkok from Seattle today and book when prices fit your budget.

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