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Cheap flights from Bangkok to Seattle from ฿13,139

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — SEA
24 Dec — 31 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Bangkok to Seattle/Tacoma Intl are usually found in November or February, booked 65 days in advance, depart on a Monday or Thursday and return on a Tuesday

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Cheapest flights from Bangkok to Seattle
Explore the most affordable flight options available from Bangkok to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 November 2025.

Mon 22/1223:50BKK - SEA
1 stop33h 50mPhilippine Airlines
Wed 7/121:30SEA - BKK
1 stop34h 30mPhilippine Airlines
Deal found 21/11฿20,712
Tue 25/1118:45BKK - SEA
1 stop38h 55mPhilippine Airlines
Tue 2/1221:30SEA - BKK
1 stop34h 30mPhilippine Airlines
Deal found 24/11฿21,036
Fri 5/1213:20BKK - SEA
1 stop20h 20mPhilippine Airlines
Tue 13/121:30SEA - BKK
1 stop29h 20mPhilippine Airlines
Deal found 23/11฿21,359
Fri 26/1213:20BKK - SEA
1 stop20h 20mPhilippine Airlines
Sun 4/121:30SEA - BKK
1 stop34h 30mPhilippine Airlines
Deal found 23/11฿24,660
Tue 25/1117:15BKK - SEA
1 stop15h 55mEVA Air
Mon 1/1200:10SEA - BKK
1 stop20h 00mEVA Air
Deal found 24/11฿24,790
Sat 20/1202:35BKK - SEA
1 stop30h 35mChina Airlines
Sat 27/1200:10SEA - BKK
1 stop18h 40mChina Airlines
Deal found 23/11฿25,146
Mon 22/1212:15BKK - SEA
2 stops33h 52mMultiple Airlines
Wed 7/112:30SEA - BKK
1 stop36h 55mMultiple Airlines
Deal found 21/11฿25,178
Fri 5/1213:20BKK - SEA
1 stop20h 20mMultiple Airlines
Mon 12/100:10SEA - BKK
1 stop20h 05mMultiple Airlines
Deal found 23/11฿25,599
Wed 26/1116:55BKK - SEA
2 stops38h 15mUnited Airlines
Mon 12/119:30SEA - BKK
2 stops24h 55mUnited Airlines
Deal found 24/11฿25,955
Fri 26/1213:20BKK - SEA
1 stop20h 20mMultiple Airlines
Sat 3/100:10SEA - BKK
1 stop30h 50mMultiple Airlines
Deal found 23/11฿26,020
Wed 26/1119:10BKK - SEA
2 stops27h 55mMultiple Airlines
Sun 11/100:10SEA - BKK
1 stop20h 05mMultiple Airlines
Deal found 24/11฿26,343
Tue 2/1213:20BKK - SEA
1 stop20h 20mMultiple Airlines
Sat 10/113:36SEA - BKK
2 stops29h 34mMultiple Airlines
Deal found 24/11฿26,473

Cheap flight deals from Bangkok to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Bangkok (TH1) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 24 November 2025.

Round-trip from

฿19,418

One-way from

฿13,139

Popular in

July

Cheapest in

November

Average price

฿25,728
Philippine Airlines
  • Philippine Airlines
  • 17/3-7/4
  • 2 total stops
  • 61h 30m total
  • Bangkok to Seattle
Search Deals
Philippine Airlines
  • Philippine Airlines
  • 21/1
  • 1 total stop
  • 20h 20m total
  • Bangkok to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (฿103,749 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿19,165 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Bangkok to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 17,341 searches. Data last updated 24 November 2025.
Use the filters below to find and compare flights from Bangkok to Seattle that are best for you.

Fly from

Bangkok

Fly to

Seattle

Route

Depart

Return

Price

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Tue 24/2

13:20-18:40

1 stop20h 20m

Seattle/Tacoma Intl

Sun 22/3

22:30-12:00

1 stop23h 30m

฿21,748

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Thu 26/2

13:20-18:40

1 stop20h 20m

Seattle/Tacoma Intl

Fri 27/3

22:30-21:50

1 stop33h 20m

฿22,071

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Sat 20/12

02:35-18:10

1 stop30h 35m

Seattle/Tacoma Intl

Sat 27/12

00:10-09:50

1 stop18h 40m

฿25,146

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Mon 6/4

02:40-19:30

1 stop30h 50m

Seattle/Tacoma Intl

Sat 23/5

01:10-16:20

1 stop25h 10m

฿25,146

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Mon 9/2

02:35-18:10

1 stop30h 35m

Seattle/Tacoma Intl

Mon 9/3

01:10-16:45

1 stop25h 35m

฿25,211

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Thu 9/4

13:30-20:10

1 stop20h 40m

Seattle/Tacoma Intl

Fri 24/4

23:05-21:50

1 stop32h 45m

฿25,275

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Thu 9/4

13:30-20:10

1 stop20h 40m

Seattle/Tacoma Intl

Sun 19/4

23:05-16:45

1 stop27h 40m

฿25,275

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Sun 25/1

16:55-21:12

3 stops43h 17m

Seattle/Tacoma Intl

Sat 31/1

17:12-11:25

2 stops27h 13m

฿25,631

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Wed 15/4

15:40-01:14

2 stops23h 34m

Seattle/Tacoma Intl

Tue 30/6

16:30-04:35

1 stop22h 05m

฿26,020

BangkokSeattle

BKK - SEA

BKKSEA

Bangkok Suvarnabhumi

Fri 22/5

12:20-14:55

1 stop16h 35m

Seattle/Tacoma Intl

Mon 1/6

00:10-23:10

1 stop33h 00m

฿26,182

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 45 results
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Best time to book a flight from Bangkok to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Bangkok with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Bangkok to Seattle. Price data was last updated on 21 November 2025.

The best time to book flights from Bangkok to Seattle is 65 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.

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

Currently, June is the cheapest month in which you can book a flight from Bangkok to Seattle (average of ฿20,194). Flying from Bangkok to Seattle in July is currently the most expensive (average of ฿25,275). 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.

What is the cheapest time of day to fly from BKK to SEA?

Find hourly flight availability from Bangkok to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 24 November 2025.

When flying from Bangkok to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 28% versus a flight in the afternoon.

What is the cheapest day to fly from Bangkok to Seattle?

Use this chart to determine the cheapest time to fly return from Bangkok to Seattle. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Bangkok to Seattle flight should consider departing on Wednesday at midday when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 24 November 2025.
Read through reviews of airlines operating flights from Bangkok to Seattle, such as STARLUX Airlines, EVA Air, andKorean Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very Good
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
EVA Air
8.4
Very Good
1,283 reviews
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Korean Air
8.4
Very Good
1,170 reviews
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.3
Very Good
782 reviews
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Asiana Airlines
8.2
Very Good
488 reviews
STARLUX Airlines
8.9
Very Good
Check prices

Comfort

8.9

Crew

9.2

Overall

8.9

Entertainment

8.9

Boarding

9.0

Food

8.7

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Related info for your journey

Find useful and relevant information for your journey from Bangkok to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Bangkok. Booking flights from Bangkok to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Bangkok from 7 different airlines.

  • How long is the flight from Bangkok to Seattle?

    Philippine Airlines and China Airlines can get you from Bangkok to Seattle in just under 20h 20m. Your travel time can differ by up to 10h 15m. Bangkok and Seattle are separated by a distance of 11978 km. Both multi-stop and direct flights can be found to your destination and back.

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

    According to our current data, Philippine Airlines (฿20,779), Asiana Airlines (฿22,209), and STARLUX Airlines (฿23,888) offers the cheapest pricing from Bangkok to Seattle. Philippine Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Bangkok to Seattle 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 Bangkok to Seattle?

    Currently, June is the cheapest month in which you can book a flight from Bangkok to Seattle (average of ฿20,194). Flying from Bangkok to Seattle in July is currently the most expensive (average of ฿25,275). 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

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Alternative routes for Bangkok to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Chiang Mai to Seattle flights
Chiang Mai to Portland flights

Top 7 airlines flying from Bangkok to Seattle

Discover the top 7 airlines that operate flights from Bangkok to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 17,341 searches. Data last updated 24 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest฿20,779Average฿22,205FlexibilityNo cancel feeOn-time60%
Search Philippine Airlines flights
Asiana AirlinesCheapest฿22,209Average฿23,938FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
STARLUX AirlinesCheapest฿23,888Average฿27,595FlexibilityNo cancel feeOn-timeN/A
Search STARLUX Airlines flights
China AirlinesCheapest฿24,190Average฿27,730FlexibilityNo cancel feeOn-time70%
Search China Airlines flights
EVA AirCheapest฿26,388Average฿28,100FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Korean AirCheapest฿26,595Average฿31,552FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
เดลต้าCheapest฿27,063Average฿29,788FlexibilityNo cancel feeOn-timeN/A
Search เดลต้า flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Bangkok to Seattle?

Deals for Bangkok to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Bangkok to Seattle?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Bangkok to Seattle.

Can Cheapflights find flights from Bangkok to Seattle with no change fees?

Yes, we can. To see specific flights from Bangkok to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Bangkok to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Bangkok to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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