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$413+ Cheap flights from Seattle (SEA) to Bangkok

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BKK
Jun 21 — Jun 281
Sun 6/21
Sun 6/28
1 adult, Economy
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Cheap flight deals from Seattle to Bangkok

Cheapest flights from Seattle to Bangkok
Explore the most affordable flight options available from Seattle to Bangkok. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 22, 2026.

This Gotogate deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:40 pm
SEA
-
BKK
1 stop33h 40m
ANA
Thu 11/129:10 am
BKK
-
SEA
1 stop19h 10m
ANA
Deal found 5/17$960
This Gotogate deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/264:30 pm
SEA
-
BKK
1 stop33h 00m
ANA
Mon 9/79:35 am
BKK
-
SEA
1 stop18h 50m
ANA
Deal found 5/18$962
This Gotogate deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:30 pm
SEA
-
BKK
1 stop22h 05m
ANA
Tue 8/259:35 pm
BKK
-
SEA
1 stop30h 50m
ANA
Deal found 5/17$964
This Gotogate deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/134:30 pm
SEA
-
BKK
1 stop23h 25m
ANA
Wed 7/299:35 am
BKK
-
SEA
1 stop18h 50m
ANA
Deal found 5/18$965
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:00 am
SEA
-
BKK
1 stop22h 25m
Multiple Airlines
Sat 10/315:40 pm
BKK
-
SEA
1 stop36h 25m
Multiple Airlines
Deal found 5/19$967
This Orbitz deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:00 am
SEA
-
BKK
1 stop22h 00m
Multiple Airlines
Sun 9/131:10 pm
BKK
-
SEA
1 stop17h 00m
Multiple Airlines
Deal found 5/18$968
This oojo deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:10 pm
SEA
-
BKK
2 stops27h 10m
Singapore Airlines
Sun 10/118:15 pm
BKK
-
SEA
1 stop50h 30m
Singapore Airlines
Deal found 5/19$969
This Gotogate deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:30 pm
SEA
-
BKK
1 stop33h 00m
ANA
Sun 11/810:25 pm
BKK
-
SEA
1 stop29h 55m
ANA
Deal found 5/18$970
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:00 am
SEA
-
BKK
1 stop37h 20m
Hainan Airlines
Fri 11/131:05 am
BKK
-
SEA
1 stop21h 55m
Hainan Airlines
Deal found 5/19$971
This United Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/74:30 pm
SEA
-
BKK
1 stop22h 05m
United Airlines
Thu 10/159:35 am
BKK
-
SEA
1 stop18h 50m
United Airlines
Deal found 5/20$972
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/154:30 pm
SEA
-
BKK
1 stop22h 05m
United Airlines
Wed 11/119:10 am
BKK
-
SEA
1 stop19h 10m
United Airlines
Deal found 5/19$973
This United Airlines deal was found by Cheapflights users on 5/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:45 am
SEA
-
BKK
2 stops25h 10m
United Airlines
Mon 10/59:35 am
BKK
-
SEA
1 stop18h 50m
United Airlines
Deal found 5/18$974

Find flight deals from Seattle to Bangkok

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bangkok (TH1). 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 May 22, 2026.

Round-trip from

$960
(Gotogate)

One-way from

$413
(SmartFares)

Popular in

June

Cheapest in

September

Average price

$903
From Seattle/Tacoma Intl to Bangkok
Search Deals
One-way flight from Seattle/Tacoma Intl to Bangkok
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($150 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Bangkok 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 2,558,603 searches. Data last updated May 22, 2026.
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 - BKK

SEABKK

Seattle/Tacoma Intl

Wed 7/15

5:04 pm-9:35 am

2 stops26h 31m

Bangkok Suvarnabhumi

Mon 8/24

3:45 pm-3:39 pm

2 stops37h 54m

$1,005

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sat 8/15

12:15 pm-9:35 am

2 stops31h 20m

Bangkok Suvarnabhumi

Thu 9/10

9:35 am-2:25 pm

1 stop18h 50m

$1,017

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 7/20

7:20 am-11:35 pm

2 stops26h 15m

Bangkok Suvarnabhumi

Mon 8/10

11:30 pm-11:00 am

1 stop25h 30m

$1,090

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 7/22

3:33 pm-9:35 am

3 stops28h 02m

Bangkok Suvarnabhumi

Wed 8/12

9:35 am-2:25 pm

1 stop18h 50m

$1,115

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 7/22

3:33 pm-9:35 am

3 stops28h 02m

Bangkok Suvarnabhumi

Thu 8/13

9:35 am-2:25 pm

1 stop18h 50m

$1,115

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Wed 7/8

10:29 am-9:35 am

3 stops33h 06m

Bangkok Suvarnabhumi

Mon 8/10

9:35 am-2:25 pm

1 stop18h 50m

$1,214

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Mon 7/20

3:33 pm-9:35 am

3 stops28h 02m

Bangkok Suvarnabhumi

Mon 8/10

9:35 am-2:25 pm

1 stop18h 50m

$1,214

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Tue 7/14

1:05 pm-11:35 pm

1 stop20h 30m

Bangkok Suvarnabhumi

Mon 8/3

1:20 am-1:37 pm

1 stop26h 17m

$1,231

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Fri 7/10

8:45 am-9:35 am

3 stops34h 50m

Bangkok Suvarnabhumi

Mon 7/20

7:00 am-10:00 pm

2 stops29h 00m

$1,267

SeattleBangkok

SEA - BKK

SEABKK

Seattle/Tacoma Intl

Sun 6/14

7:15 pm-5:10 am

1 stop43h 55m

Bangkok Suvarnabhumi

Sun 6/21

6:40 am-5:20 pm

1 stop24h 40m

$1,312

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/18

Showing 1-10 of 37 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
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 Seattle to Bangkok

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

Currently, April is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $140). Flying from Seattle to Bangkok in December is currently the most expensive (average of $2,983). 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?

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

To ensure you get the cheapest price possible for a flight from Seattle to Bangkok, you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Bangkok

Get insights into the airlines that provide service to Bangkok. 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 Bangkok. Reviews last updated May 22, 2026.
Read reviews from past customers who have flown STARLUX Airlines,EVA Air, andChina Airlines from Seattle to Bangkok. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
STARLUX Airlines
8.9
Very good
318 reviews
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
EVA Air
8.5
Very good
1,457 reviews
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
China Airlines
8.3
Very good
826 reviews
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Singapore Airlines
8.2
Very good
1,522 reviews
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Asiana Airlines
8.1
Very good
534 reviews
STARLUX Airlines
8.9
Very good
318 reviews

Overall

8.9

Comfort

8.9

Crew

9.2

Entertainment

8.8

Boarding

9.0

Food

8.6

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again

Related info for your journey

Find useful and relevant information for your journey from Seattle to Bangkok. 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 from for flights from Seattle to Bangkok?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Bangkok. 15 airlines have flights from Seattle/Tacoma Intl to Bangkok on a regular basis. Booking flights from Seattle/Tacoma Intl to Bangkok should not be difficult; the airport handles an average of 0 outbound flights to Bangkok per day.

  • How long is the flight from Seattle to Bangkok?

    United Airlines, Korean Air, and Emirates can get you from Seattle to Bangkok in just under 26h 15m. Your travel time can differ by up to 1h 55m. There are 7443 mi between Seattle and Bangkok. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Philippine Airlines, at $154, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include Singapore Airlines and Asiana Airlines. Philippine Airlines is 82% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Bangkok one-way?

    $275 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on Philippine Airlines and Hainan Airlines, with prices starting from $301 and $331, respectively.

  • Where are the most common layover locations when flying from Seattle to Bangkok?

    The most popular layover on flights from Seattle to Bangkok is Taipei City. Taipei City is followed by Seoul in terms of the most popular layover location on flights from Seattle to Bangkok. Singapore ranks third in terms of the most popular layover location on Seattle to Bangkok flights.

  • What are some popular things to do or see while on a layover in Taipei City?

    Taipei 101, Raohe Street Night Market, and Shilin Night Market are currently the most popular points of interest in Taipei City at the moment. Those on a layover in Taipei City interested in visiting Taipei 101, Raohe Street Night Market, or Shilin Night Market can do so by traveling 21.0 mi, 21.6 mi, and 18.3 mi, respectively from Taipei City Taiwan Taoyuan Intl. Travelers can book a car rental at Taipei City Taiwan Taoyuan Intl for about $85 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Seoul?

    The majority of Seoul visitors spend their time at Dongdaemun Market, Lotte World, and Gwanghwamun. Dongdaemun Market, Lotte World, and Gwanghwamun can be accessed by traveling approximately 31.6 mi, 35.7 mi, and 30.1 mi, respectively from Incheon Intl. Travelers in need of a car in Seoul can rent one for about $50 per day.

  • What are points of interest worth seeing during a layover in Singapore?

    Most Singapore visitors opt to spend their time at Sentosa, Universal Studios Singapore, and Merlion. Sentosa, Universal Studios Singapore and Merlion are located about 13.4 mi, 13.4 mi, and 10.5 mi, respectively from Singapore Changi if you are interested in checking them out. Those on a layover in Singapore in need of a rental car can book one at Singapore Changi for about $88.

  • Where are the least popular layover locations for Seattle to Bangkok flights?

    Seattle to Bangkok flights have a layover in Istanbul the least frequently. Seattle to Bangkok flights stopping in Tokyo are the next rarest. Manila follows Tokyo in terms of the least frequent layover locations on Seattle to Bangkok flights.

  • 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, April is the cheapest month in which you can book a flight from Seattle to Bangkok (average of $140). Flying from Seattle to Bangkok in December is currently the most expensive (average of $2,983). 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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Top 10 airlines flying from Seattle to Bangkok

Discover the top 10 airlines that operate flights from Seattle to Bangkok. 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 2,558,603 searches. Data last updated May 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Philippine AirlinesCheapest$154Average$677FlexibilityNo cancel feeOn-time60%
Singapore AirlinesCheapest$510Average$659FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$626Average$689FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$652Average$719FlexibilityNo cancel feeOn-time81%
ANACheapest$680Average$853FlexibilityNo cancel feeOn-time80%
DeltaCheapest$694Average$862FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$697Average$925FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$705Average$880FlexibilityNo cancel feeOn-time72%
China AirlinesCheapest$729Average$815FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$745Average$857FlexibilityNo cancel feeOn-timeN/A

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