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Cheap flights from Seattle to Bangkok

SEA — BKK
19 Aug — 26 Aug1
1 adult

Cheap 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 14 August 2025.

Popular in

December

Cheapest in

February

Average price

C$ 1,161
Highest demand for flights based on searches. 6% potential increase in price (C$ 122 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 60 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Bangkok. Price data was last updated on 8 August 2025.

The best time to book flights from Seattle to Bangkok is 61 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 Seattle to Bangkok?

Currently, September is the cheapest month in which you can book a flight from Seattle to Bangkok (average of C$ 937). Flying from Seattle to Bangkok in December is currently the most expensive (average of C$ 1,406). 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 SEA to BKK?

Find hourly flight availability from Seattle to Bangkok. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 August 2025.

It’s typically best to fly out from Seattle to Bangkok in the morning. Doing so could potentially save you 4% on the flight price compared to flying at noon, which is usually more expensive.

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 14 August 2025.
Read through reviews of airlines operating flights from Seattle to Bangkok, such as EVA Air,ANA, andChina Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,233 reviews
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
ANA
8.4
Very good
933 reviews
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
China Airlines
8.3
Very good
762 reviews
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Asiana Airlines
8.2
Very good
473 reviews
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
Singapore Airlines
8.1
Very good
1,346 reviews
EVA Air
8.4
Very good
1,233 reviews
Check prices

Crew

8.6

Boarding

8.4

Food

8.1

Comfort

8.3

Entertainment

8.0

Overall

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

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?

    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 5 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

    Singapore Airlines, at C$ 738, was found to be the cheapest airline from Seattle to Bangkok.Alternate airlines to your destination round-trip include Asiana Airlines and ANA. Singapore Airlines is priced at 42% 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, September is the cheapest month in which you can book a flight from Seattle to Bangkok (average of C$ 937). Flying from Seattle to Bangkok in December is currently the most expensive (average of C$ 1,406). 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

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Top 5 airlines flying from Seattle to Bangkok

Discover the top 5 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 629,999 searches. Data last updated 14 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapestC$ 738AverageC$ 801FlexibilityNo cancel feeOn-time81%
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Asiana AirlinesCheapestC$ 851AverageC$ 1,038FlexibilityNo cancel feeOn-time76%
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ANACheapestC$ 1,082AverageC$ 1,130FlexibilityNo cancel feeOn-time80%
Search ANA flights
China AirlinesCheapestC$ 1,100AverageC$ 1,180FlexibilityNo cancel feeOn-time70%
Search China Airlines flights
EVA AirCheapestC$ 1,144AverageC$ 1,259FlexibilityNo cancel feeOn-time74%
Search EVA Air flights

Fly with Cheapflights

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

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

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.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Bangkok for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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.

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

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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