$393 Find Cheap Flights from Thailand to Washington

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KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington
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KAYAK's insights & trends for flights to Washington

Get data-powered insights and trends for flights to Washington to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Washington?

The average price of all flights from Thailand to Washington clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Washington is Thursday where round-trip tickets can be as cheap as $451. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $584 on average.

What is the cheapest month to fly from Thailand to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Thailand to Washington, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Thailand to Washington is November, when tickets cost $742 (return) on average. On the other hand, the most expensive months are January and August, when the average cost of round-trip tickets is $1,180 and $1,131 respectively.

What is the cheapest time of day to fly to Washington?

The average price for all round-trip flights from Thailand to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Washington is generally in the afternoon, when round-trip flights cost $651 on average. Morning departures are around 3% cheaper than evening flights, on average. The most expensive time of day to fly to Washington is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,039.

How far in advance should I book a flight from Thailand to Washington?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Washington, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Thailand to Washington, you should book around 8 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low season

January

High season

June

Cheapest flight

$393
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Bangkok to Seattle

FAQs for booking flights from Thailand to Washington

  • How does KAYAK find such low prices on flights from Thailand to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Thailand to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Thailand to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Thailand to Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Thailand to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Thailand to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Thailand to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Thailand to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Thailand to Washington

 
See real verified KAYAK customer reviews for airlines flying to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Thailand to Washington. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Thailand to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
EVA AirOverall score based on 1180 reviews
8.0Entertainment
8.6Crew
8.3Comfort
8.1Food
8.4Boarding
Airline reviews

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

8.0 ExcellentAnonymous, Mar 2025TPE - IAH
Read more EVA Air reviews

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

The flight attendants should be nicer, on my first flight I told them I’d prefer a veggie meal sometimes and then she began to lecture me about it, it was a late flight and I wanted an easy digestion meal so that I can sleep quickly. The meals were abit odd, breakfast on my last flight had eggs, oatmeal and fish, did not taste good at all, strange combination. The economy seats are very tight and crowded, not comfortable at all. Overall for the price I paid I thought I was going to get more.

seats are pitched well. you don't feel too tight.

For the price, it was better than other airlines; quality of food and service was very good.

I appreciate the email reminders for online check-in which made my entry to the lines less stressful. The flight was on schedule and on time. The baording staff were proactively helpful and approachable. The airplane inflight food, entertainment and comfies as well as provisions are excellent even in the economy seating. The airline transfer was smooth and easy! Luggage safe and intact! Thank you EVA airline for making my trip a reliable safe and comfortable experience.

Great but I am not sure why I was placed in zone 4 for boarding despite being an Infinity Member??? Can you explain online. Thanks

Clean plane, friendly crew, mostly on-time departure. Negativo since there were no snacks offered. Cold drinks only was fine due to turbulence, but nothing to eat? Really?

Excellent food. Good service. Crammed Premium Economy seats. I Asked to change seats during check in. They told me the flight was fully booked. But on board I saw empty seats where I could have been easily relocated.

Except for crying babies all was ok although the movie selection wasn't the best.

The staff was marvelous. The entertainment options were terrible, old or 2nd rate movies. I was unable to entertain myself for 18 hours-it made it seem even longer. Note: I thought about upgrading but your information about what was included was unclear. Are the seats bigger? Are there current moves? What kind of food do you get? Would the upgrade compare to Delta? Just saying the upgrade is better didn’t convince me and I regret not flying Delta.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

The boarding process for Korean airlines is very straightforward and easy. You've never met such helpful and friendly people. The food was great and the entertainment options were excellent too. My teenage boys found programs they wanted to watch while I had fun watching a full season of the Last Man - the Blind Investigator (Japanese), which my wife enjoyed too. My only complaint was that it takes a very long time to taxi at ICN (20 minutes) and the pilot had to hold at the gate for 10 minutes after our scheduled departure time, which meant we got to Seattle 27 minutes late. Luckily I had a long enough connection to make my next flight, but just barely.

Flight delayed going to Korea. No free WiFi. Other than that everything else is were good. I would love to fly with Korea airline again

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

My second flight wasn't better than the first one. And this is 14 hours trip, crew came out only to offer food and the choices was poor. This food choices are good for Asian people but not for westerners. The breakfast kind thing was a corn sausage really disgusting. The air-conditioned blower really blow high and cold, turn out on my arrival to feel seek, that makes the trip uncomfortable. The crew didn't not really come out during the trip to offer drinks or snacks. No fruits available. Very poor service

Our seat row plus one ahead and behind we're completely overlooked during beverage service...

I loved everything, I was just a little confused on my bag allowance. When I checked in it said I was allowed 2 check in bags, but when I got there they said I was only allowed 1 so I had to pay an additional 200 dollars! Other then that everything was great! I would love to use your Airlines again when I fly out to Manila again in late May, however I want to be able to have 2 bags included this time lol 😆

Need to have space for Cary on when traveler boarding any zone

everything was fine, would have liked better food but it was warm, great choices for movies

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

We took business class, It was comfortable and I was able to sleep.

Everything was perfect. A flight attendant even brought me snacks after I declined food due to my desire to force myself to follow the destination time zone.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

The boarding process was good. The toilet could be better maintained.

This has been the worst experience I've ever had. We arrived to Ho Chi Minh Airport and were supposed to get our Asiana ticket from the transfer counter as we came with a different airline. However, the staff at the transfer counter were not helpful and kept giving us different information. We were first told by Asiana airlines staff we had to wait 2 hours so they could print out and give us our tickets, then someone else told us we had to wait 3hrs, someone told us "I don't know, just go sit and wait and we will tell you later." This was at a place in the Ho Chi Minh airport that had no coffee or food shops, nothing, just immigration (to enter Vietnam with a Vietnam Visa) and security (to transfer into the gates) but we needed our printed boarding pass to go through. It wasn't until we demanded to speak to a supervisor as our flight time was 1hr away because they kept telling us "there's alot of time left for your international flight, we will get your tickets later" we still had to wait around 20minutes for the "Supervisor" to give us our tickets. I would NOT recommend Asiana Airlines, especially if going thru Ho Chi Minh Airport as they are not helpful. (We almost missed our flight, due to their lazyness and incompetence of printing our tickets) I would suggest Asiana Airlines to have a Machine in the transfer area so passengers can easily print out their boarding passes themselves and save some money by not hiring incompetent staff that can't do a simple task such as printing a boarding pass.

Great service. They could offer vegetarian food and do more to reduce waste.

Great service and comfortable seats. The first meal was excellent but the second meal was only satisfactory

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Flight was delayed bc of mechanical issue. New plane had different configuration so some seats had to be switched. They called all passengers who needed new boarding cards. They did not call us so we thought our seats were the same and fine. When we boarded they informed us our receipts had changed and we are now all sitting separate and in the back row. Both my daughters had meltdowns and started to cry and once we got on the flight, we figured out how we could sit closer to each other, but this was very upsetting.

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

Any sort of gluten free snack option would be nice

They lost my luggage and it didn’t get delivered until the next day.

Would have thought that they would gas up plane before everyone got on board

Not so good, my business seat is not working properly

Well it's strange everytime going the flight is late coming back the service is superior

Going to Dumaguette 4 times in a row I was late it's terrible

The flight to GES MNL sucks, there was no entertainment. There was no footrest. So the business class seat was not comfortable.

There was something that did not work on every fligjt. No water in business class washroom and inflight entertainment system did not work in business class.

I can't complain. Flying with Philippines airlines was the best choice. They are the best option in the Philippines.

Flight left and arrived on time. Preloading area in Manila could use some help. Area needs to be bigger to at least seat the passengers while waiting. Crew is great nonstop to MNL is a game changer.

Food was great. Hot meals. Entertainment- not so good. They only showed one tv filipino series with only 3 episodes for a 14 hour flight.

Ground and flight crew very courteous and professional. Seats are just ok. Entertainment could be upgraded with newer movies. Food was not good at all.

Great ride! arrived safe and sound. Everything was great altho its still uncomfortable seats too small space to pass through in.

Book cheap flights from Thailand to Washington

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Washington found on KAYAK in the last 72 hours.
9/16Tue
1 stopPhilippine Airlines
38h 35mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
32h 50mSEA-BKK
$635
9/16Tue
1 stopPhilippine Airlines
33h 55mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
32h 50mSEA-BKK
$638
9/16Tue
1 stopEVA Air
16h 45mBKK-SEA
10/7Tue
1 stopEVA Air
22h 35mSEA-BKK
$825
6/2Mon
1 stopAsiana Airlines
38h 35mBKK-SEA
6/30Mon
1 stopAsiana Airlines
30h 40mSEA-BKK
$826
9/16Tue
1 stopEVA Air
16h 45mBKK-SEA
10/7Tue
1 stopEVA Air
21h 35mSEA-BKK
$829
6/26Thu
1 stopKorean Air
25h 35mCNX-SEA
7/22Tue
1 stopKorean Air
18h 35mSEA-CNX
$851
6/26Thu
1 stopKorean Air
25h 35mCNX-SEA
7/22Tue
1 stopKorean Air
18h 35mSEA-CNX
$854
9/24Wed
1 stopAsiana Airlines
25h 45mCNX-SEA
10/19Sun
1 stopAsiana Airlines
19h 25mSEA-CNX
$905
6/8Sun
1 stopAmerican Airlines
16h 30mBKK-SEA
7/4Fri
2 stopsAmerican Airlines
34h 30mSEA-BKK
$977
5/30Fri
2 stopsAmerican Airlines
37h 00mBKK-SEA
6/25Wed
1 stopAmerican Airlines
19h 30mSEA-BKK
$1,009

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Washington found on KAYAK in the last 72 hours.
9/24Wed
1 stopPhilippine Airlines
19h 45mBKK-SEA
$393
5/7Wed
1 stopPhilippine Airlines
19h 45mBKK-SEA
$405
5/23Fri
1 stopPhilippine Airlines
19h 45mBKK-SEA
$411
5/28Wed
1 stopKorean Air
22h 05mBKK-SEA
$563
9/1Mon
1 stopKorean Air
25h 05mBKK-SEA
$645
5/2Fri
1 stopAsiana Airlines
25h 10mBKK-SEA
$660
5/22Thu
1 stopAsiana Airlines
25h 10mBKK-SEA
$664
4/28Mon
1 stopANA
18h 50mBKK-SEA
$712
5/6Tue
1 stopEVA Air
31h 55mBKK-SEA
$766
7/30Wed
1 stopEVA Air
32h 15mBKK-SEA
$776

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Last minute flights to Washington

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Washington that are departing in the next 10 days.
4/26Sat
multi-stopANA
38h 23mBKK-SEA
5/11Sun
multi-stopANA
23h 30mSEA-BKK
$1,041
4/26Sat
multi-stop
40h 03mBKK-SEA
5/11Sun
multi-stop
39h 27mSEA-BKK
$1,278
4/26Sat
multi-stopSTARLUX Airlines
36h 20mBKK-SEA
5/10Sat
multi-stopSTARLUX Airlines
25h 25mSEA-BKK
$1,353
4/25Fri
multi-stopAsiana Airlines
25h 10mBKK-SEA
5/11Sun
multi-stopAsiana Airlines
18h 55mSEA-BKK
$1,678
4/24Thu
multi-stopEVA Air
17h 40mBKK-SEA
5/7Wed
multi-stopEVA Air
26h 11mSEA-BKK
$1,910
4/25Fri
multi-stopPhilippine Airlines
19h 45mBKK-SEA
5/6Tue
multi-stopPhilippine Airlines
37h 38mSEA-BKK
$3,627
4/25Fri
multi-stopPhilippine Airlines
33h 05mBKK-SEA
5/6Tue
multi-stopPhilippine Airlines
43h 03mSEA-BKK
$3,784
4/25Fri
multi-stopEVA Air
16h 45mBKK-SEA
5/5Mon
multi-stopEVA Air
31h 40mSEA-BKK
$4,442
4/28Mon
multi-stopAsiana Airlines
25h 10mBKK-SEA
5/11Sun
multi-stopAsiana Airlines
18h 55mSEA-BKK
$5,250
4/25Fri
multi-stopUnited Airlines
25h 37mBKK-SEA
5/6Tue
multi-stopUnited Airlines
28h 35mSEA-BKK
$5,899

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Everything you need to know for your flight to Washington

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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