$273 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 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 $1,118 respectively.

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 seasonJanuary
High seasonJune
Cheapest flight$273
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.

  • What is the cheapest day to fly to Washington?

    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 time of day to fly to Washington?

    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.

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 1186 reviews
8.0Entertainment
8.6Crew
8.4Boarding
8.1Food
8.3Comfort
Airline reviews

Aircraft was late getting to the gate - probably due to weather. We left the gate one hour late and had to wait another hour since we lost our slot in the takeoff queue. Our box was very wet and was falling apart when we got to Clark. It appears that luggage was exposed to weather in TPE while waiting to be loaded. Crew, however, handled the delay well and was able to provide planned service.

10.0 ExcellentDale, Apr 2025TPE - CRK
Read more EVA Air reviews

Aircraft was late getting to the gate - probably due to weather. We left the gate one hour late and had to wait another hour since we lost our slot in the takeoff queue. Our box was very wet and was falling apart when we got to Clark. It appears that luggage was exposed to weather in TPE while waiting to be loaded. Crew, however, handled the delay well and was able to provide planned service.

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.

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

They were very accommodating of a dietary issue. Nice movie & tv selections. Non-stop helped get through a very long (15 hr) flight

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 😆

The overall experience was ok, though there was certainly room for improvement. My husband was asked to check his carry-on bag at the gate due to claims that the flight was “full.” However, upon boarding, we observed ample overhead space and several empty rows of seats. This made the request appear unnecessary and caused some discomfort, particularly as he was the only passenger singled out for this procedure.

The flight was smooth, but there were not enough options for meals and I was given beef when I do not eat beef. The flight going was much better because we received more snacks.

This was a large plane with an upper deck. It seems like business was upstairs. If it was a US airline then I would say I sat in economy plus, but I think it was just economy. Though since ANA would not allow me to choose seats for the price it may have been plus. Lots of movies to choose from, and good service.

Thankful for the staff who provided blankets cause the plane was quite cold and no way to adjust the airflow in the seats next to the bathroom.

This was the best airline I’ve ever taken. The staff are amazing. The food was great. The pilot was phenomenal. I would highly recommend this airline.

Uh there was a delay, because of the weather. And what took usually an hour flight to Louisville took about 6+ hours. Flight got canceled

I had to get rerouted because the weather delayed my flight enough to miss both of my connecting flights. I select nearly 2 hours on customer service trying to get rerouted and had to miss my first plane which took my luggage to San Francisco. Luckily, customer service sent me to the same airport but I had to ride 12 hours in economy after I paid extra for premium economy. Totally sucks that I overpaid. Customer service and airplane crew were great and really helpful though. Although I still hate how small the seat was, especially since I'm smaller than average, I can't imagine how much it would suck for an average sized person.

Flight attendant took good care of my mom as she boarded on and off the aircraft from her wheelchair. I did not care much for the food nor the movie options Available. I appreciated the increased legroom available in economy. This was one of the main reasons we chose the airline. Overall, the good value and I would fly again.

I stopped flying with United back in the nineties. Today's experience reminded me of why.

ANA was fine. LAX has some major problems. I needed a wheelchair and BKK and Narita were very good. I do have to remember NOT to tip in Japan. LAX however, was poor. first the attendant wasn't able to push me. The next person left me stranded in several locations. They would just leave me where ever they felt like; No logic to these locations. finally when we cleared immigration, they (there were several people who didn't seem to care about their job) left me in a large room with a baggage carousal. I tried to locate my luggage to no avail. meanwhile my connection was getting closer. I finally talked with Emir from ANA and he showed me to my carousal which was located a few rooms away from where LAX personnel stranded me. Emir also found a good wheelchair attendant to take me the rest of the way. Without Emir from ANA, I would still be stranded, given the amount of care shown by the first wheelchair attendants.

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

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.

The staff was wonderful. Really took good care of me. The food was not my favorite.

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.

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.
8/3Sun
1 stop
31h 05mBKK-SEA
8/11Mon
1 stop
18h 25mSEA-BKK
$273
8/4Mon
1 stopSTARLUX Airlines
36h 45mBKK-SEA
8/10Sun
1 stopSTARLUX Airlines
20h 45mSEA-BKK
$396
9/16Tue
1 stopPhilippine Airlines
33h 55mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
32h 50mSEA-BKK
$634
9/16Tue
1 stopPhilippine Airlines
33h 55mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
22h 40mSEA-BKK
$635
6/3Tue
1 stopKorean Air
25h 35mCNX-SEA
7/15Tue
1 stopKorean Air
18h 35mSEA-CNX
$810
6/16Mon
1 stopKorean Air
22h 15mBKK-SEA
9/9Tue
1 stopKorean Air
18h 55mSEA-BKK
$815
6/2Mon
1 stopAsiana Airlines
38h 35mBKK-SEA
6/30Mon
1 stopAsiana Airlines
30h 40mSEA-BKK
$822
6/23Mon
1 stopEVA Air
21h 05mBKK-SEA
7/14Mon
1 stopEVA Air
20h 55mSEA-BKK
$824
6/2Mon
1 stopEVA Air
21h 55mCNX-SEA
6/30Mon
1 stopEVA Air
18h 35mSEA-CNX
$827
6/23Mon
1 stopAsiana Airlines
25h 10mBKK-SEA
7/15Tue
1 stopAsiana Airlines
18h 40mSEA-BKK
$909

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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.
10/7Tue
1 stopPhilippine Airlines
38h 35mBKK-SEA
$393
9/12Fri
1 stopPhilippine Airlines
19h 45mBKK-SEA
$402
5/15Thu
1 stopPhilippine Airlines
38h 35mBKK-SEA
$423
5/11Sun
1 stopKorean Air
27h 00mBKK-SEA
$527
5/28Wed
1 stopKorean Air
22h 05mBKK-SEA
$549
5/14Wed
1 stopAsiana Airlines
25h 10mBKK-SEA
$656
5/30Fri
1 stopAsiana Airlines
25h 10mBKK-SEA
$658
7/30Wed
1 stopEVA Air
32h 15mBKK-SEA
$775
7/16Wed
1 stopEVA Air
31h 35mBKK-SEA
$776
5/29Thu
2 stopsAmerican Airlines
54h 11mBKK-PDX
$3,187

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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.
5/2Fri
multi-stopAsiana Airlines
25h 10mBKK-SEA
5/13Tue
multi-stopAsiana Airlines
18h 55mSEA-BKK
$949
5/3Sat
multi-stopChina Airlines
30h 50mBKK-SEA
6/28Sat
multi-stopChina Airlines
25h 10mSEA-BKK
$955
5/3Sat
multi-stopEVA Air
22h 34mBKK-SEA
5/12Mon
multi-stopEVA Air
19h 05mSEA-BKK
$1,095
5/1Thu
multi-stopEVA Air
18h 20mBKK-SEA
6/16Mon
multi-stopEVA Air
22h 15mSEA-BKK
$1,122
5/3Sat
multi-stopANA
38h 30mBKK-SEA
5/14Wed
multi-stopANA
30h 00mSEA-BKK
$1,128
5/4Sun
multi-stopKorean Air
38h 50mBKK-SEA
6/25Wed
multi-stopKorean Air
20h 30mSEA-BKK
$1,131
5/1Thu
multi-stopKorean Air
38h 01mCNX-SEA
6/28Sat
multi-stopKorean Air
19h 00mSEA-CNX
$1,145
5/3Sat
multi-stopPhilippine Airlines
38h 35mBKK-SEA
5/14Wed
multi-stopPhilippine Airlines
22h 40mSEA-BKK
$1,178
5/3Sat
multi-stopPhilippine Airlines
33h 55mBKK-SEA
5/14Wed
multi-stopPhilippine Airlines
28h 05mSEA-BKK
$3,472
5/2Fri
multi-stopANA
30h 50mBKK-SEA
5/13Tue
multi-stopANA
22h 05mSEA-BKK
$4,026

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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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