$394 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 $1,118 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

$394
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly with an average 1% increase in price.
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 1170 reviews
8.4Boarding
8.1Food
8.0Entertainment
8.3Comfort
8.6Crew
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.

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?

I was sleep when they brought the food. They had put a note on my seat. There was no food when I asked for food later. There was just one main meal served in this 14 hours flight. They offered me sandwich with ham which I don’t eat since I am pescatarian. Long story short I had to wait to get to TPE to get something to eat. I am extremely disappointed from the service. I have been flying EVA since I was 1 year old. Perhaps no more EVA for me. Seems EVA glorious day is long gone

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.

delayed and the cabin crew was like trainees.. a bit careless and not so pleasing to their job

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

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

The staffs are very accomodating!!! The foods are good!!! The entertainment from manila to incheon was miserable because we need to use our own cellphones or own ipads.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Compared with other carriers business class for an overnight was not worth the extra expense.

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

Mostly the experience was good except for the flight changes made by UA which meant longer layover in DC

We were Polaris passengers and found the service poor. The food was ok but the flight attendants were not attentive and rushed the service.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

The flight was late and we missed this connecting flight. American Airlines refused to put us anywhere for the night for their snafu. We had to find our own accommodations in Miami, and it was expensive for a crappy hotel.

The trip was very smooth and they provided great customer service

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Wonderful as usual except for other guests that were unruly and not kept in check by the Crew.

The flight was initially delayed, then cancelled. American Airlines says the cancellation was weather related, though the actual weather was not bad in both Washington and Providence and between. There were very few cancellations that day. In fact, AA2120 from Washington, DC to Boston flew with a minor delay at about the same time. So, the weather somehow affected only this particular flight AA5230. The next available flight was the following morning. The American Airlines refused to reimburse accommodation (hotel at DCA)

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Free wifi was available, but only some time, being at least 30 minutes into the flight. it would have been better that an announcement had been made about the delay.

Cabin was roomy enough to easily slide my carry on under the seat in front of me!

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.

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.

Flight was delayed and caused us to miss our connection. American Airlines did nothing to compensate us and they lost 2 out of 4 of our checked baggage. They have not returned inquiries into customer service and have not offered us compensation. Terrible.

The PAL employee who assisted my minor children went above and beyond her job and our expectations! Sophia was kind, courteous and made sure my children were taken care of!

Overall it’s very acceptable I will gave an A.

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
33h 55mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
22h 40mSEA-BKK
$632
9/16Tue
1 stopPhilippine Airlines
38h 35mBKK-SEA
10/8Wed
1 stopPhilippine Airlines
22h 40mSEA-BKK
$655
5/13Tue
2 stops
32h 28mBKK-SEA
5/21Wed
2 stops
22h 35mSEA-BKK
$752
6/6Fri
1 stopEVA Air
21h 55mCNX-SEA
9/8Mon
1 stopEVA Air
18h 55mSEA-CNX
$817
9/16Tue
1 stopEVA Air
21h 05mBKK-SEA
10/7Tue
1 stopEVA Air
19h 40mSEA-BKK
$817
5/14Wed
1 stopAsiana Airlines
25h 45mCNX-SEA
7/4Fri
1 stopAsiana Airlines
19h 10mSEA-CNX
$857
5/12Mon
1 stopAsiana Airlines
25h 45mCNX-SEA
7/3Thu
1 stopAsiana Airlines
19h 10mSEA-CNX
$864
9/16Tue
3 stopsUnited Airlines
49h 37mBKK-SEA
9/29Mon
1 stopUnited Airlines
22h 05mSEA-BKK
$879
7/11Fri
2 stopsUnited Airlines
29h 06mBKK-SEA
7/31Thu
1 stopUnited Airlines
22h 05mSEA-BKK
$919
9/19Fri
1 stopAmerican Airlines
16h 20mBKK-SEA
10/1Wed
2 stopsAmerican Airlines
31h 11mSEA-BKK
$1,043

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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.
9/4Thu
1 stopPhilippine Airlines
38h 35mBKK-SEA
$394
5/13Tue
1 stopPhilippine Airlines
33h 55mBKK-SEA
$424
5/5Mon
2 stops
46h 16mBKK-PDX
$426
4/7Mon
1 stopAsiana Airlines
25h 45mCNX-SEA
$645
4/7Mon
1 stopAsiana Airlines
25h 10mBKK-SEA
$659
4/28Mon
2 stopsUnited Airlines
25h 40mBKK-SEA
$709
9/2Tue
3 stopsUnited Airlines
27h 54mBKK-SEA
$711
8/17Sun
1 stopEVA Air
22h 15mCNX-SEA
$749
7/10Thu
1 stopEVA Air
32h 15mBKK-SEA
$773
7/10Thu
2 stopsANA
27h 56mBKK-SEA
$784

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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.
4/5Sat
multi-stopChina Airlines
30h 50mBKK-SEA
4/13Sun
multi-stopChina Airlines
34h 15mSEA-BKK
$769
4/5Sat
multi-stopChina Airlines
30h 50mBKK-SEA
4/13Sun
multi-stopChina Airlines
18h 35mSEA-BKK
$798
4/3Thu
multi-stopPhilippine Airlines
38h 35mBKK-SEA
4/16Wed
multi-stopPhilippine Airlines
22h 40mSEA-BKK
$808
4/5Sat
multi-stopPhilippine Airlines
33h 55mBKK-SEA
4/9Wed
multi-stopPhilippine Airlines
22h 40mSEA-BKK
$847
4/2Wed
multi-stopAsiana Airlines
25h 10mBKK-SEA
4/16Wed
multi-stopAsiana Airlines
18h 55mSEA-BKK
$946
4/2Wed
multi-stopAsiana Airlines
25h 10mBKK-SEA
4/16Wed
multi-stopAsiana Airlines
18h 55mSEA-BKK
$973
4/1Tue
multi-stopEVA Air
21h 05mBKK-SEA
4/29Tue
multi-stopEVA Air
32h 00mSEA-BKK
$1,020
4/3Thu
multi-stopUnited Airlines
31h 58mBKK-SEA
4/16Wed
multi-stopUnited Airlines
26h 40mSEA-BKK
$1,241
4/1Tue
multi-stopUnited Airlines
29h 23mBKK-SEA
5/4Sun
multi-stopUnited Airlines
34h 20mSEA-BKK
$1,242
4/2Wed
multi-stopEVA Air
31h 55mBKK-SEA
4/9Wed
multi-stopEVA Air
19h 40mSEA-BKK
$1,280

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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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