$283 Find Cheap Flights from Seattle to Thailand

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Thailand departing on 11/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Seattle to Thailand

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Bangkok
Bangkok1 stop$512
Phuket City
Phuket City1 stop$623
Chiang Mai
Chiang Mai1 stop$675
Ko Samui
Ko Samui1 stop$761
Krabi
Krabi2 stops$788
Bangkok
Bangkok1 stop$512
Phuket City
Phuket City1 stop$623
Chiang Mai
Chiang Mai1 stop$675
Ko Samui
Ko Samui1 stop$761
Krabi
Krabi2 stops$788

Book Cheap Seattle to Thailand Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Thailand that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Thailand

Sun, Jan 18 - Fri, Jan 30
Singapore Airlines Logo
8:45 am - 6:45 pmSEA-BKK
43h 00m1 stop
Singapore Airlines Logo
3:40 pm - 7:10 amBKK-SEA
30h 30m1 stop
$512Singapore Airlines
Find Deal
Sun, Jan 18 - Wed, Jan 28
Singapore Airlines Logo
8:45 am - 8:00 pmSEA-BKK
20h 15m1 stop
Singapore Airlines Logo
6:05 pm - 7:10 amBKK-SEA
28h 05m1 stop
$515Singapore Airlines
Find Deal
Sun, Jan 18 - Fri, Jan 30
Singapore Airlines Logo
8:45 am - 8:30 amSEA-BKK
32h 45m1 stop
Singapore Airlines Logo
3:40 pm - 7:10 amBKK-SEA
30h 30m1 stop
$539Singapore Airlines
Find Deal
Mon, Nov 24 - Fri, Dec 5
Asiana Airlines Logo
12:10 am - 10:05 pmSEA-BKK
30h 55m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$642Asiana Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25
Asiana Airlines Logo
12:10 am - 10:05 pmSEA-BKK
30h 55m1 stop
Asiana Airlines Logo
11:55 pm - 1:55 pmBKK-SEA
29h 00m1 stop
$649Asiana Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 10
ANA Logo
10:00 am - 6:00 amSEA-BKK
30h 00m2 stops
ANA Logo
9:35 am - 6:36 pmBKK-SEA
23h 01m2 stops
$687ANA
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Sun, Aug 31 - Tue, Sep 16
China Airlines Logo
1:40 am - 10:20 amSEA-CNX
18h 40m1 stop
China Airlines Logo
11:20 am - 7:20 pmCNX-SEA
22h 00m1 stop
$775China Airlines
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Mon, Jan 12 - Tue, Jan 20
China Airlines Logo
12:10 am - 10:25 amSEA-CNX
19h 15m1 stop
China Airlines Logo
11:25 am - 6:10 pmCNX-SEA
21h 45m1 stop
$801China Airlines
Find Deal
Thu, Oct 9 - Sun, Oct 19
EVA Air Logo
12:30 am - 8:50 pmSEA-USM
30h 20m2 stops
EVA Air Logo
8:50 pm - 7:30 pmUSM-SEA
36h 40m2 stops
$1,032EVA Air
Find Deal
Wed, Oct 1 - Mon, Oct 6
EVA Air Logo
1:30 am - 8:45 amSEA-KBV
41h 15m2 stops
EVA Air Logo
9:25 am - 7:30 pmKBV-SEA
24h 05m2 stops
$1,071EVA Air
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Thailand flights

Get data-powered insights and trends into flights from Seattle to Thailand to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Thailand, 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 Seattle to Thailand is February, when tickets cost $797 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,275 and $1,196 respectively.

What’s the cheapest day of the week to fly from Seattle to Thailand?

The average price of all round-trip flights from Seattle to Thailand clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Seattle to Thailand, look for departures on Tuesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Thailand, Wednesday is the cheapest day to fly and Thursday is the most expensive.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Thailand, 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 Seattle to Thailand, you should book around 7 weeks before departure, which saves you about 13% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.


Good to know

Low seasonMay
Cheapest flight$283
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Seattle to Bangkok Suvarnabhumi Airport

FAQs - booking Thailand flights

  • Are there onsite hotels at Bangkok Airports?

    There are multiple onsite hotels in both Bangkok airports where you can spend some quality time during a layover or spend the night if you are landing late. If you are landing at BKK, you can consider making reservations at the Novotel Suvarnabhumi Airport Hotel, which is a 5-minute walk from the airport. On the other hand, at DMK, you can spend thenight at Sleep Box by Miracle, situated in terminal 2.

  • Which is the most ideal ground transportation in Bangkok?

    When you land in Bangkok, you should opt for car rental services if you want the freedom to explore the city. DMK has multiple car rental agencies such as SIXT, Budget, Hertz, Avis, National and Chic. The car rental booths are located in terminals 1 and 2 DMK. On the other hand, at BKK, you will find rental car agencies, including Europcar, Hertz, Avis, Chic, National, Bizcar and Thai, located in Gate 8 near the passenger terminal 8.

  • Are there any family services at SEA?

    SEA offers exceptional family services that parents or guardians flying through the airport can take advantage of with their kids. The airport features a kids’ play area located between Gate A and the central terminal. Nursing mothers can also access private nursing rooms at the airport’s main terminal.

  • What amenities and services can I have access to at SEA?

    While at SEA, you can enjoy a live music performance from Experience the City Music. Alternatively, you can explore the impressive and eclectic collection of modern sculpture, painting, glass, photography and sound art.

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

    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 Seattle to Thailand.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Thailand 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 Seattle to Thailand?

    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 Seattle to Thailand 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 Seattle to Thailand?

    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 Seattle to Thailand up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Thailand?

    The cheapest time of day to fly to Thailand is generally in the morning, when round-trip flights cost $986 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Thailand is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,081.

Top tips for finding cheap flights to Thailand

  • If you are flying from Seattle to Thailand, ensure that you arrive at the airport at least 3 hours before your scheduled flight departure time. As such, you will have enough time to go through the immigration, get your boarding pass and arrive at your departure terminal without risking missing your flight. Alternatively, you can check in online through your airline website.
  • Seattle Tacoma International Airport (SEA) has several parking options for passengers who wish to leave their cars at the airport while flying from Seattle to Thailand. The airport features both onsite and offsite parking lots. Therefore, you can opt for the offsite parking lot, which is more affordable than the onsite parking lots, if you plan on an extended stay. The onsite parking lots are located at the terminal direct on the upper floors.
  • Upon your arrival at Suvarnabhumi International Airport (BKK) and looking for specific information, you don’t need to worry. The airport features multiple information booths with friendly staff that are always ready to assist. The information desks are located in the arrivals and departure areas.
  • Don Mueang International Airport (DMK) is equipped with shower facilities that passengers using the airport can utilize after a long flight from Seattle. The shower amenities are located in Miracle Lounge in the Domestic departures terminal 2. Charges may apply, so ensure that you confirm with the management before using the amenities.
  • SEA offers unique services for passengers with reduced mobility. If you are flying through the airport, you can have access to wheelchair services and extra assistance. However, for easy access to these services, you need to call your airline prior to your flight date, informing them of what you might need. On the other hand, DMK and BKK have wheelchair-accessible washrooms, parking lots and elevators.

Reviews of the top 5 airlines serving from Seattle to Thailand

 
Need help choosing which airline to fly with from Seattle to Thailand? 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 1222 reviews
8.4Boarding
8.6Crew
8.1Food
8.3Comfort
8.0Entertainment
Airline reviews

Flight Attendants could have been nicer and food portions could be bigger.

8.0 ExcellentKaye, Jul 2025JFK - TPE
Read more EVA Air reviews

Flight Attendants could have been nicer and food portions could be bigger.

Great experience, comfort and food is delicious. Always great service and one time

The food from Los Angeles to Taipei made me throw up. The flight is also not comfort. But the staffs are very friendly and nice.

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

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

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.

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.

Good. Please add a non- applicable category to your questions.

The app was awful. No accurate info. Paying for internet is a negative (Delta is free). The crew was very nice for the most part although you are not guaranteed to get good service. Some crew would ignore requests for things as simple as a cup of water if you were sleeping when the first serving was made. Food was great. Male crew member was exceptionally kind and responsive.

Purchased WiFi was slow to non functional. Staff was not personable or friendly. Seats were cramped. Boarding took long but I expected that.

The flight crew was outstanding. Very cheerful and always respectful. I wish the same could be said about United. The AC wasn't the best on the plane.

Luckily I just tried to sleep. But the entertainment system was awkward to operate. I hate all this stuff with apps and adding it to your phone and all. It is a nuisance. I would prefer a good magazine or newspaper in the pocket in front of me or available.

Upgrade the comfort, food and attendants. Also we arrived in Houston in the morning. The meal they served two hours before our arrival was a dinner entree. It would have been a lot nicer and much more appropriate to have had breakfast.

One of the best 14 hour flights I've ever had. Crew was friendly throughout which can be difficult on longer flights. The crew being kind and respectful is very important for me. Plane felt clean and I was able to get some well needed uninterrupted sleep. I put them slightly above Cathay Pacific as far as cleanliness the only down side was a lack of entertainment selections, but hey I am an American taking a trip on a Japanese airline so I cannot complain. Thank you ANA and the Tokyo airport all very friendly. Will see you soon

Poor. We weren’t able to check in online (for several hours until we gave up) for no apparent reasons although our passports were loaded successfully. When we were at the airport check-in, a rep helped us at the kiosk but she disregarded the KTN provided to her so we had to come back for it after being questioned by the TSA person…

ANA gave me an amazing experience. They are very good with customer service.

Everything was good may improve some alcohol drinks and amenities during fly

The crew was amazing, really friendly and efficient. One of the best flights I have ever been on. They made the long flight comfortable and I noticed there were two birthdays on the flight. They gave to customers birthday cards and wished them a happy birthday. That was very nice to see.

Everything was great. Wifi was down,but that didn't matter to me.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

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 food on this flight from NRT to ICN was average. The staff were very friendly, but the flight took about 60 minutes longer than it should have because the pilot was only flying at 330mph instead of 500-550. Not sure what the reason is for that, but it meant for a much longer flight.

I love my Delta crew, they were so welcoming and helpful.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Most relaxing long distance flight I have been on. And I have flown on many.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

Very routh cabin crew food is only 2 meals for 13 hours fry with them They should get better training how to service good super routh language and talking with customer

The aircraft was massive (A-380) and became crowded with 400+ passengers on board.

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

Staff always with a smile and very helpful with my mom who has mobility issues.

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

It was all perfect and very pleasant for such long flights

Everything you need to know for your flight from Seattle to Thailand

Information on your arrival and departure airports

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