$354 Find Cheap Flights from Seattle to Bangkok

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 Bangkok departing on 1/13. 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, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Bangkok.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Bangkok.
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Everything you should know

Cheapest round-trip
$671
Overall average: $796
Hainan Airlines
Tue 3/17Fri 3/27
SEA - BKK • 1 stop
Cheapest one-way
$354
Typical prices: $400-$553
Hainan Airlines
Tue 1/13
SEA - BKK • 1 stop
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When to book
6 weeks
in advance
Our data shows that travelers who book at least 6 weeks in advance save around 3% compared to booking last minute.
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Booking Insights
Flight Deals

Cheap Flights from Seattle to Bangkok (SEA-BKK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Bangkok 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 Bangkok

Tue, Mar 17 - Fri, Mar 27
Hainan Airlines Logo
11:00 am - 2:20 pm
SEA
-
BKK
37h 20m1 stop
Hainan Airlines Logo
1:05 am - 9:00 am
BKK
-
SEA
21h 55m1 stop
$671Hainan Airlines
Fri, Jan 30 - Mon, Feb 9
Singapore Airlines Logo
8:45 am - 8:00 pm
SEA
-
BKK
20h 15m1 stop
Singapore Airlines Logo
9:10 pm - 7:10 am
BKK
-
SEA
25h 00m1 stop
$681Singapore Airlines
Thu, Mar 19 - Mon, Mar 30
Philippine Airlines Logo
10:30 pm - 12:00 pm
SEA
-
BKK
23h 30m1 stop
Philippine Airlines Logo
7:30 pm - 8:05 pm
BKK
-
SEA
38h 35m1 stop
$682Philippine Airlines
Sun, Mar 1 - Tue, Mar 31
Multiple Airlines Logo
8:45 am - 2:35 pm
SEA
-
BKK
38h 50m1 stop
Multiple Airlines Logo
3:30 pm - 9:57 am
BKK
-
SEA
32h 27m2 stops
$683Multiple Airlines
Thu, Mar 26 - Fri, Apr 17
Hainan Airlines Logo
11:05 am - 10:05 am
SEA
-
BKK
33h 00m2 stops
Hainan Airlines Logo
1:50 pm - 9:00 am
BKK
-
SEA
33h 10m1 stop
$685Hainan Airlines
Sat, Mar 7 - Tue, Mar 17
Multiple Airlines Logo
8:45 am - 8:25 am
SEA
-
BKK
32h 40m1 stop
Multiple Airlines Logo
3:50 pm - 11:00 am
BKK
-
SEA
33h 10m2 stops
$686Multiple Airlines
Sat, Apr 4 - Fri, Apr 17
Hainan Airlines Logo
11:00 am - 12:20 pm
SEA
-
BKK
35h 20m1 stop
Hainan Airlines Logo
12:40 am - 9:00 am
BKK
-
SEA
22h 20m1 stop
$687Hainan Airlines
Thu, Jan 22 - Fri, Mar 6
Hainan Airlines Logo
10:05 am - 10:40 am
SEA
-
BKK
33h 35m1 stop
Hainan Airlines Logo
1:05 am - 8:00 am
BKK
-
SEA
21h 55m1 stop
$688Hainan Airlines
Sat, Mar 21 - Fri, Mar 27
Hainan Airlines Logo
11:00 am - 11:25 pm
SEA
-
BKK
22h 25m1 stop
Hainan Airlines Logo
1:05 am - 9:00 am
BKK
-
SEA
21h 55m1 stop
$689Hainan Airlines
Sun, Mar 8 - Tue, Mar 24
China Airlines Logo
1:10 am - 9:50 am
SEA
-
BKK
18h 40m1 stop
China Airlines Logo
2:05 pm - 7:10 pm
BKK
-
SEA
19h 05m1 stop
$692China Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Bangkok flights

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

Find cheap flights to Bangkok
Find cheap flights to Bangkok

Planning a trip from Seattle to Bangkok? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

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

Your flight ticket price will generally be cheaper if you fly to Bangkok on a Tuesday and more expensive on a Friday. On your return trip to Seattle, you should consider flying back on a Wednesday, and avoid Thursdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Bangkok, 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 Bangkok is September, where tickets cost $751 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,232 and $1,227 respectively.

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

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 Bangkok, 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 Bangkok, you should book around 6 weeks before departure, which saves you about 3% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Cheapest flight$354
Flight from Seattle to Bangkok Suvarnabhumi Airport

When to book flights from Seattle to Bangkok

Are your dates flexible? Find out the best times to travel from Seattle to Bangkok based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Bangkok

  • How can I fly from Seattle to Bangkok?

    There are multiple major airlines operating between Seattle and Bangkok. Some of the airlines that frequently travel this route are Singapore Airlines, Korean Airlines and Asian Airlines. Note that there are no direct flights on this route. If you are looking to save on some dollars, you can book the flights with one layover, usually with stops at ICN and NRT.

  • What is the best hotel to stay in in Bangkok?

    There are various hotels located near and at BKK in Bangkok, if you are arriving late in the city. Consider staying at the Millenium Hilton Bangkok, Novotel Bangkok Platinum Pratunam and Radisson Suites Bangkok Sukhumvit. These hotels are within the airport’s proximity and hence are conveniently accessible. As a result, you can avoid the nighttime hassles.

  • Are there medical facilities at BKK?

    Yes, you will find exceptional medical facilities located at BKK, providing emergency services to passengers who get sick while at the airport. Vejthani Hospital Services is an outstanding walk-in clinic located at the airport. Ensure that you visit the hospital if you need urgent medical care.

  • Can I smoke at SEA?

    Smoking is not permitted within the terminal since SEA is a non-smoking facility. Only in defined areas is smoking allowed on the lower airport road sidewalk outside of the baggage claim area. So, if you feel like smoking at SEA, you can take advantage of these facilities.

  • What is the cheapest flight from Seattle to Bangkok?

    In the last 3 days, the lowest price for a flight from Seattle to Bangkok was $354 for a one-way ticket and $671 for a round-trip.

  • Do I need a passport to fly between Seattle and Bangkok?

    Yes

  • Which aircraft models fly most regularly from Seattle to Bangkok?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Bangkok?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Bangkok, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Bangkok from Seattle?

    Taipei City is the most popular layover city among KAYAK users traveling from Seattle to Bangkok.

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

    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 Bangkok.

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

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

    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 to Bangkok with an airline and back to Seattle with another airline.

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

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

KAYAK’s top tips for finding a cheap flight from Seattle to Bangkok

  • If you have scheduled an early morning flight from Seattle Tacoma International Airport (SEA) in Seattle to Bangkok and are looking for accommodation, look no further than Ramada by Wyndham SEATAC Airport Hotel. Located approximately 0.7 miles, it is conveniently accessible. As a result, you will wake up refreshed and avoid the early morning commute.
  • Passengers looking forward to traveling through SEA from Seattle with their four-legged companions should not panic as SEA is a furry-friendly airport. It features exceptional pet relief facilities equipped with fire hydrants, disposable waste bags and sinks. Located at Carousel 1/#door 02, Carousel 33/#door, Carousel 16/door# 26 and near the parking garage are easily accessible. So passengers can utilize these services before boarding their flight to Bangkok.
  • On your way to Bangkok, watch out for currency exchange counters at SEA, as in Bangkok, they use THB instead of USD. At SEA, you will find the currency exchange counters on concourse A, the baggage reclaims area and the main terminal. Alternatively, if you decide to exchange some of your dollars for Thai Baht at the arrival airport, Suvarnabhumi Airport in Bangkok (BKK), you will find currency exchange counters at the arrivals hall, basement level at the baggage claim area.
  • When you arrive at BKK airport in Bangkok and have some time before your airport shuttle transfer, you can visit the Chang Massage and Spa and pamper yourself with an excellent massage, facials, pedicures, manicures and aromatherapy to help you relieve some stress after a long flight from SEA. You can also get these services at the Miracle Transit hotel situated at Concourse G.
  • Passengers with limited mobility arriving at BKK in Bangkok can utilize the special services that the airport offers, such as wheelchair services and extra assistance. However, you can only access these services upon request. If you want to make use of these services, you can call your airline in advance and inform them of the services you need.

Reviews of the top 5 airlines serving from Seattle to Bangkok

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Bangkok. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. 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 Seattle to Bangkok? 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.
8.9
STARLUX AirlinesOverall score based on 243 reviews
9.2Crew
8.7Food
8.9Entertainment
8.9Comfort
8.9Boarding
Airline reviews

Starlux was great service and awesome food and drinks👍🏼 will take starlux again for my next vacation👍🏼

10.0 ExcellentTony, Dec 2025
CRK - TPE
Read more STARLUX Airlines reviews

Starlux was great service and awesome food and drinks👍🏼 will take starlux again for my next vacation👍🏼

Loved the boarding process. All airlines should board from the back to the front. Very efficient. Food was excellent, crew were great, seats were spacious and comfortable and the entertainment screen was the best I have seen.

Flight cancelled due to inclement weather yet rival airline EVA Air with the same route departed 2 hours later and landed safely while our flight was cancelled and rescheduled for 36 hours later.

The staff in air and on land went above and beyond! I would definately recommend and we will fly Starlux again!

I need Starlux to respond to my complaint and issues for my flight.

Someon vomit during boarding. My seat was next to the vomit. I asked crew member to switch seat, but they said it was a full flight. I had my baby with me. My baby got sick after the flight. He was in the hospital for 2 days.

The airplane so clean and they have a nice crew

it they come out with resent movie and good food

The crew could have been kinder and less pushy. The premium economy seats don't have enough cushion. The seats are to hard and the flight became painful and uncomfortable after an hour of flying.

Aircraft is new and toilets are spacious, but toilets are quite filthy. They should clean more often. They have a long list of drink offer but are actually not available during meal. They said they’ll come back with them and you don’t get them until after dinner which means you eat your meals without any drinks if you were to get something that they don’t have on the cart. They are strict about removing headphones during take off and landing which is new to us since the movies did not get turned off. Instead, we we’re forced to watch their commercials during that time. We probably would fly with them again but not with the cost we spent. For the record, I work in tourism and travel a lot for inspections.

We were very impressed with the modern plane its amenities, as well as the services of flight attendants.

Everything was great, however the seats in the back are very small. Not as Comfortable as I would have liked.

The crew very accommodating and food too is good. Keep up the good work

Service in BKK was very good at answering our question about our canceled flight from Taipei to San Francisco. Did like the lead time about the canceled flight from Taipei to San Francisco and was not given the best options.

The crews are very efficient. Other airlines should learn from them when it comes to boarding and departing from the airplane. They also display efficiency in serving meals. They don't keep the aisles blocked for hours like some other airlines. The food is poor. Generally the food was unrecognizable and poorly prepared. The only thing that made it better than US flag carriers is that there was a fresh fruit bowl with each meal.

Very good service and food. Crew was professional and considerate. Cabin and restrooms were kept clean

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 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.

First trip from Tulsa to Houston by air. It went by quickly. I watched half a movie and continued the rest on the next flight. Staff was considerate and helpful.

The meals were sufficient and tasty considering it was air travel food. Water coffee and juices offered each time a meal came by and water distributed between meals. It was good service in my opinion. Plenty of movies to enjoy. May not be the one you want but plenty of older movies and plenty of current ones as well. I enjoyed the trip.

Flight was good and comfortable, even for long haul economy. No complaints.

Checking in via an alliance partner, even a foreign one should get TSA Precheck printed on your boarding pass. The paper copy issued by ANA didn’t show it. I couldn’t get my digital copy due to some technical issue arising because I checked in with ANA. The kiosks at SFO similarly threw an error. The only way I could have gotten a new copy of my boarding pass was from the UA counter and lines were nearly as long as TSA so I bit the bullet and went through the regular TSA line. If UA wants my business, they need to improve that process.

Suite lounge in Honolulu is very exclusive and boarding from the lounge into the plane is unique. First suites were huge and comfortable. Japanese meal is like a high end omakase meal. All the staff were very kind and provided sophisticated service. Fast Track upon landing was appreciated but not needed this time because immigration was so empty and easy.

I like the service very much. The food just okay but maybe different culture who like, who don't like.

Warm the bread. Movies: better choices to include Chinese movies options or some of the older winners of flim festival

Almost 6 hours of delay with over 12 gate changes. Flight was supposed to depart around 6 and instead depart after 12am. No accommodations were offered than some snacks closer to midnight when the crew was planning to throw away some snacks.

The crew was very nice and polite. They made sure everybody got their meal and drinks. Even the economy class had a very adequate leg room for someone that is over 6 foot tall.

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

Very bad. They don’t allow group people to sit together by blocking most of seats and opening only single seat during online checking in. . By doing so, they can rip off customers at the check-in counter by collecting extra money if we want to sit together in the same row.

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

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

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

They need to improve on how the plane lands cause it was not smooth at all.

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. :)

Staff was so nice and very helpful with directions aswell!

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

Very clean ,flight attendants very professional,nice , Boarding was very easy

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.

Coming back to America was a peaceful flight everyone and everything was perfect

I had a bad experience coming from America to Thailand. On my connecting flight my check in suitcase was not put on the departing aircraft, I received my suitcase 24 hours after arriving in Bangkok and when I open my luggage my hand swelled up. The next morning when I put on an outfit from my suitcase my face swelled up and became numb. My entire vacation was ruined it seems that some kind of chemical was sprayed into suitcase and ruined my clothes and got me sick. The staff at my hotel called the airline and spoke to someone and they told me to file a complaint and gave my a website to do so. I did not file a complaint I felt like it would have fell on death ears. I had to throw away my brand new vacation clothes and suitcase and I had the worst vacation ever due to this happening to me.

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.

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

Information on your arrival and departure airports