$344 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 8/12. 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
$637
Overall average: $862
Korean Air
dom. 5/3mié. 5/13
SEA - BKK • 1 stop
Cheapest one-way
$344
Typical prices: $345-$402
Philippine Airlines
mié. 8/12
SEA - BKK • 1 stop
Top airlines
Cheapest • from $637 (round-trip)
Best reviews • 9.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
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

dom., may. 3 - mié., may. 13
Korean Air Logo
12:50 pm - 1:35 pm
SEA
-
BKK
34h 45m
1 stop
Korean Air Logo
9:40 pm - 10:40 am
BKK
-
SEA
27h 00m
1 stop
$637Korean Air
jue., abr. 23 - mié., may. 6
Multiple Airlines Logo
12:50 pm - 11:35 pm
SEA
-
BKK
20h 45m
1 stop
Multiple Airlines Logo
1:20 am - 10:40 am
BKK
-
SEA
23h 20m
1 stop
$643Multiple Airlines
jue., abr. 30 - dom., may. 17
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m
1 stop
$653Asiana Airlines
mié., ago. 19 - mié., sep. 9
Philippine Airlines Logo
11:10 pm - 6:30 pm
SEA
-
BKK
29h 20m
1 stop
Philippine Airlines Logo
7:30 pm - 8:05 pm
BKK
-
SEA
38h 35m
1 stop
$660Philippine Airlines
mar., sep. 8 - mar., sep. 15
Philippine Airlines Logo
11:10 pm - 6:30 pm
SEA
-
BKK
29h 20m
1 stop
Philippine Airlines Logo
7:30 pm - 8:05 pm
BKK
-
SEA
38h 35m
1 stop
$661Philippine Airlines
jue., abr. 30 - dom., may. 3
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m
1 stop
$663Asiana Airlines
mar., ago. 25 - dom., sep. 6
Asiana Airlines Logo
12:55 am - 10:40 am
SEA
-
BKK
19h 45m
1 stop
Asiana Airlines Logo
1:20 am - 2:55 pm
BKK
-
SEA
27h 35m
1 stop
$664Asiana Airlines
dom., abr. 26 - lun., jun. 22
Asiana Airlines Logo
12:55 am - 11:20 pm
SEA
-
BKK
32h 25m
1 stop
Asiana Airlines Logo
11:45 am - 2:55 pm
BKK
-
SEA
17h 10m
1 stop
$665Asiana Airlines
jue., sep. 3 - dom., sep. 20
Singapore Airlines Logo
10:15 am - 2:15 pm
SEA
-
BKK
38h 00m
1 stop
Singapore Airlines Logo
3:30 pm - 9:51 am
BKK
-
SEA
32h 21m
2 stops
$674Singapore Airlines
dom., ago. 23 - dom., ago. 30
Singapore Airlines Logo
10:15 am - 12:20 pm
SEA
-
BKK
36h 05m
1 stop
Singapore Airlines Logo
3:30 pm - 9:51 am
BKK
-
SEA
32h 21m
2 stops
$675Singapore 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.

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 $739 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,216 and $1,195 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Cheapest flight$344
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 $344 for a one-way ticket and $637 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.
9.0
STARLUX AirlinesOverall score based on 292 reviews
8.9Comfort
9.2Crew
9.0Boarding
8.7Food
8.8Entertainment
Airline reviews

more new movies and the blockbuster movies that everyone likes

10.0 ExcellentMichael, Mar 2026
BKK - TPE
Read more STARLUX Airlines reviews

more new movies and the blockbuster movies that everyone likes

Great airline. Kind staff, before m, during, and after the flight. They Directed you the whole way. Even when I arrived at my transfer destination, flight attendants guided passengers on which direction to go. I would definitely fly STARLUX again.

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

Leg room was great. Friendly crew. Food is great. Crew always kept the toilet clean.

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

Business Class is exceptional, from the lie flat seats to the wide range of food on board. Can’t wait for our next journey with Starlux!

Th tray was dirty when pulled it out. Still oily and food stains can clearly see last trip cleaner did not clean well. The toilet sink water did not drain quickly enough.

Majority of the movie entertainment loaded in the aircraft were quite old.

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

Passengers were confused and freaking out coz the flight information wasn’t showing on the board that was running with all the departing flights. B9 gate was still showing Cathay Pacific bound for HK 15:50 was on until 22:07. STARLUX staff cameater but didn’t let the passengers go in to pre departure area until 22:45 for the 23:30 boarding time

Amazing customer service. BUT!! It would be nice if the flight attendants SMILE a little more, I know they are doing their job, but it is importantly to smile back and be warm to passengers. Nobody is trying to hit on them, it’s just being polite. So, please Taiwanese flight attendants: SMILE MORE WHEN YOU INTERACT WITH PAYING CUSTOMERS

It was easy going check in was easy and pretty fast entertainment was up to date on movies and food was ok

Premium Economy seats were more comfortable than other airlines I have recently been on. Great staff. Food was unremarkable.

From checking at the airport to end of flights, attentive and caring personnel, comfortable seating, great food. I plan on using EVA again. Thank you, all.

Very nice, I feel I got good value for the price.

Amazing one of the best airlines i have ever traveled with. I live with medical issues called psoriatic arthritis and was in pain on the flight. The flight crew made sure I had fresh ice pack ever hour. Going above an beyond with service and care ⭐️⭐️⭐️⭐️⭐️.

Certain flight crew member were rude and short with me when I asked questions.

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

The crew are amazing. Very professional, polite, kind, and accommodating.

The crew was very professional and friendly. Although there was a water leak from panel above, the crew was trying to mitigate the consequence. We are happy with its service and the value offered. We will definitely take China Airlines again.

Well, we upgraded and on a 14 hour flight not sure how we would tolerate it otherwise. The upgrades are ridiculously expensive and even with empty seats even in first class it was difficult to upgrade. Probably won’t fly China Air again due to this. The attendants tho were much better than the airlines in the states and there attentiveness and care for your comfort far exceeds other airlines in the states.

Flight attendants. Food, entertainment and most of all, be on time.

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 ran out of the second choice of food was stuck with fish

No frills airline with minimal leg room and no entertainment

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

a completely full flight - felt quite carmped in, despite being on the window seat. Meal served could better. Surely different from pre-covid trips I used to take to and from Bangkok.

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

I am thankful that I was able to fly using Asiana

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

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

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

Information on your arrival and departure airports