SEA - BKK

$429 Find Cheap Flights from Seattle to Bangkok - Compare and Save

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 7/12. 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

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Everything you should know

Cheapest round-trip
$811
Typical prices: $676-$841
Singapore Airlines
Sun 9/27Wed 10/14
SEA - BKK • 1 stop
Cheapest one-way
$429
Typical prices: $383-$493
Korean Air
Sun 7/12
SEA - BKK • 2 stops
Top airlines
Cheapest • from $811 (round-trip)
Best reviews • 8.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Bangkok. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $997 (round-trip)
Shortest trip • 19h 57m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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

Sun, Sep 27 - Wed, Oct 14
Singapore Airlines Logo
10:15 am - 2:15 pm
SEA
-
BKK
38h 00m
1 stop
Singapore Airlines Logo
9:15 pm - 8:45 am
BKK
-
SEA
25h 30m
1 stop
$811Singapore Airlines
Thu, Oct 15 - Thu, Oct 29
Singapore Airlines Logo
10:15 am - 5:15 pm
SEA
-
BKK
41h 00m
1 stop
Singapore Airlines Logo
9:35 am - 8:10 am
BKK
-
SEA
36h 35m
1 stop
$814Singapore Airlines
Thu, Nov 12 - Tue, Feb 9
Philippine Airlines Logo
9:30 pm - 12:05 pm
SEA
-
BKK
23h 35m
1 stop
Philippine Airlines Logo
10:50 pm - 6:30 pm
BKK
-
SEA
34h 40m
1 stop
$817Philippine Airlines
Fri, Jan 1 - Mon, Jan 18
Singapore Airlines Logo
8:45 am - 2:35 pm
SEA
-
BKK
38h 50m
1 stop
Singapore Airlines Logo
12:00 pm - 7:10 am
BKK
-
SEA
34h 10m
1 stop
$818Singapore Airlines
Tue, Sep 8 - Sun, Sep 20
Singapore Airlines Logo
10:15 am - 8:05 am
SEA
-
BKK
31h 50m
1 stop
Singapore Airlines Logo
8:15 pm - 8:45 am
BKK
-
SEA
50h 30m
1 stop
$820Singapore Airlines
Tue, Sep 22 - Sat, Sep 26
Singapore Airlines Logo
10:15 am - 11:00 am
SEA
-
BKK
34h 45m
1 stop
Singapore Airlines Logo
9:20 am - 8:45 am
BKK
-
SEA
37h 25m
1 stop
$821Singapore Airlines
Sat, Oct 31 - Sun, Nov 8
Singapore Airlines Logo
9:45 am - 12:20 pm
SEA
-
BKK
36h 35m
1 stop
Singapore Airlines Logo
8:00 pm - 7:10 am
BKK
-
SEA
50h 10m
1 stop
$827Singapore Airlines
Sun, Nov 1 - Sun, Nov 8
Condor Logo
4:15 pm - 1:20 pm
SEA
-
BKK
30h 05m
1 stop
Condor Logo
7:55 pm - 3:55 pm
BKK
-
SEA
35h 00m
2 stops
$828Condor
Wed, Nov 18 - Thu, Nov 26
Singapore Airlines Logo
8:45 am - 2:35 pm
SEA
-
BKK
38h 50m
1 stop
Singapore Airlines Logo
3:50 pm - 7:10 am
BKK
-
SEA
30h 20m
1 stop
$829Singapore Airlines
Mon, Aug 3 - Mon, Aug 17
Korean Air Logo
7:20 am - 11:35 pm
SEA
-
BKK
26h 15m
2 stops
Korean Air Logo
9:50 am - 9:59 pm
BKK
-
SEA
26h 09m
2 stops
$830Korean Air
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.

How much is a round-trip flight from Seattle to Bangkok Suvarnabhumi Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Bangkok Suvarnabhumi Airport departing in September.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Bangkok Suvarnabhumi Airport, 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 Suvarnabhumi Airport is October, where tickets cost $737 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,282 and $1,221 respectively.

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

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 Suvarnabhumi Airport, 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 Suvarnabhumi Airport, 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

Low seasonMay
Cheapest flight$429
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Seattle to Bangkok

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 Seattle to Bangkok flights

  • What is the cheapest flight from Seattle to Bangkok Suvarnabhumi Airport?

    In the last 5 days, the lowest price for a flight from Seattle to Bangkok Suvarnabhumi Airport was $430 for a one-way ticket and $811 for a round-trip.

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

    Yes, you’ll need a passport to travel to Bangkok from Seattle.

  • 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.

  • Which is the best airline for flights from Seattle to Bangkok, STARLUX Airlines or EVA Air?

    The two airlines most popular with KAYAK users for flights from Seattle to Bangkok are STARLUX Airlines and EVA Air. With an average price for the route of $922 and an overall rating of 8.9, STARLUX Airlines is the most popular choice. EVA Air is also a great choice for the route, with an average price of $895 and an overall rating of 8.5.

  • 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. Booking your flights between Seattle and BKK can sometimes prove cheaper using this method.

  • 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.

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 354 reviews
8.8Entertainment
8.9Boarding
9.2Crew
8.9Comfort
8.7Food
Airline reviews

STARLUX Airlines has great staff and crew. Well organized for quick boarding of such a large plane out of Phoenix to Taipei. Interior of the aircraft was that of deluxe aircraft.

10.0 ExcellentAndrew, Jun 2026
PHX - TPE
Read more STARLUX Airlines reviews

STARLUX Airlines has great staff and crew. Well organized for quick boarding of such a large plane out of Phoenix to Taipei. Interior of the aircraft was that of deluxe aircraft.

Hostesses were very nice I am disappointed that I paid extra 900$for premium economy which wasn't much upgraded from regular economy, I have wasted my money on this trip 😫

amazing and great food. everything was smooth from start to finished

love this boutique luxury airline. crew was nice and attentive. Lounge is too small , i think they should have more area for relaxing and lounging not just to sit and eat .. feels like a cafeteria more than a lounge. overall i enjoy it. food on the plane LAX to Teipei should inprove a bit. no flavor and more drinks pls

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!

Overall it’s good . However the food quality can be improved .

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

Serve me a meal, I fell asleep during the flight. So they passed me twice.

Everything was smooth and professional. They could improve the raw vegan meal with fresher offerings, but otherwise they are now my favorite way to fly to Asia.

They forced me to check a bag. When Kayak sold me these tickets I was not informed of carry on baggage weight limits.

The food was great; the attendants were pleasant. Waiting to onboard felt stressful, as passengers who had connecting flights at SEA had to be verified again for two things before getting a real boarding pass: passport and carry-on luggage weight. The boarding pass issued by another airline (i.e., the first leg of my trip) did not count. The S terminal at SEA was barren, with lots of sensory overloads because every airline was repeatedly broadcasting long lists of names of passengers who had not gone through that verification process. The carry-on luggage weight check seemed futile to me. I saw a woman who opened her over-weight suitcase to move some items into her shoulder bag. She still boarded with two huge bags with her. I assume this check is an endeavor of ensuring fairness of the overhead bin space or optimizing fuel efficiency when gas price is through the roof, but I don't know if either goal is achieved. Nonetheless I respect the crew's dedication to the SOP.

The crew need to be more friendly it seem everything such a rush situation during dinner and breakfast. Smiles to the passenger go such a long way just the service from Seattle to Taipei, service from Taipei to Bangkok were great more pleasant the flight attendant from Thailand she was very nice, as far as entertainment were amazing , wiffi connection was incredible great, I will be able to charged my phone from Seattle to Taipei and from taipei to Bangkok I won’t be able to do so flight attendant told me that because I don’t have the original iPhone charger connection has nothing to do what type of charger I have so she said there is nothing she can do about it. Foods : from Seattle to Taipei were ok no flavor , from Taipei to Bangkok I have chicken teriyaki the rice is overcooked all the flavor stuck on the aluminum wraps , breakfast the congee was on point and delicious. Will I recommend anyone to fly with Eva air go for it so you can experience yourself for myself I won’t fly with them again I’m gonna stick with Singapore airlines instead.

Never went. Got rescheduled with Phillipine Airlines to Bali, which was fine.

The flight from SEA to Taipei was on a Boeing 787-10. Economy seats were unacceptably cramped and the seats themselves were old and lacking cushion. I'm only 5'3" and couldn't cross my legs as my knees were up against the seat in front of me! I could not get WiFi to work most of the time on both flights and crew were invisible except to serve meals. The onboard entertainment also did not work reliably and was very hard to hear through the provided earbuds. The Asian vegetarian meals were interesting. I hope they can provide a fully vegan option though these meals seemed to be already. I appreciate their providing these meals options for vegans. I don't think I'll fly a 787-10 if I can help it. It was the definition of a sardine can in Economy.

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 ⭐️⭐️⭐️⭐️⭐️.

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.

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

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

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

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 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. :)

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!

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

Lovely service and excellent food and entertainment! I couldn’t have been more happy flying with air China

I had selected seats together for my family of three when I first booked my tickets in February. However, I realized only when I checked in at the airport that the seats I had selected were no longer assigned to us and we were completely scattered across three different middle seats instead of being seated together! After requesting the Singapore staff to have us seated together on a full flight, they managed to find something but it was right next to the rest rooms and the whole journey of 15+ hours was really unpleasant. They said that the seat selection isn't locked and the airline can reallocate the seats anytime. No one ever told us this and it was a terribly unpleasant surprise. Will avoid Kayak/underpricer and Singapore in future

The friendliness of the attendants, and the quality of the service.

Flight attendants were awesome! Very helpful and patients. Some food were good but maybe not serving fish that kinda make the whole aircraft smell fishy. The “fried pork” was tasty but too much skin so it doesnt taste that great.

Very concerned with guest comforts going out of their way to accommodate special dietary needs when the guests hadn’t pre-ordered.

No frills airline with minimal leg room and no entertainment

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

The seats were more narrow than at other lines. Food was mediocre (economy class)

I was traveling with my 3 minor children, one leg I was seated two aisles behind them. On the longest leg I would have preferred sitting across the aisle from them, not behind. My youngest is 4yos. I understand airplane seating configurations are not the airlines problem but seating the one adult with a reservation apart from the minors was very difficult.

Left hr late & arrived 1hr late luggage was slow to be offloaded! The flight crew & food were good! Movie selection was ok!

Airport lounge for business class is too crowded and not comfortable. Poor foods and facilities. Boarding was delayed. A lot of coughing people in the flight even in the business class, which indicated poor screening and health risks.

Humm, I should have known that the seat I peaked on my flight from Inchon to Manila was designed for a toddler or very small person.

The staff hold my luggage to steel and exchange my stub, i was very disappointed.

Kayak uses scammer sites to steal money from their victims.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

When one asks for water because they are dehydrated, bring more then a sip or two in a small cup. Bring them a whole bottle.

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

It was all perfect and very pleasant for such long flights

The boarding process was good. The toilet could be better maintained.

It’s wonderful service aboard. Delayed for departure but arrival in Korea went so well.

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

Information on your arrival and departure airports