$428 Cheap United flights from Seattle to Bangkok (SEA to BKK)

Find The Best Day To Fly from Seattle to Bangkok

Amazing United SEA to BKK Flight Deals

The cheapest flights to Suvarnabhumi Intl. found within the past 7 days were $703 round trip and $428 one way. Prices and availability subject to change. Additional terms may apply.

Sun, Aug 2 - Sun, Aug 23
SEA
Seattle
BKK
Bangkok
$703 Roundtrip, found 2 days ago
$703
Roundtrip
found 2 days ago
Select United flight, departing Sun, Aug 2 from Seattle to Bangkok, returning Sun, Aug 23, priced at $703 found 2 days ago
Mon, Aug 3 - Mon, Aug 24
SEA
Seattle
BKK
Bangkok
$710 Roundtrip, found 10 hours ago
$710
Roundtrip
found 10 hours ago
Select United flight, departing Mon, Aug 3 from Seattle to Bangkok, returning Mon, Aug 24, priced at $710 found 10 hours ago

BKK From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
AETAS lumpini

AETAS lumpini

5 out of 5
Save 100% on your flight
Price was $1,707, price is now $961 per person
$961
per person
May 3 - May 10
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Bangkok (BKK)
Centre Point Hotel Chidlom

Centre Point Hotel Chidlom

4 out of 5
Price was $1,856, price is now $963 per person
$963
per person
May 3 - May 10
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Bangkok (BKK)
Night Hotel Bangkok - Sukhumvit 15

Night Hotel Bangkok - Sukhumvit 15

4.5 out of 5
Save 100% on your flight
Price was $1,769, price is now $975 per person
$975
per person
May 3 - May 10
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to Bangkok (BKK)
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Frequently asked questions

Can I catch a flight from Sea-Tac Airport to Suvarnabhumi Airport right now?
Be sure to check out our Covid-19 Travel Advisor to learn if there are any present quarantine requirements or travel advice reports in effect in Suvarnabhumi Airport when flying from SEA.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Bangkok Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Seattle SEA to Bangkok BKK 

To find the best deals on flights to Seattle from Bangkok with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Seattle SEA to Bangkok BKK with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $703 to $710, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Seattle SEA to Bangkok BKK 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Seattle to Bangkok costs from $428. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Bangkok BKK from  Seattle SEA with United 

To find a cheap United flight from Seattle SEA to Bangkok BKK, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Seattle SEA to Bangkok BKK 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as August, or if you book a flight with a stopover. 

 

Find nonstop flights from Seattle SEA to Bangkok BKK with United 

If you’re keen to be on Bangkok soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Seattle SEA to Bangkok BKK 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Bangkok BKK from  Seattle SEA with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Bangkok

Hyatt Regency Bangkok Suvarnabhumi Airport

Hyatt Regency Bangkok Suvarnabhumi Airport

4 out of 5
999 Suvarnabhumi Airport Hotel Bang Phli Samut Prakan
A full-service spa, 4 restaurants, and an outdoor pool are all featured at this hotel. There's fun for all ages with a children's pool and a playground, and ...
8.6/10 Excellent! (1,033 reviews)
Very spacious and clean. Excellent customer service from front desk to shuttle bus.

Reviewed on Feb 18, 2026

Hyatt Regency Bangkok Suvarnabhumi Airport
Siam Mandarina Bangkok Suvarnabhumi Airport Hotel (Free Shuttle)

Siam Mandarina Bangkok Suvarnabhumi Airport Hotel (Free Shuttle)

5 out of 5
99 Moo 6, Kingkaew Road, Rachateva Bang Phli Samut Prakan
A full-service spa, an outdoor pool, and a restaurant are all featured at this luxury hotel. Traveling on business? Take advantage of the business center, free ...
8.6/10 Excellent! (2,504 reviews)
Beautiful place but only used for overnight stay between flights. Within 5 to 10 minutes from airport. Free shuttle but only every hour from airport. Timing worked great for us

Reviewed on Feb 20, 2026

Siam Mandarina Bangkok Suvarnabhumi Airport Hotel (Free Shuttle)
Grande Centre Point Sukhumvit 55

Grande Centre Point Sukhumvit 55

5 out of 5
300 Sukhumvit Soi 55 (Thonglor) Bangkok
This luxury hotel features a full-service spa, hot springs, and a restaurant. Traveling on business? Take advantage of the business center, free WiFi in public ...
9.4/10 Exceptional! (1,522 reviews)
Wonderful. We decided to come back to the hotel. Absolutely the best. You must try the onsen.

Reviewed on Feb 14, 2026

Grande Centre Point Sukhumvit 55
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.