฿18,000 Cheap Flights from St. Louis (STL) to Bangkok (BKK)

View ฿18,000 flight on Mon, 7 Sept 2026Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Suvarnabhumi International Airport (BKK)

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Cheap Flights from St. Louis (STL) to Bangkok (BKK)

Prices were available within the past 7 days and start at ฿18,000 for one-way flights and ฿28,455 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 18 Sept - Tue, 29 Sept
STL
St. Louis
BKK
Bangkok
฿28,455 Return, found 5 days ago
฿28,455
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 18 Sept from St. Louis to Bangkok, returning Tue, 29 Sept, priced at ฿28,455 found 5 days ago
American Airlines
Fri, 18 Sept - Tue, 29 Sept
STL
St. Louis
BKK
Bangkok
฿31,210 Return, found 5 days ago
฿31,210
Return
found 5 days ago
Select American Airlines flight, departing Fri, 18 Sept from St. Louis to Bangkok, returning Tue, 29 Sept, priced at ฿31,210 found 5 days ago
American Airlines
Fri, 18 Sept - Tue, 29 Sept
STL
St. Louis
BKK
Bangkok
฿33,085 Return, found 5 days ago
฿33,085
Return
found 5 days ago
Select American Airlines flight, departing Fri, 18 Sept from St. Louis to Bangkok, returning Tue, 29 Sept, priced at ฿33,085 found 5 days ago
United
Fri, 18 Sept - Tue, 29 Sept
STL
St. Louis
BKK
Bangkok
฿34,975 Return, found 5 days ago
฿34,975
Return
found 5 days ago
Select United flight, departing Fri, 18 Sept from St. Louis to Bangkok, returning Tue, 29 Sept, priced at ฿34,975 found 5 days ago
All Nippon Airways
Sun, 26 Apr - Tue, 19 May
STL
St. Louis
BKK
Bangkok
฿35,990 Return, found 6 days ago
฿35,990
Return
found 6 days ago
Select All Nippon Airways flight, departing Sun, 26 Apr from St. Louis to Bangkok, returning Tue, 19 May, priced at ฿35,990 found 6 days ago
Delta
Mon, 7 Sept - Sun, 13 Sept
STL
St. Louis
BKK
Bangkok
฿36,615 Return, found 5 days ago
฿36,615
Return
found 5 days ago
Select Delta flight, departing Mon, 7 Sept from St. Louis to Bangkok, returning Sun, 13 Sept, priced at ฿36,615 found 5 days ago
Cathay Pacific
Mon, 7 Sept - Sun, 13 Sept
STL
St. Louis
BKK
Bangkok
฿36,885 Return, found 5 days ago
฿36,885
Return
found 5 days ago
Select Cathay Pacific flight, departing Mon, 7 Sept from St. Louis to Bangkok, returning Sun, 13 Sept, priced at ฿36,885 found 5 days ago
Japan Airlines
Tue, 1 Sept - Sun, 31 Jan
STL
St. Louis
BKK
Bangkok
฿38,010 Return, found 10 hours ago
฿38,010
Return
found 10 hours ago
Select Japan Airlines flight, departing Tue, 1 Sept from St. Louis to Bangkok, returning Sun, 31 Jan, priced at ฿38,010 found 10 hours ago
Qatar Airways
Fri, 18 Sept - Tue, 29 Sept
STL
St. Louis
BKK
Bangkok
฿40,135 Return, found 5 days ago
฿40,135
Return
found 5 days ago
Select Qatar Airways flight, departing Fri, 18 Sept from St. Louis to Bangkok, returning Tue, 29 Sept, priced at ฿40,135 found 5 days ago
American Airlines
Sat, 1 Aug - Wed, 30 Sept
STL
St. Louis
BKK
Bangkok
฿42,815 Return, found 10 hours ago
฿42,815
Return
found 10 hours ago
Select American Airlines flight, departing Sat, 1 Aug from St. Louis to Bangkok, returning Wed, 30 Sept, priced at ฿42,815 found 10 hours ago

Frequently asked questions

How much is a flight from STL to BKK?
Based on airfares available within the last 7 days on Expedia for flights departing within the next year, round-trip flights from Lambert Field to Suvarnabhumi Airport start from ฿28,455. Make your booking today to get the best price for your adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from STL to Suvarnabhumi Airport?
Each air carrier has its own set of terms and conditions. If you decide to cancel your trip, head to our Customer Service Portal.
How do I find cheap flights from STL to Suvarnabhumi Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for STL to Suvarnabhumi Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from STL to Suvarnabhumi Intl. Airport (BKK)?
With a flight distance of 14,100 kilometres between St. Louis Lambert International Airport and Bangkok Airport, this is a long trip. Make sure you drink lots of water and go for a short walk down the aisle every so often.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Suvarnabhumi Intl. Airport (BKK)?
Right now, no airlines offer direct flights from Lambert Field to Suvarnabhumi Intl. Airport (BKK). You'll need to book a flight with one or more stops. To score the best connections and price, lock in your airfare well in advance.
Are STL to BKK flight tickets cheaper when they're purchased at the last minute?
Fares from St. Louis Lambert International Airport to BKK are available up to a year prior to departure on Expedia. And although you may occasionally pick up great last-minute deal, it's not something you should bank on. Also, booking your flights well in advance means you'll have more choices — and you can avoid landing the dreaded middle seat! We regularly update our fares to make sure you get the biggest bargains, so check back often for all the latest specials.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Suvarnabhumi Intl.
Airlines serving
Air Canada, All Nippon Airways, Cathay Pacific, Delta, Japan Airlines, KLM, Korean Air, Lufthansa, Qantas Airways, United
Return price
฿28,455
Distance
13988 km

Book with confidence

Perfect flights from St. Louis to Bangkok

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from St. Louis to Bangkok. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Lambert-St. Louis Intl. to Suvarnabhumi Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿18,000 and roundtrip prices from ฿28,455. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Suvarnabhumi Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Bangkok.
Perfect flights from St. Louis to Bangkok
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