St. Louis (STL) → Bangkok (BKK)
About St. Louis to Bangkok Flights
Discover the best flights from St. Louis to Bangkok, covering 14,071 km in approximately 18h 5m. St. Louis (STL) to Bangkok (BKK) is one of the major long-haul routes connecting United States and Thailand. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from St. Louis to Bangkok.
12-Month Price History
Flight prices from St. Louis to Bangkok vary significantly throughout the year. February typically offers the best deals with average prices around $2495, while July sees the highest prices, averaging $4208. Savvy travelers can save up to 41% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
132 days
For best prices
Booking Tips
For the best prices on St. Louis to Bangkok flights, we recommend booking 63 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
British Airways BA | $3670 | $13810 | $20700 |
United Airlines UA | $3910 | $11490 | $18530 |
American Airlines AA | $3950 | $12790 | $23370 |
Thai VietJet Air VZ | $4100 | $12520 | $18310 |
Thai Airways TG | $4100 | $15340 | $19200 |
Delta Air Lines DL | $4310 | $15190 | $22600 |
Air France AF | $4340 | $16490 | $23790 |
British Airways
BA
Economy
$3670
Business
$13810
First
$20700
United Airlines
UA
Economy
$3910
Business
$11490
First
$18530
American Airlines
AA
Economy
$3950
Business
$12790
First
$23370
Thai VietJet Air
VZ
Economy
$4100
Business
$12520
First
$18310
Thai Airways
TG
Economy
$4100
Business
$15340
First
$19200
Delta Air Lines
DL
Economy
$4310
Business
$15190
First
$22600
Air France
AF
Economy
$4340
Business
$16490
First
$23790
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
St. Louis → Bangkok
St. Louis Lambert International (STL) to Don Mueang International (DMK)
Distance: 14,049 km
Average price: $2870
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Frequently Asked Questions
How long is the flight from St. Louis to Bangkok?
The flight time from St. Louis (STL) to Bangkok (BKK) is approximately 18 hours and 5 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between St. Louis and Bangkok?
The aerial distance between St. Louis and Bangkok is 14,071 kilometers (8,743 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from St. Louis to Bangkok?
Several airlines operate flights between St. Louis and Bangkok, including Thai Airways, Thai VietJet Air, American Airlines and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from St. Louis to Bangkok?
Based on historical data, February typically offers the lowest airfares for flights from St. Louis to Bangkok. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Bangkok?
For the best prices on St. Louis to Bangkok flights, we recommend booking 157 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from St. Louis to Bangkok?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Thailand should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between St. Louis and Bangkok?
St. Louis operates on America/Chicago time zone, while Bangkok is in the Asia/Bangkok time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.