STL - BKK

฿16,853 Find Cheap Flights from St. Louis to Bangkok – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
฿33,971
Typical prices: ฿34,437-฿48,131
Multiple Airlines
Sun 28/10Thu 15/11
STL - BKK • 2 stops
Cheapest one-way flight
฿16,853
Typical prices: ฿18,139-฿25,007
Multiple Airlines
Sun 30/9
STL - BKK • 2 stops
When to book
21 weeks
in advance
Our data shows that travellers who book at least 21 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 17% price drop
February
Most popular
Good to know
+1
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Bangkok Suvarnabhumi Airport!
Flight Deals
Booking Insights
Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from St. Louis to Suvarnabhumi

Wed 28 Oct - Sun 15 Nov
Multiple Airlines Logo
07:02 - 12:35STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
41h 33m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
17:40 - 23:59BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
43h 19m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl
฿33,971Multiple Airlines
Sat 10 Oct - Tue 10 Nov
Multiple Airlines Logo
06:02 - 12:00STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
41h 58m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
13:45 - 14:25BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
37h 40m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl
฿34,202Multiple Airlines
Tue 22 Sep - Wed 7 Oct
Multiple Airlines Logo
07:27 - 23:55STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
28h 28m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
15:55 - 20:57BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
41h 02m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl
฿34,301Multiple Airlines
Wed 10 Feb - Mon 22 Feb
Qatar Airways Logo
11:25 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
30h 15m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
18:55 - 21:08BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
39h 13m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿34,665Qatar Airways
Wed 10 Feb - Mon 22 Feb
Qatar Airways Logo
13:40 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
28h 00m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
18:55 - 23:58BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
42h 03m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿34,731Qatar Airways
Tue 22 Sep - Tue 6 Oct
Qatar Airways Logo
11:01 - 06:20STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
31h 19m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:30 - 20:57BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
30h 27m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿34,830Qatar Airways
Sun 28 Feb - Tue 27 Apr
Qatar Airways Logo
07:29 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
34h 11m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:30 - 22:17BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
31h 47m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿34,962Qatar Airways
Tue 22 Sep - Tue 6 Oct
Qatar Airways Logo
07:27 - 12:55STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
41h 28m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
03:00 - 20:57BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
29h 57m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿35,028Qatar Airways
Wed 20 Jan - Tue 23 Feb
Qatar Airways Logo
13:40 - 13:05STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
34h 25m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
03:00 - 21:08BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
31h 08m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿35,128Qatar Airways
Sun 7 Mar - Fri 12 Mar
Multiple Airlines Logo
15:24 - 12:35STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
32h 11m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
13:45 - 23:44BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
22h 59m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl
฿35,194Multiple Airlines
Booking Insights

Price, demand, and travel trends for St. Louis to Bangkok Suvarnabhumi Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from St. Louis to Bangkok Suvarnabhumi Airport with more confidence.

What's the cheapest day of the week to fly from St. Louis to Bangkok Suvarnabhumi Airport?

Monday is the cheapest day of the week to fly from St. Louis to Bangkok Suvarnabhumi Airport and is 9% cheaper than the average day. Friday is the most expensive day with flight prices 18% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from St. Louis to Bangkok Suvarnabhumi Airport?

  • September is the cheapest month to fly from St. Louis to Bangkok Suvarnabhumi Airport at ฿33,343 return.
  • December (฿57,334) and June (฿52,212) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 71% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from St. Louis to Bangkok Suvarnabhumi Airport the cheapest?

Flights from St. Louis to Bangkok Suvarnabhumi Airport are cheapest 21 weeks before departure. Booking in this window typically costs about 26% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for St. Louis to Bangkok Suvarnabhumi Airport flights

Low season

October

Cheapest flight

฿16,853
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flights from St. Louis to Bangkok Suvarnabhumi Airport

When to book flights from St. Louis to Suvarnabhumi

Are your dates flexible? Find out the best times to travel from St. Louis to Suvarnabhumi based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your St. Louis to Bangkok Suvarnabhumi Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from St. Louis to Bangkok Suvarnabhumi Airport?

    Flights from St. Louis to Bangkok Suvarnabhumi Airport usually depart from Lambert-St Louis (STL) and arrive at Bangkok Suvarnabhumi (BKK).

  • Can I save money by using flexible dates for flights from St. Louis to Bangkok Suvarnabhumi Airport?

    Yes. Being flexible with your travel dates can save you up to 24% on the St. Louis to Bangkok Suvarnabhumi Airport route. Monday is the cheapest departure day at ฿36,846 return on average, while Friday is the most expensive at ฿48,048, a difference of ฿11,203. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Bangkok Suvarnabhumi Airport?

    Some of the most popular sights in Bangkok Suvarnabhumi Airport are Victory Monument, Thammasat University, and Centralworld. These are among the most viewed places in Bangkok Suvarnabhumi Airport on KAYAK.

  • How expensive are last-minute St. Louis to Bangkok Suvarnabhumi Airport flights?

    Last-minute fares on this route (booked within 2 weeks of departure) run 10% above the route average of ฿40,410. Book 21 weeks before departure for the lowest fares.

  • Do I need a passport to fly from St. Louis to Bangkok Suvarnabhumi Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from St. Louis to Bangkok Suvarnabhumi Airport looking right now?

    One-way fares from St. Louis to Bangkok Suvarnabhumi Airport are currently lower than usual. Average one-way flight prices are about ฿18,099, which is 16% below the typical average for this route.

  • What is the time difference between St. Louis and Bangkok Suvarnabhumi Airport?

    Bangkok Suvarnabhumi Airport is 12 hours ahead of St. Louis (Indochina Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which car hire options are available at Bangkok Suvarnabhumi Airport (BKK)?

    Bangkok Suvarnabhumi Airport (BKK) hosts 5 major car hire companies, with daily rates starting from around ฿443 for economy cars. Top options include:
    • Drive Car Rental
    • Alamo
    • Sixt
    • Yesaway
    • Hertz

  • How much should I expect to pay for a St. Louis to Bangkok Suvarnabhumi Airport flight?

    Return flights from St. Louis to Bangkok Suvarnabhumi Airport range from ฿34,437 to ฿48,131, with an average of ฿40,410 over the past 12 months. Anything below ฿34,437 counts as a good deal.

Your guide to booking St. Louis to Bangkok Suvarnabhumi Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure instead of Friday. On this route, Monday flights average ฿36,846 – about ฿11,203 less than Friday (23% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 21 weeks before you fly. On this route, that window historically saves about 26% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your St. Louis to Bangkok Suvarnabhumi Airport trip for September. Fares historically average ฿33,343 return in that month – typically ฿23,991 less than the most expensive month, which is December (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Bangkok Suvarnabhumi Airport.
    - Regency Bangkok Suvarnabhumi Airpor
    - Siam Mandarina Bangkok Suvarnabhumi Airport Hotel (Free Shuttle)
    - Suvarnabhumi Ville Airport Hotel

More options for your flight from St. Louis to Suvarnabhumi

Complete your trip to Bangkok with a hotel stay or car hire

Car rentals in Bangkok
Hotels in Bangkok