STL - BKK

฿17,564 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
฿37,054
Typical prices: ฿36,180-฿50,660
Multiple Airlines
Wed 28/2Sat 28/4
STL - BKK • 2 stops
Cheapest one-way flight
฿17,564
Typical prices: ฿19,742-฿25,282
Multiple Airlines
Thu 18/1
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 24% compared to booking last minute.
Insights
Insights
When to travel
February
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

Sun 28 Feb - Wed 28 Apr
Multiple Airlines Logo
07:35 - 23:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
27h 05m2 stops Charlotte Douglas Abu Dhabi Zayed Intl
Multiple Airlines Logo
21:00 - 18:04BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
33h 04m2 stops Abu Dhabi Zayed Intl Charlotte Douglas
฿37,054Multiple Airlines
Wed 10 Feb - Mon 22 Feb
Qatar Airways Logo
07:21 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
34h 19m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
20:35 - 19:27BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
35h 52m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿37,358Qatar Airways
Wed 10 Feb - Sun 21 Feb
Qatar Airways Logo
07:21 - 12:15STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
39h 54m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:00 - 20:22BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
31h 22m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿37,729Qatar Airways
Sun 14 Feb - Mon 1 Mar
Qatar Airways Logo
14:19 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
27h 21m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
20:35 - 22:09BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
38h 34m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿38,135Qatar Airways
Thu 11 Feb - Tue 2 Mar
Qatar Airways Logo
14:19 - 06:15STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
26h 56m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:00 - 19:27BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
30h 27m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿38,168Qatar Airways
Wed 13 Jan - Tue 26 Jan
Qatar Airways Logo
11:50 - 18:50STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
42h 00m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:00 - 14:56BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
49h 56m2 stops Doha Hamad Intl Seattle/Tacoma Intl
฿38,574Qatar Airways
Mon 1 Mar - Sat 6 Mar
Cathay Pacific Logo
07:31 - 00:15STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
27h 44m2 stops Chicago O'Hare Intl Hong Kong Intl
Cathay Pacific Logo
19:15 - 19:32BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
37h 17m2 stops Hong Kong Intl Chicago O'Hare Intl
฿39,013Cathay Pacific
Sun 14 Feb - Sat 27 Feb
Qatar Airways Logo
14:19 - 06:40STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
27h 21m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:00 - 22:09BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
33h 09m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿39,080Qatar Airways
Fri 12 Feb - Mon 1 Mar
Qatar Airways Logo
14:19 - 06:15STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
26h 56m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
20:35 - 22:09BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
38h 34m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿39,486Qatar Airways
Fri 12 Feb - Tue 2 Mar
Qatar Airways Logo
14:19 - 06:15STL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
26h 56m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
02:00 - 19:27BKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
30h 27m2 stops Doha Hamad Intl Chicago O'Hare Intl
฿39,520Qatar Airways
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 with more confidence.

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

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from St. Louis to Bangkok Suvarnabhumi Airport. It's 8% cheaper than the average day, while Saturday is the most expensive, with prices 16% higher.

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

•February is the cheapest month to fly from St. Louis to Bangkok Suvarnabhumi Airport at ฿35,027 return.
•December (฿63,907) and June (฿52,794) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 82% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights 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 24% 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

฿17,564
Beat the crowds with an average 34% drop in travellers.
The most popular month to fly with an average 51% increase in travellers.
One-way flight 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 answers about this route, including flight times, airports, airlines, and booking tips.

  • Which cabin classes can I book on flights from St. Louis to Bangkok Suvarnabhumi Airport?

    Only Economy class is available on flights from St. Louis to Bangkok Suvarnabhumi Airport.

  • 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 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 ฿36,180 to ฿50,660, with an average of ฿42,271 over the past 12 months. Anything below ฿36,180 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 8% above the ฿42,271 route average. Book 21 weeks before departure for the lowest fares.

  • 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 ฿18,871, which is 14% below the typical average for this route.

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

    Bangkok Suvarnabhumi Airport (BKK) hosts 5 major car rental companies, with daily rates starting from around ฿436 for economy cars. Top options include:

    • Drive Car Rental
    • Alamo
    • Sixt
    • Yesaway
    • Hertz

  • 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. Flexible dates can save you up to 21% on flights from St. Louis to Bangkok Suvarnabhumi Airport. Monday is the cheapest departure day at ฿38,979 return on average, while Saturday is the most expensive at ฿49,180, a difference of ฿10,201.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • 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.

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

    Some of the most popular sights in Bangkok Suvarnabhumi Airport are Victory Monument, Pratunam, and Siam Square. These are among the most viewed places in Bangkok Suvarnabhumi Airport on KAYAK.

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 and avoid flying on Saturday. On this route, Monday flights average ฿38,979, which is about ฿10,201 less than Saturday fares (21% 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 24% 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 February. Fares historically average ฿35,027 return in that month – typically ฿28,880 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
    • Suvarnabhumi Ville Airport Hotel
    • Siam Mandarina Bangkok Suvarnabhumi Airport Hotel (Free Shuttle)

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