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Cheap flights from St. Louis to Bangkok from $431

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bangkok departing on 4/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Bangkok

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:00 am - 6:30 am
STL
-
BKK
34h 30m
2 stops
Multiple Airlines Logo
9:00 pm - 1:22 pm
BKK
-
STL
28h 22m
2 stops
$973Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
7:00 am - 6:45 am
STL
-
BKK
35h 45m
2 stops
Multiple Airlines Logo
9:00 pm - 7:21 pm
BKK
-
STL
34h 21m
2 stops
$975Multiple Airlines
Wed, Apr 29 - Wed, May 20
Multiple Airlines Logo
7:00 am - 11:50 pm
STL
-
BKK
28h 50m
2 stops
Multiple Airlines Logo
3:15 am - 8:30 pm
BKK
-
STL
29h 15m
2 stops
$987Multiple Airlines
Fri, May 1 - Tue, Jun 30
Multiple Airlines Logo
4:18 pm - 11:50 am
STL
-
BKK
31h 32m
2 stops
Multiple Airlines Logo
2:40 pm - 5:54 pm
BKK
-
STL
40h 14m
2 stops
$1,008Multiple Airlines
Thu, Aug 20 - Wed, Nov 18
Multiple Airlines Logo
7:00 am - 6:45 am
STL
-
BKK
35h 45m
2 stops
Multiple Airlines Logo
8:50 pm - 4:41 pm
BKK
-
STL
31h 51m
2 stops
$1,035Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Qatar Airways Logo
12:27 pm - 7:05 am
STL
-
BKK
30h 38m
2 stops
Qatar Airways Logo
2:05 am - 7:33 pm
BKK
-
STL
29h 28m
2 stops
$1,039Qatar Airways
Sun, Apr 19 - Tue, Apr 28
Qatar Airways Logo
4:18 pm - 7:15 am
STL
-
BKK
26h 57m
2 stops
Qatar Airways Logo
9:05 pm - 7:14 pm
BKK
-
STL
34h 09m
2 stops
$1,041Qatar Airways
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
7:05 am - 11:50 pm
STL
-
BKK
28h 45m
2 stops
Multiple Airlines Logo
3:55 pm - 4:41 pm
BKK
-
STL
36h 46m
2 stops
$1,056Multiple Airlines
Sat, May 2 - Sat, May 9
Qatar Airways Logo
2:33 pm - 7:05 am
STL
-
BKK
28h 32m
2 stops
Qatar Airways Logo
1:45 am - 10:17 pm
BKK
-
STL
32h 32m
2 stops
$1,073Qatar Airways
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
6:00 am - 6:45 am
STL
-
BKK
36h 45m
2 stops
Multiple Airlines Logo
3:15 am - 7:21 pm
BKK
-
STL
28h 06m
2 stops
$1,104Multiple Airlines
Sat, May 23 - Tue, Jun 2

Qatar Airways flights from St. Louis to Bangkok

Our best Qatar Airways deals on St. Louis to Bangkok flight tickets
Qatar Airways
Apr 19
STL12:27 pmLambert-St Louis
30h 38m
2 stops
BKK7:05 amBangkok Suvarnabhumi
Apr 28
BKK2:05 amBangkok Suvarnabhumi
29h 28m
2 stops
STL7:33 pmLambert-St Louis
$1,039
Qatar Airways
Aug 31
STL4:18 pmLambert-St Louis
26h 57m
2 stops
BKK7:15 amBangkok Suvarnabhumi
Sep 7
BKK9:05 pmBangkok Suvarnabhumi
34h 09m
2 stops
STL7:14 pmLambert-St Louis
$1,041
Qatar Airways
Apr 22
STL2:33 pmLambert-St Louis
28h 32m
2 stops
BKK7:05 amBangkok Suvarnabhumi
Apr 29
BKK1:45 amBangkok Suvarnabhumi
32h 32m
2 stops
STL10:17 pmLambert-St Louis
$1,073

United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets
United Airlines
Apr 29
STL2:40 pmLambert-St Louis
30h 55m
3 stops
BKK9:35 amBangkok Suvarnabhumi
May 20
BKK9:35 amBangkok Suvarnabhumi
38h 36m
2 stops
STL12:11 pmLambert-St Louis
$1,388
United Airlines
Apr 29
STL2:40 pmLambert-St Louis
30h 55m
3 stops
BKK9:35 amBangkok Suvarnabhumi
May 20
BKK3:45 pmBangkok Suvarnabhumi
30h 22m
3 stops
STL10:07 amLambert-St Louis
$1,399
United Airlines
Aug 20
STL1:36 pmLambert-St Louis
31h 59m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Nov 18
BKK9:10 amBangkok Suvarnabhumi
21h 59m
2 stops
STL6:09 pmLambert-St Louis
$1,400

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Bangkok that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 1, 2026.
Use the filters below to find and compare flights from St. Louis to Bangkok that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/2

8:00 am-6:30 am

2 stops34h 30m

Bangkok Suvarnabhumi

Sat 5/9

9:00 pm-1:22 pm

2 stops28h 22m

$973

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/29

7:00 am-6:45 am

2 stops35h 45m

Bangkok Suvarnabhumi

Wed 5/20

9:00 pm-7:21 pm

2 stops34h 21m

$975
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 5/1

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Tue 6/30

3:15 am-8:30 pm

2 stops29h 15m

$987

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

4:18 pm-11:50 am

2 stops31h 32m

Bangkok Suvarnabhumi

Wed 11/18

2:40 pm-5:54 pm

2 stops40h 14m

$1,008

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/13

7:00 am-6:45 am

2 stops35h 45m

Bangkok Suvarnabhumi

Mon 4/20

8:50 pm-4:41 pm

2 stops31h 51m

$1,035

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 4/19

12:27 pm-7:05 am

2 stops30h 38m

Bangkok Suvarnabhumi

Tue 4/28

2:05 am-7:33 pm

2 stops29h 28m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 8/31

4:18 pm-7:15 am

2 stops26h 57m

Bangkok Suvarnabhumi

Mon 9/7

9:05 pm-7:14 pm

2 stops34h 09m

$1,041

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/2

7:05 am-11:50 pm

2 stops28h 45m

Bangkok Suvarnabhumi

Sat 5/9

3:55 pm-4:41 pm

2 stops36h 46m

$1,056

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/22

2:33 pm-7:05 am

2 stops28h 32m

Bangkok Suvarnabhumi

Wed 4/29

1:45 am-10:17 pm

2 stops32h 32m

$1,073

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/23

6:00 am-6:45 am

2 stops36h 45m

Bangkok Suvarnabhumi

Tue 6/2

3:15 am-7:21 pm

2 stops28h 06m

$1,104

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Bangkok from

How to get the cheapest flight ticket from St. Louis to Bangkok

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Bangkok?

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of February, then book flights to Bangkok from St. Louis during January instead. Flights to Bangkok in January, while not as cheap as those in February, still average around $1,067.

How far in advance should I book a flight to Bangkok?

You are more likely to see cheaper flights to Bangkok from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Bangkok for around $1,278 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bangkok from St. Louis for as low as $987 on momondo.

Cheap St. Louis to Bangkok flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Bangkok

Fastest flight time

26h 12m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 26h 12m
There are no direct flights from St. Louis to Bangkok. There are no popular flight routes from St. Louis to Bangkok.
Search flight deals

Frequently asked questions about flying from St. Louis to Bangkok

  • How far is Lambert-St Louis to Bangkok by plane?

    A flight from Lambert-St Louis to Bangkok will travel around 8745.3 mi. Typically, this will take 26h 12m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Bangkok?

    Prices for flights from Lambert-St Louis Airport to Bangkok are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bangkok?

  • How old do you have to be to fly from Lambert-St Louis Airport to Bangkok?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Bangkok.

  • What documentation or ID do you need to fly to Bangkok?

    The travel and health documents you'll need for your trip to Bangkok may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Bangkok

Compare and see reviews for airlines that fly from St. Louis to Bangkok with momondo
Airline
Rating
Free Cancellation
Price
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,760 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,549 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,239 reviews
Search Cathay Pacific flights
DeltaPriceFrom $978Free CancellationRating
7.9
8,366 reviews
Search Delta flights
United AirlinesPriceFrom $983Free CancellationRating
7.4
9,534 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,162 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,017Free CancellationRating
7.4
3,732 reviews
Search Qatar Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Bangkok?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Bangkok from St. Louis.

Can I find flights from St. Louis to Bangkok with flexible booking policies on momondo?

Flights from St. Louis to Bangkok with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Bangkok?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bangkok from St. Louis.

I’m not ready to book a flight from St. Louis to Bangkok right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Bangkok flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok
Bangkok Suvarnabhumi Airport
Bangkok Don Mueang Intl Airport