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Cheap flights from St. Louis to Bangkok from $563

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 8/15. 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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0 bags

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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
7:00 am - 11:50 pm
STL
-
BKK
28h 50m
2 stops
Multiple Airlines Logo
3:55 pm - 7:30 pm
BKK
-
STL
39h 35m
2 stops
$954Multiple Airlines
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
9:10 am - 6:45 am
STL
-
BKK
33h 35m
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
8:54 am - 6:15 am
STL
-
BKK
33h 21m
2 stops
Multiple Airlines Logo
3:55 pm - 4:00 pm
BKK
-
STL
36h 05m
2 stops
$996Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
9:46 am - 6:15 am
STL
-
BKK
32h 29m
2 stops
Multiple Airlines Logo
3:15 am - 8:03 pm
BKK
-
STL
28h 48m
2 stops
$1,008Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Multiple Airlines Logo
9:10 am - 11:50 pm
STL
-
BKK
26h 40m
2 stops
Multiple Airlines Logo
3:55 pm - 4:41 pm
BKK
-
STL
36h 46m
2 stops
$1,035Multiple Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
7:05 am - 6:30 am
STL
-
BKK
35h 25m
2 stops
Multiple Airlines Logo
9:00 pm - 11:44 pm
BKK
-
STL
38h 44m
2 stops
$1,053Multiple Airlines
Sat, May 9 - Sat, May 23
Multiple Airlines Logo
8:35 am - 6:15 am
STL
-
BKK
33h 40m
2 stops
Multiple Airlines Logo
2:40 pm - 5:54 pm
BKK
-
STL
40h 14m
2 stops
$1,068Multiple Airlines
Thu, Aug 20 - Wed, Nov 18
Multiple Airlines Logo
5:51 am - 6:30 am
STL
-
BKK
36h 39m
2 stops
Multiple Airlines Logo
3:05 pm - 5:20 pm
BKK
-
STL
38h 15m
2 stops
$1,104Multiple Airlines
Mon, May 18 - Sat, Jun 13
Multiple Airlines Logo
5:51 am - 11:50 pm
STL
-
BKK
29h 59m
2 stops
Multiple Airlines Logo
3:55 pm - 8:30 pm
BKK
-
STL
40h 35m
2 stops
$1,106Multiple Airlines
Sun, May 17 - Sun, May 24
Multiple Airlines Logo
5:51 am - 11:50 pm
STL
-
BKK
29h 59m
2 stops
Multiple Airlines Logo
3:55 pm - 8:30 pm
BKK
-
STL
40h 35m
2 stops
$1,107Multiple Airlines
Sun, May 17 - Sun, May 24

Air Canada flights from St. Louis to Bangkok

Our best Air Canada deals on St. Louis to Bangkok flight tickets
Air Canada
May 26
STL1:05 pmLambert-St Louis
52h 00m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jun 24
BKK7:05 amBangkok Suvarnabhumi
49h 20m
2 stops
STL8:25 pmLambert-St Louis
$1,343
Air Canada
May 29
STL2:15 pmLambert-St Louis
50h 50m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jun 24
BKK7:05 amBangkok Suvarnabhumi
25h 20m
2 stops
STL8:25 pmLambert-St Louis
$1,386
Air Canada
Apr 15
STL9:10 amLambert-St Louis
31h 55m
2 stops
BKK5:05 amBangkok Suvarnabhumi
May 25
BKK7:05 amBangkok Suvarnabhumi
44h 41m
2 stops
STL3:46 pmLambert-St Louis
$2,747

EVA Air flights from St. Louis to Bangkok

Our best EVA Air deals on St. Louis to Bangkok flight tickets
EVA Air
Aug 16
STL7:56 pmLambert-St Louis
26h 54m
2 stops
BKK10:50 amBangkok Suvarnabhumi
Aug 24
BKK1:35 amBangkok Suvarnabhumi
28h 05m
2 stops
STL5:40 pmLambert-St Louis
$1,120
EVA Air
Aug 3
STL8:10 amLambert-St Louis
27h 20m
2 stops
BKK11:30 pmBangkok Suvarnabhumi
Aug 19
BKK1:35 amBangkok Suvarnabhumi
35h 10m
2 stops
STL12:45 amLambert-St Louis
$1,244

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 7, 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

Sun 5/3

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Sun 5/10

3:55 pm-7:30 pm

2 stops39h 35m

$954

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/29

9:10 am-6:45 am

2 stops33h 35m

Bangkok Suvarnabhumi

Wed 5/20

9:00 pm-7:21 pm

2 stops34h 21m

$975

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 5/5

8:54 am-6:15 am

2 stops33h 21m

Bangkok Suvarnabhumi

Tue 5/12

3:55 pm-4:00 pm

2 stops36h 05m

$996
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/9

9:46 am-6:15 am

2 stops32h 29m

Bangkok Suvarnabhumi

Tue 9/15

3:15 am-8:03 pm

2 stops28h 48m

$1,008

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 5/6

9:10 am-11:50 pm

2 stops26h 40m

Bangkok Suvarnabhumi

Wed 5/13

3:55 pm-4:41 pm

2 stops36h 46m

$1,035

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/9

7:05 am-6:30 am

2 stops35h 25m

Bangkok Suvarnabhumi

Sat 5/23

9:00 pm-11:44 pm

2 stops38h 44m

$1,053

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

8:35 am-6:15 am

2 stops33h 40m

Bangkok Suvarnabhumi

Wed 11/18

2:40 pm-5:54 pm

2 stops40h 14m

$1,068

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 5/18

5:51 am-6:30 am

2 stops36h 39m

Bangkok Suvarnabhumi

Sat 6/13

3:05 pm-5:20 pm

2 stops38h 15m

$1,104

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 5/17

5:51 am-11:50 pm

2 stops29h 59m

Bangkok Suvarnabhumi

Sun 5/24

3:55 pm-8:30 pm

2 stops40h 35m

$1,106

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 5/17

5:51 am-11:50 pm

2 stops29h 59m

Bangkok Suvarnabhumi

Sun 5/24

3:55 pm-8:30 pm

2 stops40h 35m

$1,107

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 $1,262 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 $1,036 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

25h 57m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 25h 57m
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 25h 57m 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
1,770 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,553 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,254 reviews
Search Cathay Pacific flights
DeltaPriceFrom $978Free CancellationRating
7.9
8,389 reviews
Search Delta flights
United AirlinesPriceFrom $983Free CancellationRating
7.4
9,551 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,169 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,017Free CancellationRating
7.4
3,729 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