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Cheap flights from St. Louis to Bangkok from $439

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 8/12. 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.
Philippine Airlines Logo
3:24 pm - 8:55 am
STL
-
BKK
29h 31m
2 stops
Philippine Airlines Logo
7:30 pm - 2:26 pm
BKK
-
STL
54h 56m
2 stops
$838Philippine Airlines
Wed, Aug 26 - Mon, Sep 7
Multiple Airlines Logo
3:24 pm - 8:55 am
STL
-
BKK
29h 31m
2 stops
Multiple Airlines Logo
7:30 pm - 6:37 pm
BKK
-
STL
59h 07m
2 stops
$844Multiple Airlines
Tue, Sep 1 - Sat, Sep 12
Multiple Airlines Logo
9:15 am - 6:45 am
STL
-
BKK
33h 30m
2 stops
Multiple Airlines Logo
3:55 pm - 7:30 pm
BKK
-
STL
39h 35m
2 stops
$955Multiple Airlines
Wed, Apr 1 - Thu, Apr 30
Multiple Airlines Logo
11:25 am - 12:10 pm
STL
-
BKK
36h 45m
2 stops
Multiple Airlines Logo
3:55 pm - 1:22 pm
BKK
-
STL
33h 27m
2 stops
$976Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
7:00 am - 6:45 am
STL
-
BKK
35h 45m
2 stops
Multiple Airlines Logo
3:55 pm - 1:22 pm
BKK
-
STL
33h 27m
2 stops
$993Multiple Airlines
Wed, Apr 8 - Tue, Apr 21
Multiple Airlines Logo
7:00 am - 11:50 pm
STL
-
BKK
28h 50m
2 stops
Multiple Airlines Logo
3:55 pm - 2:03 pm
BKK
-
STL
34h 08m
2 stops
$1,025Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
7:00 am - 11:50 pm
STL
-
BKK
28h 50m
2 stops
Multiple Airlines Logo
3:55 pm - 4:41 pm
BKK
-
STL
36h 46m
2 stops
$1,028Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
8:57 am - 11:50 pm
STL
-
BKK
26h 53m
2 stops
Multiple Airlines Logo
3:55 pm - 7:30 pm
BKK
-
STL
39h 35m
2 stops
$1,036Multiple Airlines
Sat, Apr 11 - Thu, Apr 16
STARLUX Airlines Logo
7:32 pm - 12:00 pm
STL
-
BKK
28h 28m
2 stops
STARLUX Airlines Logo
5:50 pm - 2:26 pm
BKK
-
STL
56h 36m
2 stops
$1,044STARLUX Airlines
Fri, Aug 28 - Wed, Sep 9
STARLUX Airlines Logo
7:32 pm - 12:00 pm
STL
-
BKK
28h 28m
2 stops
STARLUX Airlines Logo
5:50 pm - 2:26 pm
BKK
-
STL
56h 36m
2 stops
$1,045STARLUX Airlines
Fri, Aug 28 - Wed, Sep 9

United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets
United Airlines
Apr 28
STL10:00 amLambert-St Louis
35h 35m
3 stops
BKK9:35 amBangkok Suvarnabhumi
May 12
BKK9:35 amBangkok Suvarnabhumi
43h 04m
2 stops
STL4:39 pmLambert-St Louis
$1,139
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
$1,150
United Airlines
Apr 26
STL7:45 amLambert-St Louis
61h 50m
3 stops
BKK9:35 amBangkok Suvarnabhumi
May 3
BKK9:35 amBangkok Suvarnabhumi
46h 16m
2 stops
STL7:51 pmLambert-St Louis
$1,155

ANA flights from St. Louis to Bangkok

Our best ANA deals on St. Louis to Bangkok flight tickets
ANA
May 15
STL8:30 pmLambert-St Louis
49h 05m
2 stops
BKK9:35 amBangkok Suvarnabhumi
May 20
BKK9:35 amBangkok Suvarnabhumi
32h 12m
2 stops
STL5:47 amLambert-St Louis
$1,252
ANA
Mar 16
STL8:17 amLambert-St Louis
28h 03m
2 stops
BKK12:20 amBangkok Suvarnabhumi
Mar 18
BKK4:55 pmBangkok Suvarnabhumi
39h 46m
2 stops
STL8:41 pmLambert-St Louis
$2,240
ANA
Mar 16
STL7:40 amLambert-St Louis
28h 40m
2 stops
BKK12:20 amBangkok Suvarnabhumi
Mar 23
BKK4:55 pmBangkok Suvarnabhumi
39h 46m
2 stops
STL8:41 pmLambert-St Louis
$2,245

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 March 15, 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

Wed 8/26

3:24 pm-8:55 am

2 stops29h 31m

Bangkok Suvarnabhumi

Mon 9/7

7:30 pm-2:26 pm

2 stops54h 56m

$838

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 9/1

3:24 pm-8:55 am

2 stops29h 31m

Bangkok Suvarnabhumi

Sat 9/12

7:30 pm-6:37 pm

2 stops59h 07m

$844

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

9:15 am-6:45 am

2 stops33h 30m

Bangkok Suvarnabhumi

Thu 4/30

3:55 pm-7:30 pm

2 stops39h 35m

$955

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 4/14

11:25 am-12:10 pm

2 stops36h 45m

Bangkok Suvarnabhumi

Tue 4/21

3:55 pm-1:22 pm

2 stops33h 27m

$976

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/8

7:00 am-6:45 am

2 stops35h 45m

Bangkok Suvarnabhumi

Tue 4/21

3:55 pm-1:22 pm

2 stops33h 27m

$993
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/29

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Wed 5/6

3:55 pm-2:03 pm

2 stops34h 08m

$1,025

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/27

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Mon 5/4

3:55 pm-4:41 pm

2 stops36h 46m

$1,028

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 4/11

8:57 am-11:50 pm

2 stops26h 53m

Bangkok Suvarnabhumi

Thu 4/16

3:55 pm-7:30 pm

2 stops39h 35m

$1,036

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 8/28

7:32 pm-12:00 pm

2 stops28h 28m

Bangkok Suvarnabhumi

Wed 9/9

5:50 pm-2:26 pm

2 stops56h 36m

$1,044

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 8/28

7:32 pm-12:00 pm

2 stops28h 28m

Bangkok Suvarnabhumi

Wed 9/9

5:50 pm-2:26 pm

2 stops56h 36m

$1,045

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 45m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 26h 45m
There are no direct flights from St. Louis to Bangkok. There are no popular flight routes from St. Louis to Bangkok.
Search flight deals

  • 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 45m 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
1,735 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,466 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,207 reviews
Search Cathay Pacific flights
DeltaPriceFrom $978Free CancellationRating
7.9
8,292 reviews
Search Delta flights
United AirlinesPriceFrom $984Free CancellationRating
7.4
9,428 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,129 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,017Free CancellationRating
7.4
3,737 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