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Cheap flights from St. Louis to Bangkok from $514

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 5/6. 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 - 6:04 pm
BKK
-
STL
38h 09m
2 stops
$954Multiple Airlines
Sun, May 10 - Sat, May 16
Japan Airlines Logo
8:35 am - 5:45 am
STL
-
BKK
33h 10m
2 stops
Japan Airlines Logo
12:30 am - 11:02 pm
BKK
-
STL
34h 32m
2 stops
$968Japan Airlines
Sun, Sep 6 - Sat, Sep 12
Etihad Airways Logo
4:18 pm - 6:15 am
STL
-
BKK
25h 57m
2 stops
Etihad Airways Logo
3:05 pm - 10:24 pm
BKK
-
STL
43h 19m
2 stops
$969Etihad Airways
Fri, Sep 4 - Sun, Sep 13
Multiple Airlines Logo
8:57 am - 6:45 am
STL
-
BKK
33h 48m
2 stops
Multiple Airlines Logo
9:00 pm - 6:04 pm
BKK
-
STL
33h 04m
2 stops
$976Multiple Airlines
Sat, May 2 - Sat, May 16
Multiple Airlines Logo
7:00 am - 11:50 pm
STL
-
BKK
28h 50m
2 stops
Multiple Airlines Logo
9:00 pm - 6:04 pm
BKK
-
STL
33h 04m
2 stops
$992Multiple Airlines
Sun, May 3 - Sat, May 9
Multiple Airlines Logo
8:57 am - 6:45 am
STL
-
BKK
33h 48m
2 stops
Multiple Airlines Logo
9:00 pm - 4:41 pm
BKK
-
STL
31h 41m
2 stops
$997Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
5:27 am - 11:50 pm
STL
-
BKK
30h 23m
2 stops
Multiple Airlines Logo
3:15 am - 11:20 pm
BKK
-
STL
32h 05m
2 stops
$1,008Multiple Airlines
Sun, Sep 6 - Fri, Sep 11
Multiple Airlines Logo
4:32 pm - 11:50 am
STL
-
BKK
31h 18m
2 stops
Multiple Airlines Logo
2:40 pm - 4:18 pm
BKK
-
STL
38h 38m
2 stops
$1,009Multiple Airlines
Sat, Oct 10 - Tue, Nov 10
Multiple Airlines Logo
8:00 am - 6:45 am
STL
-
BKK
34h 45m
2 stops
Multiple Airlines Logo
9:00 pm - 6:04 pm
BKK
-
STL
33h 04m
2 stops
$1,036Multiple Airlines
Sat, May 2 - Sat, May 16
Multiple Airlines Logo
9:45 am - 11:50 pm
STL
-
BKK
26h 05m
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

Qatar Airways flights from St. Louis to Bangkok

Our best Qatar Airways deals on St. Louis to Bangkok flight tickets
Qatar Airways
Apr 14
STL9:34 amLambert-St Louis
39h 31m
2 stops
BKK1:05 pmBangkok Suvarnabhumi
Apr 20
BKK2:30 amBangkok Suvarnabhumi
32h 29m
2 stops
STL10:59 pmLambert-St Louis
$1,136
Qatar Airways
Apr 15
STL12:55 pmLambert-St Louis
37h 20m
2 stops
BKK2:15 pmBangkok Suvarnabhumi
Apr 28
BKK2:30 amBangkok Suvarnabhumi
32h 29m
2 stops
STL10:59 pmLambert-St Louis
$1,137
Qatar Airways
Apr 17
STL7:12 amLambert-St Louis
35h 38m
2 stops
BKK6:50 amBangkok Suvarnabhumi
Apr 23
BKK2:30 amBangkok Suvarnabhumi
32h 29m
2 stops
STL10:59 pmLambert-St Louis
$1,154

Air Canada flights from St. Louis to Bangkok

Our best Air Canada deals on St. Louis to Bangkok flight tickets
Air Canada
Jun 1
STL2:15 pmLambert-St Louis
26h 50m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jun 29
BKK7:05 amBangkok Suvarnabhumi
25h 20m
2 stops
STL8:25 pmLambert-St Louis
$1,279
Air Canada
Jun 9
STL1:05 pmLambert-St Louis
52h 00m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jun 19
BKK7:05 amBangkok Suvarnabhumi
25h 20m
2 stops
STL8:25 pmLambert-St Louis
$1,299
Air Canada
Jun 9
STL1:05 pmLambert-St Louis
52h 00m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jul 7
BKK9:35 pmBangkok Suvarnabhumi
52h 27m
2 stops
STL2:02 pmLambert-St Louis
$1,384

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 13, 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 5/10

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Sat 5/16

3:55 pm-6:04 pm

2 stops38h 09m

$954

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/6

8:35 am-5:45 am

2 stops33h 10m

Bangkok Suvarnabhumi

Sat 9/12

12:30 am-11:02 pm

2 stops34h 32m

$968

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 9/4

4:18 pm-6:15 am

2 stops25h 57m

Bangkok Suvarnabhumi

Sun 9/13

3:05 pm-10:24 pm

2 stops43h 19m

$969

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/2

8:57 am-6:45 am

2 stops33h 48m

Bangkok Suvarnabhumi

Sat 5/16

9:00 pm-6:04 pm

2 stops33h 04m

$976
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 5/3

7:00 am-11:50 pm

2 stops28h 50m

Bangkok Suvarnabhumi

Sat 5/9

9:00 pm-6:04 pm

2 stops33h 04m

$992

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/2

8:57 am-6:45 am

2 stops33h 48m

Bangkok Suvarnabhumi

Sat 5/9

9:00 pm-4:41 pm

2 stops31h 41m

$997

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/6

5:27 am-11:50 pm

2 stops30h 23m

Bangkok Suvarnabhumi

Fri 9/11

3:15 am-11:20 pm

2 stops32h 05m

$1,008

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 10/10

4:32 pm-11:50 am

2 stops31h 18m

Bangkok Suvarnabhumi

Tue 11/10

2:40 pm-4:18 pm

2 stops38h 38m

$1,009

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 5/2

8:00 am-6:45 am

2 stops34h 45m

Bangkok Suvarnabhumi

Sat 5/16

9:00 pm-6:04 pm

2 stops33h 04m

$1,036

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

9:45 am-11:50 pm

2 stops26h 05m

Bangkok Suvarnabhumi

Wed 11/18

2:40 pm-5:54 pm

2 stops40h 14m

$1,068

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 $1,264 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
1,779 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,571 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,275 reviews
Search Cathay Pacific flights
DeltaPriceFrom $978Free CancellationRating
7.9
8,408 reviews
Search Delta flights
United AirlinesPriceFrom $983Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,171 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,094Free CancellationRating
7.4
3,728 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