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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 8/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
12:17 pm - 10:40 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
34h 23m3 stops Las Vegas Harry Reid Intl Los Angeles Incheon Intl
Multiple Airlines Logo
1:35 am - 4:34 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
50h 59m3 stops Incheon Intl Los Angeles Orlando
$1,029Multiple Airlines
Sat, Sep 12 - Fri, Sep 18
Multiple Airlines Logo
1:06 pm - 6:45 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
29h 39m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl
Multiple Airlines Logo
3:55 pm - 3:51 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
35h 56m2 stops Abu Dhabi Zayed Intl Charlotte Douglas
$1,037Multiple Airlines
Sat, Oct 10 - Tue, Oct 20
Qatar Airways Logo
11:32 am - 6:40 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
30h 08m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
2:30 am - 7:33 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
29h 03m2 stops Doha Hamad Intl Chicago O'Hare Intl
$1,067Qatar Airways
Tue, Nov 10 - Thu, Apr 29
Qatar Airways Logo
7:29 am - 6:20 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
34h 51m2 stops Chicago O'Hare Intl Doha Hamad Intl
Qatar Airways Logo
8:00 pm - 8:57 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
36h 57m2 stops Doha Hamad Intl Chicago O'Hare Intl
$1,069Qatar Airways
Tue, Oct 6 - Tue, Oct 20
Japan Airlines Logo
11:01 am - 11:00 pmSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
47h 59m2 stops Chicago O'Hare Intl Tokyo Narita
Japan Airlines Logo
9:55 am - 11:52 amBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
37h 57m2 stops Tokyo Haneda Chicago O'Hare Intl
$1,122Japan Airlines
Sun, Oct 4 - Sun, Nov 1
United Airlines Logo
9:00 am - 9:35 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
36h 35m3 stops Denver Intl Los Angeles Hong Kong Intl
United Airlines Logo
7:00 am - 10:59 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
27h 59m2 stops Tokyo Narita Chicago O'Hare Intl
$1,149United Airlines
Mon, Oct 12 - Wed, Oct 21
Delta Logo
11:13 am - 11:35 pmSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
24h 22m2 stops Minneapolis St Paul Incheon Intl
Delta Logo
9:50 am - 9:00 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
23h 10m2 stops Incheon Intl Salt Lake City
$1,149Delta
Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
9:40 am - 4:35 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
30h 55m2 stops Chicago O'Hare Intl Tokyo Haneda
United Airlines Logo
9:35 am - 8:00 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
46h 25m2 stops Tokyo Haneda Chicago O'Hare Intl
$1,155United Airlines
Thu, Sep 10 - Mon, Sep 14
Japan Airlines Logo
8:13 pm - 11:35 pmSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
38h 22m2 stops Chicago O'Hare Intl Tokyo Narita
Japan Airlines Logo
8:05 am - 4:43 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
21h 38m2 stops Tokyo Narita Chicago O'Hare Intl
$1,183Japan Airlines
Sun, Nov 1 - Sun, Nov 8
Delta Logo
6:40 am - 12:45 amSTL  Lambert-St Louis-BKK Bangkok Suvarnabhumi
29h 05m2 stops Detroit Metropolitan Wayne County Incheon Intl
Delta Logo
12:55 am - 1:23 pmBKK  Bangkok Suvarnabhumi-STL Lambert-St Louis
25h 28m2 stops Incheon Intl Detroit Metropolitan Wayne County
$1,199Delta
Sat, Nov 14 - Sun, Nov 22

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Japan Airlines flights from St. Louis to Bangkok

Our best Japan Airlines deals on St. Louis to Bangkok flight tickets
Japan Airlines
Oct 4
STL11:01 amLambert-St Louis
47h 59m
2 stops
BKK11:00 pmBangkok Suvarnabhumi
Nov 1
BKK9:55 amBangkok Suvarnabhumi
37h 57m
2 stops
STL11:52 amLambert-St Louis
$1,122
Japan Airlines
Aug 19
STL6:00 amLambert-St Louis
29h 00m
2 stops
BKK11:00 pmBangkok Suvarnabhumi
Sep 4
BKK7:55 amBangkok Suvarnabhumi
41h 00m
2 stops
STL12:55 pmLambert-St Louis
$1,177
Japan Airlines
Aug 19
STL9:32 amLambert-St Louis
41h 38m
2 stops
BKK3:10 pmBangkok Suvarnabhumi
Sep 3
BKK12:30 amBangkok Suvarnabhumi
34h 29m
2 stops
STL10:59 pmLambert-St Louis
$1,182

STARLUX Airlines flights from St. Louis to Bangkok

Our best STARLUX Airlines deals on St. Louis to Bangkok flight tickets
STARLUX Airlines
Oct 28
STL4:42 pmLambert-St Louis
35h 48m
2 stops
BKK4:30 pmBangkok Suvarnabhumi
Nov 11
BKK5:40 pmBangkok Suvarnabhumi
43h 19m
2 stops
STL11:59 pmLambert-St Louis
$1,146
STARLUX Airlines
Oct 10
STL4:42 pmLambert-St Louis
31h 18m
2 stops
BKK12:00 pmBangkok Suvarnabhumi
Nov 10
BKK1:45 pmBangkok Suvarnabhumi
37h 40m
2 stops
STL2:25 pmLambert-St Louis
$1,161

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 August 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 Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sat 9/12

12:17 pm-10:40 am

3 stops34h 23m

Bangkok Suvarnabhumi

Fri 9/18

1:35 am-4:34 pm

3 stops50h 59m

$1,029

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sat 10/10

1:06 pm-6:45 am

2 stops29h 39m

Bangkok Suvarnabhumi

Tue 10/20

3:55 pm-3:51 pm

2 stops35h 56m

$1,037

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 11/10

11:32 am-6:40 am

2 stops30h 08m

Bangkok Suvarnabhumi

Thu 4/29

2:30 am-7:33 pm

2 stops29h 03m

$1,067

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 10/6

7:29 am-6:20 am

2 stops34h 51m

Bangkok Suvarnabhumi

Tue 10/20

8:00 pm-8:57 pm

2 stops36h 57m

$1,069

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 10/4

11:01 am-11:00 pm

2 stops47h 59m

Bangkok Suvarnabhumi

Sun 11/1

9:55 am-11:52 am

2 stops37h 57m

$1,122

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Mon 10/12

9:00 am-9:35 am

3 stops36h 35m

Bangkok Suvarnabhumi

Wed 10/21

7:00 am-10:59 pm

2 stops27h 59m

$1,149
Quickest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 8/26

11:13 am-11:35 pm

2 stops24h 22m

Bangkok Suvarnabhumi

Tue 9/1

9:50 am-9:00 pm

2 stops23h 10m

$1,149

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Thu 9/10

9:40 am-4:35 am

2 stops30h 55m

Bangkok Suvarnabhumi

Mon 9/14

9:35 am-8:00 pm

2 stops46h 25m

$1,155

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 11/1

8:13 pm-11:35 pm

2 stops38h 22m

Bangkok Suvarnabhumi

Sun 11/8

8:05 am-4:43 pm

2 stops21h 38m

$1,183

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sat 11/14

6:40 am-12:45 am

2 stops29h 05m

Bangkok Suvarnabhumi

Sun 11/22

12:55 am-1:23 pm

2 stops25h 28m

$1,199

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?

Prices are currently typical for flights on this route.

Typical prices usually range from $946 to $1,377.
The lowest price recently found on this route was $1,029.

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 August instead. Flights to Bangkok in August, while not as cheap as those in February, still average around $1,031.

How far in advance should I book a flight from St. Louis 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 $1,301 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 $1,013 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 17m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 26h 17m
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 17m 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
DeltaPriceFrom $881Free CancellationRating
7.8
8,511 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,903 reviews
Search Japan Airlines flights
Qatar AirwaysPriceFrom $946Free CancellationRating
7.4
3,739 reviews
Search Qatar Airways flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,939 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,453 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $982Free CancellationRating
7.4
10,113 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.3
1,298 reviews
Search ANA flights
EVA AirPriceFrom $1,048Free CancellationRating
8.5
1,517 reviews
Search EVA Air 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