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Cheap flights from St. Louis to Bangkok from $577

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 8/8. 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.
Etihad Airways Logo
6:54 am - 11:50 pm
STL
-
BKK
28h 56m
2 stops
Etihad Airways Logo
8:30 am - 1:17 pm
BKK
-
STL
41h 47m
2 stops
$1,023Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Etihad Airways Logo
10:22 am - 6:45 am
STL
-
BKK
32h 23m
2 stops
Etihad Airways Logo
3:55 pm - 7:42 pm
BKK
-
STL
39h 47m
2 stops
$1,025Etihad Airways
Wed, Aug 19 - Fri, Sep 4
Etihad Airways Logo
6:54 am - 6:45 am
STL
-
BKK
35h 51m
2 stops
Etihad Airways Logo
3:15 am - 8:20 am
BKK
-
STL
41h 05m
2 stops
$1,030Etihad Airways
Wed, Sep 2 - Fri, Sep 18
Multiple Airlines Logo
5:30 am - 11:50 pm
STL
-
BKK
30h 20m
2 stops
Multiple Airlines Logo
3:15 am - 11:25 pm
BKK
-
STL
32h 10m
2 stops
$1,038Multiple Airlines
Sun, Oct 11 - Fri, Oct 23
Etihad Airways Logo
1:25 pm - 12:10 pm
STL
-
BKK
34h 45m
2 stops
Etihad Airways Logo
3:55 pm - 5:34 pm
BKK
-
STL
37h 39m
2 stops
$1,048Etihad Airways
Sun, Aug 30 - Sat, Sep 5
Etihad Airways Logo
6:00 am - 11:50 pm
STL
-
BKK
29h 50m
2 stops
Etihad Airways Logo
3:55 pm - 12:55 pm
BKK
-
STL
33h 00m
2 stops
$1,086Etihad Airways
Wed, Aug 12 - Fri, Aug 21
Etihad Airways Logo
6:54 am - 11:50 pm
STL
-
BKK
28h 56m
2 stops
Etihad Airways Logo
3:55 pm - 12:55 pm
BKK
-
STL
33h 00m
2 stops
$1,088Etihad Airways
Wed, Aug 12 - Fri, Aug 21
Multiple Airlines Logo
5:30 am - 11:50 pm
STL
-
BKK
30h 20m
2 stops
Multiple Airlines Logo
9:00 pm - 3:30 pm
BKK
-
STL
30h 30m
2 stops
$1,098Multiple Airlines
Fri, Oct 9 - Thu, Oct 22
Multiple Airlines Logo
5:05 pm - 6:10 pm
STL
-
BKK
37h 05m
2 stops
Multiple Airlines Logo
3:55 pm - 12:54 pm
BKK
-
STL
32h 59m
2 stops
$1,101Multiple Airlines
Sat, Aug 8 - Mon, Aug 24
STARLUX Airlines Logo
7:00 am - 4:30 pm
STL
-
BKK
44h 30m
2 stops
STARLUX Airlines Logo
5:40 pm - 11:56 pm
BKK
-
STL
43h 16m
2 stops
$1,124STARLUX Airlines
Tue, Nov 3 - Sun, Nov 8

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Air Canada flights from St. Louis to Bangkok

Our best Air Canada deals on St. Louis to Bangkok flight tickets
Air Canada
Aug 5
STL12:10 pmLambert-St Louis
28h 55m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Aug 17
BKK7:45 amBangkok Suvarnabhumi
46h 57m
2 stops
STL6:42 pmLambert-St Louis
$1,335
Air Canada
Aug 1
STL12:10 pmLambert-St Louis
28h 55m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Aug 17
BKK7:45 amBangkok Suvarnabhumi
46h 57m
2 stops
STL6:42 pmLambert-St Louis
$1,380
Air Canada
Jul 15
STL12:10 pmLambert-St Louis
28h 55m
2 stops
BKK5:05 amBangkok Suvarnabhumi
Jul 22
BKK7:05 amBangkok Suvarnabhumi
47h 37m
2 stops
STL6:42 pmLambert-St Louis
$1,416

United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets
United Airlines
Sep 10
STL4:40 pmLambert-St Louis
28h 55m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Sep 17
BKK9:35 amBangkok Suvarnabhumi
38h 27m
2 stops
STL12:02 pmLambert-St Louis
$1,363
United Airlines
Sep 11
STL4:40 pmLambert-St Louis
28h 55m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Sep 22
BKK7:00 amBangkok Suvarnabhumi
27h 00m
2 stops
STL10:00 pmLambert-St Louis
$1,364
United Airlines
Jul 15
STL5:10 amLambert-St Louis
30h 45m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Jul 22
BKK9:35 amBangkok Suvarnabhumi
50h 09m
2 stops
STL11:44 pmLambert-St Louis
$1,366

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 June 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

Thu 8/20

6:54 am-11:50 pm

2 stops28h 56m

Bangkok Suvarnabhumi

Wed 11/18

8:30 am-1:17 pm

2 stops41h 47m

$1,023

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/19

10:22 am-6:45 am

2 stops32h 23m

Bangkok Suvarnabhumi

Fri 9/4

3:55 pm-7:42 pm

2 stops39h 47m

$1,025

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

6:54 am-6:45 am

2 stops35h 51m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:20 am

2 stops41h 05m

$1,030

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/11

5:30 am-11:50 pm

2 stops30h 20m

Bangkok Suvarnabhumi

Fri 10/23

3:15 am-11:25 pm

2 stops32h 10m

$1,038

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 8/30

1:25 pm-12:10 pm

2 stops34h 45m

Bangkok Suvarnabhumi

Sat 9/5

3:55 pm-5:34 pm

2 stops37h 39m

$1,048

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/12

6:00 am-11:50 pm

2 stops29h 50m

Bangkok Suvarnabhumi

Fri 8/21

3:55 pm-12:55 pm

2 stops33h 00m

$1,086

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/12

6:54 am-11:50 pm

2 stops28h 56m

Bangkok Suvarnabhumi

Fri 8/21

3:55 pm-12:55 pm

2 stops33h 00m

$1,088
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 10/9

5:30 am-11:50 pm

2 stops30h 20m

Bangkok Suvarnabhumi

Thu 10/22

9:00 pm-3:30 pm

2 stops30h 30m

$1,098

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 8/8

5:05 pm-6:10 pm

2 stops37h 05m

Bangkok Suvarnabhumi

Mon 8/24

3:55 pm-12:54 pm

2 stops32h 59m

$1,101

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 11/3

7:00 am-4:30 pm

2 stops44h 30m

Bangkok Suvarnabhumi

Sun 11/8

5:40 pm-11:56 pm

2 stops43h 16m

$1,124

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 December instead. Flights to Bangkok in December, while not as cheap as those in February, still average around $825.

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 $1,275 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

24h 47m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 24h 47m
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 24h 47m 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
7.9
8,400 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,839 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,660 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,380 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $977Free CancellationRating
7.4
9,841 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.3
1,236 reviews
Search ANA flights
EVA AirPriceFrom $1,048Free CancellationRating
8.5
1,474 reviews
Search EVA Air flights
Qatar AirwaysPriceFrom $1,094Free CancellationRating
7.3
3,727 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