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Cheap flights from St. Louis to Bangkok from $621

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.
1 adult
1 adult, Economy, 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.
Etihad Airways Logo
9:21 am - 11:50 pm
STL
-
BKK
26h 29m
2 stops
Etihad Airways Logo
2:55 am - 1:17 pm
BKK
-
STL
47h 22m
2 stops
$1,012Etihad Airways
Thu, Aug 20 - Tue, Nov 17
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
$1,014Etihad Airways
Thu, Aug 20 - Wed, Nov 18
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
$1,015Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Etihad Airways Logo
6:02 am - 6:35 am
STL
-
BKK
36h 33m
2 stops
Etihad Airways Logo
2:40 pm - 7:02 pm
BKK
-
STL
40h 22m
2 stops
$1,018Etihad Airways
Sun, Oct 25 - Fri, Oct 30
Etihad Airways Logo
6:54 am - 11:50 pm
STL
-
BKK
28h 56m
2 stops
Etihad Airways Logo
3:15 am - 8:20 am
BKK
-
STL
41h 05m
2 stops
$1,019Etihad Airways
Wed, Sep 2 - Fri, Sep 18
Etihad Airways Logo
8:34 am - 11:50 pm
STL
-
BKK
27h 16m
2 stops
Etihad Airways Logo
3:15 am - 8:20 am
BKK
-
STL
41h 05m
2 stops
$1,021Etihad Airways
Wed, Sep 2 - Fri, Sep 18
Etihad Airways Logo
8:34 am - 11:50 pm
STL
-
BKK
27h 16m
2 stops
Etihad Airways Logo
3:15 am - 8:20 am
BKK
-
STL
41h 05m
2 stops
$1,022Etihad Airways
Wed, Sep 2 - Fri, Sep 18
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
$1,024Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Etihad Airways Logo
7:38 am - 6:35 am
STL
-
BKK
34h 57m
2 stops
Etihad Airways Logo
8:30 am - 7:27 pm
BKK
-
STL
47h 57m
2 stops
$1,032Etihad Airways
Wed, Oct 28 - Fri, Nov 27
Multiple Airlines Logo
5:18 pm - 6:45 am
STL
-
BKK
25h 27m
2 stops
Multiple Airlines Logo
9:00 pm - 5:30 pm
BKK
-
STL
32h 30m
2 stops
$1,038Multiple Airlines
Thu, Sep 10 - Thu, Sep 17

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
50h 03m
2 stops
STL11:38 pmLambert-St Louis
$1,363
United Airlines
Oct 3
STL3:11 pmLambert-St Louis
30h 24m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Oct 10
BKK9:35 amBangkok Suvarnabhumi
47h 46m
2 stops
STL9:21 pmLambert-St Louis
$1,367
United Airlines
Aug 19
STL12:59 pmLambert-St Louis
32h 36m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Aug 26
BKK7:00 amBangkok Suvarnabhumi
21h 34m
2 stops
STL4:34 pmLambert-St Louis
$1,369

ANA flights from St. Louis to Bangkok

Our best ANA deals on St. Louis to Bangkok flight tickets
ANA
Jul 9
STL1:13 pmLambert-St Louis
28h 42m
2 stops
BKK5:55 amBangkok Suvarnabhumi
Jul 16
BKK9:35 pmBangkok Suvarnabhumi
26h 36m
2 stops
STL12:11 pmLambert-St Louis
$1,393
ANA
Jun 16
STL6:00 amLambert-St Louis
29h 55m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Jul 17
BKK7:00 amBangkok Suvarnabhumi
41h 11m
2 stops
STL12:11 pmLambert-St Louis
$1,718
ANA
Jun 16
STL1:05 pmLambert-St Louis
44h 50m
2 stops
BKK9:55 pmBangkok Suvarnabhumi
Jul 17
BKK7:00 amBangkok Suvarnabhumi
43h 02m
2 stops
STL2:02 pmLambert-St Louis
$1,743

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 4, 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

9:21 am-11:50 pm

2 stops26h 29m

Bangkok Suvarnabhumi

Tue 11/17

2:55 am-1:17 pm

2 stops47h 22m

$1,012

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

$1,014

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

$1,015

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/25

6:02 am-6:35 am

2 stops36h 33m

Bangkok Suvarnabhumi

Fri 10/30

2:40 pm-7:02 pm

2 stops40h 22m

$1,018

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

6:54 am-11:50 pm

2 stops28h 56m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:20 am

2 stops41h 05m

$1,019

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

8:34 am-11:50 pm

2 stops27h 16m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:20 am

2 stops41h 05m

$1,021

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

8:34 am-11:50 pm

2 stops27h 16m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:20 am

2 stops41h 05m

$1,022

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

$1,024

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 10/28

7:38 am-6:35 am

2 stops34h 57m

Bangkok Suvarnabhumi

Fri 11/27

8:30 am-7:27 pm

2 stops47h 57m

$1,032
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 9/10

5:18 pm-6:45 am

2 stops25h 27m

Bangkok Suvarnabhumi

Thu 9/17

9:00 pm-5:30 pm

2 stops32h 30m

$1,038

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 $1,281 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 $1,069 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 27m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 25h 27m
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 27m 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
8,396 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,835 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,357 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $982Free CancellationRating
7.4
9,774 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.3
1,220 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,017Free CancellationRating
7.4
3,730 reviews
Search Qatar Airways flights
EVA AirPriceFrom $1,048Free CancellationRating
8.5
1,465 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