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Cheap flights from St. Louis to Bangkok from $585

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 8/1. 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 - 11:55 pm
STL
-
BKK
29h 01m
2 stops
Etihad Airways Logo
8:30 am - 1:17 pm
BKK
-
STL
41h 47m
2 stops
$1,029Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Etihad Airways Logo
6:54 am - 6:45 am
STL
-
BKK
35h 51m
2 stops
Etihad Airways Logo
7:55 pm - 1:17 pm
BKK
-
STL
30h 22m
2 stops
$1,030Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Etihad Airways Logo
5:28 am - 11:55 pm
STL
-
BKK
30h 27m
2 stops
Etihad Airways Logo
8:30 am - 2:46 pm
BKK
-
STL
42h 16m
2 stops
$1,031Etihad Airways
Mon, Oct 19 - Mon, Oct 26
Etihad Airways Logo
3:25 pm - 6:45 am
STL
-
BKK
51h 20m
2 stops
Etihad Airways Logo
8:50 pm - 1:17 pm
BKK
-
STL
29h 27m
2 stops
$1,036Etihad Airways
Thu, Aug 20 - Wed, Nov 18
Multiple Airlines Logo
9:32 am - 11:55 pm
STL
-
BKK
26h 23m
2 stops
Multiple Airlines Logo
9:00 pm - 8:44 pm
BKK
-
STL
35h 44m
2 stops
$1,037Multiple Airlines
Wed, Sep 2 - Sat, Sep 19
Multiple Airlines Logo
9:12 am - 11:20 pm
STL
-
BKK
25h 08m
2 stops
Multiple Airlines Logo
2:40 pm - 9:08 pm
BKK
-
STL
43h 28m
2 stops
$1,038Multiple Airlines
Sun, Nov 1 - Sun, Nov 8
Etihad Airways Logo
10:22 am - 11:55 pm
STL
-
BKK
25h 33m
2 stops
Etihad Airways Logo
3:15 am - 10:55 pm
BKK
-
STL
55h 40m
2 stops
$1,088Etihad Airways
Mon, Aug 17 - Sun, Aug 30
Etihad Airways Logo
6:54 am - 11:55 pm
STL
-
BKK
29h 01m
2 stops
Etihad Airways Logo
3:55 pm - 12:54 pm
BKK
-
STL
32h 59m
2 stops
$1,089Etihad Airways
Sat, Aug 8 - Wed, Aug 19
Multiple Airlines Logo
7:16 am - 11:55 pm
STL
-
BKK
28h 39m
2 stops
Multiple Airlines Logo
3:15 am - 9:08 pm
BKK
-
STL
29h 53m
2 stops
$1,094Multiple Airlines
Fri, Oct 9 - Wed, Oct 21
Multiple Airlines Logo
7:16 am - 11:55 pm
STL
-
BKK
28h 39m
2 stops
Multiple Airlines Logo
3:15 am - 9:08 pm
BKK
-
STL
29h 53m
2 stops
$1,095Multiple Airlines
Fri, Oct 9 - Wed, Oct 21

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Lufthansa flights from St. Louis to Bangkok

Our best Lufthansa deals on St. Louis to Bangkok flight tickets
Lufthansa
Sep 15
STL12:28 pmLambert-St Louis
37h 17m
2 stops
BKK1:45 pmBangkok Suvarnabhumi
Oct 6
BKK10:55 pmBangkok Suvarnabhumi
34h 14m
2 stops
STL9:09 pmLambert-St Louis
$1,159
Lufthansa
Sep 13
STL12:59 pmLambert-St Louis
36h 46m
2 stops
BKK1:45 pmBangkok Suvarnabhumi
Oct 15
BKK10:55 pmBangkok Suvarnabhumi
52h 48m
2 stops
STL3:43 pmLambert-St Louis
$1,174
Lufthansa
Nov 16
STL1:24 pmLambert-St Louis
36h 26m
2 stops
BKK2:50 pmBangkok Suvarnabhumi
Dec 16
BKK2:00 pmBangkok Suvarnabhumi
60h 45m
2 stops
STL1:45 pmLambert-St Louis
$1,185

Etihad Airways flights from St. Louis to Bangkok

Our best Etihad Airways deals on St. Louis to Bangkok flight tickets
Etihad Airways
Aug 20
STL6:54 amLambert-St Louis
29h 01m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Nov 18
BKK8:30 amBangkok Suvarnabhumi
41h 47m
2 stops
STL1:17 pmLambert-St Louis
$1,029
Etihad Airways
Aug 20
STL6:54 amLambert-St Louis
35h 51m
2 stops
BKK6:45 amBangkok Suvarnabhumi
Nov 18
BKK7:55 pmBangkok Suvarnabhumi
30h 22m
2 stops
STL1:17 pmLambert-St Louis
$1,030
Etihad Airways
Oct 19
STL5:28 amLambert-St Louis
30h 27m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Oct 26
BKK8:30 amBangkok Suvarnabhumi
42h 16m
2 stops
STL2:46 pmLambert-St Louis
$1,031

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 July 3, 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-11:55 pm

2 stops29h 01m

Bangkok Suvarnabhumi

Wed 11/18

8:30 am-1:17 pm

2 stops41h 47m

$1,029

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

6:54 am-6:45 am

2 stops35h 51m

Bangkok Suvarnabhumi

Wed 11/18

7:55 pm-1:17 pm

2 stops30h 22m

$1,030

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 10/19

5:28 am-11:55 pm

2 stops30h 27m

Bangkok Suvarnabhumi

Mon 10/26

8:30 am-2:46 pm

2 stops42h 16m

$1,031

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

3:25 pm-6:45 am

2 stops51h 20m

Bangkok Suvarnabhumi

Wed 11/18

8:50 pm-1:17 pm

2 stops29h 27m

$1,036

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

9:32 am-11:55 pm

2 stops26h 23m

Bangkok Suvarnabhumi

Sat 9/19

9:00 pm-8:44 pm

2 stops35h 44m

$1,037

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 11/1

9:12 am-11:20 pm

2 stops25h 08m

Bangkok Suvarnabhumi

Sun 11/8

2:40 pm-9:08 pm

2 stops43h 28m

$1,038

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 8/17

10:22 am-11:55 pm

2 stops25h 33m

Bangkok Suvarnabhumi

Sun 8/30

3:15 am-10:55 pm

2 stops55h 40m

$1,088

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 8/8

6:54 am-11:55 pm

2 stops29h 01m

Bangkok Suvarnabhumi

Wed 8/19

3:55 pm-12:54 pm

2 stops32h 59m

$1,089
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 10/9

7:16 am-11:55 pm

2 stops28h 39m

Bangkok Suvarnabhumi

Wed 10/21

3:15 am-9:08 pm

2 stops29h 53m

$1,094

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 10/9

7:16 am-11:55 pm

2 stops28h 39m

Bangkok Suvarnabhumi

Wed 10/21

3:15 am-9:08 pm

2 stops29h 53m

$1,095

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 August instead. Flights to Bangkok in August, while not as cheap as those in February, still average around $853.

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 $1,283 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 $1,014 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 23m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 26h 23m
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 23m 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
8,451 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,859 reviews
Search Japan Airlines flights
Qatar AirwaysPriceFrom $946Free CancellationRating
7.3
3,742 reviews
Search Qatar Airways flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,766 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,403 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $982Free CancellationRating
7.4
9,929 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.3
1,260 reviews
Search ANA flights
EVA AirPriceFrom $1,048Free CancellationRating
8.5
1,484 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