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Cheap flights from St. Louis to Bangkok from $540

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 9/13. 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
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
9:39 am - 6:15 am
STL
-
BKK
32h 36m
2 stops
Multiple Airlines Logo
3:15 am - 7:20 pm
BKK
-
STL
28h 05m
2 stops
$967Multiple Airlines
Mon, Jun 29 - Mon, Jul 13
Etihad Airways Logo
7:38 am - 11:50 pm
STL
-
BKK
28h 12m
2 stops
Etihad Airways Logo
3:05 pm - 11:31 pm
BKK
-
STL
44h 26m
2 stops
$969Etihad Airways
Mon, Oct 5 - Sat, Oct 10
Etihad Airways Logo
7:44 am - 11:50 pm
STL
-
BKK
28h 06m
2 stops
Etihad Airways Logo
3:05 pm - 10:24 pm
BKK
-
STL
43h 19m
2 stops
$999Etihad Airways
Thu, Sep 10 - Thu, Sep 17
Etihad Airways Logo
4:29 pm - 6:15 am
STL
-
BKK
25h 46m
2 stops
Etihad Airways Logo
8:50 pm - 11:09 pm
BKK
-
STL
38h 19m
2 stops
$1,006Etihad Airways
Sun, Sep 27 - Sun, Oct 25
Multiple Airlines Logo
7:23 am - 6:45 am
STL
-
BKK
35h 22m
2 stops
Multiple Airlines Logo
8:50 pm - 1:17 pm
BKK
-
STL
29h 27m
2 stops
$1,009Multiple Airlines
Thu, Aug 20 - Wed, Nov 18
Multiple Airlines Logo
9:38 am - 11:50 pm
STL
-
BKK
26h 12m
2 stops
Multiple Airlines Logo
3:05 pm - 7:02 pm
BKK
-
STL
39h 57m
2 stops
$1,039Multiple Airlines
Sun, Oct 11 - Sat, Oct 24
Multiple Airlines Logo
7:23 am - 6:15 am
STL
-
BKK
34h 52m
2 stops
Multiple Airlines Logo
2:40 pm - 1:17 pm
BKK
-
STL
35h 37m
2 stops
$1,045Multiple Airlines
Thu, Aug 20 - Wed, Nov 18
Multiple Airlines Logo
10:22 am - 6:45 am
STL
-
BKK
32h 23m
2 stops
Multiple Airlines Logo
3:15 am - 8:03 pm
BKK
-
STL
28h 48m
2 stops
$1,069Multiple Airlines
Wed, Sep 2 - Fri, Sep 18
Multiple Airlines Logo
6:54 am - 11:50 pm
STL
-
BKK
28h 56m
2 stops
Multiple Airlines Logo
3:15 am - 11:20 pm
BKK
-
STL
32h 05m
2 stops
$1,099Multiple Airlines
Wed, Sep 2 - Fri, Sep 18
Qatar Airways Logo
6:06 am - 12:55 pm
STL
-
BKK
42h 49m
2 stops
Qatar Airways Logo
9:05 pm - 8:03 pm
BKK
-
STL
34h 58m
2 stops
$1,101Qatar Airways
Wed, Sep 16 - Fri, Sep 25

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Finnair flights from St. Louis to Bangkok

Our best Finnair deals on St. Louis to Bangkok flight tickets
Finnair
Jun 9
STL5:00 pmLambert-St Louis
48h 30m
2 stops
BKK5:30 amBangkok Suvarnabhumi
Jul 7
BKK7:05 amBangkok Suvarnabhumi
48h 46m
2 stops
STL7:51 pmLambert-St Louis
$1,422
Finnair
Jun 10
STL5:00 pmLambert-St Louis
48h 30m
2 stops
BKK5:30 amBangkok Suvarnabhumi
Jun 17
BKK7:05 amBangkok Suvarnabhumi
28h 51m
2 stops
STL11:56 pmLambert-St Louis
$1,441
Finnair
Jun 3
STL5:00 pmLambert-St Louis
48h 30m
2 stops
BKK5:30 amBangkok Suvarnabhumi
Jul 1
BKK7:05 amBangkok Suvarnabhumi
47h 30m
2 stops
STL6:35 pmLambert-St Louis
$1,463

Etihad Airways flights from St. Louis to Bangkok

Our best Etihad Airways deals on St. Louis to Bangkok flight tickets
Etihad Airways
Sep 10
STL7:44 amLambert-St Louis
28h 06m
2 stops
BKK11:50 pmBangkok Suvarnabhumi
Sep 17
BKK3:05 pmBangkok Suvarnabhumi
43h 19m
2 stops
STL10:24 pmLambert-St Louis
$999
Etihad Airways
Sep 27
STL4:29 pmLambert-St Louis
25h 46m
2 stops
BKK6:15 amBangkok Suvarnabhumi
Oct 25
BKK8:50 pmBangkok Suvarnabhumi
38h 19m
2 stops
STL11:09 pmLambert-St Louis
$1,006
Etihad Airways
Jun 15
STL7:00 amLambert-St Louis
28h 50m
2 stops
BKK11:50 pmBangkok Suvarnabhumi
Jun 21
BKK3:15 amBangkok Suvarnabhumi
28h 06m
2 stops
STL7:21 pmLambert-St Louis
$1,278

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 26, 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
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 6/29

9:39 am-6:15 am

2 stops32h 36m

Bangkok Suvarnabhumi

Mon 7/13

3:15 am-7:20 pm

2 stops28h 05m

$967

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 10/5

7:38 am-11:50 pm

2 stops28h 12m

Bangkok Suvarnabhumi

Sat 10/10

3:05 pm-11:31 pm

2 stops44h 26m

$969

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 9/10

7:44 am-11:50 pm

2 stops28h 06m

Bangkok Suvarnabhumi

Thu 9/17

3:05 pm-10:24 pm

2 stops43h 19m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/27

4:29 pm-6:15 am

2 stops25h 46m

Bangkok Suvarnabhumi

Sun 10/25

8:50 pm-11:09 pm

2 stops38h 19m

$1,006

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

7:23 am-6:45 am

2 stops35h 22m

Bangkok Suvarnabhumi

Wed 11/18

8:50 pm-1:17 pm

2 stops29h 27m

$1,009

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/11

9:38 am-11:50 pm

2 stops26h 12m

Bangkok Suvarnabhumi

Sat 10/24

3:05 pm-7:02 pm

2 stops39h 57m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

7:23 am-6:15 am

2 stops34h 52m

Bangkok Suvarnabhumi

Wed 11/18

2:40 pm-1:17 pm

2 stops35h 37m

$1,045

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

10:22 am-6:45 am

2 stops32h 23m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:03 pm

2 stops28h 48m

$1,069

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-11:20 pm

2 stops32h 05m

$1,099

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/16

6:06 am-12:55 pm

2 stops42h 49m

Bangkok Suvarnabhumi

Fri 9/25

9:05 pm-8:03 pm

2 stops34h 58m

$1,101

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 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 $1,261 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

26h 16m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 26h 16m
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 16m 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
8,461 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,789 reviews
Search Japan Airlines flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,668 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,302 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $983Free CancellationRating
7.4
9,664 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.4
1,195 reviews
Search ANA flights
Qatar AirwaysPriceFrom $1,094Free CancellationRating
7.4
3,725 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