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Cheap flights from St. Louis to Bangkok from $480

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
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.
Air Canada Logo
9:30 am - 5:05 am
STL
-
BKK
31h 35m
2 stops
Air Canada Logo
7:05 am - 6:42 pm
BKK
-
STL
47h 37m
2 stops
$1,024Air Canada
Wed, Aug 19 - Wed, Aug 26
Multiple Airlines Logo
7:29 am - 11:55 pm
STL
-
BKK
28h 26m
2 stops
Multiple Airlines Logo
3:15 am - 9:08 pm
BKK
-
STL
29h 53m
2 stops
$1,037Multiple Airlines
Wed, Oct 7 - Tue, Oct 13
Qatar Airways Logo
11:31 am - 6:15 am
STL
-
BKK
29h 44m
2 stops
Qatar Airways Logo
3:00 am - 11:44 pm
BKK
-
STL
33h 44m
2 stops
$1,198Qatar Airways
Sun, Jan 17 - Mon, Mar 1
Qatar Airways Logo
7:00 am - 6:40 am
STL
-
BKK
34h 40m
2 stops
Qatar Airways Logo
2:00 am - 10:18 pm
BKK
-
STL
33h 18m
2 stops
$1,198Qatar Airways
Mon, Nov 2 - Tue, Nov 24
United Airlines Logo
6:59 pm - 9:35 am
STL
-
BKK
26h 36m
3 stops
United Airlines Logo
9:10 am - 7:23 pm
BKK
-
STL
23h 13m
2 stops
$1,361United Airlines
Thu, Aug 20 - Wed, Nov 18
United Airlines Logo
6:59 pm - 9:35 am
STL
-
BKK
26h 36m
3 stops
United Airlines Logo
9:35 am - 8:47 pm
BKK
-
STL
47h 12m
2 stops
$1,361United Airlines
Thu, Sep 3 - Mon, Sep 14
Cathay Pacific Logo
11:32 am - 12:15 am
STL
-
BKK
23h 43m
2 stops
Cathay Pacific Logo
11:40 am - 10:59 pm
BKK
-
STL
24h 19m
2 stops
$1,399Cathay Pacific
Thu, Nov 19 - Thu, Jan 14
Cathay Pacific Logo
1:06 pm - 12:10 am
STL
-
BKK
23h 04m
2 stops
Cathay Pacific Logo
7:55 am - 10:56 pm
BKK
-
STL
28h 01m
2 stops
$1,424Cathay Pacific
Sun, Oct 18 - Fri, Jan 1
ANA Logo
1:08 pm - 5:10 am
STL
-
BKK
27h 02m
2 stops
ANA Logo
4:55 pm - 6:05 pm
BKK
-
STL
38h 10m
1 stop
$1,578ANA
Mon, Nov 2 - Tue, Nov 24
ANA Logo
6:00 am - 5:10 am
STL
-
BKK
34h 10m
2 stops
ANA Logo
4:55 pm - 6:05 pm
BKK
-
STL
38h 10m
1 stop
$1,615ANA
Sun, Nov 1 - Wed, Nov 18

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United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets
United Airlines
Aug 13
STL11:15 amLambert-St Louis
48h 40m
2 stops
BKK11:55 pmBangkok Suvarnabhumi
Aug 22
BKK3:45 pmBangkok Suvarnabhumi
41h 01m
3 stops
STL8:46 pmLambert-St Louis
$1,386
United Airlines
Aug 12
STL5:30 pmLambert-St Louis
28h 05m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Aug 21
BKK3:45 pmBangkok Suvarnabhumi
34h 28m
3 stops
STL2:13 pmLambert-St Louis
$1,515
United Airlines
Aug 12
STL3:32 pmLambert-St Louis
30h 03m
3 stops
BKK9:35 amBangkok Suvarnabhumi
Aug 21
BKK3:45 pmBangkok Suvarnabhumi
41h 01m
3 stops
STL8:46 pmLambert-St Louis
$1,530

Qatar Airways flights from St. Louis to Bangkok

Our best Qatar Airways deals on St. Louis to Bangkok flight tickets
Qatar Airways
Nov 2
STL7:00 amLambert-St Louis
34h 40m
2 stops
BKK6:40 amBangkok Suvarnabhumi
Nov 22
BKK2:00 amBangkok Suvarnabhumi
33h 18m
2 stops
STL10:18 pmLambert-St Louis
$1,198
Qatar Airways
Nov 1
STL1:20 pmLambert-St Louis
27h 55m
2 stops
BKK6:15 amBangkok Suvarnabhumi
Nov 24
BKK3:00 amBangkok Suvarnabhumi
29h 25m
2 stops
STL7:25 pmLambert-St Louis
$1,207
Qatar Airways
Nov 4
STL11:32 amLambert-St Louis
29h 43m
2 stops
BKK6:15 amBangkok Suvarnabhumi
Nov 24
BKK3:00 amBangkok Suvarnabhumi
29h 25m
2 stops
STL7:25 pmLambert-St Louis
$1,243

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 30, 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

Wed 8/19

9:30 am-5:05 am

2 stops31h 35m

Bangkok Suvarnabhumi

Wed 8/26

7:05 am-6:42 pm

2 stops47h 37m

$1,024

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 10/7

7:29 am-11:55 pm

2 stops28h 26m

Bangkok Suvarnabhumi

Tue 10/13

3:15 am-9:08 pm

2 stops29h 53m

$1,037

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 1/17

11:31 am-6:15 am

2 stops29h 44m

Bangkok Suvarnabhumi

Mon 3/1

3:00 am-11:44 pm

2 stops33h 44m

$1,198

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 11/2

7:00 am-6:40 am

2 stops34h 40m

Bangkok Suvarnabhumi

Tue 11/24

2:00 am-10:18 pm

2 stops33h 18m

$1,198

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

6:59 pm-9:35 am

3 stops26h 36m

Bangkok Suvarnabhumi

Wed 11/18

9:10 am-7:23 pm

2 stops23h 13m

$1,361

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 9/3

6:59 pm-9:35 am

3 stops26h 36m

Bangkok Suvarnabhumi

Mon 9/14

9:35 am-8:47 pm

2 stops47h 12m

$1,361
Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/19

11:32 am-12:15 am

2 stops23h 43m

Bangkok Suvarnabhumi

Thu 1/14

11:40 am-10:59 pm

2 stops24h 19m

$1,399

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/18

1:06 pm-12:10 am

2 stops23h 04m

Bangkok Suvarnabhumi

Fri 1/1

7:55 am-10:56 pm

2 stops28h 01m

$1,424

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 11/2

1:08 pm-5:10 am

2 stops27h 02m

Bangkok Suvarnabhumi

Tue 11/24

4:55 pm-6:05 pm

1 stop38h 10m

$1,578

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 11/1

6:00 am-5:10 am

2 stops34h 10m

Bangkok Suvarnabhumi

Wed 11/18

4:55 pm-6:05 pm

1 stop38h 10m

$1,615

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 $1,018.

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of August, then book flights to Bangkok from St. Louis during February instead. Flights to Bangkok in February, while not as cheap as those in August, still average around $1,024.

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 $1,289 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

25h 00m

Direct flights

None
The fastest flight from St. Louis to Bangkok takes 25h 00m
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 00m 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
8,487 reviews
Search Delta flights
Japan AirlinesPriceFrom $929Free CancellationRating
8.3
1,888 reviews
Search Japan Airlines flights
Qatar AirwaysPriceFrom $946Free CancellationRating
7.3
3,743 reviews
Search Qatar Airways flights
American AirlinesPriceFrom $954Free CancellationRating
7.1
11,842 reviews
Search American Airlines flights
Cathay PacificPriceFrom $974Free CancellationRating
7.6
1,433 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $982Free CancellationRating
7.4
10,051 reviews
Search United Airlines flights
ANAPriceFrom $1,007Free CancellationRating
8.3
1,285 reviews
Search ANA flights
EVA AirPriceFrom $1,048Free CancellationRating
8.5
1,506 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