What airlines fly to Bangkok?

United Airlines, Cathay Pacific and Delta are the top three most popular airlines that fly to Bangkok from St. Louis according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 10 different airlines that fly to Bangkok on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Lambert-St Louis to Bangkok?

ANA and United Airlines are the most popular carriers operating from Lambert-St Louis to Bangkok

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?

The number of operators available for flights from Lambert-St Louis Airport to Bangkok is 10 as of January 2026.

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.

$463 Cheap Flights from St. Louis to Bangkok in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Bangkok?

Prices are currently low for flights on this route. Typical prices usually range from $999 to $1,171. The lowest price recently found on this route was $882.

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Find the cheapest flights from St. Louis to Bangkok

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 12:45 am

STL

BKK

28h 45m

2 stops

9:30 pm - 11:58 pm

BKK

STL

38h 28m

2 stops

$882Delta

Mon, Mar 2 - Mon, Mar 9

6:35 am - 12:45 am

STL

BKK

29h 10m

2 stops

3:05 am - 10:58 pm

BKK

STL

32h 53m

2 stops

$916Delta

Thu, Feb 5 - Sat, Mar 7

5:50 pm - 12:55 am

STL

BKK

42h 05m

2 stops

3:05 am - 10:58 pm

BKK

STL

32h 53m

2 stops

$921Delta

Wed, Feb 25 - Sat, Mar 7

7:00 am - 12:55 am

STL

BKK

28h 55m

2 stops

11:15 pm - 12:25 am

BKK

STL

38h 10m

2 stops

$931Delta

Mon, Feb 16 - Mon, Feb 23

8:30 am - 11:25 am

STL

BKK

37h 55m

3 stops

4:55 pm - 8:58 pm

BKK

STL

41h 03m

3 stops

$936United Airlines

Thu, Jan 29 - Sun, Feb 8

7:05 am - 11:00 pm

STL

BKK

27h 55m

2 stops

8:05 am - 11:59 pm

BKK

STL

27h 54m

2 stops

$941Japan Airlines

Mon, Apr 20 - Mon, May 4

8:30 am - 11:25 am

STL

BKK

37h 55m

3 stops

4:55 pm - 5:11 am

BKK

STL

25h 16m

2 stops

$944United Airlines

Thu, Jan 29 - Sun, Feb 8

9:57 am - 11:25 am

STL

BKK

36h 28m

3 stops

4:55 pm - 1:16 pm

BKK

STL

33h 21m

3 stops

$945United Airlines

Mon, Jan 26 - Thu, Jan 29

1:35 pm - 4:25 pm

STL

BKK

37h 50m

2 stops

8:05 am - 1:03 pm

BKK

STL

41h 58m

2 stops

$953Japan Airlines

Mon, Jan 26 - Thu, Jan 29

4:20 pm - 12:10 pm

STL

BKK

31h 50m

2 stops

1:20 pm - 11:59 pm

BKK

STL

46h 39m

2 stops

$961China Airlines

Mon, Apr 13 - Mon, Apr 20

United Airlines flights from St. Louis to Bangkok

Our best United Airlines deals on St. Louis to Bangkok flight tickets

United Airlines

Jan 19

STL6:45 amLambert-St Louis

39h 40m

2 stops

BKK11:25 amBangkok Suvarnabhumi

Feb 2

BKK4:55 pmBangkok Suvarnabhumi

41h 03m

3 stops

STL8:58 pmLambert-St Louis

$897

United Airlines

Jan 29

STL8:30 amLambert-St Louis

37h 55m

3 stops

BKK11:25 amBangkok Suvarnabhumi

Feb 8

BKK4:55 pmBangkok Suvarnabhumi

41h 03m

3 stops

STL8:58 pmLambert-St Louis

$936

United Airlines

Jan 29

STL8:30 amLambert-St Louis

37h 55m

3 stops

BKK11:25 amBangkok Suvarnabhumi

Feb 8

BKK4:55 pmBangkok Suvarnabhumi

25h 16m

2 stops

STL5:11 amLambert-St Louis

$944

Japan Airlines flights from St. Louis to Bangkok

Our best Japan Airlines deals on St. Louis to Bangkok flight tickets

Japan Airlines

Apr 20

STL7:05 amLambert-St Louis

27h 55m

2 stops

BKK11:00 pmBangkok Suvarnabhumi

May 4

BKK8:05 amBangkok Suvarnabhumi

27h 54m

2 stops

STL11:59 pmLambert-St Louis

$941

Japan Airlines

Jan 26

STL1:35 pmLambert-St Louis

37h 50m

2 stops

BKK4:25 pmBangkok Suvarnabhumi

Jan 29

BKK8:05 amBangkok Suvarnabhumi

41h 58m

2 stops

STL1:03 pmLambert-St Louis

$953

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

7:00 am-12:45 am

2 stops28h 45m

Bangkok Suvarnabhumi

Mon 3/9

9:30 pm-11:58 pm

2 stops38h 28m

$882

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 2/5

6:35 am-12:45 am

2 stops29h 10m

Bangkok Suvarnabhumi

Sat 3/7

3:05 am-10:58 pm

2 stops32h 53m

$916

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

5:50 pm-12:55 am

2 stops42h 05m

Bangkok Suvarnabhumi

Sat 3/7

3:05 am-10:58 pm

2 stops32h 53m

$921

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/16

7:00 am-12:55 am

2 stops28h 55m

Bangkok Suvarnabhumi

Mon 2/23

11:15 pm-12:25 am

2 stops38h 10m

$931

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 1/29

8:30 am-11:25 am

3 stops37h 55m

Bangkok Suvarnabhumi

Sun 2/8

4:55 pm-8:58 pm

3 stops41h 03m

$936

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/20

7:05 am-11:00 pm

2 stops27h 55m

Bangkok Suvarnabhumi

Mon 5/4

8:05 am-11:59 pm

2 stops27h 54m

$941

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 1/29

8:30 am-11:25 am

3 stops37h 55m

Bangkok Suvarnabhumi

Sun 2/8

4:55 pm-5:11 am

2 stops25h 16m

$944

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

9:57 am-11:25 am

3 stops36h 28m

Bangkok Suvarnabhumi

Thu 1/29

4:55 pm-1:16 pm

3 stops33h 21m

$945

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

1:35 pm-4:25 pm

2 stops37h 50m

Bangkok Suvarnabhumi

Thu 1/29

8:05 am-1:03 pm

2 stops41h 58m

$953

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/13

4:20 pm-12:10 pm

2 stops31h 50m

Bangkok Suvarnabhumi

Mon 4/20

1:20 pm-11:59 pm

2 stops46h 39m

$961

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 January, then book flights to Bangkok from St. Louis during September instead. Flights to Bangkok in September, while not as cheap as those in January, still average around $1,097.

How far in advance should I book a flight 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 $1,298 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 $991 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 35m
Direct flights	None

The fastest flight from St. Louis to Bangkok takes 26h 35m

There are no direct flights from St. Louis to Bangkok. There are no popular flight routes from St. Louis to Bangkok.

Search flight deals

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 35m 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?
The number of operators available for flights from Lambert-St Louis Airport to Bangkok is 10 as of January 2026.
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
Korean Air	PriceFrom $793	Free Cancellation	Rating 8.4 1,187 reviews	Search Korean Air flights
Japan Airlines	PriceFrom $966	Free Cancellation	Rating 8.3 1,685 reviews	Search Japan Airlines flights
Cathay Pacific	PriceFrom $979	Free Cancellation	Rating 7.6 1,130 reviews	Search Cathay Pacific flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,135 reviews	Search American Airlines flights
United Airlines	PriceFrom $984	Free Cancellation	Rating 7.4 9,164 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,073 reviews	Search ANA flights
Delta	PriceFrom $1,040	Free Cancellation	Rating 7.9 8,050 reviews	Search Delta flights
Qatar Airways	PriceFrom $1,094	Free Cancellation	Rating 7.4 3,715 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $1,280	Free Cancellation	Rating 7.1 10,624 reviews	Search Air Canada flights
Finnair	PriceFrom $1,356	Free Cancellation	Rating 7.6 1,349 reviews	Search Finnair 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.