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

Japan Airlines is the most popular carrier operating from Lambert-St Louis to Bangkok

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 9 different airlines that fly to Bangkok on a routine basis, so you have a few additional options to choose from.

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 9 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.

$406 Cheap Flights from St. Louis to Bangkok in 2026

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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.

4:46 pm - 12:00 pm

STL

BKK

31h 14m

2 stops

5:50 pm - 3:50 pm

BKK

STL

58h 00m

2 stops

$873Multiple Airlines

Wed, Apr 22 - Mon, May 4

6:35 am - 12:55 am

STL

BKK

29h 20m

2 stops

9:30 pm - 11:58 pm

BKK

STL

38h 28m

2 stops

$882Delta

Mon, Mar 2 - Mon, Mar 16

6:56 pm - 12:55 am

STL

BKK

40h 59m

2 stops

9:30 pm - 11:58 pm

BKK

STL

38h 28m

2 stops

$887Delta

Sun, Mar 1 - Wed, Mar 11

5:25 pm - 11:40 pm

STL

BKK

42h 15m

2 stops

9:50 am - 12:22 am

BKK

STL

26h 32m

2 stops

$888Delta

Sun, Apr 12 - Thu, Apr 23

9:55 am - 11:25 am

STL

BKK

36h 30m

3 stops

4:55 pm - 8:41 pm

BKK

STL

39h 46m

3 stops

$902United Airlines

Mon, Mar 2 - Mon, Mar 16

7:00 am - 12:35 pm

STL

BKK

40h 35m

2 stops

1:45 pm - 11:59 pm

BKK

STL

22h 14m

2 stops

$912Multiple Airlines

Fri, Mar 6 - Fri, Mar 13

6:35 am - 11:20 pm

STL

BKK

27h 45m

2 stops

9:30 pm - 11:36 pm

BKK

STL

39h 06m

2 stops

$916Delta

Tue, Feb 17 - Fri, Mar 6

6:10 am - 9:30 pm

STL

BKK

26h 20m

2 stops

11:15 pm - 12:25 am

BKK

STL

38h 10m

2 stops

$931Delta

Mon, Feb 16 - Mon, Feb 23

7:00 am - 12:35 pm

STL

BKK

40h 35m

2 stops

1:45 pm - 11:59 pm

BKK

STL

22h 14m

2 stops

$932Multiple Airlines

Thu, Mar 5 - Thu, Mar 12

11:25 am - 11:25 am

STL

BKK

35h 00m

3 stops

4:55 pm - 10:36 am

BKK

STL

30h 41m

3 stops

$936United Airlines

Tue, Feb 17 - Fri, Mar 6

United Airlines flights from St. Louis to Bangkok

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

United Airlines

Mar 2

STL9:55 amLambert-St Louis

36h 30m

3 stops

BKK11:25 amBangkok Suvarnabhumi

Mar 16

BKK4:55 pmBangkok Suvarnabhumi

39h 46m

3 stops

STL8:41 pmLambert-St Louis

$902

United Airlines

Feb 17

STL11:25 amLambert-St Louis

35h 00m

3 stops

BKK11:25 amBangkok Suvarnabhumi

Mar 6

BKK4:55 pmBangkok Suvarnabhumi

30h 41m

3 stops

STL10:36 amLambert-St Louis

$936

United Airlines

Feb 25

STL6:25 amLambert-St Louis

28h 55m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Mar 8

BKK4:55 pmBangkok Suvarnabhumi

39h 46m

3 stops

STL8:41 pmLambert-St Louis

$940

Cathay Pacific flights from St. Louis to Bangkok

Our best Cathay Pacific deals on St. Louis to Bangkok flight tickets

Cathay Pacific

Apr 1

STL8:00 amLambert-St Louis

27h 50m

2 stops

BKK11:50 pmBangkok Suvarnabhumi

Apr 22

BKK7:00 pmBangkok Suvarnabhumi

40h 48m

2 stops

STL11:48 pmLambert-St Louis

$1,003

Cathay Pacific

Apr 1

STL9:37 amLambert-St Louis

26h 13m

2 stops

BKK11:50 pmBangkok Suvarnabhumi

Apr 22

BKK4:25 pmBangkok Suvarnabhumi

41h 49m

2 stops

STL10:14 pmLambert-St Louis

$1,005

Cathay Pacific

Apr 2

STL6:50 pmLambert-St Louis

31h 10m

2 stops

BKK2:00 pmBangkok Suvarnabhumi

Apr 30

BKK8:05 amBangkok Suvarnabhumi

26h 59m

2 stops

STL11:04 pmLambert-St Louis

$1,057

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/22

4:46 pm-12:00 pm

2 stops31h 14m

Bangkok Suvarnabhumi

Mon 5/4

5:50 pm-3:50 pm

2 stops58h 00m

$873

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

6:35 am-12:55 am

2 stops29h 20m

Bangkok Suvarnabhumi

Mon 3/16

9:30 pm-11:58 pm

2 stops38h 28m

$882

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/1

6:56 pm-12:55 am

2 stops40h 59m

Bangkok Suvarnabhumi

Wed 3/11

9:30 pm-11:58 pm

2 stops38h 28m

$887

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 4/12

5:25 pm-11:40 pm

2 stops42h 15m

Bangkok Suvarnabhumi

Thu 4/23

9:50 am-12:22 am

2 stops26h 32m

$888

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

9:55 am-11:25 am

3 stops36h 30m

Bangkok Suvarnabhumi

Mon 3/16

4:55 pm-8:41 pm

3 stops39h 46m

$902

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 3/6

7:00 am-12:35 pm

2 stops40h 35m

Bangkok Suvarnabhumi

Fri 3/13

1:45 pm-11:59 pm

2 stops22h 14m

$912

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/17

6:35 am-11:20 pm

2 stops27h 45m

Bangkok Suvarnabhumi

Fri 3/6

9:30 pm-11:36 pm

2 stops39h 06m

$916

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/16

6:10 am-9:30 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Mon 2/23

11:15 pm-12:25 am

2 stops38h 10m

$931

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 3/5

7:00 am-12:35 pm

2 stops40h 35m

Bangkok Suvarnabhumi

Thu 3/12

1:45 pm-11:59 pm

2 stops22h 14m

$932

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/17

11:25 am-11:25 am

3 stops35h 00m

Bangkok Suvarnabhumi

Fri 3/6

4:55 pm-10:36 am

3 stops30h 41m

$936

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 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 $1,297 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 29m
Direct flights	None

The fastest flight from St. Louis to Bangkok takes 26h 29m

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 29m 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 9 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
Japan Airlines	PriceFrom $966	Free Cancellation	Rating 8.3 1,688 reviews	Search Japan Airlines flights
Cathay Pacific	PriceFrom $979	Free Cancellation	Rating 7.6 1,140 reviews	Search Cathay Pacific flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,174 reviews	Search American Airlines flights
United Airlines	PriceFrom $984	Free Cancellation	Rating 7.4 9,191 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,076 reviews	Search ANA flights
Delta	PriceFrom $1,040	Free Cancellation	Rating 7.9 8,088 reviews	Search Delta flights
Qatar Airways	PriceFrom $1,094	Free Cancellation	Rating 7.4 3,718 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $1,280	Free Cancellation	Rating 7.1 10,646 reviews	Search Air Canada flights
Finnair	PriceFrom $1,356	Free Cancellation	Rating 7.6 1,353 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.