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

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

What airlines fly to Bangkok?

United Airlines, Cathay Pacific and Japan Airlines 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 September 2025.

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.

$536 Cheap Flights from St. Louis to Bangkok in 2025/26

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 $1,075 to $1,251. The lowest price recently found on this route was $960.

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Find the cheapest flights from St. Louis to Bangkok

Round-trip

One-way

Last minute

Cheap round-trip flights

6:00 am - 4:25 pmSTL-BKK

45h 25m2 stops

1:10 am - 11:08 pmBKK-STL

34h 58m2 stops

$960Japan Airlines

Find Deal

Wed, Jan 7 - Tue, Mar 3

6:00 am - 4:25 pmSTL-BKK

45h 25m2 stops

9:55 am - 11:10 amBKK-STL

38h 15m2 stops

$964Japan Airlines

Find Deal

Wed, Jan 7 - Wed, Mar 4

6:00 am - 1:05 amSTL-BKK

31h 05m2 stops

11:15 pm - 10:04 pmBKK-STL

35h 49m2 stops

$979Delta

Find Deal

Mon, Oct 6 - Tue, Nov 4

6:45 am - 4:20 pmSTL-BKK

44h 35m2 stops

9:35 pm - 3:04 pmBKK-STL

29h 29m2 stops

$982ANA

Find Deal

Mon, Mar 2 - Mon, Apr 20

6:00 am - 5:10 amSTL-BKK

34h 10m2 stops

9:10 am - 9:13 pmBKK-STL

25h 03m2 stops

$984United Airlines

Find Deal

Mon, Dec 29 - Thu, Jan 8

1:35 pm - 11:25 amSTL-BKK

32h 50m3 stops

4:55 pm - 10:51 amBKK-STL

30h 56m3 stops

$998United Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 24

7:41 am - 5:10 amSTL-BKK

56h 29m3 stops

3:40 pm - 12:20 pmBKK-STL

32h 40m3 stops

$999United Airlines

Find Deal

Sun, Mar 1 - Mon, Apr 20

2:55 pm - 11:15 amSTL-BKK

31h 20m2 stops

11:55 pm - 11:56 pmBKK-STL

37h 01m2 stops

$1,002Multiple Airlines

Find Deal

Sat, Feb 21 - Sat, Feb 28

8:39 am - 2:05 pmSTL-BKK

40h 26m2 stops

3:05 pm - 10:34 pmBKK-STL

44h 29m2 stops

$1,073Cathay Pacific

Find Deal

Wed, Nov 26 - Sun, Nov 30

8:39 am - 4:40 pmSTL-BKK

43h 01m2 stops

4:55 pm - 7:27 pmBKK-STL

39h 32m2 stops

$1,074Cathay Pacific

Find Deal

Thu, Nov 13 - Mon, Nov 24

Delta flights from St. Louis to Bangkok

Our best Delta deals on St. Louis to Bangkok flight tickets

Delta

Oct 6

STL6:00 amLambert-St Louis

31h 05m

2 stops

BKK1:05 amBangkok Suvarnabhumi

Nov 4

BKK11:15 pmBangkok Suvarnabhumi

35h 49m

2 stops

STL10:04 pmLambert-St Louis

$979

Find similar

Delta

Sep 24

STL6:40 amLambert-St Louis

30h 25m

2 stops

BKK1:05 amBangkok Suvarnabhumi

Oct 1

BKK9:40 pmBangkok Suvarnabhumi

38h 58m

2 stops

STL12:38 amLambert-St Louis

$982

Find similar

Delta

Sep 24

STL8:40 amLambert-St Louis

28h 25m

2 stops

BKK1:05 amBangkok Suvarnabhumi

Sep 28

BKK9:40 pmBangkok Suvarnabhumi

37h 29m

2 stops

STL11:09 pmLambert-St Louis

$1,029

Find similar

Cathay Pacific flights from St. Louis to Bangkok

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

Cathay Pacific

Nov 26

STL8:39 amLambert-St Louis

40h 26m

2 stops

BKK2:05 pmBangkok Suvarnabhumi

Nov 30

BKK3:05 pmBangkok Suvarnabhumi

44h 29m

2 stops

STL10:34 pmLambert-St Louis

$1,073

Find similar

Cathay Pacific

Nov 13

STL8:39 amLambert-St Louis

43h 01m

2 stops

BKK4:40 pmBangkok Suvarnabhumi

Nov 24

BKK4:55 pmBangkok Suvarnabhumi

39h 32m

2 stops

STL7:27 pmLambert-St Louis

$1,074

Find similar

Cathay Pacific

Nov 30

STL8:39 amLambert-St Louis

26h 36m

2 stops

BKK12:15 amBangkok Suvarnabhumi

Dec 15

BKK4:55 pmBangkok Suvarnabhumi

42h 52m

2 stops

STL10:47 pmLambert-St Louis

$1,123

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

6:00 am-4:25 pm

2 stops45h 25m

Bangkok Suvarnabhumi

Tue 3/3

1:10 am-11:08 pm

2 stops34h 58m

$960

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

6:00 am-4:25 pm

2 stops45h 25m

Bangkok Suvarnabhumi

Wed 3/4

9:55 am-11:10 am

2 stops38h 15m

$964

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 10/6

6:00 am-1:05 am

2 stops31h 05m

Bangkok Suvarnabhumi

Tue 11/4

11:15 pm-10:04 pm

2 stops35h 49m

$979

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/2

6:45 am-4:20 pm

2 stops44h 35m

Bangkok Suvarnabhumi

Mon 4/20

9:35 pm-3:04 pm

2 stops29h 29m

$982

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 12/29

6:00 am-5:10 am

2 stops34h 10m

Bangkok Suvarnabhumi

Thu 1/8

9:10 am-9:13 pm

2 stops25h 03m

$984

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/13

1:35 pm-11:25 am

3 stops32h 50m

Bangkok Suvarnabhumi

Mon 11/24

4:55 pm-10:51 am

3 stops30h 56m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/1

7:41 am-5:10 am

3 stops56h 29m

Bangkok Suvarnabhumi

Mon 4/20

3:40 pm-12:20 pm

3 stops32h 40m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 2/21

2:55 pm-11:15 am

2 stops31h 20m

Bangkok Suvarnabhumi

Sat 2/28

11:55 pm-11:56 pm

2 stops37h 01m

$1,002

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/26

8:39 am-2:05 pm

2 stops40h 26m

Bangkok Suvarnabhumi

Sun 11/30

3:05 pm-10:34 pm

2 stops44h 29m

$1,073

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/13

8:39 am-4:40 pm

2 stops43h 01m

Bangkok Suvarnabhumi

Mon 11/24

4:55 pm-7:27 pm

2 stops39h 32m

$1,074

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 October, then book flights to Bangkok from St. Louis during January instead. Flights to Bangkok in January, while not as cheap as those in October, still average around $1,153.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from St. Louis is on a Monday. momondo users have found tickets for Monday departures for as low as $1,334. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Bangkok on a Thursday will generally be more expensive and average around $1,546. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Bangkok?

According to our data, the cheapest time of day to fly to Bangkok is in the morning. momondo users have found flights departing from St. Louis to Bangkok in the morning for as low as $1,339. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,754. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $1,295 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 $908 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

Direct flights	None

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 36m 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 September 2025.
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
Qatar Airways	PriceFrom $897	Free Cancellation	Rating 7.4 3,624 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $994	Free Cancellation	Rating 8.3 1,560 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $1,030	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
ANA	PriceFrom $1,053	Free Cancellation	Rating 8.4 964 reviews	Search ANA flights
Delta	PriceFrom $1,058	Free Cancellation	Rating 7.9 7,964 reviews	Search Delta flights
Air Canada	PriceFrom $1,176	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Cathay Pacific	PriceFrom $1,211	Free Cancellation	Rating 7.6 998 reviews	Search Cathay Pacific flights
Finnair	PriceFrom $1,289	Free Cancellation	Rating 7.6 1,324 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.