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

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 46% 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 December 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.

$476 Cheap Flights from St. Louis to Bangkok in 2025/26

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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.

11:20 am - 6:30 am

STL

BKK

30h 10m2 stops

10:25 pm - 12:29 pm

BKK

STL

27h 04m2 stops

$883ANA

Tue, Jan 20 - Tue, Jan 27

8:05 am - 5:10 am

STL

BKK

32h 05m2 stops

7:10 am - 8:26 pm

BKK

STL

26h 16m2 stops

$888United Airlines

Mon, Feb 9 - Tue, Feb 17

7:45 am - 11:55 pm

STL

BKK

28h 10m2 stops

7:00 am - 5:47 am

BKK

STL

34h 47m2 stops

$899United Airlines

Wed, Apr 1 - Thu, Apr 30

6:45 am - 12:20 am

STL

BKK

28h 35m2 stops

4:55 pm - 4:56 pm

BKK

STL

37h 01m3 stops

$904United Airlines

Mon, Feb 2 - Wed, Mar 4

11:20 am - 12:20 am

STL

BKK

48h 00m2 stops

9:10 am - 12:29 pm

BKK

STL

40h 19m2 stops

$906ANA

Sun, Jan 25 - Mon, Feb 9

4:35 pm - 12:20 am

STL

BKK

42h 45m2 stops

4:55 pm - 8:55 pm

BKK

STL

41h 00m3 stops

$910United Airlines

Tue, Feb 3 - Wed, Mar 4

6:45 am - 12:20 am

STL

BKK

28h 35m2 stops

4:55 pm - 10:25 pm

BKK

STL

42h 30m2 stops

$916United Airlines

Mon, Feb 2 - Thu, Mar 5

5:00 pm - 11:25 am

STL

BKK

53h 25m2 stops

4:55 pm - 2:42 pm

BKK

STL

34h 47m3 stops

$917United Airlines

Wed, Feb 4 - Wed, Mar 4

10:07 am - 12:20 am

STL

BKK

49h 13m2 stops

4:55 pm - 10:25 pm

BKK

STL

42h 30m2 stops

$922United Airlines

Tue, Feb 3 - Thu, Mar 5

8:05 am - 5:10 am

STL

BKK

32h 05m2 stops

10:25 pm - 12:29 pm

BKK

STL

27h 04m2 stops

$926ANA

Thu, Jan 22 - Mon, Jan 26

ANA flights from St. Louis to Bangkok

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

ANA

Jan 20

STL11:20 amLambert-St Louis

30h 10m

2 stops

BKK6:30 amBangkok Suvarnabhumi

Jan 27

BKK10:25 pmBangkok Suvarnabhumi

27h 04m

2 stops

STL12:29 pmLambert-St Louis

$883

Find similar

ANA

Jan 25

STL11:20 amLambert-St Louis

48h 00m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Feb 9

BKK9:10 amBangkok Suvarnabhumi

40h 19m

2 stops

STL12:29 pmLambert-St Louis

$906

Find similar

ANA

Jan 22

STL8:05 amLambert-St Louis

32h 05m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Jan 26

BKK10:25 pmBangkok Suvarnabhumi

27h 04m

2 stops

STL12:29 pmLambert-St Louis

$926

Find similar

United Airlines flights from St. Louis to Bangkok

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

United Airlines

Feb 9

STL8:05 amLambert-St Louis

32h 05m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Feb 17

BKK7:10 amBangkok Suvarnabhumi

26h 16m

2 stops

STL8:26 pmLambert-St Louis

$888

Find similar

United Airlines

Apr 1

STL7:45 amLambert-St Louis

28h 10m

2 stops

BKK11:55 pmBangkok Suvarnabhumi

Apr 30

BKK7:00 amBangkok Suvarnabhumi

34h 47m

2 stops

STL5:47 amLambert-St Louis

$899

Find similar

United Airlines

Feb 2

STL6:45 amLambert-St Louis

28h 35m

2 stops

BKK12:20 amBangkok Suvarnabhumi

Mar 4

BKK4:55 pmBangkok Suvarnabhumi

37h 01m

3 stops

STL4:56 pmLambert-St Louis

$904

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 1/20

11:20 am-6:30 am

2 stops30h 10m

Bangkok Suvarnabhumi

Tue 1/27

10:25 pm-12:29 pm

2 stops27h 04m

$883

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/9

8:05 am-5:10 am

2 stops32h 05m

Bangkok Suvarnabhumi

Tue 2/17

7:10 am-8:26 pm

2 stops26h 16m

$888

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

7:45 am-11:55 pm

2 stops28h 10m

Bangkok Suvarnabhumi

Thu 4/30

7:00 am-5:47 am

2 stops34h 47m

$899

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/2

6:45 am-12:20 am

2 stops28h 35m

Bangkok Suvarnabhumi

Wed 3/4

4:55 pm-4:56 pm

3 stops37h 01m

$904

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 1/25

11:20 am-12:20 am

2 stops48h 00m

Bangkok Suvarnabhumi

Mon 2/9

9:10 am-12:29 pm

2 stops40h 19m

$906

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/3

4:35 pm-12:20 am

2 stops42h 45m

Bangkok Suvarnabhumi

Wed 3/4

4:55 pm-8:55 pm

3 stops41h 00m

$910

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/2

6:45 am-12:20 am

2 stops28h 35m

Bangkok Suvarnabhumi

Thu 3/5

4:55 pm-10:25 pm

2 stops42h 30m

$916

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/4

5:00 pm-11:25 am

2 stops53h 25m

Bangkok Suvarnabhumi

Wed 3/4

4:55 pm-2:42 pm

3 stops34h 47m

$917

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 2/3

10:07 am-12:20 am

2 stops49h 13m

Bangkok Suvarnabhumi

Thu 3/5

4:55 pm-10:25 pm

2 stops42h 30m

$922

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 1/22

8:05 am-5:10 am

2 stops32h 05m

Bangkok Suvarnabhumi

Mon 1/26

10:25 pm-12:29 pm

2 stops27h 04m

$926

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 September, then book flights to Bangkok from St. Louis during January instead. Flights to Bangkok in January, while not as cheap as those in September, still average around $1,114.

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 $1,313 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 10m
Direct flights	None

The fastest flight from St. Louis to Bangkok takes 26h 10m

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 10m 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 December 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 3,677 reviews	Search Qatar Airways flights
Japan Airlines	PriceFrom $966	Free Cancellation	Rating 8.3 1,652 reviews	Search Japan Airlines flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
United Airlines	PriceFrom $984	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $991	Free Cancellation	Rating 7.6 1,093 reviews	Search Cathay Pacific flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,021 reviews	Search ANA flights
Delta	PriceFrom $1,058	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
Air Canada	PriceFrom $1,176	Free Cancellation	Rating 7.1 10,514 reviews	Search Air Canada flights
Finnair	PriceFrom $1,340	Free Cancellation	Rating 7.6 1,334 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.