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 45% 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.

$379 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 $1,032 to $1,176. The lowest price recently found on this route was $884.

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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.

1:15 pm - 6:30 am

STL

BKK

28h 15m2 stops

10:25 pm - 3:52 pm

BKK

STL

30h 27m2 stops

$884ANA

Mon, Jan 19 - Mon, Feb 2

8:30 am - 9:45 am

STL

BKK

37h 15m2 stops

9:35 am - 9:55 pm

BKK

STL

48h 20m2 stops

$894United Airlines

Thu, Apr 30 - Sun, May 31

9:55 am - 11:25 am

STL

BKK

36h 30m3 stops

4:55 pm - 2:43 pm

BKK

STL

34h 48m3 stops

$901United Airlines

Mon, Feb 23 - Thu, Mar 5

6:00 am - 12:20 am

STL

BKK

29h 20m2 stops

4:55 pm - 12:27 pm

BKK

STL

32h 32m3 stops

$905United Airlines

Mon, Feb 23 - Thu, Mar 5

6:45 am - 11:25 am

STL

BKK

39h 40m2 stops

4:55 pm - 2:30 pm

BKK

STL

34h 35m3 stops

$910United Airlines

Mon, Jan 19 - Mon, Feb 2

8:30 am - 9:45 am

STL

BKK

37h 15m2 stops

3:40 pm - 5:50 am

BKK

STL

26h 10m2 stops

$913United Airlines

Mon, Apr 13 - Mon, Apr 20

6:10 am - 12:55 am

STL

BKK

29h 45m2 stops

2:05 am - 11:25 pm

BKK

STL

34h 20m2 stops

$915Delta

Sat, Jan 24 - Sun, Feb 8

5:04 pm - 12:55 am

STL

BKK

42h 51m2 stops

2:05 am - 11:37 pm

BKK

STL

34h 32m2 stops

$921Delta

Wed, Jan 21 - Tue, Feb 3

4:30 pm - 11:25 am

STL

BKK

29h 55m2 stops

4:55 pm - 12:27 pm

BKK

STL

32h 32m2 stops

$942Multiple Airlines

Mon, Feb 23 - Thu, Mar 5

3:11 pm - 11:25 am

STL

BKK

31h 14m3 stops

4:55 pm - 12:29 pm

BKK

STL

32h 34m3 stops

$944United Airlines

Mon, Jan 26 - Thu, Jan 29

ANA flights from St. Louis to Bangkok

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

ANA

Jan 19

STL1:15 pmLambert-St Louis

28h 15m

2 stops

BKK6:30 amBangkok Suvarnabhumi

Feb 2

BKK10:25 pmBangkok Suvarnabhumi

30h 27m

2 stops

STL3:52 pmLambert-St Louis

$884

Find similar

ANA

Dec 31

STL11:05 amLambert-St Louis

30h 25m

2 stops

BKK6:30 amBangkok Suvarnabhumi

Jan 6

BKK2:20 pmBangkok Suvarnabhumi

42h 07m

2 stops

STL7:27 pmLambert-St Louis

$5,530

Find similar

ANA

Dec 31

STL11:05 amLambert-St Louis

29h 05m

2 stops

BKK5:10 amBangkok Suvarnabhumi

Jan 6

BKK7:10 amBangkok Suvarnabhumi

23h 33m

2 stops

STL5:43 pmLambert-St Louis

$16,862

Find similar

Delta flights from St. Louis to Bangkok

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

Delta

Jan 24

STL6:10 amLambert-St Louis

29h 45m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Feb 8

BKK2:05 amBangkok Suvarnabhumi

34h 20m

2 stops

STL11:25 pmLambert-St Louis

$915

Find similar

Delta

Jan 21

STL5:04 pmLambert-St Louis

42h 51m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Feb 3

BKK2:05 amBangkok Suvarnabhumi

34h 32m

2 stops

STL11:37 pmLambert-St Louis

$921

Find similar

Delta

Feb 23

STL6:10 amLambert-St Louis

29h 35m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Mar 1

BKK12:55 amBangkok Suvarnabhumi

28h 47m

2 stops

STL4:42 pmLambert-St Louis

$961

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/19

1:15 pm-6:30 am

2 stops28h 15m

Bangkok Suvarnabhumi

Mon 2/2

10:25 pm-3:52 pm

2 stops30h 27m

$884

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 4/30

8:30 am-9:45 am

2 stops37h 15m

Bangkok Suvarnabhumi

Sun 5/31

9:35 am-9:55 pm

2 stops48h 20m

$894

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/23

9:55 am-11:25 am

3 stops36h 30m

Bangkok Suvarnabhumi

Thu 3/5

4:55 pm-2:43 pm

3 stops34h 48m

$901

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/23

6:00 am-12:20 am

2 stops29h 20m

Bangkok Suvarnabhumi

Thu 3/5

4:55 pm-12:27 pm

3 stops32h 32m

$905

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/19

6:45 am-11:25 am

2 stops39h 40m

Bangkok Suvarnabhumi

Mon 2/2

4:55 pm-2:30 pm

3 stops34h 35m

$910

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 4/13

8:30 am-9:45 am

2 stops37h 15m

Bangkok Suvarnabhumi

Mon 4/20

3:40 pm-5:50 am

2 stops26h 10m

$913

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 1/24

6:10 am-12:55 am

2 stops29h 45m

Bangkok Suvarnabhumi

Sun 2/8

2:05 am-11:25 pm

2 stops34h 20m

$915

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/21

5:04 pm-12:55 am

2 stops42h 51m

Bangkok Suvarnabhumi

Tue 2/3

2:05 am-11:37 pm

2 stops34h 32m

$921

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/23

4:30 pm-11:25 am

2 stops29h 55m

Bangkok Suvarnabhumi

Thu 3/5

4:55 pm-12:27 pm

2 stops32h 32m

$942

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

3:11 pm-11:25 am

3 stops31h 14m

Bangkok Suvarnabhumi

Thu 1/29

4:55 pm-12:29 pm

3 stops32h 34m

$944

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 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.

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 $1,309 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	29h 44m
Direct flights	None

The fastest flight from St. Louis to Bangkok takes 29h 44m

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 29h 44m 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 3,700 reviews	Search Qatar Airways flights
Japan Airlines	PriceFrom $966	Free Cancellation	Rating 8.3 1,663 reviews	Search Japan Airlines flights
Cathay Pacific	PriceFrom $979	Free Cancellation	Rating 7.6 1,112 reviews	Search Cathay Pacific flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,070 reviews	Search American Airlines flights
United Airlines	PriceFrom $984	Free Cancellation	Rating 7.4 9,122 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,050 reviews	Search ANA flights
Delta	PriceFrom $1,058	Free Cancellation	Rating 7.9 8,012 reviews	Search Delta flights
Air Canada	PriceFrom $1,280	Free Cancellation	Rating 7.1 10,571 reviews	Search Air Canada flights
Finnair	PriceFrom $1,356	Free Cancellation	Rating 7.6 1,343 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.