What airlines fly to Bangkok?

United Airlines, Cathay Pacific and Qatar Airways 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 33% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 8 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 8 as of August 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.

$474 Cheap Flights from St. Louis to Bangkok in 2026

Discover deals from 900+ travel sites with momondo.

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.

5:00 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 55m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl

3:55 pm - 12:35 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

32h 40m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,037Multiple Airlines

Mon, Oct 12 - Wed, Oct 21

5:00 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 55m2 stops Charlotte Douglas Abu Dhabi Zayed Intl

3:55 pm - 8:57 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

41h 02m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,038Multiple Airlines

Wed, Oct 7 - Wed, Oct 14

6:33 am - 10:50 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 17m2 stops Chicago O'Hare Intl Tokyo Narita

7:10 am - 6:16 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

24h 06m2 stops Tokyo Narita Chicago O'Hare Intl

$1,076ANA

Tue, Dec 1 - Tue, Dec 15

7:02 am - 1:05 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

42h 03m2 stops Seattle/Tacoma Intl Doha Hamad Intl

3:00 am - 6:17 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

28h 17m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,126Qatar Airways

Wed, Oct 28 - Tue, Nov 10

1:20 pm - 11:35 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

45h 15m2 stops Chicago O'Hare Intl Tokyo Narita

9:50 am - 10:52 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

62h 02m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,128Japan Airlines

Sun, Nov 1 - Sun, Nov 8

5:00 am - 5:05 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

35h 05m2 stops Chicago O'Hare Intl Tokyo Haneda

7:55 am - 4:43 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

45h 48m2 stops Tokyo Narita Chicago O'Hare Intl

$1,128Japan Airlines

Wed, Jan 20 - Mon, Jan 25

1:06 pm - 6:15 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 09m2 stops Chicago O'Hare Intl Doha Hamad Intl

6:55 pm - 9:08 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

39h 13m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,140Qatar Airways

Thu, Feb 18 - Sun, Feb 28

7:18 pm - 12:45 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

40h 27m2 stops Atlanta Hartsfield-Jackson Incheon Intl

12:55 am - 5:00 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 05m2 stops Incheon Intl Detroit Metropolitan Wayne County

$1,149Delta

Sun, Nov 15 - Tue, Nov 24

7:18 pm - 1:25 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 07m2 stops Atlanta Hartsfield-Jackson Incheon Intl

9:40 am - 11:26 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

26h 46m2 stops Incheon Intl Minneapolis St Paul

$1,150Delta

Wed, Dec 2 - Tue, Dec 15

10:50 am - 5:10 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 20m2 stops Chicago O'Hare Intl Tokyo Haneda

10:25 pm - 10:42 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

25h 17m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,158ANA

Tue, Dec 1 - Sun, Dec 20

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Qatar Airways flights from St. Louis to Bangkok

Our best Qatar Airways deals on St. Louis to Bangkok flight tickets

Qatar Airways

Oct 28

STL7:02 amLambert-St Louis

42h 03m

2 stops

BKK1:05 pmBangkok Suvarnabhumi

Nov 10

BKK3:00 amBangkok Suvarnabhumi

28h 17m

2 stops

STL6:17 pmLambert-St Louis

$1,126

Qatar Airways

Feb 18

STL1:06 pmLambert-St Louis

28h 09m

2 stops

BKK6:15 amBangkok Suvarnabhumi

Feb 28

BKK6:55 pmBangkok Suvarnabhumi

39h 13m

2 stops

STL9:08 pmLambert-St Louis

$1,140

Qatar Airways

Oct 28

STL7:02 amLambert-St Louis

35h 38m

2 stops

BKK6:40 amBangkok Suvarnabhumi

Nov 11

BKK6:55 pmBangkok Suvarnabhumi

37h 27m

2 stops

STL7:22 pmLambert-St Louis

$1,147

United Airlines flights from St. Louis to Bangkok

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

United Airlines

Oct 28

STL8:50 amLambert-St Louis

38h 40m

3 stops

BKK11:30 amBangkok Suvarnabhumi

Nov 11

BKK9:10 amBangkok Suvarnabhumi

27h 14m

2 stops

STL11:24 pmLambert-St Louis

$1,159

United Airlines

Jan 5

STL1:30 pmLambert-St Louis

33h 00m

3 stops

BKK11:30 amBangkok Suvarnabhumi

Feb 10

BKK7:10 amBangkok Suvarnabhumi

25h 30m

2 stops

STL7:40 pmLambert-St Louis

$1,161

United Airlines

Oct 12

STL7:08 amLambert-St Louis

38h 27m

2 stops

BKK9:35 amBangkok Suvarnabhumi

Oct 21

BKK3:45 pmBangkok Suvarnabhumi

36h 52m

3 stops

STL4:37 pmLambert-St Louis

$1,163

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Mon 10/12

5:00 am-11:55 pm

2 stops30h 55m

Bangkok Suvarnabhumi

Wed 10/21

3:55 pm-12:35 pm

2 stops32h 40m

$1,037

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/7

5:00 am-11:55 pm

2 stops30h 55m

Bangkok Suvarnabhumi

Wed 10/14

3:55 pm-8:57 pm

2 stops41h 02m

$1,038

Quickest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 12/1

6:33 am-10:50 pm

2 stops27h 17m

Bangkok Suvarnabhumi

Tue 12/15

7:10 am-6:16 pm

2 stops24h 06m

$1,076

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/28

7:02 am-1:05 pm

2 stops42h 03m

Bangkok Suvarnabhumi

Tue 11/10

3:00 am-6:17 pm

2 stops28h 17m

$1,126

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 11/1

1:20 pm-11:35 pm

2 stops45h 15m

Bangkok Suvarnabhumi

Sun 11/8

9:50 am-10:52 am

2 stops62h 02m

$1,128

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 1/20

5:00 am-5:05 am

2 stops35h 05m

Bangkok Suvarnabhumi

Mon 1/25

7:55 am-4:43 pm

2 stops45h 48m

$1,128

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Thu 2/18

1:06 pm-6:15 am

2 stops28h 09m

Bangkok Suvarnabhumi

Sun 2/28

6:55 pm-9:08 pm

2 stops39h 13m

$1,140

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 11/15

7:18 pm-12:45 am

2 stops40h 27m

Bangkok Suvarnabhumi

Tue 11/24

12:55 am-5:00 pm

2 stops29h 05m

$1,149

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 12/2

7:18 pm-1:25 pm

2 stops29h 07m

Bangkok Suvarnabhumi

Tue 12/15

9:40 am-11:26 pm

2 stops26h 46m

$1,150

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 12/1

10:50 am-5:10 am

2 stops29h 20m

Bangkok Suvarnabhumi

Sun 12/20

10:25 pm-10:42 am

2 stops25h 17m

$1,158

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?

Prices are currently low for flights on this route.

Typical prices usually range from $1,094 to $1,440.
The lowest price recently found on this route was $1,037.

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of February, then book flights to Bangkok from St. Louis during August instead. Flights to Bangkok in August, while not as cheap as those in February, still average around $1,031.

How far in advance should I book a flight from St. Louis 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 $1,306 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 $1,013 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

Best Price Found	$474
Fastest flight time	30h 55m
Direct flights	None

The best one-way flight to Bangkok from St. Louis in the past 72 hours is $474. The best round-trip flight deal from St. Louis to Bangkok found on momondo in the last 72 hours is $1,037.

The fastest flight from St. Louis to Bangkok takes 30h 55m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Bangkok

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 30h 55m 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 8 as of August 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
Delta	PriceFrom $881	Free Cancellation	Rating 7.8 8,529 reviews	Search Delta flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,909 reviews	Search Japan Airlines flights
Qatar Airways	PriceFrom $946	Free Cancellation	Rating 7.4 3,732 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $948	Free Cancellation	Rating 7.1 11,995 reviews	Search American Airlines flights
Cathay Pacific	PriceFrom $974	Free Cancellation	Rating 7.6 1,460 reviews	Search Cathay Pacific flights
United Airlines	PriceFrom $982	Free Cancellation	Rating 7.4 10,123 reviews	Search United Airlines flights
ANA	PriceFrom $990	Free Cancellation	Rating 8.3 1,300 reviews	Search ANA flights
EVA Air	PriceFrom $1,048	Free Cancellation	Rating 8.5 1,522 reviews	Search EVA Air 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.

An easier way to manage your Bangkok trip

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Cheap flights from St. Louis to Bangkok from $474

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bangkok departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Qatar Airways flights from St. Louis to Bangkok

Our best Qatar Airways deals on St. Louis to Bangkok flight tickets

United Airlines flights from St. Louis to Bangkok

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

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Use the filters below to find and compare flights from St. Louis to Bangkok that are best for you.

See travel insights to Bangkok from

How to get the cheapest flight ticket from St. Louis to Bangkok

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

What is the cheapest month to fly to Bangkok?

How far in advance should I book a flight from St. Louis to Bangkok?

What airlines fly to Bangkok?

Cheap St. Louis to Bangkok flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Bangkok

Best airlines flying from St. Louis to Bangkok

Compare and see reviews for airlines that fly from St. Louis to Bangkok with momondo

Why use momondo?

An easier way to manage your Bangkok trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Thailand

Fly into one of these airports located in Bangkok

Airports listed have a maximum distance of 15.4 mi from Bangkok

Fly your favorite airline to Bangkok

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Popular cities in Thailand

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from St. Louis

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year