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

Qatar Airways is the most popular carrier operating from Lambert-St Louis to Thailand

What airlines fly to Thailand?

Cathay Pacific, United Airlines and Qatar Airways are the top three most popular airlines that fly to Thailand from St. Louis according to our data. Cathay Pacific is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 8 different airlines that fly to Thailand 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 Thailand?

Prices for flights from Lambert-St Louis Airport to Thailand are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Thailand?

The number of operators available for flights from Lambert-St Louis Airport to Thailand is 8 as of August 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Thailand?

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 Thailand.

What documentation or ID do you need to fly to Thailand?

The travel and health documents you'll need for your trip to Thailand 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 Thailand. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$515 Cheap Flights from St. Louis to Thailand in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Thailand

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

1:06 pm - 6:45 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 39m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl

3:55 pm - 3:51 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

35h 56m2 stops Abu Dhabi Zayed Intl Charlotte Douglas

$1,037Multiple Airlines

Sat, Oct 10 - Tue, Oct 20

1:20 pm - 6:15 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 55m2 stops Chicago O'Hare Intl Doha Hamad Intl

2:00 am - 6:22 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 22m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,065Qatar Airways

Sun, Nov 1 - Mon, Nov 23

11:32 am - 6:15 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 43m2 stops Chicago O'Hare Intl Doha Hamad Intl

3:00 am - 7:25 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 25m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,065Qatar Airways

Mon, Nov 2 - Mon, Nov 23

4:57 pm - 10:40 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 43m2 stops Dallas/Fort Worth Hong Kong Intl

7:55 am - 11:34 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

28h 39m2 stops Hong Kong Intl Dallas/Fort Worth

$1,175Cathay Pacific

Sun, Jan 10 - Sun, Feb 28

11:01 am - 12:10 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

25h 09m2 stops Chicago O'Hare Intl Hong Kong Intl

11:00 am - 11:43 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

24h 43m2 stops Hong Kong Intl Dallas/Fort Worth

$1,238Cathay Pacific

Fri, Sep 18 - Sun, Oct 4

5:36 pm - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 59m3 stops Chicago O'Hare Intl Los Angeles Los Angeles Hong Kong Intl

9:35 am - 6:43 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

45h 08m2 stops Tokyo Haneda San Francisco

$1,352United Airlines

Sat, Oct 10 - Tue, Oct 20

9:00 am - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

36h 35m3 stops Denver Intl Los Angeles Los Angeles Hong Kong Intl

3:45 pm - 10:10 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

30h 25m3 stops Hong Kong Intl Los Angeles Los Angeles Houston George Bush Intcntl

$1,362United Airlines

Mon, Oct 12 - Wed, Oct 21

9:00 am - 10:15 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

25h 15m2 stops Denver Intl Tokyo Narita

3:45 pm - 12:40 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

32h 55m1 stop Los Angeles Los Angeles

$1,425ANA

Sat, Oct 10 - Tue, Oct 20

1:29 pm - 4:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 06m2 stops Chicago O'Hare Intl Tokyo Haneda

3:45 pm - 12:40 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

32h 55m1 stop Los Angeles Los Angeles

$1,573ANA

Fri, Oct 9 - Thu, Oct 22

Cheap last minute flights

Enter your travel dates to find the best prices.

7:56 pm - 11:20 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 24m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

4:45 pm - 12:25 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

31h 40m2 stops Taipei City Taiwan Taoyuan Intl Los Angeles Los Angeles

$1,317Multiple Airlines

Sun, Aug 16 - Tue, Aug 18

7:56 pm - 11:20 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 24m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

4:45 pm - 1:35 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

32h 50m2 stops Taipei City Taiwan Taoyuan Intl Los Angeles Los Angeles

$1,467Multiple Airlines

Mon, Aug 17 - Wed, Aug 19

11:50 am - 10:20 amSTL Lambert-St Louis-CNX Chiang Mai

34h 30m2 stops Phoenix Sky Harbor Intl Taipei City Taiwan Taoyuan Intl

11:20 am - 11:50 pmCNX Chiang Mai-STL Lambert-St Louis

24h 30m2 stops Taipei City Taiwan Taoyuan Intl Phoenix Sky Harbor Intl

$1,623Multiple Airlines

Fri, Aug 14 - Fri, Aug 21

6:00 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 55m2 stops Chicago O'Hare Intl Tokyo Narita

3:45 pm - 3:38 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

35h 53m3 stops Hong Kong Intl Los Angeles Los Angeles Chicago O'Hare Intl

$1,657United Airlines

Mon, Aug 17 - Wed, Aug 19

2:20 pm - 10:20 amSTL Lambert-St Louis-CNX Chiang Mai

32h 00m3 stops Kansas City Phoenix Sky Harbor Intl Taipei City Taiwan Taoyuan Intl

11:20 am - 11:50 pmCNX Chiang Mai-STL Lambert-St Louis

24h 30m2 stops Taipei City Taiwan Taoyuan Intl Phoenix Sky Harbor Intl

$1,753Multiple Airlines

Fri, Aug 14 - Fri, Aug 21

7:25 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 30m2 stops Chicago O'Hare Intl Tokyo Narita

3:45 pm - 3:38 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

35h 53m3 stops Hong Kong Intl San Francisco Chicago O'Hare Intl

$2,051United Airlines

Sun, Aug 16 - Tue, Aug 18

7:00 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 55m2 stops Newark Tokyo Narita

3:45 pm - 3:38 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

59h 53m3 stops Hong Kong Intl San Francisco Chicago O'Hare Intl

$2,074United Airlines

Fri, Aug 14 - Sun, Aug 16

11:22 am - 11:15 amSTL Lambert-St Louis-CNX Chiang Mai

35h 53m3 stops Philadelphia Doha Hamad Intl Bangkok Suvarnabhumi

8:00 pm - 11:42 pmCNX Chiang Mai-STL Lambert-St Louis

39h 42m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Dallas/Fort Worth

$2,665Qatar Airways

Fri, Aug 14 - Fri, Aug 21

12:45 pm - 11:15 amSTL Lambert-St Louis-CNX Chiang Mai

34h 30m3 stops Dallas/Fort Worth Doha Hamad Intl Bangkok Suvarnabhumi

8:00 pm - 11:42 pmCNX Chiang Mai-STL Lambert-St Louis

39h 42m3 stops Bangkok Suvarnabhumi Doha Hamad Intl Dallas/Fort Worth

$8,613Qatar Airways

Sat, Aug 15 - Sun, Aug 23

12:59 pm - 4:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

27h 36m2 stops Chicago O'Hare Intl Tokyo Haneda

9:35 pm - 12:02 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

26h 27m2 stops Tokyo Haneda Chicago O'Hare Intl

$16,790ANA

Mon, Aug 17 - Wed, Aug 19

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Qatar Airways flights from St. Louis to Thailand

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

Qatar Airways

Oct 28

STL11:32 amLambert-St Louis

36h 43m

2 stops

BKK12:15 pmBangkok Suvarnabhumi

Nov 10

BKK3:00 amBangkok Suvarnabhumi

29h 22m

2 stops

STL7:22 pmLambert-St Louis

$1,065

Qatar Airways

Oct 4

STL11:01 amLambert-St Louis

31h 19m

2 stops

BKK6:20 amBangkok Suvarnabhumi

Oct 20

BKK8:00 pmBangkok Suvarnabhumi

36h 57m

2 stops

STL8:57 pmLambert-St Louis

$1,069

Qatar Airways

Oct 4

STL11:01 amLambert-St Louis

31h 19m

2 stops

BKK6:20 amBangkok Suvarnabhumi

Oct 18

BKK2:30 amBangkok Suvarnabhumi

30h 27m

2 stops

STL8:57 pmLambert-St Louis

$1,100

United Airlines flights from St. Louis to Thailand

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

United Airlines

Aug 20

STL6:59 pmLambert-St Louis

26h 36m

3 stops

BKK9:35 amBangkok Suvarnabhumi

Sep 5

BKK9:35 amBangkok Suvarnabhumi

38h 27m

2 stops

STL12:02 pmLambert-St Louis

$1,354

United Airlines

Aug 20

STL6:59 pmLambert-St Louis

26h 36m

3 stops

BKK9:35 amBangkok Suvarnabhumi

Nov 18

BKK9:10 amBangkok Suvarnabhumi

23h 13m

2 stops

STL7:23 pmLambert-St Louis

$1,363

United Airlines

Aug 20

STL1:36 pmLambert-St Louis

31h 59m

3 stops

BKK9:35 amBangkok Suvarnabhumi

Sep 5

BKK3:45 pmBangkok Suvarnabhumi

30h 27m

3 stops

STL10:12 amLambert-St Louis

$1,364

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

Sat 10/10

1:06 pm-6:45 am

2 stops29h 39m

Bangkok Suvarnabhumi

Tue 10/20

3:55 pm-3:51 pm

2 stops35h 56m

$1,037

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 11/1

1:20 pm-6:15 am

2 stops27h 55m

Bangkok Suvarnabhumi

Mon 11/23

2:00 am-6:22 pm

2 stops29h 22m

$1,065

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Mon 11/2

11:32 am-6:15 am

2 stops29h 43m

Bangkok Suvarnabhumi

Mon 11/23

3:00 am-7:25 pm

2 stops29h 25m

$1,065

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sun 1/10

4:57 pm-10:40 am

2 stops28h 43m

Bangkok Suvarnabhumi

Sun 2/28

7:55 am-11:34 pm

2 stops28h 39m

$1,175

Quickest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Fri 9/18

11:01 am-12:10 am

2 stops25h 09m

Bangkok Suvarnabhumi

Sun 10/4

11:00 am-11:43 pm

2 stops24h 43m

$1,238

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sat 10/10

5:36 pm-9:35 am

3 stops27h 59m

Bangkok Suvarnabhumi

Tue 10/20

9:35 am-6:43 pm

2 stops45h 08m

$1,352

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Mon 10/12

9:00 am-9:35 am

3 stops36h 35m

Bangkok Suvarnabhumi

Wed 10/21

3:45 pm-10:10 am

3 stops30h 25m

$1,362

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Sat 10/10

9:00 am-10:15 pm

2 stops25h 15m

Bangkok Suvarnabhumi

Tue 10/20

3:45 pm-12:40 pm

1 stop32h 55m

$1,425

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Fri 10/9

1:29 pm-4:35 am

2 stops27h 06m

Bangkok Suvarnabhumi

Thu 10/22

3:45 pm-12:40 pm

1 stop32h 55m

$1,573

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 Thailand

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 Thailand?

The month of February is, on average, the cheapest month to fly to Thailand from St. Louis, with most prices found around $1,037. If you are unable to visit Thailand during the month of February, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around $1,045.

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

You are more likely to see cheaper flights to Thailand from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Thailand for around $1,301 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Thailand from St. Louis for as low as $1,013 on momondo.

Cheap St. Louis to Thailand flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Thailand

Fastest flight time	25h 40m
Direct flights	None

The fastest flight from St. Louis to Thailand takes 25h 40m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Thailand

When did momondo last update prices for flights from Lambert-St Louis Airport to Thailand?
Prices for flights from Lambert-St Louis Airport to Thailand are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Thailand?
The number of operators available for flights from Lambert-St Louis Airport to Thailand is 8 as of August 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Thailand?
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 Thailand.
What documentation or ID do you need to fly to Thailand?
The travel and health documents you'll need for your trip to Thailand 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 Thailand. 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 Thailand

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $881	Free Cancellation	Rating 7.8 8,503 reviews	Search Delta flights
Cathay Pacific	PriceFrom $927	Free Cancellation	Rating 7.6 1,451 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,901 reviews	Search Japan Airlines flights
Qatar Airways	PriceFrom $946	Free Cancellation	Rating 7.4 3,744 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.1 11,920 reviews	Search American Airlines flights
United Airlines	PriceFrom $982	Free Cancellation	Rating 7.4 10,112 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.3 1,295 reviews	Search ANA flights
EVA Air	PriceFrom $1,048	Free Cancellation	Rating 8.5 1,515 reviews	Search EVA Air flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Thailand?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Thailand. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Thailand with flexible booking policies on momondo?

All flight searches from St. Louis to Thailand on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Thailand?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Thailand.

I’m not ready to book a flight from St. Louis to Thailand right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Thailand from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.