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

Qatar Airways and Cathay Pacific are the most popular carriers 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 32% 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 September 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.

$526 Cheap Flights from St. Louis to Thailand in 2026/27

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.

1:29 pm - 7:25 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 56m2 stops Chicago O'Hare Intl Rome Fiumicino

12:15 pm - 1:45 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

38h 30m2 stops Rome Fiumicino Frankfurt am Main

$943Multiple Airlines

Wed, Oct 21 - Tue, Nov 3

7:29 am - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 26m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl

3:15 am - 8:57 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 42m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,038Multiple Airlines

Tue, Oct 13 - Wed, Oct 21

11:25 am - 6:40 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 15m2 stops Chicago O'Hare Intl Doha Hamad Intl

6:55 pm - 11:58 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

42h 03m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,045Qatar Airways

Wed, Feb 10 - Mon, Feb 22

11:25 am - 6:40 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 15m2 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

$1,049Qatar Airways

Wed, Feb 10 - Mon, Feb 22

7:26 am - 5:05 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

32h 39m2 stops Chicago O'Hare Intl Tokyo Haneda

9:50 am - 4:43 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

43h 53m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,117Japan Airlines

Wed, Nov 25 - Wed, Dec 9

11:14 am - 5:05 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 51m2 stops Chicago O'Hare Intl Tokyo Haneda

10:05 pm - 4:43 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

31h 38m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,118Japan Airlines

Wed, Nov 25 - Wed, Dec 9

7:29 am - 12:10 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 41m2 stops Chicago O'Hare Intl Hong Kong Intl

7:30 am - 10:15 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

27h 45m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,145Cathay Pacific

Wed, Oct 21 - Wed, Nov 4

7:30 am - 9:30 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

25h 00m2 stops Salt Lake City Incheon Intl

9:40 pm - 11:18 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

38h 38m2 stops Incheon Intl Minneapolis St Paul

$1,149Delta

Mon, Jan 11 - Wed, Jan 27

12:36 pm - 9:30 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

43h 54m2 stops Atlanta Hartsfield-Jackson Incheon Intl

9:50 am - 4:50 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

44h 00m2 stops Incheon Intl Detroit Metropolitan Wayne County

$1,149Delta

Wed, Dec 2 - Sun, Feb 7

11:31 am - 12:10 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

24h 39m2 stops Chicago O'Hare Intl Hong Kong Intl

7:30 am - 6:17 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

23h 47m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,195Cathay Pacific

Fri, Oct 23 - Tue, Nov 3

Cheap last minute flights

Enter your travel dates to find the best prices.

6:29 am - 8:55 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

38h 26m2 stops Seattle/Tacoma Intl Manila Ninoy Aquino Intl

1:25 pm - 11:59 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

46h 34m2 stops Manila Ninoy Aquino Intl Seattle/Tacoma Intl

$1,040Multiple Airlines

Sun, Sep 27 - Sun, Oct 4

11:01 am - 11:30 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

36h 29m2 stops Chicago O'Hare Intl Hong Kong Intl

5:30 pm - 8:57 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

39h 27m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,147Cathay Pacific

Sun, Sep 27 - Sat, Oct 10

1:29 pm - 11:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

46h 26m2 stops Chicago O'Hare Intl Tokyo Narita

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

32h 55m3 stops Hong Kong Intl Los Angeles Denver Intl

$1,173United Airlines

Sun, Sep 27 - Wed, Sep 30

4:39 pm - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 56m3 stops Denver Intl Los Angeles Hong Kong Intl

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

45h 08m2 stops Tokyo Haneda San Francisco

$1,209United Airlines

Sun, Sep 27 - Wed, Sep 30

6:29 am - 11:35 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 06m2 stops Seattle/Tacoma Intl Incheon Intl

3:00 am - 11:59 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

32h 59m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$1,214Multiple Airlines

Sat, Sep 26 - Sun, Sep 27

11:01 am - 5:45 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 44m2 stops Chicago O'Hare Intl Tokyo Haneda

12:30 am - 11:30 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

35h 00m2 stops Osaka Kansai Intl Los Angeles

$1,216Japan Airlines

Sun, Sep 27 - Tue, Sep 29

7:36 pm - 10:20 amSTL Lambert-St Louis-CNX Chiang Mai

26h 44m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

11:20 am - 11:59 pmCNX Chiang Mai-STL Lambert-St Louis

48h 39m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl

$1,230Multiple Airlines

Sun, Sep 27 - Sun, Oct 4

6:00 am - 10:15 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 15m2 stops Chicago O'Hare Intl Tokyo Narita

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

32h 55m1 stop Los Angeles

$1,270ANA

Thu, Sep 24 - Sat, Sep 26

6:29 am - 7:45 amSTL Lambert-St Louis-HKT Phuket City

37h 16m2 stops Seattle/Tacoma Intl Doha Hamad Intl

9:35 pm - 11:59 pmHKT Phuket City-STL Lambert-St Louis

38h 24m2 stops Doha Hamad Intl Seattle/Tacoma Intl

$1,358Qatar Airways

Sun, Sep 27 - Wed, Sep 30

6:15 am - 10:15 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 00m2 stops Houston George Bush Intcntl Tokyo Narita

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

32h 55m1 stop Los Angeles

$1,372ANA

Thu, Sep 24 - Sat, Sep 26

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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

Feb 10

STL11:25 amLambert-St Louis

30h 15m

2 stops

BKK6:40 amBangkok Suvarnabhumi

Feb 22

BKK6:55 pmBangkok Suvarnabhumi

39h 13m

2 stops

STL9:08 pmLambert-St Louis

$1,045

Qatar Airways

Feb 10

STL11:25 amLambert-St Louis

30h 15m

2 stops

BKK6:40 amBangkok Suvarnabhumi

Feb 22

BKK6:55 pmBangkok Suvarnabhumi

39h 13m

2 stops

STL9:08 pmLambert-St Louis

$1,049

Qatar Airways

Feb 28

STL7:29 amLambert-St Louis

34h 11m

2 stops

BKK6:40 amBangkok Suvarnabhumi

Apr 27

BKK2:30 amBangkok Suvarnabhumi

31h 47m

2 stops

STL10:17 pmLambert-St Louis

$1,057

Cathay Pacific flights from St. Louis to Thailand

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

Cathay Pacific

Oct 21

STL7:29 amLambert-St Louis

28h 41m

2 stops

BKK12:10 amBangkok Suvarnabhumi

Nov 4

BKK7:30 amBangkok Suvarnabhumi

27h 45m

2 stops

STL10:15 pmLambert-St Louis

$1,145

Cathay Pacific

Sep 27

STL11:01 amLambert-St Louis

36h 29m

2 stops

BKK11:30 amBangkok Suvarnabhumi

Oct 10

BKK5:30 pmBangkok Suvarnabhumi

39h 27m

2 stops

STL8:57 pmLambert-St Louis

$1,147

Cathay Pacific

Jan 15

STL5:57 amLambert-St Louis

40h 23m

2 stops

HKT11:20 amPhuket City

Jan 24

HKT12:20 pmPhuket City

41h 58m

2 stops

STL5:18 pmLambert-St Louis

$1,195

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/21

1:29 pm-7:25 am

2 stops29h 56m

Bangkok Suvarnabhumi

Tue 11/3

12:15 pm-1:45 pm

2 stops38h 30m

$943

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 10/13

7:29 am-11:55 pm

2 stops28h 26m

Bangkok Suvarnabhumi

Wed 10/21

3:15 am-8:57 pm

2 stops29h 42m

$1,038

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 2/10

11:25 am-6:40 am

2 stops30h 15m

Bangkok Suvarnabhumi

Mon 2/22

6:55 pm-11:58 pm

2 stops42h 03m

$1,045

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 2/10

11:25 am-6:40 am

2 stops30h 15m

Bangkok Suvarnabhumi

Mon 2/22

6:55 pm-9:08 pm

2 stops39h 13m

$1,049

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 11/25

7:26 am-5:05 am

2 stops32h 39m

Bangkok Suvarnabhumi

Wed 12/9

9:50 am-4:43 pm

2 stops43h 53m

$1,117

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 11/25

11:14 am-5:05 am

2 stops28h 51m

Bangkok Suvarnabhumi

Wed 12/9

10:05 pm-4:43 pm

2 stops31h 38m

$1,118

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/21

7:29 am-12:10 am

2 stops28h 41m

Bangkok Suvarnabhumi

Wed 11/4

7:30 am-10:15 pm

2 stops27h 45m

$1,145

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Mon 1/11

7:30 am-9:30 pm

2 stops25h 00m

Bangkok Suvarnabhumi

Wed 1/27

9:40 pm-11:18 pm

2 stops38h 38m

$1,149

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 12/2

12:36 pm-9:30 pm

2 stops43h 54m

Bangkok Suvarnabhumi

Sun 2/7

9:50 am-4:50 pm

2 stops44h 00m

$1,149

Quickest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Fri 10/23

11:31 am-12:10 am

2 stops24h 39m

Bangkok Suvarnabhumi

Tue 11/3

7:30 am-6:17 pm

2 stops23h 47m

$1,195

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 $1,043. 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 $1,329 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 $1,009 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

Best Price Found	$526
Fastest flight time	24h 44m
Direct flights	None

The best one-way flight to Thailand from St. Louis in the past 72 hours is $526. The best round-trip flight deal from St. Louis to Thailand found on momondo in the last 72 hours is $943.

The fastest flight from St. Louis to Thailand takes 24h 44m

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 September 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 8,590 reviews	Search Delta flights
Cathay Pacific	PriceFrom $927	Free Cancellation	Rating 7.6 1,492 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,920 reviews	Search Japan Airlines flights
Qatar Airways	PriceFrom $946	Free Cancellation	Rating 7.3 3,732 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $948	Free Cancellation	Rating 7.0 12,076 reviews	Search American Airlines flights
United Airlines	PriceFrom $982	Free Cancellation	Rating 7.4 10,226 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.3 1,319 reviews	Search ANA flights
EVA Air	PriceFrom $1,048	Free Cancellation	Rating 8.5 1,531 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.