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

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

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 September 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.

$549 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.

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

29h 55m2 stops Washington, D.C. Reagan-National Abu Dhabi Zayed Intl

3:15 am - 12:27 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

33h 12m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,038Multiple Airlines

Fri, Sep 18 - Sat, Oct 3

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 - 4:53 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

36h 58m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,038Multiple Airlines

Tue, Sep 22 - Wed, Oct 7

7:27 am - 7:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

36h 08m2 stops Chicago O'Hare Intl Doha Hamad Intl

2:30 am - 12:27 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

33h 57m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,060Qatar Airways

Thu, Sep 17 - Wed, Sep 30

7:27 am - 12:55 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

41h 28m2 stops Chicago O'Hare Intl Doha Hamad Intl

3:00 am - 8:57 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 57m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,060Qatar Airways

Tue, Sep 22 - Tue, Oct 6

11:31 am - 3:10 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

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

7:55 am - 11:46 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

27h 51m2 stops Tokyo Narita Los Angeles

$1,118Japan Airlines

Wed, Oct 7 - Wed, Oct 14

7:29 am - 3:10 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

43h 41m2 stops Chicago O'Hare Intl Tokyo Haneda

7:55 am - 10:50 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

38h 55m2 stops Tokyo Narita Chicago O'Hare Intl

$1,125Japan Airlines

Wed, Oct 7 - Wed, Oct 14

5:00 am - 12:15 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 15m2 stops Chicago O'Hare Intl Hong Kong Intl

5:00 pm - 6:17 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

38h 17m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,145Cathay Pacific

Wed, Nov 25 - Sat, Dec 12

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

25h 00m2 stops Salt Lake City Incheon Intl

11:30 pm - 11:18 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

35h 48m2 stops Incheon Intl Minneapolis St Paul

$1,149Delta

Thu, Jan 21 - Sun, Apr 18

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

25h 00m2 stops Salt Lake City Incheon Intl

9:40 pm - 8:49 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

36h 09m2 stops Incheon Intl Atlanta Hartsfield-Jackson

$1,150Delta

Mon, Jan 11 - Wed, Jan 27

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

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

7:35 am - 11:46 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

28h 11m2 stops Hong Kong Intl Los Angeles

$1,195Cathay Pacific

Fri, Oct 9 - Thu, Oct 22

Cheap last minute flights

Enter your travel dates to find the best prices.

7:27 am - 12:55 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

29h 28m2 stops Chicago O'Hare Intl Abu Dhabi Zayed Intl

3:15 am - 12:27 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

33h 12m2 stops Abu Dhabi Zayed Intl Chicago O'Hare Intl

$1,038Multiple Airlines

Thu, Sep 10 - Wed, Sep 16

7:27 am - 6:20 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

34h 53m2 stops Chicago O'Hare Intl Doha Hamad Intl

8:00 pm - 12:27 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

40h 27m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,057Qatar Airways

Thu, Sep 10 - Thu, Sep 17

7:27 am - 6:20 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

34h 53m2 stops Chicago O'Hare Intl Doha Hamad Intl

8:00 pm - 12:27 amBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

40h 27m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,058Qatar Airways

Thu, Sep 10 - Thu, Sep 17

11:01 am - 6:20 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

31h 19m2 stops Chicago O'Hare Intl Doha Hamad Intl

3:00 am - 8:44 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

29h 44m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,060Qatar Airways

Thu, Sep 10 - Wed, Sep 16

7:36 pm - 12:00 pmSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 24m2 stops Seattle/Tacoma Intl Taipei City Taiwan Taoyuan Intl

5:50 pm - 2:21 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

56h 31m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl

$1,159STARLUX Airlines

Thu, Sep 10 - Sat, Sep 12

1:36 pm - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

31h 59m3 stops Denver Intl Los Angeles Hong Kong Intl

7:00 am - 9:36 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

26h 36m2 stops Tokyo Narita Chicago O'Hare Intl

$1,160United Airlines

Thu, Sep 10 - Thu, Sep 17

4:40 pm - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 55m3 stops Denver Intl Los Angeles Hong Kong Intl

7:00 am - 4:34 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

21h 34m2 stops Tokyo Narita Denver Intl

$1,161United Airlines

Thu, Sep 10 - Thu, Sep 17

4:40 pm - 9:35 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

28h 55m3 stops Denver Intl Los Angeles Hong Kong Intl

7:00 am - 8:47 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

25h 47m2 stops Tokyo Narita Newark

$1,161United Airlines

Thu, Sep 10 - Thu, Sep 17

6:00 am - 12:10 amSTL Lambert-St Louis-BKK Bangkok Suvarnabhumi

30h 10m2 stops Los Angeles Hong Kong Intl

12:25 pm - 1:25 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

37h 00m1 stop Frankfurt am Main

$3,686Multiple Airlines

Thu, Sep 10 - Sat, Sep 12

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

40h 15m3 stops Los Angeles Hong Kong Intl Kuala Lumpur Intl

11:00 am - 9:57 pmBKK Bangkok Suvarnabhumi-STL Lambert-St Louis

22h 57m2 stops Hong Kong Intl Dallas/Fort Worth

$6,083Multiple Airlines

Thu, Sep 10 - Thu, Sep 17

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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

Sep 10

STL7:27 amLambert-St Louis

34h 53m

2 stops

BKK6:20 amBangkok Suvarnabhumi

Sep 17

BKK8:00 pmBangkok Suvarnabhumi

40h 27m

2 stops

STL12:27 amLambert-St Louis

$1,057

Qatar Airways

Sep 10

STL7:27 amLambert-St Louis

34h 53m

2 stops

BKK6:20 amBangkok Suvarnabhumi

Sep 17

BKK8:00 pmBangkok Suvarnabhumi

40h 27m

2 stops

STL12:27 amLambert-St Louis

$1,058

Qatar Airways

Sep 22

STL7:27 amLambert-St Louis

41h 28m

2 stops

BKK12:55 pmBangkok Suvarnabhumi

Oct 6

BKK3:00 amBangkok Suvarnabhumi

29h 57m

2 stops

STL8:57 pmLambert-St Louis

$1,060

STARLUX Airlines flights from St. Louis to Bangkok

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

STARLUX Airlines

Oct 28

STL7:02 amLambert-St Louis

41h 33m

2 stops

BKK12:35 pmBangkok Suvarnabhumi

Nov 11

BKK5:40 pmBangkok Suvarnabhumi

43h 19m

2 stops

STL11:59 pmLambert-St Louis

$1,111

STARLUX Airlines

Oct 23

STL4:42 pmLambert-St Louis

31h 53m

2 stops

BKK12:35 pmBangkok Suvarnabhumi

Nov 3

BKK5:40 pmBangkok Suvarnabhumi

57h 45m

2 stops

STL2:25 pmLambert-St Louis

$1,112

STARLUX Airlines

Oct 23

STL4:42 pmLambert-St Louis

31h 53m

2 stops

BKK12:35 pmBangkok Suvarnabhumi

Nov 3

BKK5:40 pmBangkok Suvarnabhumi

57h 45m

2 stops

STL2:25 pmLambert-St Louis

$1,113

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Fri 9/18

6:00 am-11:55 pm

2 stops29h 55m

Bangkok Suvarnabhumi

Sat 10/3

3:15 am-12:27 am

2 stops33h 12m

$1,038

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 9/22

5:00 am-11:55 pm

2 stops30h 55m

Bangkok Suvarnabhumi

Wed 10/7

3:55 pm-4:53 pm

2 stops36h 58m

$1,038

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Thu 9/17

7:27 am-7:35 am

2 stops36h 08m

Bangkok Suvarnabhumi

Wed 9/30

2:30 am-12:27 am

2 stops33h 57m

$1,060

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Tue 9/22

7:27 am-12:55 pm

2 stops41h 28m

Bangkok Suvarnabhumi

Tue 10/6

3:00 am-8:57 pm

2 stops29h 57m

$1,060

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/7

11:31 am-3:10 pm

2 stops39h 39m

Bangkok Suvarnabhumi

Wed 10/14

7:55 am-11:46 pm

2 stops27h 51m

$1,118

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 10/7

7:29 am-3:10 pm

2 stops43h 41m

Bangkok Suvarnabhumi

Wed 10/14

7:55 am-10:50 am

2 stops38h 55m

$1,125

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Wed 11/25

5:00 am-12:15 am

2 stops30h 15m

Bangkok Suvarnabhumi

Sat 12/12

5:00 pm-6:17 pm

2 stops38h 17m

$1,145

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Thu 1/21

7:30 am-9:30 pm

2 stops25h 00m

Bangkok Suvarnabhumi

Sun 4/18

11:30 pm-11:18 pm

2 stops35h 48m

$1,149

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-8:49 pm

2 stops36h 09m

$1,150

Quickest round-trip

St. LouisBangkok

STL Lambert-St Louis - BKK Bangkok Suvarnabhumi

STLBKK

Lambert-St Louis

Fri 10/9

11:31 am-12:10 am

2 stops24h 39m

Bangkok Suvarnabhumi

Thu 10/22

7:35 am-11:46 pm

2 stops28h 11m

$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 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 $1,115 to $1,504.
The lowest price recently found on this route was $1,038.

What is the cheapest month to fly to Bangkok?

If you aren’t able to travel during the month of August, then book flights to Bangkok from St. Louis during February instead. Flights to Bangkok in February, while not as cheap as those in August, still average around $1,024.

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 $1,307 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	$549
Fastest flight time	25h 00m
Direct flights	None

The best one-way flight to Bangkok from St. Louis in the past 72 hours is $549. The best round-trip flight deal from St. Louis to Bangkok found on momondo in the last 72 hours is $1,038.

The fastest flight from St. Louis to Bangkok takes 25h 00m

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 25h 00m 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 September 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 8,548 reviews	Search Delta flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,910 reviews	Search Japan Airlines flights
Qatar Airways	PriceFrom $946	Free Cancellation	Rating 7.3 3,734 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $948	Free Cancellation	Rating 7.1 12,042 reviews	Search American Airlines flights
Cathay Pacific	PriceFrom $974	Free Cancellation	Rating 7.6 1,473 reviews	Search Cathay Pacific flights
United Airlines	PriceFrom $982	Free Cancellation	Rating 7.4 10,180 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.3 1,312 reviews	Search ANA flights
EVA Air	PriceFrom $1,048	Free Cancellation	Rating 8.5 1,521 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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Fly into one of these airports located in Bangkok

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Cheap flights from St. Louis to Bangkok from $549

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 2/4. 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

STARLUX Airlines flights from St. Louis to Bangkok

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

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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 is the cheapest airline that flies from Lambert-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

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

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According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year