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

United Airlines is the most popular carrier operating from Lambert-St Louis to Bangkok

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 44% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 7 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 7 as of May 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.

$540 Cheap Flights from St. Louis to Bangkok in 2026

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 $1,484 to $1,250. The lowest price recently found on this route was $998.

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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.

7:44 am - 11:00 pm

STL

BKK

27h 16m

2 stops

9:35 pm - 2:17 pm

BKK

STL

28h 42m

2 stops

$998Multiple Airlines

Mon, Sep 14 - Tue, Sep 29

7:34 am - 11:50 pm

STL

BKK

28h 16m

2 stops

8:50 pm - 1:17 pm

BKK

STL

29h 27m

2 stops

$1,031Etihad Airways

Thu, Aug 20 - Wed, Nov 18

6:00 am - 11:50 pm

STL

BKK

29h 50m

2 stops

3:15 am - 8:03 pm

BKK

STL

28h 48m

2 stops

$1,038Multiple Airlines

Wed, Sep 2 - Fri, Sep 18

10:22 am - 6:45 am

STL

BKK

32h 23m

2 stops

8:45 pm - 8:03 pm

BKK

STL

35h 18m

2 stops

$1,039Multiple Airlines

Mon, Sep 7 - Wed, Sep 23

6:54 am - 11:50 pm

STL

BKK

28h 56m

2 stops

9:15 am - 5:34 pm

BKK

STL

44h 19m

2 stops

$1,092Etihad Airways

Wed, Aug 19 - Fri, Sep 4

9:47 am - 6:15 am

STL

BKK

32h 28m

2 stops

9:00 pm - 8:08 pm

BKK

STL

35h 08m

2 stops

$1,098Multiple Airlines

Sun, Oct 11 - Sat, Oct 24

6:55 am - 11:50 pm

STL

BKK

28h 55m

2 stops

9:00 pm - 8:04 pm

BKK

STL

35h 04m

2 stops

$1,099Multiple Airlines

Fri, Jul 24 - Fri, Jul 31

8:34 am - 11:50 pm

STL

BKK

27h 16m

2 stops

9:15 am - 5:34 pm

BKK

STL

44h 19m

2 stops

$1,154Etihad Airways

Wed, Aug 12 - Fri, Aug 21

7:34 am - 11:50 pm

STL

BKK

28h 16m

2 stops

8:45 pm - 5:34 pm

BKK

STL

32h 49m

2 stops

$1,158Multiple Airlines

Sat, Aug 8 - Wed, Aug 19

9:21 am - 6:45 am

STL

BKK

33h 24m

2 stops

8:45 pm - 7:42 pm

BKK

STL

34h 57m

2 stops

$1,159Multiple Airlines

Sat, Aug 8 - Wed, Aug 19

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Cathay Pacific flights from St. Louis to Bangkok

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

Cathay Pacific

May 6

STL12:27 pmLambert-St Louis

23h 43m

2 stops

BKK12:10 amBangkok Suvarnabhumi

May 20

BKK11:00 amBangkok Suvarnabhumi

23h 59m

2 stops

STL10:59 pmLambert-St Louis

$1,321

Cathay Pacific

Aug 13

STL6:54 pmLambert-St Louis

27h 06m

2 stops

BKK10:00 amBangkok Suvarnabhumi

Aug 22

BKK7:10 pmBangkok Suvarnabhumi

39h 15m

2 stops

STL10:25 pmLambert-St Louis

$1,355

Cathay Pacific

Aug 13

STL9:31 amLambert-St Louis

26h 39m

2 stops

BKK12:10 amBangkok Suvarnabhumi

Aug 22

BKK7:35 amBangkok Suvarnabhumi

28h 07m

2 stops

STL11:42 pmLambert-St Louis

$1,383

Etihad Airways flights from St. Louis to Bangkok

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

Etihad Airways

Aug 20

STL5:23 amLambert-St Louis

30h 27m

2 stops

BKK11:50 pmBangkok Suvarnabhumi

Nov 18

BKK8:30 amBangkok Suvarnabhumi

41h 47m

2 stops

STL1:17 pmLambert-St Louis

$1,031

Etihad Airways

Oct 9

STL5:30 amLambert-St Louis

36h 45m

2 stops

BKK6:15 amBangkok Suvarnabhumi

Oct 22

BKK9:45 amBangkok Suvarnabhumi

41h 45m

2 stops

STL3:30 pmLambert-St Louis

$1,092

Etihad Airways

Aug 12

STL8:34 amLambert-St Louis

27h 16m

2 stops

BKK11:50 pmBangkok Suvarnabhumi

Aug 21

BKK9:15 amBangkok Suvarnabhumi

44h 19m

2 stops

STL5:34 pmLambert-St Louis

$1,154

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/14

7:44 am-11:00 pm

2 stops27h 16m

Bangkok Suvarnabhumi

Tue 9/29

9:35 pm-2:17 pm

2 stops28h 42m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

7:34 am-11:50 pm

2 stops28h 16m

Bangkok Suvarnabhumi

Wed 11/18

8:50 pm-1:17 pm

2 stops29h 27m

$1,031

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/2

6:00 am-11:50 pm

2 stops29h 50m

Bangkok Suvarnabhumi

Fri 9/18

3:15 am-8:03 pm

2 stops28h 48m

$1,038

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 9/7

10:22 am-6:45 am

2 stops32h 23m

Bangkok Suvarnabhumi

Wed 9/23

8:45 pm-8:03 pm

2 stops35h 18m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/19

6:54 am-11:50 pm

2 stops28h 56m

Bangkok Suvarnabhumi

Fri 9/4

9:15 am-5:34 pm

2 stops44h 19m

$1,092

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/11

9:47 am-6:15 am

2 stops32h 28m

Bangkok Suvarnabhumi

Sat 10/24

9:00 pm-8:08 pm

2 stops35h 08m

$1,098

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Fri 7/24

6:55 am-11:50 pm

2 stops28h 55m

Bangkok Suvarnabhumi

Fri 7/31

9:00 pm-8:04 pm

2 stops35h 04m

$1,099

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 8/12

8:34 am-11:50 pm

2 stops27h 16m

Bangkok Suvarnabhumi

Fri 8/21

9:15 am-5:34 pm

2 stops44h 19m

$1,154

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 8/8

7:34 am-11:50 pm

2 stops28h 16m

Bangkok Suvarnabhumi

Wed 8/19

8:45 pm-5:34 pm

2 stops32h 49m

$1,158

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sat 8/8

9:21 am-6:45 am

2 stops33h 24m

Bangkok Suvarnabhumi

Wed 8/19

8:45 pm-7:42 pm

2 stops34h 57m

$1,159

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 February, then book flights to Bangkok from St. Louis during September instead. Flights to Bangkok in September, while not as cheap as those in February, still average around $212.

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 $1,276 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 $1,036 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	23h 43m
Direct flights	None

The fastest flight from St. Louis to Bangkok takes 23h 43m

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 23h 43m 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 7 as of May 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 7.9 8,459 reviews	Search Delta flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,805 reviews	Search Japan Airlines flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.1 11,672 reviews	Search American Airlines flights
Cathay Pacific	PriceFrom $974	Free Cancellation	Rating 7.6 1,313 reviews	Search Cathay Pacific flights
United Airlines	PriceFrom $983	Free Cancellation	Rating 7.4 9,683 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.3 1,205 reviews	Search ANA flights
Qatar Airways	PriceFrom $1,094	Free Cancellation	Rating 7.4 3,727 reviews	Search Qatar Airways 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.

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Cheap flights from St. Louis to Bangkok from $540

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 9/13. 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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Cathay Pacific flights from St. Louis to Bangkok

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

Etihad Airways flights from St. Louis to Bangkok

Our best Etihad Airways 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

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

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

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