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

Japan Airlines, United Airlines, and Korean Air are the most popular carriers 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 46% of people opting to fly with this airline when traveling to Bangkok. Keep in mind that there are 9 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 9 as of November 2025.

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.

$424 Cheap Flights from St. Louis to Bangkok in 2025/26

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 $1,141 to $1,324. The lowest price recently found on this route was $846.

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Find the cheapest flights from St. Louis to Bangkok

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:14 pm - 4:30 pmSTL-BKK

35h 16m2 stops

1:45 pm - 11:54 pmBKK-STL

23h 09m2 stops

$846Multiple Airlines

Find Deal

Mon, Nov 17 - Sun, Nov 23

7:00 am - 4:30 pmSTL-BKK

44h 30m2 stops

1:45 pm - 11:54 pmBKK-STL

23h 09m2 stops

$854Multiple Airlines

Find Deal

Sun, Nov 16 - Sun, Nov 23

2:50 pm - 4:30 pmSTL-BKK

36h 40m2 stops

5:40 pm - 1:54 pmBKK-STL

57h 14m2 stops

$875Multiple Airlines

Find Deal

Mon, Jan 12 - Wed, Jan 21

5:34 pm - 12:55 amSTL-BKK

42h 21m2 stops

9:30 pm - 11:29 pmBKK-STL

38h 59m2 stops

$965Delta

Find Deal

Mon, Nov 17 - Tue, Dec 2

7:04 am - 12:15 amSTL-BKK

28h 11m2 stops

7:55 am - 6:11 pmBKK-STL

23h 16m2 stops

$970Cathay Pacific

Find Deal

Wed, Jan 7 - Wed, Mar 4

5:55 pm - 2:05 pmSTL-BKK

31h 10m2 stops

7:15 pm - 9:48 pmBKK-STL

38h 33m2 stops

$974Cathay Pacific

Find Deal

Wed, Feb 25 - Sun, Mar 8

6:55 pm - 12:45 amSTL-BKK

40h 50m2 stops

12:55 am - 9:38 pmBKK-STL

33h 43m2 stops

$978Delta

Find Deal

Mon, Jan 12 - Mon, Feb 2

7:00 am - 5:00 amSTL-BKK

33h 00m2 stops

10:05 pm - 1:29 pmBKK-STL

28h 24m2 stops

$989Japan Airlines

Find Deal

Tue, Dec 2 - Wed, Dec 10

8:30 am - 11:25 amSTL-BKK

37h 55m3 stops

4:55 pm - 3:52 pmBKK-STL

35h 57m3 stops

$998United Airlines

Find Deal

Thu, Jan 15 - Mon, Feb 2

8:00 am - 5:10 amSTL-BKK

33h 10m2 stops

4:55 pm - 10:21 amBKK-STL

29h 26m3 stops

$999United Airlines

Find Deal

Mon, Mar 9 - Wed, Mar 25

Delta flights from St. Louis to Bangkok

Our best Delta deals on St. Louis to Bangkok flight tickets

Delta

Nov 17

STL5:34 pmLambert-St Louis

42h 21m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Dec 2

BKK9:30 pmBangkok Suvarnabhumi

38h 59m

2 stops

STL11:29 pmLambert-St Louis

$965

Find similar

Delta

Jan 12

STL6:55 pmLambert-St Louis

40h 50m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 2

BKK12:55 amBangkok Suvarnabhumi

33h 43m

2 stops

STL9:38 pmLambert-St Louis

$978

Find similar

Delta

Jan 18

STL10:19 amLambert-St Louis

49h 26m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 3

BKK9:40 amBangkok Suvarnabhumi

26h 45m

2 stops

STL11:25 pmLambert-St Louis

$984

Find similar

Cathay Pacific flights from St. Louis to Bangkok

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

Cathay Pacific

Jan 7

STL7:04 amLambert-St Louis

28h 11m

2 stops

BKK12:15 amBangkok Suvarnabhumi

Mar 4

BKK7:55 amBangkok Suvarnabhumi

23h 16m

2 stops

STL6:11 pmLambert-St Louis

$970

Find similar

Cathay Pacific

Feb 25

STL5:55 pmLambert-St Louis

31h 10m

2 stops

BKK2:05 pmBangkok Suvarnabhumi

Mar 8

BKK7:15 pmBangkok Suvarnabhumi

38h 33m

2 stops

STL9:48 pmLambert-St Louis

$974

Find similar

Cathay Pacific

Jan 16

STL11:05 amLambert-St Louis

24h 10m

2 stops

BKK12:15 amBangkok Suvarnabhumi

Feb 3

BKK11:40 amBangkok Suvarnabhumi

24h 19m

2 stops

STL10:59 pmLambert-St Louis

$1,057

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 11/17

4:14 pm-4:30 pm

2 stops35h 16m

Bangkok Suvarnabhumi

Sun 11/23

1:45 pm-11:54 pm

2 stops23h 09m

$846

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 11/16

7:00 am-4:30 pm

2 stops44h 30m

Bangkok Suvarnabhumi

Sun 11/23

1:45 pm-11:54 pm

2 stops23h 09m

$854

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/12

2:50 pm-4:30 pm

2 stops36h 40m

Bangkok Suvarnabhumi

Wed 1/21

5:40 pm-1:54 pm

2 stops57h 14m

$875

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 11/17

5:34 pm-12:55 am

2 stops42h 21m

Bangkok Suvarnabhumi

Tue 12/2

9:30 pm-11:29 pm

2 stops38h 59m

$965

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

7:04 am-12:15 am

2 stops28h 11m

Bangkok Suvarnabhumi

Wed 3/4

7:55 am-6:11 pm

2 stops23h 16m

$970

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

5:55 pm-2:05 pm

2 stops31h 10m

Bangkok Suvarnabhumi

Sun 3/8

7:15 pm-9:48 pm

2 stops38h 33m

$974

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/12

6:55 pm-12:45 am

2 stops40h 50m

Bangkok Suvarnabhumi

Mon 2/2

12:55 am-9:38 pm

2 stops33h 43m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 12/2

7:00 am-5:00 am

2 stops33h 00m

Bangkok Suvarnabhumi

Wed 12/10

10:05 pm-1:29 pm

2 stops28h 24m

$989

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 1/15

8:30 am-11:25 am

3 stops37h 55m

Bangkok Suvarnabhumi

Mon 2/2

4:55 pm-3:52 pm

3 stops35h 57m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 3/9

8:00 am-5:10 am

2 stops33h 10m

Bangkok Suvarnabhumi

Wed 3/25

4:55 pm-10:21 am

3 stops29h 26m

$999

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 September, then book flights to Bangkok from St. Louis during October instead. Flights to Bangkok in October, while not as cheap as those in September, still average around $1,119.

What is the cheapest day to depart on your flight to Bangkok?

On average, the least expensive day to fly to Bangkok from St. Louis is on a Monday. momondo users have found tickets for Monday departures for as low as $1,334. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Bangkok on a Thursday will generally be more expensive and average around $1,546. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Bangkok?

According to our data, the cheapest time of day to fly to Bangkok is in the morning. momondo users have found flights departing from St. Louis to Bangkok in the morning for as low as $1,339. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $1,754. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight 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 $1,280 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 $991 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

Direct flights	None

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

Search flight deals

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 24h 10m 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 9 as of November 2025.
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
Qatar Airways	PriceFrom $897	Free Cancellation	Rating 7.4 3,659 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,034 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $985	Free Cancellation	Rating 8.3 1,602 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $986	Free Cancellation	Rating 7.4 8,996 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,000 reviews	Search ANA flights
Delta	PriceFrom $1,058	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
Cathay Pacific	PriceFrom $1,171	Free Cancellation	Rating 7.6 1,049 reviews	Search Cathay Pacific flights
Air Canada	PriceFrom $1,176	Free Cancellation	Rating 7.1 10,397 reviews	Search Air Canada flights
Finnair	PriceFrom $1,289	Free Cancellation	Rating 7.6 1,335 reviews	Search Finnair 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.