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

Delta, United Airlines, and Qatar Airways are the most popular carriers operating from Lambert-St Louis to Thailand

What airlines fly to Thailand?

United Airlines, Cathay Pacific and Delta are the top three most popular airlines that fly to Thailand from St. Louis according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 9 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 9 as of October 2025.

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.

$438 Cheap Flights from St. Louis to Thailand in 2025/26

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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.

4:14 pm - 12:35 pmSTL-BKK

31h 21m2 stops

1:45 pm - 11:54 pmBKK-STL

23h 09m2 stops

$844Multiple Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 24

7:00 am - 4:30 pmSTL-BKK

44h 30m2 stops

5:40 pm - 11:59 pmBKK-STL

43h 19m2 stops

$849Multiple Airlines

Find Deal

Wed, Nov 5 - Wed, Nov 12

12:58 pm - 5:05 amSTL-BKK

27h 07m2 stops

1:10 am - 11:09 pmBKK-STL

33h 59m2 stops

$955Japan Airlines

Find Deal

Wed, Feb 18 - Tue, Mar 17

6:09 pm - 12:45 amSTL-BKK

41h 36m2 stops

9:30 pm - 11:29 pmBKK-STL

38h 59m2 stops

$971Delta

Find Deal

Sun, Nov 16 - Tue, Dec 2

7:00 am - 12:45 amSTL-BKK

28h 45m2 stops

9:40 am - 11:10 pmBKK-STL

26h 30m2 stops

$978Delta

Find Deal

Mon, Feb 16 - Mon, Feb 23

3:20 pm - 4:25 pmSTL-BKK

36h 05m2 stops

1:10 am - 11:08 pmBKK-STL

34h 58m2 stops

$985Japan Airlines

Find Deal

Wed, Jan 7 - Tue, Mar 3

2:45 pm - 11:25 amSTL-BKK

31h 40m3 stops

4:55 pm - 12:49 pmBKK-STL

32h 54m3 stops

$998United Airlines

Find Deal

Mon, Feb 16 - Wed, Feb 25

6:00 am - 5:10 amSTL-BKK

34h 10m2 stops

4:55 pm - 4:52 pmBKK-STL

35h 57m3 stops

$999United Airlines

Find Deal

Thu, Feb 26 - Mon, Mar 23

5:49 pm - 10:40 amSTL-BKK

27h 51m2 stops

11:40 am - 4:57 pmBKK-STL

42h 17m2 stops

$1,002Cathay Pacific

Find Deal

Wed, Feb 25 - Sun, Mar 8

7:00 am - 11:20 amSTL-HKT

39h 20m2 stops

6:35 pm - 11:57 pmHKT-STL

42h 22m2 stops

$1,002Cathay Pacific

Find Deal

Tue, Nov 18 - Wed, Dec 3

Japan Airlines flights from St. Louis to Thailand

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

Japan Airlines

Feb 18

STL12:58 pmLambert-St Louis

27h 07m

2 stops

BKK5:05 amBangkok Suvarnabhumi

Mar 17

BKK1:10 amBangkok Suvarnabhumi

33h 59m

2 stops

STL11:09 pmLambert-St Louis

$955

Find similar

Japan Airlines

Jan 7

STL3:20 pmLambert-St Louis

36h 05m

2 stops

BKK4:25 pmBangkok Suvarnabhumi

Mar 3

BKK1:10 amBangkok Suvarnabhumi

34h 58m

2 stops

STL11:08 pmLambert-St Louis

$985

Find similar

Delta flights from St. Louis to Thailand

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

Delta

Nov 16

STL6:09 pmLambert-St Louis

41h 36m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Dec 2

BKK9:30 pmBangkok Suvarnabhumi

38h 59m

2 stops

STL11:29 pmLambert-St Louis

$971

Find similar

Delta

Feb 16

STL7:00 amLambert-St Louis

28h 45m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 23

BKK9:40 amBangkok Suvarnabhumi

26h 30m

2 stops

STL11:10 pmLambert-St Louis

$978

Find similar

Delta

Feb 15

STL10:45 amLambert-St Louis

49h 00m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 26

BKK9:40 amBangkok Suvarnabhumi

26h 30m

2 stops

STL11:10 pmLambert-St Louis

$984

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 11/13

4:14 pm-12:35 pm

2 stops31h 21m

Bangkok Suvarnabhumi

Mon 11/24

1:45 pm-11:54 pm

2 stops23h 09m

$844

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 11/5

7:00 am-4:30 pm

2 stops44h 30m

Bangkok Suvarnabhumi

Wed 11/12

5:40 pm-11:59 pm

2 stops43h 19m

$849

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/18

12:58 pm-5:05 am

2 stops27h 07m

Bangkok Suvarnabhumi

Tue 3/17

1:10 am-11:09 pm

2 stops33h 59m

$955

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 11/16

6:09 pm-12:45 am

2 stops41h 36m

Bangkok Suvarnabhumi

Tue 12/2

9:30 pm-11:29 pm

2 stops38h 59m

$971

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/16

7:00 am-12:45 am

2 stops28h 45m

Bangkok Suvarnabhumi

Mon 2/23

9:40 am-11:10 pm

2 stops26h 30m

$978

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 1/7

3:20 pm-4:25 pm

2 stops36h 05m

Bangkok Suvarnabhumi

Tue 3/3

1:10 am-11:08 pm

2 stops34h 58m

$985

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 2/16

2:45 pm-11:25 am

3 stops31h 40m

Bangkok Suvarnabhumi

Wed 2/25

4:55 pm-12:49 pm

3 stops32h 54m

$998

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 2/26

6:00 am-5:10 am

2 stops34h 10m

Bangkok Suvarnabhumi

Mon 3/23

4:55 pm-4:52 pm

3 stops35h 57m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 2/25

5:49 pm-10:40 am

2 stops27h 51m

Bangkok Suvarnabhumi

Sun 3/8

11:40 am-4:57 pm

2 stops42h 17m

$1,002

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Tue 11/18

7:00 am-11:20 am

2 stops39h 20m

Phuket City

Wed 12/3

6:35 pm-11:57 pm

2 stops42h 22m

$1,002

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 September is, on average, the cheapest month to fly to Thailand from St. Louis, with most prices found around $1,084. If you are unable to visit Thailand during the month of September, then departing from St. Louis during the month October is also very affordable. Most momondo users find prices during this month for around $1,119.

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

The cheapest day to depart on your flight to Thailand is on a Monday when prices can be found for as low as $1,334. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Thailand is Thursday, with ticket prices averaging around $1,546.

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

Flying to Thailand from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,339 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Thailand is at noon when prices are around $1,754.

How far in advance should I book a flight 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 $1,279 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 $991 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

Direct flights	None

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

Search flight deals

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 9 as of October 2025.
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
Qatar Airways	PriceFrom $897	Free Cancellation	Rating 7.4 3,649 reviews	Search Qatar Airways flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,044 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $985	Free Cancellation	Rating 8.3 1,578 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $986	Free Cancellation	Rating 7.4 8,977 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 984 reviews	Search ANA flights
Delta	PriceFrom $1,058	Free Cancellation	Rating 7.9 7,977 reviews	Search Delta flights
Air Canada	PriceFrom $1,176	Free Cancellation	Rating 7.1 10,297 reviews	Search Air Canada flights
Cathay Pacific	PriceFrom $1,177	Free Cancellation	Rating 7.6 1,023 reviews	Search Cathay Pacific flights
Finnair	PriceFrom $1,289	Free Cancellation	Rating 7.6 1,332 reviews	Search Finnair 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.