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 42% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 10 different airlines that fly to Thailand on a routine basis, so you have a few additional options to choose from.

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

Cathay Pacific is the most popular carrier operating from Lambert-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 10 as of January 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.

$426 Cheap Flights from St. Louis to Thailand in 2026

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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.

6:00 am - 12:45 am

STL

BKK

29h 45m

2 stops

2:05 am - 8:37 pm

BKK

STL

31h 32m

2 stops

$871Delta

Mon, Jan 26 - Sun, Feb 8

6:35 am - 12:45 am

STL

BKK

29h 10m

2 stops

2:05 am - 11:37 pm

BKK

STL

34h 32m

2 stops

$882Delta

Mon, Jan 26 - Sun, Feb 1

10:07 am - 11:25 am

STL

BKK

36h 18m

3 stops

4:55 pm - 9:22 am

BKK

STL

29h 27m

3 stops

$902United Airlines

Mon, Jan 26 - Mon, Feb 2

1:15 pm - 4:20 pm

STL

BKK

38h 05m

2 stops

10:25 pm - 12:29 pm

BKK

STL

27h 04m

2 stops

$903ANA

Mon, Jan 26 - Wed, Feb 4

5:00 pm - 11:25 am

STL

BKK

29h 25m

2 stops

4:55 pm - 9:22 am

BKK

STL

29h 27m

3 stops

$910United Airlines

Mon, Jan 26 - Mon, Feb 2

8:00 am - 11:35 pm

STL

BKK

26h 35m

2 stops

10:05 pm - 10:14 pm

BKK

STL

36h 09m

2 stops

$923Japan Airlines

Tue, Mar 3 - Tue, Apr 28

6:18 pm - 5:35 pm

STL

HKT

34h 17m

2 stops

6:35 pm - 5:58 pm

HKT

STL

35h 23m

2 stops

$1,006Cathay Pacific

Mon, Mar 2 - Mon, Mar 16

8:00 am - 11:20 am

STL

HKT

38h 20m

2 stops

6:35 pm - 11:59 pm

HKT

STL

42h 24m

2 stops

$1,093Cathay Pacific

Thu, Feb 19 - Mon, Mar 2

4:05 pm - 1:40 pm

STL

HKT

33h 35m

2 stops

9:20 am - 5:21 pm

HKT

STL

44h 01m

2 stops

$1,195Qatar Airways

Wed, Apr 1 - Thu, Apr 30

11:05 am - 9:25 am

STL

CNX

33h 20m

3 stops

9:40 pm - 11:48 pm

CNX

STL

39h 08m

3 stops

$1,840Qatar Airways

Sun, Feb 8 - Sun, Feb 15

Japan Airlines flights from St. Louis to Thailand

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

Japan Airlines

Mar 3

STL8:00 amLambert-St Louis

26h 35m

2 stops

BKK11:35 pmBangkok Suvarnabhumi

Apr 28

BKK10:05 pmBangkok Suvarnabhumi

36h 09m

2 stops

STL10:14 pmLambert-St Louis

$923

Japan Airlines

Jan 26

STL7:04 amLambert-St Louis

44h 21m

2 stops

BKK4:25 pmBangkok Suvarnabhumi

Jan 29

BKK8:05 amBangkok Suvarnabhumi

41h 58m

2 stops

STL1:03 pmLambert-St Louis

$953

Japan Airlines

Jan 26

STL6:00 amLambert-St Louis

28h 35m

2 stops

BKK11:35 pmBangkok Suvarnabhumi

Jan 28

BKK1:10 amBangkok Suvarnabhumi

35h 49m

2 stops

STL11:59 pmLambert-St Louis

$997

Delta flights from St. Louis to Thailand

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

Delta

Jan 26

STL6:00 amLambert-St Louis

29h 45m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 8

BKK2:05 amBangkok Suvarnabhumi

31h 32m

2 stops

STL8:37 pmLambert-St Louis

$871

Delta

Jan 26

STL6:10 amLambert-St Louis

29h 35m

2 stops

BKK12:45 amBangkok Suvarnabhumi

Feb 1

BKK2:05 amBangkok Suvarnabhumi

34h 32m

2 stops

STL11:37 pmLambert-St Louis

$882

Delta

Feb 25

STL6:10 amLambert-St Louis

29h 45m

2 stops

BKK12:55 amBangkok Suvarnabhumi

Mar 7

BKK3:05 amBangkok Suvarnabhumi

32h 53m

2 stops

STL10:58 pmLambert-St Louis

$916

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

6:00 am-12:45 am

2 stops29h 45m

Bangkok Suvarnabhumi

Sun 2/8

2:05 am-8:37 pm

2 stops31h 32m

$871

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

6:35 am-12:45 am

2 stops29h 10m

Bangkok Suvarnabhumi

Sun 2/1

2:05 am-11:37 pm

2 stops34h 32m

$882

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

10:07 am-11:25 am

3 stops36h 18m

Bangkok Suvarnabhumi

Mon 2/2

4:55 pm-9:22 am

3 stops29h 27m

$902

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

1:15 pm-4:20 pm

2 stops38h 05m

Bangkok Suvarnabhumi

Wed 2/4

10:25 pm-12:29 pm

2 stops27h 04m

$903

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 1/26

5:00 pm-11:25 am

2 stops29h 25m

Bangkok Suvarnabhumi

Mon 2/2

4:55 pm-9:22 am

3 stops29h 27m

$910

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Tue 3/3

8:00 am-11:35 pm

2 stops26h 35m

Bangkok Suvarnabhumi

Tue 4/28

10:05 pm-10:14 pm

2 stops36h 09m

$923

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Mon 3/2

6:18 pm-5:35 pm

2 stops34h 17m

Phuket City

Mon 3/16

6:35 pm-5:58 pm

2 stops35h 23m

$1,006

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Thu 2/19

8:00 am-11:20 am

2 stops38h 20m

Phuket City

Mon 3/2

6:35 pm-11:59 pm

2 stops42h 24m

$1,093

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Wed 4/1

4:05 pm-1:40 pm

2 stops33h 35m

Phuket City

Thu 4/30

9:20 am-5:21 pm

2 stops44h 01m

$1,195

St. LouisChiang Mai

STL - CNX

STLCNX

Lambert-St Louis

Sun 2/8

11:05 am-9:25 am

3 stops33h 20m

Chiang Mai

Sun 2/15

9:40 pm-11:48 pm

3 stops39h 08m

$1,840

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 January is, on average, the cheapest month to fly to Thailand from St. Louis, with most prices found around $1,059. If you are unable to visit Thailand during the month of January, then departing from St. Louis during the month September is also very affordable. Most momondo users find prices during this month for around $1,097.

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 $1,298 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

Fastest flight time	28h 05m
Direct flights	None

The fastest flight from St. Louis to Thailand takes 28h 05m

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 10 as of January 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
Korean Air	PriceFrom $793	Free Cancellation	Rating 8.4 1,187 reviews	Search Korean Air flights
Cathay Pacific	PriceFrom $927	Free Cancellation	Rating 7.6 1,130 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $966	Free Cancellation	Rating 8.3 1,680 reviews	Search Japan Airlines flights
American Airlines	PriceFrom $979	Free Cancellation	Rating 7.2 11,117 reviews	Search American Airlines flights
United Airlines	PriceFrom $984	Free Cancellation	Rating 7.4 9,152 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,069 reviews	Search ANA flights
Delta	PriceFrom $1,040	Free Cancellation	Rating 7.9 8,039 reviews	Search Delta flights
Qatar Airways	PriceFrom $1,094	Free Cancellation	Rating 7.4 3,714 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $1,280	Free Cancellation	Rating 7.1 10,619 reviews	Search Air Canada flights
Finnair	PriceFrom $1,356	Free Cancellation	Rating 7.6 1,348 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.