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 43% 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.

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

Cathay Pacific, United Airlines, and EVA Air are the most popular carriers 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 9 as of February 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.

$411 Cheap Flights from St. Louis to Thailand in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

7:56 pm - 12:00 pm

STL

BKK

28h 04m

2 stops

1:10 pm - 2:26 pm

BKK

STL

37h 16m

2 stops

$879Multiple Airlines

Mon, Aug 17 - Thu, Sep 10

7:00 am - 12:10 am

STL

BKK

29h 10m

2 stops

7:35 am - 11:59 pm

BKK

STL

28h 24m

2 stops

$917Multiple Airlines

Wed, Apr 8 - Tue, Apr 21

7:00 am - 12:10 am

STL

BKK

29h 10m

2 stops

7:35 am - 11:59 pm

BKK

STL

28h 24m

2 stops

$920Multiple Airlines

Wed, Apr 8 - Tue, Apr 21

7:00 am - 4:30 pm

STL

BKK

45h 30m

2 stops

5:50 pm - 3:16 pm

BKK

STL

57h 26m

2 stops

$969STARLUX Airlines

Sun, Mar 22 - Sun, May 31

5:55 pm - 11:25 am

STL

BKK

29h 30m

3 stops

9:35 am - 9:08 pm

BKK

STL

47h 33m

2 stops

$975United Airlines

Sun, Mar 8 - Sun, May 17

3:50 pm - 12:00 pm

STL

BKK

32h 10m

2 stops

1:10 pm - 3:50 pm

BKK

STL

38h 40m

2 stops

$984STARLUX Airlines

Wed, Apr 1 - Thu, Apr 30

6:00 am - 9:35 am

STL

BKK

63h 35m

3 stops

3:45 pm - 9:25 am

BKK

STL

29h 40m

3 stops

$1,005United Airlines

Wed, Apr 8 - Tue, Apr 21

6:33 pm - 10:50 am

STL

HKT

52h 17m

2 stops

11:50 am - 7:33 pm

HKT

STL

43h 43m

2 stops

$1,323Cathay Pacific

Wed, Apr 1 - Thu, Apr 30

12:05 pm - 5:20 pm

STL

HKT

41h 15m

2 stops

11:50 am - 7:33 pm

HKT

STL

43h 43m

2 stops

$1,359Cathay Pacific

Mon, Apr 6 - Mon, Apr 13

6:59 pm - 10:10 pm

STL

HKT

39h 11m

2 stops

11:25 pm - 7:11 pm

HKT

STL

31h 46m

2 stops

$1,366Delta

Fri, Apr 10 - Fri, Apr 17

United Airlines flights from St. Louis to Thailand

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

United Airlines

Mar 1

STL6:00 pmLambert-St Louis

52h 25m

3 stops

BKK11:25 amBangkok Suvarnabhumi

Mar 31

BKK3:45 pmBangkok Suvarnabhumi

28h 38m

3 stops

STL8:23 amLambert-St Louis

$966

United Airlines

Mar 8

STL5:55 pmLambert-St Louis

29h 30m

3 stops

BKK11:25 amBangkok Suvarnabhumi

May 17

BKK9:35 amBangkok Suvarnabhumi

47h 33m

2 stops

STL9:08 pmLambert-St Louis

$975

United Airlines

Apr 8

STL6:00 amLambert-St Louis

63h 35m

3 stops

BKK9:35 amBangkok Suvarnabhumi

Apr 21

BKK3:45 pmBangkok Suvarnabhumi

29h 40m

3 stops

STL9:25 amLambert-St Louis

$1,005

Qatar Airways flights from St. Louis to Thailand

Our best Qatar Airways deals on St. Louis to Thailand flight tickets

Qatar Airways

Mar 22

STL2:19 pmLambert-St Louis

34h 46m

2 stops

BKK1:05 pmBangkok Suvarnabhumi

May 21

BKK2:05 amBangkok Suvarnabhumi

33h 49m

2 stops

STL11:54 pmLambert-St Louis

$1,038

Qatar Airways

Mar 23

STL2:19 pmLambert-St Louis

34h 46m

2 stops

BKK1:05 pmBangkok Suvarnabhumi

Apr 22

BKK1:45 amBangkok Suvarnabhumi

53h 45m

2 stops

STL7:30 pmLambert-St Louis

$1,096

Qatar Airways

Mar 7

STL10:43 amLambert-St Louis

37h 22m

2 stops

BKK1:05 pmBangkok Suvarnabhumi

May 29

BKK1:45 amBangkok Suvarnabhumi

30h 45m

2 stops

STL8:30 pmLambert-St Louis

$1,113

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 8/17

7:56 pm-12:00 pm

2 stops28h 04m

Bangkok Suvarnabhumi

Thu 9/10

1:10 pm-2:26 pm

2 stops37h 16m

$879

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/8

7:00 am-12:10 am

2 stops29h 10m

Bangkok Suvarnabhumi

Tue 4/21

7:35 am-11:59 pm

2 stops28h 24m

$917

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/8

7:00 am-12:10 am

2 stops29h 10m

Bangkok Suvarnabhumi

Tue 4/21

7:35 am-11:59 pm

2 stops28h 24m

$920

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/22

7:00 am-4:30 pm

2 stops45h 30m

Bangkok Suvarnabhumi

Sun 5/31

5:50 pm-3:16 pm

2 stops57h 26m

$969

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 3/8

5:55 pm-11:25 am

3 stops29h 30m

Bangkok Suvarnabhumi

Sun 5/17

9:35 am-9:08 pm

2 stops47h 33m

$975

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/1

3:50 pm-12:00 pm

2 stops32h 10m

Bangkok Suvarnabhumi

Thu 4/30

1:10 pm-3:50 pm

2 stops38h 40m

$984

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 4/8

6:00 am-9:35 am

3 stops63h 35m

Bangkok Suvarnabhumi

Tue 4/21

3:45 pm-9:25 am

3 stops29h 40m

$1,005

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Wed 4/1

6:33 pm-10:50 am

2 stops52h 17m

Phuket City

Thu 4/30

11:50 am-7:33 pm

2 stops43h 43m

$1,323

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Mon 4/6

12:05 pm-5:20 pm

2 stops41h 15m

Phuket City

Mon 4/13

11:50 am-7:33 pm

2 stops43h 43m

$1,359

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Fri 4/10

6:59 pm-10:10 pm

2 stops39h 11m

Phuket City

Fri 4/17

11:25 pm-7:11 pm

2 stops31h 46m

$1,366

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 $1,067. If you are unable to visit Thailand during the month of January, then departing from St. Louis during the month February is also very affordable. Most momondo users find prices during this month for around $1,106.

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 $1,285 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 $987 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	24h 38m
Direct flights	None

The fastest flight from St. Louis to Thailand takes 24h 38m

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 February 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
Delta	PriceFrom $881	Free Cancellation	Rating 7.9 8,238 reviews	Search Delta flights
Cathay Pacific	PriceFrom $927	Free Cancellation	Rating 7.6 1,179 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,714 reviews	Search Japan Airlines flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.1 11,345 reviews	Search American Airlines flights
United Airlines	PriceFrom $983	Free Cancellation	Rating 7.4 9,345 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,100 reviews	Search ANA flights
Qatar Airways	PriceFrom $1,017	Free Cancellation	Rating 7.4 3,742 reviews	Search Qatar Airways flights
Air Canada	PriceFrom $1,280	Free Cancellation	Rating 7.1 10,746 reviews	Search Air Canada flights
Finnair	PriceFrom $1,289	Free Cancellation	Rating 7.6 1,369 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.