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 41% of people opting to fly with this airline when traveling to Thailand. Keep in mind that there are 7 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?

United Airlines 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 7 as of April 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.

$642 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.

9:39 am - 6:15 am

STL

BKK

32h 36m

2 stops

3:15 am - 7:20 pm

BKK

STL

28h 05m

2 stops

$967Multiple Airlines

Mon, Jun 29 - Mon, Jul 13

7:38 am - 11:50 pm

STL

BKK

28h 12m

2 stops

3:05 pm - 11:31 pm

BKK

STL

44h 26m

2 stops

$969Etihad Airways

Mon, Oct 5 - Sat, Oct 10

7:44 am - 11:50 pm

STL

BKK

28h 06m

2 stops

3:05 pm - 10:24 pm

BKK

STL

43h 19m

2 stops

$999Etihad Airways

Thu, Sep 10 - Thu, Sep 17

4:29 pm - 6:15 am

STL

BKK

25h 46m

2 stops

8:50 pm - 11:09 pm

BKK

STL

38h 19m

2 stops

$1,006Etihad Airways

Sun, Sep 27 - Sun, Oct 25

6:06 am - 11:50 pm

STL

BKK

29h 44m

2 stops

8:50 pm - 1:17 pm

BKK

STL

29h 27m

2 stops

$1,009Multiple Airlines

Thu, Aug 20 - Wed, Nov 18

9:38 am - 11:50 pm

STL

BKK

26h 12m

2 stops

3:05 pm - 7:02 pm

BKK

STL

39h 57m

2 stops

$1,039Multiple Airlines

Sun, Oct 11 - Sat, Oct 24

6:06 am - 12:55 pm

STL

BKK

42h 49m

2 stops

9:05 pm - 8:03 pm

BKK

STL

34h 58m

2 stops

$1,101Qatar Airways

Wed, Sep 16 - Fri, Sep 25

2:45 pm - 7:45 am

STL

HKT

29h 00m

2 stops

8:30 pm - 8:03 pm

HKT

STL

35h 33m

2 stops

$1,225Qatar Airways

Sat, Sep 12 - Sat, Sep 19

2:45 pm - 6:50 pm

STL

HKT

40h 05m

2 stops

8:30 pm - 8:03 pm

HKT

STL

35h 33m

2 stops

$1,277Qatar Airways

Sat, Sep 19 - Sun, Sep 27

6:00 am - 7:45 am

STL

HKT

37h 45m

2 stops

8:30 pm - 11:20 pm

HKT

STL

38h 50m

2 stops

$1,377Qatar Airways

Thu, Sep 10 - Mon, Sep 14

Etihad Airways flights from St. Louis to Thailand

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

Etihad Airways

Jun 22

STL6:00 amLambert-St Louis

36h 45m

2 stops

BKK6:45 amBangkok Suvarnabhumi

Jul 6

BKK3:15 amBangkok Suvarnabhumi

28h 05m

2 stops

STL7:20 pmLambert-St Louis

$1,257

Etihad Airways

Jun 15

STL7:00 amLambert-St Louis

28h 50m

2 stops

BKK11:50 pmBangkok Suvarnabhumi

Jun 21

BKK3:15 amBangkok Suvarnabhumi

28h 06m

2 stops

STL7:21 pmLambert-St Louis

$1,278

Etihad Airways

Jun 12

STL7:51 pmLambert-St Louis

52h 14m

2 stops

HKT12:05 pmPhuket City

Jun 18

HKT9:25 amPhuket City

45h 35m

2 stops

STL7:00 pmLambert-St Louis

$1,407

Finnair flights from St. Louis to Thailand

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

Finnair

Jun 9

STL5:00 pmLambert-St Louis

48h 30m

2 stops

BKK5:30 amBangkok Suvarnabhumi

Jun 24

BKK7:05 amBangkok Suvarnabhumi

47h 28m

2 stops

STL6:33 pmLambert-St Louis

$1,422

Finnair

Jun 20

STL5:14 pmLambert-St Louis

48h 16m

2 stops

BKK5:30 amBangkok Suvarnabhumi

Jul 5

BKK7:05 amBangkok Suvarnabhumi

28h 51m

2 stops

STL11:56 pmLambert-St Louis

$1,444

Finnair

Jun 8

STL5:00 pmLambert-St Louis

48h 30m

2 stops

BKK5:30 amBangkok Suvarnabhumi

Jun 23

BKK7:05 amBangkok Suvarnabhumi

48h 31m

2 stops

STL7:36 pmLambert-St Louis

$1,462

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 6/29

9:39 am-6:15 am

2 stops32h 36m

Bangkok Suvarnabhumi

Mon 7/13

3:15 am-7:20 pm

2 stops28h 05m

$967

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 10/5

7:38 am-11:50 pm

2 stops28h 12m

Bangkok Suvarnabhumi

Sat 10/10

3:05 pm-11:31 pm

2 stops44h 26m

$969

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 9/10

7:44 am-11:50 pm

2 stops28h 06m

Bangkok Suvarnabhumi

Thu 9/17

3:05 pm-10:24 pm

2 stops43h 19m

$999

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 9/27

4:29 pm-6:15 am

2 stops25h 46m

Bangkok Suvarnabhumi

Sun 10/25

8:50 pm-11:09 pm

2 stops38h 19m

$1,006

Quickest round-trip

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/20

6:06 am-11:50 pm

2 stops29h 44m

Bangkok Suvarnabhumi

Wed 11/18

8:50 pm-1:17 pm

2 stops29h 27m

$1,009

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Sun 10/11

9:38 am-11:50 pm

2 stops26h 12m

Bangkok Suvarnabhumi

Sat 10/24

3:05 pm-7:02 pm

2 stops39h 57m

$1,039

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/16

6:06 am-12:55 pm

2 stops42h 49m

Bangkok Suvarnabhumi

Fri 9/25

9:05 pm-8:03 pm

2 stops34h 58m

$1,101

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 9/12

2:45 pm-7:45 am

2 stops29h 00m

Phuket City

Sat 9/19

8:30 pm-8:03 pm

2 stops35h 33m

$1,225

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Sat 9/19

2:45 pm-6:50 pm

2 stops40h 05m

Phuket City

Sun 9/27

8:30 pm-8:03 pm

2 stops35h 33m

$1,277

St. LouisPhuket City

STL - HKT

STLHKT

Lambert-St Louis

Thu 9/10

6:00 am-7:45 am

2 stops37h 45m

Phuket City

Mon 9/14

8:30 pm-11:20 pm

2 stops38h 50m

$1,377

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 February is, on average, the cheapest month to fly to Thailand from St. Louis, with most prices found around $1,017. If you are unable to visit Thailand during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $1,067.

How far in advance should I book a flight from St. Louis 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 $1,261 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 $1,036 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	26h 16m
Direct flights	None

The fastest flight from St. Louis to Thailand takes 26h 16m

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

Search flight deals

Frequently asked questions about flying from 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 7 as of April 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 8,458 reviews	Search Delta flights
Cathay Pacific	PriceFrom $927	Free Cancellation	Rating 7.6 1,301 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $929	Free Cancellation	Rating 8.3 1,788 reviews	Search Japan Airlines flights
American Airlines	PriceFrom $954	Free Cancellation	Rating 7.1 11,673 reviews	Search American Airlines flights
United Airlines	PriceFrom $983	Free Cancellation	Rating 7.4 9,657 reviews	Search United Airlines flights
ANA	PriceFrom $1,007	Free Cancellation	Rating 8.4 1,192 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 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.