Cheap Flights from St Louis to Bangkok

Compare St Louis to Bangkok flight deals

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Flight deals from St Louis to Bangkok

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Bangkok? If you want to travel next month, return fares start from $2,328. Find the lowest prices on one-way and return tickets right here.

Bangkok.$2,158 per passenger.Departing Thu, 3 Sep, returning Mon, 14 Sep.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 3 Sep, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Mon, 14 Sep, arriving in St Louis.Price includes taxes and charges.From $2,158, select.

Bangkok.$2,167 per passenger.Departing Fri, 21 Aug, returning Thu, 3 Sep.Return flight with Southwest Airlines and China Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Fri, 21 Aug, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Thu, 3 Sep, arriving in St Louis.Price includes taxes and charges.From $2,167, select.

Bangkok.$2,174 per passenger.Departing Mon, 19 Oct, returning Tue, 3 Nov.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Mon, 19 Oct, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Tue, 3 Nov, arriving in St Louis.Price includes taxes and charges.From $2,174, select.

Bangkok.$2,176 per passenger.Departing Mon, 8 Mar, returning Mon, 15 Mar.Return flight with Alaska Airlines and Qatar Airways.Outbound indirect flight with Alaska Airlines, departs from St Louis on Mon, 8 Mar, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Mon, 15 Mar, arriving in St Louis.Price includes taxes and charges.From $2,176, select.

Bangkok.$2,189 per passenger.Departing Thu, 22 Apr, returning Thu, 29 Apr.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 22 Apr, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Thu, 29 Apr, arriving in St Louis.Price includes taxes and charges.From $2,189, select.

Bangkok.$2,189 per passenger.Departing Mon, 1 Feb, returning Mon, 15 Feb.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Mon, 1 Feb, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Mon, 15 Feb, arriving in St Louis.Price includes taxes and charges.From $2,189, select.

Bangkok.$2,189 per passenger.Departing Tue, 4 May, returning Tue, 11 May.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Tue, 4 May, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Tue, 11 May, arriving in St Louis.Price includes taxes and charges.From $2,189, select.

Bangkok.$2,189 per passenger.Departing Tue, 8 Sep, returning Fri, 2 Oct.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Tue, 8 Sep, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Fri, 2 Oct, arriving in St Louis.Price includes taxes and charges.From $2,189, select.

Bangkok.$2,196 per passenger.Departing Thu, 18 Feb, returning Mon, 29 Mar.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 18 Feb, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Mon, 29 Mar, arriving in St Louis.Price includes taxes and charges.From $2,196, select.

Bangkok.$2,210 per passenger.Departing Thu, 1 Oct, returning Thu, 22 Oct.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 1 Oct, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Thu, 22 Oct, arriving in St Louis.Price includes taxes and charges.From $2,210, select.

Bangkok.$2,210 per passenger.Departing Thu, 12 Nov, returning Mon, 23 Nov.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 12 Nov, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Mon, 23 Nov, arriving in St Louis.Price includes taxes and charges.From $2,210, select.

Bangkok.$2,258 per passenger.Departing Thu, 21 Jan, returning Sat, 1 May.Return flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Thu, 21 Jan, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Qatar Airways, departs from Bangkok Suvarnabhumi on Sat, 1 May, arriving in St Louis.Price includes taxes and charges.From $2,258, select.

Bangkok.$2,308 per passenger.Departing Wed, 18 Nov, returning Wed, 2 Dec.Return flight with Southwest Airlines and China Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Wed, 18 Nov, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Wed, 2 Dec, arriving in St Louis.Price includes taxes and charges.From $2,308, select.

Bangkok.$2,328 per passenger.Departing Tue, 11 Aug, returning Sat, 29 Aug.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from St Louis on Tue, 11 Aug, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Sat, 29 Aug, arriving in St Louis.Price includes taxes and charges.From $2,328, select.

Bangkok.$2,383 per passenger.Departing Sun, 10 Jan, returning Sun, 17 Jan.Return flight with Southwest Airlines and China Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Sun, 10 Jan, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Sun, 17 Jan, arriving in St Louis.Price includes taxes and charges.From $2,383, select.

Bangkok.$2,400 per passenger.Departing Mon, 11 Jan, returning Mon, 1 Feb.Return flight with Alaska Airlines and China Airlines.Outbound indirect flight with Alaska Airlines, departs from St Louis on Mon, 11 Jan, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with China Airlines, departs from Bangkok Suvarnabhumi on Mon, 1 Feb, arriving in St Louis.Price includes taxes and charges.From $2,400, select.

Find the cheapest month to fly from St Louis to Bangkok

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Bangkok flights are currently cheapest in September.

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Alternative St Louis to Bangkok routes

Looking for the cheapest, fastest or easiest route from St Louis to Bangkok? You could fly into the following airports instead.

Don Mueang

21km from central Bangkok

Closest

from $3,090

Search flights

Bangkok Suvarnabhumi

29km from central Bangkok

Cheapest

from $2,158

Search flights

St Louis to Bangkok: Flight information

The things to know before you go.

Cheapest flight found	$2,158
Cheapest month to fly	September

Finding cheap flights from St Louis to Bangkok: Frequently asked questions

How many airports are there in Bangkok?

There are 2 airports in Bangkok: Don Mueang and Bangkok Suvarnabhumi.

How much are return flights from St Louis to Bangkok?

The best price we found for a return flight from St Louis to Bangkok is $2,158. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from St Louis to Bangkok?

Currently, there are no airlines that fly direct from St Louis to Bangkok. But we found flights with one or more stops from $2,158.

How many flights are there a week from St Louis to Bangkok?

As of July 2026, there are no flights flying from St Louis to Bangkok.

When is the cheapest time to fly from St Louis to Bangkok?

The cheapest month to fly from St Louis to Bangkok is usually September.

Which is the cheapest airport to fly into in Bangkok?

If you're flying from St Louis Airport, the cheapest airport near Bangkok is Bangkok Suvarnabhumi – which is 28.6 km away from the centre of Bangkok. We've found flights into this airport from $2,158.

Which upcoming date is cheapest to fly from St Louis Airport to Bangkok on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Bangkok on Thursday, 3 September 2026.

Can I get a direct flight from St Louis Airport to Bangkok?

No airlines currently offer direct flights between St Louis Airport and Bangkok. Most routes have one or more stops.

How can I get the best flight deal from St Louis Airport to Bangkok?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Bangkok but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Bangkok?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Bangkok is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Bangkok?

In July, the average temperature is usually around 28°C. April is typically the warmest month in Bangkok, when it usually averages around 35°C. You can expect the least rain in December. The coldest month is November, with temperatures averaging 22°C. The rainiest month is September.

Which is the cheapest airline to fly from St Louis Airport to Bangkok with?

Currently, Qatar Airways offers the cheapest flight tickets to Bangkok.

Travelling from St Louis Lambert International Airport (STL) to Bangkok: what you need to know

St Louis Lambert International Airport is located in St Louis. Based in the UTC+7 timezone, Bangkok is 13 hours ahead of St Louis.
Leave plenty of time to make your STL to Bangkok flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.
Flying during a peak month such as July? School holidays and other popular periods can mean longer lines and delays at check-in and security. Play things extra safe and arrive up to four hours before an international flight and two hours before a domestic departure.
The journey from central St Louis to STL takes around 30 minutes by public transport. If you drive, ride-share or grab a taxi, you'll cover the 16 kilometres in 25 minutes or so, depending on traffic conditions.
Have an early flight from St Louis Lambert International Airport to Bangkok? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these stays close to STL:
76% of flights that leave from St Louis Lambert International Airport reach their destination on schedule.
STL's address is 10701 Lambert International Blvd..

How to find the cheapest flights from St Louis Lambert International Airport (STL) to Bangkok

$1,109 is the lowest price we've found for a one-way St Louis Lambert International Airport to Bangkok flight. A round-trip ticket right now is $2,158. Depending on how early you book and the availability, these fares could change.
To pick up cheap flights from STL to Bangkok, book as early as possible. Airlines typically offer lower fares when flights first go on sale.
If you have flexibility with your travel dates, check out the 'Whole month' tool. It'll find the lowest price across every month when looking for a St Louis Lambert International Airport to Bangkok ticket.
Cut down on the time spent looking for cheap flights from STL to Bangkok by setting up a Price Alert. We'll send you an email or push notification on the app when a lower fare becomes available.
Find an affordable flight from St Louis Lambert International Airport to Bangkok with the help of our filters. Choose your preferred times, number of stops and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Bangkok

Bangkok Suvarnabhumi International Airport (BKK)

Bangkok Suvarnabhumi International Airport (BKK) to central Bangkok takes about 35 minutes by car. The centre is roughly 31 kilometres away.
If you're travelling by public transport, expect a journey time of about 35 minutes.
If you have a late flight from St Louis Lambert International Airport to Bangkok, few things beat the convenience of staying close to the terminal. Collect your bags from the carousel and then be showered and sleeping soon after at one of these accommodation options near BKK:
Reserving your vehicle from Bangkok Suvarnabhumi International Airport about four weeks ahead of your flight from STL to Bangkok can help you get the lowest rate.

Bangkok Don Mueang International Airport (DMK)

Central Bangkok is located around 24 kilometres from Bangkok Don Mueang International Airport (DMK). After your flight from St Louis Lambert International Airport to Bangkok has touched down and you've made your way to arrivals, expect a drive of about 35 minutes.
If you choose to travel on public transport, the ride to the centre will take you 1 hour 5 minutes or so.
After stepping off your STL to Bangkok flight, unwind at a hotel close to DMK. These are some comfortable options that'll help you get into relaxation mode:
Get the lowest price by securing your ride from DMK three weeks ahead of time. You'll also have access to a wider selection of vehicles.

Best time to go to Bangkok

February is the busiest month for flights from St Louis Lambert International Airport to Bangkok. To steer clear of the crowds, head to Bangkok in May.
When booking your St Louis Lambert International Airport to Bangkok plane ticket, think about the kind of weather you prefer. April is the warmest month in Bangkok, with temperatures ranging from 26ºC to 37ºC.
January has average temperatures of between 19ºC and 34ºC. Look for a cheap ticket from STL to Bangkok around that time if you want to travel in cooler conditions.

More about Bangkok

Start your Bangkok trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from St Louis Lambert International Airport to Bangkok, explore our selection of hotels including:
There are so many things to do and see in this city it can be hard to figure out where to begin. Wat Phra Kaew, Grand Palace and Songkran Festival Silom are major attractions which should feature on any good Bangkok itinerary.

Explore more of Thailand

You've seen Bangkok, now it's time to explore other corners of Thailand. Travel around 467 kilometres northeast to Udon Thani to tick off its top attractions. From Thai-Chinese Cultural Centre to Wat Pho Chai and Wat Burapa Wanaram, you've got a jam-packed schedule ahead.
If you're eager to discover another well-known destination in Thailand, consider Nakhon Ratchasima, roughly 225 kilometres northeast of Bangkok. Night Safari Korat, Wat Chai Mongkol and Wat Na Pha That are the start of reasons to visit.