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Cheap Flights from St Louis to Bangkok

Compare St Louis to Bangkok flight deals

Find the cheapest month or even day of the year to fly to Bangkok

Book the best Bangkok fare with no extra fees

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 Rs331,330. Find the lowest prices on one-way and return tickets right here.
Bangkok.Rs153,270 per passenger.Departing Sun, 2 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Sun, 2 Aug, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs153,270, select.
Bangkok.Rs158,022 per passenger.Departing Wed, 6 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 6 May, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs158,022, select.
Bangkok.Rs162,533 per passenger.Departing Mon, 1 Mar.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from St Louis on Mon, 1 Mar, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs162,533, select.
Bangkok.Rs168,568 per passenger.Departing Mon, 21 Sep.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from St Louis on Mon, 21 Sep, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs168,568, select.
Bangkok.Rs171,401 per passenger.Departing Fri, 24 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri, 24 Apr, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs171,401, select.
Bangkok.Rs172,130 per passenger.Departing Tue, 28 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 28 Jul, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs172,130, select.
Bangkok.Rs180,707 per passenger.Departing Wed, 11 Nov.One-way flight with Qatar Airways.Outbound indirect flight with Qatar Airways, departs from St Louis on Wed, 11 Nov, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs180,707, select.
Bangkok.Rs205,684 per passenger.Departing Fri, 23 Oct.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from St Louis on Fri, 23 Oct, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs205,684, select.
Bangkok.Rs258,734 per passenger.Departing Fri, 15 Jan.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Fri, 15 Jan, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs258,734, select.
Bangkok.Rs361,921 per passenger.Departing Tue, 15 Dec.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Tue, 15 Dec, arriving in Bangkok Suvarnabhumi.Price includes taxes and charges.From Rs361,921, 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 August.
Apr
from Rs171,401
May
from Rs158,022
Jun
Find prices
Jul
from Rs172,130
Aug
from Rs153,270
Sep
from Rs168,568
Oct
from Rs205,684
Nov
from Rs180,707
Dec
from Rs361,921
Jan
from Rs258,734
Feb
Find prices
Mar
from Rs162,533

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 Rs185,712
Search flights

Bangkok Suvarnabhumi

29km from central Bangkok
Cheapest
from Rs153,270
Search flights

St Louis to Bangkok: Flight information

The things to know before you go.
Cheapest flight foundRs153,270
Cheapest month to flyAugust

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

There are 2 airports in Bangkok: Don Mueang and Bangkok Suvarnabhumi.
The best price we found for a return flight from St Louis to Bangkok is Rs304,181. 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.
Currently, there are no airlines that fly direct from St Louis to Bangkok. But we found flights with one or more stops from Rs304,181.
As of April 2026, there are no flights flying from St Louis to Bangkok.
The cheapest month to fly from St Louis to Bangkok is usually September.
If you're flying from St Louis Airport, the cheapest airport near Bangkok is Bangkok Suvarnabhumi – which is 28.5 km away from the centre of Bangkok. We've found flights into this airport from Rs304,181.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Bangkok on Monday, 7 September 2026.
No airlines currently offer direct flights between St Louis Airport and Bangkok. Most routes have one or more stops.
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.
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.
In April, the average temperature is usually around 31°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.
Currently, Alaska Airlines offers the cheapest flight tickets to Bangkok.

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

  • Bangkok is 12 hours ahead of St Louis, where Lambert-St. Louis International Airport is located. Bangkok follows the UTC+7 timezone.

  • Leave plenty of time to get on your STL to Bangkok flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Heading away during a peak period like public or school holidays? Expect longer queues at check-in and security. Play it safe and arrive up to four hours before international flights and two hours ahead of domestic departures.

  • Travelling from central St Louis to STL takes around 35 minutes on public transport. If you ride-share, drive or grab a cab, you'll cover the 16 kilometres in 20 minutes or so, depending on traffic.

  • Booked an early flight from Lambert-St. Louis International Airport to Bangkok? Avoid the stress of rushing to the airport (and catch some extra z's) by choosing one of these stays close to STL:

  • Of the departures from Lambert-St. Louis International Airport, 78.04% land on schedule at their destination.

  • STL is located at 10701 Lambert International Blvd..

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

  • Rs153,270 is currently the lowest price for a one-way Lambert-St. Louis International Airport to Bangkok flight. Return flight tickets start at Rs304,181. These prices may change based on availability.

  • To find cheap flights from STL to Bangkok, book early. Airlines usually offer lower prices when tickets first go on sale.

  • The 'Whole month' search tool will show you the cheapest tickets from Lambert-St. Louis International Airport to Bangkok throughout the entire month. It's a great way to snap up a bargain if your travel plans are flexible.

  • Save time searching for cheap flights from STL to Bangkok by setting up a Price Alert. You'll receive an email or notification through the app when a new discounted fare appears.

  • Find a cheap flight from Lambert-St. Louis International Airport to Bangkok with the help of our filters. Choose your preferred departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Bangkok

Suvarnabhumi Airport (BKK)

  • The distance from Suvarnabhumi Airport (BKK) to central Bangkok is roughly 32 kilometres. It takes about 35 minutes to get to the centre driving.

  • If you're using public transport, expect a journey time of about 1 hour 5 minutes.

  • The last thing you want is a lengthy journey to your hotel if you're landing late on a flight from Lambert-St. Louis International Airport to Bangkok. Reserve one of these accommodation options near BKK instead:

  • Go where the road takes you with a Suvarnabhumi Airport rental car. Pick up your wheels from Chic Car Rent, asap car hire or Hertz and experience more of Bangkok and beyond.

  • To get the lowest price, book your ride from Suvarnabhumi Airport around four weeks ahead of your flight from STL to Bangkok.

Don Mueang International Airport (DMK)

  • Don Mueang International Airport (DMK) is around 27 kilometres from the centre of Bangkok. Following your flight from Lambert-St. Louis International Airport to Bangkok, it'll take you around 30 minutes to reach the heart of the city in a cab or ride-share.

  • If you're catching public transport, it'll take around 1 hour 5 minutes.

  • Place the 'Do not disturb' sign on your door and relax at a hotel near DMK. Here are a few options where you can settle in after your STL to Bangkok flight:

  • No time to waste? The fastest way to get to where you're going is with a Don Mueang International Airport rental car. Pick up your wheels from Chic Car Rent, asap car hire or Hertz and be on your way in a flash.

  • Avoid paying more than you need to. Securing your ride three weeks before your arrival at DMK will help you save.

Best time to go to Bangkok

  • Carefully consider your travel dates before booking your flight from Lambert-St. Louis International Airport to Bangkok. The city comes alive in peak season, but hotel rates are typically higher and attractions can be busy. Visit Bangkok in the off-season if you prefer a more relaxed vibe.

  • When booking your Lambert-St. Louis International Airport to Bangkok flight ticket, think about the weather you're most comfortable in. April is the warmest month in Bangkok, with temperatures ranging from 26ºC to 37ºC.

  • If you like travelling in cooler conditions, search for a cheap ticket from STL to Bangkok in December when temperatures average between 19ºC and 33ºC.

More about Bangkok

  • Start your Bangkok trip right by choosing the ideal place to stay. Once you've booked your flight from Lambert-St. Louis International Airport to Bangkok, explore our selection of accommodation options including:

  • There are so many things to discover in this city it can be tricky to know where to start. Wat Arun, Grand Palace and Wat Phra Kaew are top attractions which should feature on every Bangkok itinerary.

Explore more of Thailand

  • You've seen Bangkok, now it's time to discover other corners of Thailand. Journey about 467 kilometres north-east to Udon Thani to tick off its must-visit sights. From Nong Prajak Public Park to Krom Luang Prachaksinlapakhom Monument and Chinesisches Tor, you've got a jam-packed schedule ahead.

  • Nakhon Ratchasima is another standout destination in Thailand and is around 225 kilometres north-east of Bangkok. No journey is complete without dropping by Art and Culture Centre, Vongchavalitkul University, Wat Pa Salwan (Burapha Chan Chedi) and บ้านสวนเกษตรอินทรีย์ (บ้านสวนในซอย).

Plan the rest of your trip from St Louis to Bangkok

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.