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Southeast Asia

$355+ Cheap flights from St. Louis (STL) to Southeast Asia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from St. Louis to Southeast Asia

Cheapest flights from St. Louis to Southeast Asia
Explore the most affordable flight options available from St. Louis to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:30 pmSTL - SGN
2 stops40h 25mUnited Airlines
Wed 12/107:30 amSGN - STL
2 stops21h 58mUnited Airlines
Deal found 11/11$931
This Delta deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:00 amSTL - KUL
2 stops26h 25mDelta
Tue 11/2511:55 pmKUL - STL
2 stops36h 03mDelta
Deal found 11/11$947
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:34 amSTL - BKK
2 stops29h 21mDelta
Mon 2/29:40 amBKK - STL
2 stops26h 59mDelta
Deal found 11/12$960
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/307:02 pmSTL - BKK
2 stops40h 53mDelta
Wed 2/49:40 amBKK - STL
2 stops26h 45mDelta
Deal found 11/12$966
This Ovago deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/306:30 amSTL - KUL
2 stops34h 15mANA
Wed 12/248:05 amKUL - STL
2 stops44h 21mANA
Deal found 11/11$980
This oojo deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/234:15 pmSTL - BKK
2 stops31h 20mMultiple Airlines
Wed 12/105:40 pmBKK - STL
2 stops43h 19mMultiple Airlines
Deal found 11/11$982
This Cathay Pacific deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:00 amSTL - BKK
2 stops28h 15mMultiple Airlines
Tue 11/184:55 pmBKK - STL
2 stops40h 28mMultiple Airlines
Deal found 11/10$986
This Cathay Pacific deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:00 amSTL - HKT
2 stops40h 20mMultiple Airlines
Wed 12/36:35 pmHKT - STL
2 stops37h 30mMultiple Airlines
Deal found 11/11$986
This oojo deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:00 amSTL - BKK
2 stops44h 30mMultiple Airlines
Wed 11/195:40 pmBKK - STL
2 stops43h 19mMultiple Airlines
Deal found 11/10$991
This Trip.com deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:00 amSTL - MNL
2 stops38h 45mMultiple Airlines
Mon 12/13:40 amMNL - STL
2 stops48h 47mMultiple Airlines
Deal found 11/12$993
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/296:40 amSTL - BKK
2 stops29h 05mDelta
Tue 2/39:40 amBKK - STL
2 stops26h 59mDelta
Deal found 11/12$1,000
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:36 pmSTL - BKK
2 stops45h 09mDelta
Sun 2/19:40 amBKK - STL
2 stops43h 59mDelta
Deal found 11/12$1,006

Cheap flight deals from St. Louis to Southeast Asia

Keep the following information in mind while searching for St. Louis to Southeast Asia flight deals. Data was last updated November 13, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$877
(oojo)

One-way from

$355
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,184
Provider with most accurate pricing for Lambert-St Louis-Manila Ninoy Aquino Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Manila Ninoy Aquino Intl flights.
Search Deals
From Lambert-St Louis to Southeast Asia
Search Deals
One-way flight from Lambert-St Louis to Southeast Asia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($274 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from St. Louis to Southeast Asia that are best for you.

Fly from

St. Louis

Fly to

Southeast Asia

Route

Depart

Return

Price

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/20

2:50 pm-4:50 pm

2 stops37h 00m

Ho Chi Minh City

Mon 4/27

5:30 pm-2:11 pm

2 stops32h 41m

$877

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 1/22

2:50 pm-10:30 am

2 stops30h 40m

Ho Chi Minh City

Fri 1/30

5:50 pm-1:54 pm

2 stops57h 04m

$925

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/19

9:34 am-10:35 am

2 stops36h 01m

Ho Chi Minh City

Mon 4/27

11:05 am-11:16 pm

2 stops48h 11m

$936

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/19

7:04 am-12:20 am

2 stops28h 16m

Ho Chi Minh City

Thu 2/19

7:15 am-6:03 pm

2 stops23h 48m

$936

St. LouisKuala Lumpur

STL - KUL

STLKUL

Lambert-St Louis

Wed 11/19

6:00 am-10:25 pm

2 stops26h 25m

Kuala Lumpur Intl

Tue 11/25

11:55 pm-9:58 pm

2 stops36h 03m

$947

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/26

2:50 pm-4:50 pm

2 stops37h 00m

Ho Chi Minh City

Tue 3/31

10:50 am-11:55 pm

2 stops49h 05m

$949

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 2/9

2:50 pm-4:45 pm

2 stops36h 55m

Ho Chi Minh City

Mon 3/9

5:50 pm-1:51 pm

2 stops56h 01m

$951

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/27

2:50 pm-10:00 pm

2 stops42h 10m

Ho Chi Minh City

Tue 3/31

12:50 pm-2:11 pm

2 stops37h 21m

$957

St. LouisKuala Lumpur

STL - KUL

STLKUL

Lambert-St Louis

Sun 2/1

6:40 pm-6:45 am

2 stops46h 05m

Kuala Lumpur Intl

Wed 2/25

2:15 pm-10:00 pm

2 stops45h 45m

$958

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Mon 12/1

6:34 am-12:55 am

2 stops29h 21m

Bangkok Suvarnabhumi

Wed 1/28

12:55 am-8:39 pm

2 stops32h 44m

$960

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Southeast Asia

What is the cheapest month to book a flight from St. Louis to Southeast Asia?

Currently, July is the cheapest month in which you can book a flight from St. Louis to Southeast Asia (average of $549). Flying from St. Louis to Southeast Asia in June is currently the most expensive (average of $1,263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to YJX?

Find hourly flight availability from St. Louis to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

It’s typically best to fly out from St. Louis to Southeast Asia in the evening. Doing so could potentially save you 33% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from St. Louis to Southeast Asia?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Southeast Asia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to Southeast Asia flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated November 13, 2025.
Read through reviews of airlines operating flights from St. Louis to Southeast Asia, such as ANA, Japan Airlines, and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very good
1,004 reviews
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Japan Airlines
8.3
Very good
1,613 reviews
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Delta
7.9
Good
8,008 reviews
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Cathay Pacific
7.6
Good
1,058 reviews
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
United Airlines
7.4
Good
9,017 reviews
ANA
8.4
Very good
1,004 reviews

Entertainment

7.9

Food

7.7

Crew

8.7

Boarding

8.6

Comfort

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Southeast Asia?

    If you book a flight to Southeast Asia from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • How long is the flight from St. Louis to Southeast Asia?

    There are many flights that can get you from St. Louis to Southeast Asia in 26h 25m. Fly via China Airlines, Cathay Pacific, or Delta to get the fastest option. The distance between St. Louis and Southeast Asia is about 9462 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from St. Louis to Southeast Asia one-way?

    The cheapest airline one-way is Cathay Pacific, with whom users have recently found tickets for as low as $521. However, be on the lookout for offers from Philippine Airlines and EVA Air, as they are both options that can get you from St. Louis to Southeast Asia for a low price.

  • What are the most popular routes from St. Louis to Southeast Asia?

    When deciding which route to take from St. Louis to Southeast Asia consider Lambert-St Louis - Bangkok Suvarnabhumi, Lambert-St Louis - Manila Ninoy Aquino Intl or Lambert-St Louis - Ho Chi Minh City as they are the most popular.

  • Can I find deals for flights from St. Louis to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on St. Louis to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Southeast Asia.

  • Can I find deals for business class flights from St. Louis to Southeast Asia?

    Yes. Cheapflights offers flight deals from St. Louis to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Southeast Asia?

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Southeast Asia (average of $549). Flying from St. Louis to Southeast Asia in June is currently the most expensive (average of $1,263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from St. Louis to Southeast Asia

Discover the top 10 airlines that operate flights from St. Louis to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$761Average$1,340FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$897Average$1,385FlexibilityNo cancel feeOn-time68%
Air CanadaCheapest$907Average$1,523FlexibilityNo cancel feeOn-time67%
Cathay PacificCheapest$915Average$1,310FlexibilityNo cancel feeOn-time72%
China AirlinesCheapest$928Average$994FlexibilityNo cancel feeOn-time70%
Japan AirlinesCheapest$949Average$1,179FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$962Average$1,320FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$966Average$1,182FlexibilityNo cancel feeOn-time71%
ANACheapest$986Average$1,192FlexibilityNo cancel feeOn-time80%
DeltaCheapest$990Average$1,438FlexibilityNo cancel feeOn-timeN/A

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