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Southeast Asia

$523+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BKK
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
1 adult, Economy
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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 April 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$988
(Gurufare)

One-way from

$523
(Trip.com)

Popular in

June

Cheapest in

August

Average price

$1,388
Provider with most accurate pricing for Lambert-St Louis-Manila Ninoy Aquino Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Manila Ninoy Aquino Intl flights.
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From Lambert-St Louis to Southeast Asia
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One-way flight from Lambert-St Louis to Southeast Asia
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Highest demand for flights based on searches. 17% potential increase in price ($312 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 4, 2025.

This Gurufare deal was found by Cheapflights users on 4/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/88:20 amSTL - SGN
2 stops25h 35mANA
Mon 9/2911:15 pmSGN - STL
2 stops27h 03mANA
Deal found 4/2$988
This Delta deal was found by Cheapflights users on 4/4. 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 9/87:30 amSTL - SGN
2 stops27h 45mDelta
Tue 10/217:35 amSGN - STL
2 stops25h 14mDelta
Deal found 4/4$991
This United Airlines deal was found by Cheapflights users on 4/4. 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 10/810:30 amSTL - SGN
2 stops23h 25mUnited Airlines
Thu 10/237:00 amSGN - STL
2 stops29h 27mUnited Airlines
Deal found 4/4$1,000
This Orbitz deal was found by Cheapflights users on 4/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:00 amSTL - SGN
2 stops27h 45mMultiple Airlines
Wed 10/2912:10 amSGN - STL
2 stops35h 46mMultiple Airlines
Deal found 4/4$1,036
This KAYAK deal was found by Cheapflights users on 4/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/223:08 pmSTL - CEB
2 stops30h 57mMultiple Airlines
Tue 5/2012:05 pmCEB - STL
2 stops48h 59mMultiple Airlines
Deal found 4/3$1,038
This KAYAK deal was found by Cheapflights users on 4/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:30 amSTL - MNL
2 stops38h 05mMultiple Airlines
Thu 5/224:50 pmMNL - STL
2 stops44h 14mMultiple Airlines
Deal found 4/4$1,040
This Gurufare deal was found by Cheapflights users on 4/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:00 amSTL - BKK
2 stops47h 25mQatar Airways
Tue 11/116:55 pmBKK - STL
2 stops42h 01mQatar Airways
Deal found 4/2$1,042
This Justfly.com deal was found by Cheapflights users on 4/4. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/34:15 pmSTL - MNL
2 stops25h 05mAir Canada
Mon 11/179:25 amMNL - STL
2 stops44h 01mAir Canada
Deal found 4/4$1,050
This Travelocity deal was found by Cheapflights users on 4/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:00 amSTL - BKK
2 stops36h 20mMultiple Airlines
Sun 11/168:10 amBKK - STL
2 stops52h 46mMultiple Airlines
Deal found 4/4$1,057
This FlightHub deal was found by Cheapflights users on 4/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amSTL - HKT
2 stops40h 55mQatar Airways
Tue 12/212:50 amHKT - STL
2 stops36h 06mQatar Airways
Deal found 4/3$1,068
This Travelocity deal was found by Cheapflights users on 4/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:00 amSTL - SIN
2 stops49h 30mMultiple Airlines
Sun 10/2611:10 pmSIN - STL
2 stops37h 46mMultiple Airlines
Deal found 4/2$1,072
This American Airlines deal was found by Cheapflights users on 4/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:04 amSTL - SGN
2 stops26h 56mAmerican Airlines
Tue 5/208:20 amSGN - STL
2 stops26h 44mAmerican Airlines
Deal found 4/3$1,078

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 April 4, 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

Mon 9/8

8:20 am-9:55 pm

2 stops25h 35m

Ho Chi Minh City

Mon 9/29

11:15 pm-2:18 pm

2 stops27h 03m

$988

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 9/8

7:30 am-11:15 pm

2 stops27h 45m

Ho Chi Minh City

Tue 10/21

7:35 am-8:49 pm

2 stops25h 14m

$991

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 9/8

6:35 am-9:55 pm

2 stops27h 20m

Ho Chi Minh City

Sun 10/12

11:15 pm-10:27 am

2 stops47h 12m

$1,003

St. LouisCebu City

STL - CEB

STLCEB

Lambert-St Louis

Tue 4/22

3:08 pm-11:05 am

2 stops30h 57m

Cebu City Mactan Intl

Tue 5/20

12:05 pm-12:04 am

2 stops48h 59m

$1,038

St. LouisManila

STL - MNL

STLMNL

Lambert-St Louis

Tue 4/22

6:30 am-9:35 am

2 stops38h 05m

Manila Ninoy Aquino Intl

Thu 5/22

4:50 pm-12:04 am

2 stops44h 14m

$1,040

St. LouisManila

STL - MNL

STLMNL

Lambert-St Louis

Fri 9/12

4:05 pm-6:20 am

2 stops49h 15m

Manila Ninoy Aquino Intl

Fri 9/19

9:25 am-7:57 pm

2 stops23h 32m

$1,051

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 4/15

7:04 am-10:00 pm

2 stops26h 56m

Ho Chi Minh City

Tue 5/20

8:20 am-11:04 pm

2 stops26h 44m

$1,078

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Wed 9/17

6:30 am-7:20 am

2 stops36h 50m

Bangkok Suvarnabhumi

Sat 9/27

9:05 am-11:59 pm

2 stops50h 54m

$1,094

St. LouisBangkok

STL - BKK

STLBKK

Lambert-St Louis

Thu 8/28

8:20 am-4:35 am

2 stops32h 15m

Bangkok Suvarnabhumi

Wed 9/3

9:35 pm-2:26 pm

2 stops28h 51m

$1,099

St. LouisSingapore

STL - SIN

STLSIN

Lambert-St Louis

Sun 5/11

6:11 pm-6:25 pm

1 stop35h 14m

Singapore Changi

Wed 5/21

9:00 am-10:45 pm

1 stop26h 45m

$1,102

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 48 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, March is the cheapest month in which you can book a flight from St. Louis to Southeast Asia (average of $958). Flying from St. Louis to Southeast Asia in December is currently the most expensive (average of $1,574). 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 April 4, 2025.

When flying from St. Louis to Southeast Asia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Southeast Asia ranges from 0.4 - 15.7 inches per month. July is typically the wettest month, when rainfall can reach 15.7 in. February is typically the driest time to visit Southeast Asia when rainfall is around 0.4 in.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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 April 4, 2025.
Read reviews from past customers who have flown Korean Air, Japan Airlines and ANA from St. Louis to Southeast Asia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,053 reviews
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,441 reviews
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
831 reviews
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.2
Very good
438 reviews
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Emirates
8.0
Very good
3,192 reviews
Korean Air
8.4
Very good
1,053 reviews

Overall

8.4

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $538. However, be on the lookout for offers from United Airlines and Cathay Pacific, 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, March is the cheapest month in which you can book a flight from St. Louis to Southeast Asia (average of $958). Flying from St. Louis to Southeast Asia in December is currently the most expensive (average of $1,574). 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 April 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$940Average$1,357FlexibilityNo cancel feeOn-time69%
DeltaCheapest$990Average$1,562FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$993Average$1,402FlexibilityNo cancel feeOn-time67%
ANACheapest$1,020Average$1,270FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$1,062Average$1,395FlexibilityNo cancel feeOn-time79%
Turkish AirlinesCheapest$1,065Average$1,198FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$1,070Average$1,205FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,124Average$1,879FlexibilityNo cancel feeOn-time81%
Cathay PacificCheapest$1,208Average$1,427FlexibilityNo cancel feeOn-time72%
Qatar AirwaysCheapest$1,213Average$1,744FlexibilityNo cancel feeOn-time68%

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