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$505+ Cheap flights from St. Louis (STL) to Vietnam

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SGN
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap flight deals from St. Louis to Vietnam

Cheapest flights from St. Louis to Vietnam
Explore the most affordable flight options available from St. Louis to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This United Airlines deal was found by Cheapflights users on 3/22. 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.
Tue 9/16:14 am
STL
-
SGN
2 stops27h 41m
United Airlines
Tue 10/611:15 pm
SGN
-
STL
2 stops33h 54m
United Airlines
Deal found 3/22$903
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Sun 9/278:15 pm
STL
-
SGN
3 stops37h 50m
United Airlines
Thu 10/17:00 am
SGN
-
STL
2 stops27h 06m
United Airlines
Deal found 3/20$910
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Sun 5/108:30 pm
STL
-
SGN
3 stops37h 35m
United Airlines
Mon 5/187:00 am
SGN
-
STL
2 stops34h 47m
United Airlines
Deal found 3/21$918
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Fri 9/115:10 am
STL
-
SGN
3 stops28h 55m
United Airlines
Tue 9/157:00 am
SGN
-
STL
2 stops23h 24m
United Airlines
Deal found 3/22$960
This United Airlines deal was found by Cheapflights users on 3/22. 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 11/46:30 am
STL
-
SGN
2 stops28h 45m
United Airlines
Wed 11/1111:05 pm
SGN
-
STL
2 stops36h 49m
United Airlines
Deal found 3/22$981
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Tue 9/85:00 am
STL
-
SGN
2 stops28h 55m
United Airlines
Mon 10/1211:15 pm
SGN
-
STL
2 stops30h 54m
United Airlines
Deal found 3/25$1,003
This oojo deal was found by Cheapflights users on 3/22. 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 10/256:41 am
STL
-
HAN
2 stops45h 49m
China Airlines
Thu 10/295:30 pm
HAN
-
STL
2 stops32h 56m
China Airlines
Deal found 3/22$1,015
This BusinessClass deal was found by Cheapflights users on 3/22. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:24 pm
STL
-
SGN
2 stops30h 16m
Multiple Airlines
Sun 11/85:50 pm
SGN
-
STL
2 stops33h 36m
Multiple Airlines
Deal found 3/22$1,023
This FlightHub deal was found by Cheapflights users on 3/22. 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.
Sun 9/273:24 pm
STL
-
HAN
2 stops37h 26m
Multiple Airlines
Mon 10/196:00 pm
HAN
-
STL
2 stops32h 26m
Multiple Airlines
Deal found 3/22$1,043
This oojo deal was found by Cheapflights users on 3/23. 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 9/277:32 pm
STL
-
HAN
2 stops27h 03m
China Airlines
Sun 10/1811:35 am
HAN
-
STL
2 stops48h 24m
China Airlines
Deal found 3/23$1,044
This FlightHub deal was found by Cheapflights users on 3/22. 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.
Sun 9/273:24 pm
STL
-
HAN
2 stops37h 26m
Multiple Airlines
Sat 10/1712:05 pm
HAN
-
STL
2 stops47h 54m
Multiple Airlines
Deal found 3/22$1,082
This FlightHub deal was found by Cheapflights users on 3/23. 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.
Wed 11/253:24 pm
STL
-
HAN
2 stops36h 51m
Multiple Airlines
Sun 11/2912:35 pm
HAN
-
STL
2 stops48h 24m
Multiple Airlines
Deal found 3/23$1,112

Find flight deals from St. Louis to Vietnam

Keep the following information in mind while searching for St. Louis to Vietnam flight deals. Data was last updated March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$903
(United Airlines)

One-way from

$505
(IEagle)

Popular in

December

Cheapest in

November

Average price

$1,114
Provider with most accurate pricing for Lambert-St Louis-Ho Chi Minh City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Ho Chi Minh City flights.
Search Deals
From Lambert-St Louis to Vietnam
Search Deals
One-way flight from Lambert-St Louis to Vietnam
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Vietnam 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 March 25, 2026.
Use the filters below to find and compare flights from St. Louis to Vietnam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 9/1

5:00 am-10:05 pm

3 stops29h 05m

Ho Chi Minh City

Tue 10/6

11:15 pm-5:53 pm

2 stops30h 38m

$907
Quickest round-trip

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Fri 9/11

5:10 am-10:05 pm

3 stops28h 55m

Ho Chi Minh City

Tue 9/15

7:00 am-6:24 pm

2 stops23h 24m

$960

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 5/12

7:09 pm-10:05 pm

3 stops38h 56m

Ho Chi Minh City

Tue 6/2

7:00 am-12:11 pm

3 stops41h 11m

$1,060

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Sat 5/9

4:15 pm-10:05 pm

3 stops65h 50m

Ho Chi Minh City

Fri 5/22

7:00 am-8:43 pm

3 stops25h 43m

$1,125

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/21

5:51 am-6:40 am

2 stops36h 49m

Hanoi Noibai

Tue 4/28

8:40 pm-6:04 pm

2 stops33h 24m

$1,147

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 5/5

5:51 am-6:40 am

2 stops36h 49m

Hanoi Noibai

Tue 5/12

8:40 pm-6:04 pm

2 stops33h 24m

$1,154

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 5/7

8:25 am-4:50 pm

2 stops44h 25m

Hanoi Noibai

Thu 5/14

5:50 pm-9:05 pm

2 stops39h 15m

$1,242

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/21

4:30 pm-2:00 pm

2 stops33h 30m

Hanoi Noibai

Tue 4/28

7:30 pm-11:46 pm

2 stops40h 16m

$1,323

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 5/4

7:00 am-4:50 pm

2 stops45h 50m

Hanoi Noibai

Sun 5/24

11:30 am-10:50 pm

2 stops23h 20m

$1,329

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Sat 5/9

4:46 pm-11:35 am

2 stops30h 49m

Da Nang

Sat 5/16

12:55 pm-3:16 pm

2 stops38h 21m

$1,367

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 27 resultsSorted by cheapest first
1
2
3

Best time to book a flight from St. Louis to Vietnam

Have a flexible travel schedule? Discover the best time to fly to Vietnam 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 Vietnam

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

Currently, July is the cheapest month in which you can book a flight from St. Louis to Vietnam (average of $554). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,282). 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.

Reviews of airlines servicing Vietnam

Get insights into the airlines that provide service to Vietnam. 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 Vietnam. Reviews last updated March 25, 2026.
Read through reviews of airlines operating flights from St. Louis to Vietnam, such as ANA,Japan Airlines, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.
ANA
8.4
Very good
1,141 reviews
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.
Japan Airlines
8.3
Very good
1,748 reviews
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.
Delta
7.9
Good
8,325 reviews
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.
Cathay Pacific
7.6
Good
1,228 reviews
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.
United Airlines
7.4
Good
9,478 reviews
ANA
8.4
Very good
1,141 reviews

Comfort

8.2

Boarding

8.6

Crew

8.7

Entertainment

8.0

Overall

8.4

Food

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

OKA - HND

food is good international entertainment is best but not in okinwa to tokyo.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Vietnam. 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 Vietnam?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Vietnam from St. Louis.

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

    United Airlines and Delta can get you from St. Louis to Vietnam in just under 29h 05m. Your travel time can differ by up to 8h 59m. The distance from St. Louis to Vietnam is about 8834 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $293 is the cheapest one-way deal found within the past few days, from Japan Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $471 and $519, respectively.

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

    The most popular route from St. Louis to Vietnam is Lambert-St Louis - Ho Chi Minh City. You may also consider Lambert-St Louis - Hanoi Noibai or Lambert-St Louis - Da Nang.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Vietnam 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 Vietnam?

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Vietnam (average of $554). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,282). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from St. Louis to Vietnam

Discover the top 7 airlines that operate flights from St. Louis to Vietnam. 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$903Average$1,084FlexibilityNo cancel feeOn-time71%
China AirlinesCheapest$903Average$994FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$915Average$1,288FlexibilityNo cancel feeOn-time72%
Japan AirlinesCheapest$921Average$1,089FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$923Average$1,129FlexibilityNo cancel feeOn-time69%
DeltaCheapest$960Average$1,574FlexibilityNo cancel feeOn-timeN/A
ANACheapest$984Average$1,032FlexibilityNo cancel feeOn-time80%

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