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$664+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SGN
Jun 19 — Jun 261
Fri 6/19
Fri 6/26
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 May 20, 2026.

This United Airlines deal was found by Cheapflights users on 5/20. 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.
Mon 8/318:40 am
STL
-
SGN
2 stops25h 15m
United Airlines
Mon 9/1411:15 pm
SGN
-
STL
2 stops28h 23m
United Airlines
Deal found 5/20$1,118
This FlightHub deal was found by Cheapflights users on 5/18. 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 9/166:00 am
STL
-
SGN
2 stops43h 50m
Multiple Airlines
Thu 9/248:00 pm
SGN
-
STL
2 stops39h 59m
Multiple Airlines
Deal found 5/18$1,127
This FlightHub deal was found by Cheapflights users on 5/18. 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.
Mon 9/146:00 am
STL
-
SGN
2 stops43h 50m
Multiple Airlines
Fri 9/258:00 pm
SGN
-
STL
2 stops54h 21m
Multiple Airlines
Deal found 5/18$1,134
This FlightHub deal was found by Cheapflights users on 5/18. 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 11/17:00 am
STL
-
SGN
2 stops35h 15m
Multiple Airlines
Wed 11/188:55 am
SGN
-
STL
2 stops52h 01m
Multiple Airlines
Deal found 5/18$1,137
This FlightHub deal was found by Cheapflights users on 5/16. 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 10/257:00 am
STL
-
SGN
2 stops36h 15m
Multiple Airlines
Fri 11/67:40 pm
SGN
-
STL
2 stops55h 35m
Multiple Airlines
Deal found 5/16$1,142
This FlightHub deal was found by Cheapflights users on 5/18. 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 11/17:00 am
STL
-
SGN
2 stops35h 15m
Multiple Airlines
Mon 11/168:55 am
SGN
-
STL
2 stops66h 20m
Multiple Airlines
Deal found 5/18$1,145
This United Airlines deal was found by Cheapflights users on 5/20. 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.
Mon 9/215:10 am
STL
-
SGN
3 stops28h 55m
United Airlines
Fri 9/2511:15 pm
SGN
-
STL
2 stops35h 15m
United Airlines
Deal found 5/20$1,172
This United Airlines deal was found by Cheapflights users on 5/18. 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.
Mon 9/1412:59 pm
STL
-
SGN
2 stops44h 56m
United Airlines
Wed 9/2311:15 pm
SGN
-
STL
2 stops24h 58m
United Airlines
Deal found 5/18$1,179
This United Airlines deal was found by Cheapflights users on 5/18. 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.
Thu 9/178:00 am
STL
-
SGN
2 stops25h 55m
United Airlines
Tue 9/227:00 am
SGN
-
STL
2 stops21h 34m
United Airlines
Deal found 5/18$1,182
This FlightHub deal was found by Cheapflights users on 5/18. 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 9/13:04 pm
STL
-
DAD
2 stops32h 31m
Multiple Airlines
Wed 9/912:55 pm
DAD
-
STL
2 stops47h 04m
Multiple Airlines
Deal found 5/18$1,227
This United Airlines deal was found by Cheapflights users on 5/16. 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 11/18:15 pm
STL
-
HAN
2 stops37h 50m
United Airlines
Wed 11/412:25 am
HAN
-
STL
2 stops30h 28m
United Airlines
Deal found 5/16$1,286
This Korean Air deal was found by Cheapflights users on 5/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:20 am
STL
-
DAD
2 stops42h 55m
Korean Air
Mon 11/23:45 pm
DAD
-
STL
2 stops34h 11m
Korean Air
Deal found 5/17$1,379

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 May 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,183
(United Airlines)

One-way from

$664
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$1,404
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. 2% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 20, 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

Wed 9/16

8:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

Wed 10/7

11:15 pm-9:24 pm

2 stops34h 09m

$1,118

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 8/31

8:40 am-9:55 pm

2 stops25h 15m

Ho Chi Minh City

Mon 9/14

11:15 pm-3:38 pm

2 stops28h 23m

$1,118

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 9/21

5:10 am-10:05 pm

3 stops28h 55m

Ho Chi Minh City

Fri 9/25

11:15 pm-10:30 pm

2 stops35h 15m

$1,172

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 9/17

8:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

Mon 9/28

11:15 pm-6:16 pm

2 stops31h 01m

$1,179

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 9/8

5:10 am-10:05 pm

3 stops28h 55m

Ho Chi Minh City

Wed 10/14

11:15 pm-12:13 pm

2 stops24h 58m

$1,183

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 9/16

5:10 am-10:05 pm

3 stops28h 55m

Ho Chi Minh City

Tue 9/22

7:00 am-8:38 pm

2 stops25h 38m

$1,186

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Mon 6/1

7:41 pm-9:00 am

2 stops25h 19m

Da Nang

Mon 6/15

11:00 pm-12:43 am

2 stops37h 43m

$1,816

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 6/13

6:00 am-10:15 pm

2 stops28h 15m

Hanoi Noibai

Sat 6/20

11:35 pm-11:35 pm

2 stops36h 00m

$1,844

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 6/13

6:00 am-10:15 pm

2 stops28h 15m

Hanoi Noibai

Sat 6/20

11:35 pm-11:35 pm

2 stops36h 00m

$1,896

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 6/19

6:35 am-7:15 am

2 stops36h 40m

Hanoi Noibai

Thu 6/25

7:30 pm-12:16 am

2 stops40h 46m

$1,953

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/19

Showing 1-10 of 32 resultsSorted by cheapest first
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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 $539). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,261). 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.

How far ahead should I book a flight from St. Louis to Vietnam?

Booking 88 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Vietnam. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 May 20, 2026.
Read through reviews of airlines operating flights from St. Louis to Vietnam, such as Japan Airlines,ANA, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Japan Airlines
8.3
Very good
1,825 reviews
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
ANA
8.3
Very good
1,211 reviews
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Delta
7.9
Good
8,452 reviews
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Cathay Pacific
7.6
Good
1,340 reviews
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
United Airlines
7.4
Good
9,742 reviews
Japan Airlines
8.3
Very good
1,825 reviews

Food

7.7

Boarding

8.4

Entertainment

7.8

Overall

8.3

Crew

8.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.

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, ANA, and Qatar Airways can get you from St. Louis to Vietnam in just under 25h 55m. Your travel time can differ by up to 10h 45m. 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?

    $442 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on Japan Airlines and United Airlines, with prices starting from $463 and $471, 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 - Da Nang or Lambert-St Louis - Hanoi Noibai.

  • 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 $539). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,261). 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

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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 May 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$903Average$1,079FlexibilityNo cancel feeOn-time71%
China AirlinesCheapest$903Average$994FlexibilityNo cancel feeOn-time70%
Japan AirlinesCheapest$914Average$1,069FlexibilityNo cancel feeOn-time79%
Cathay PacificCheapest$915Average$1,288FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$923Average$1,143FlexibilityNo cancel feeOn-time69%
DeltaCheapest$960Average$1,580FlexibilityNo cancel feeOn-timeN/A
ANACheapest$986Average$1,079FlexibilityNo cancel feeOn-time80%

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