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

United Airlines and Cathay Pacific can get you from St. Louis to Vietnam in just under 34h 30m. Your travel time can differ by up to 38h 40m. 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 ANA, with prices starting from $520 and $522, respectively.

In terms of precipitation, rainfall in Vietnam ranges from 0.0 - 13.4 inches per month. September is typically the wettest month, when rainfall can reach 13.4 in. February is typically the driest time to visit Vietnam when rainfall is around 0.0 in.

If weather is an important factor for your trip to Vietnam, 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 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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.

What are the most popular airlines that fly from St. Louis to Vietnam?

Before booking your flight from St. Louis to Vietnam check out the most popular airlines for this route: United Airlines, ANA or Japan Airlines.

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

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

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.

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.

$453+ Flights from St. Louis to Vietnam

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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 December 28, 2025.

Sat 12/277:00 amSTL - DAD

2 stops39h 40mMultiple Airlines

Sat 1/31:00 pmDAD - STL

2 stops23h 50mMultiple Airlines

Deal found 12/26

$29,687

Best flights from St. Louis to Vietnam
Discover carefully curated flight deals from St. Louis to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Sat 1/318:45 amSTL - SGN

3 stops73h 10mUnited Airlines

Wed 2/186:00 amSGN - STL

3 stops27h 26mUnited Airlines

Deal found 12/26

$915

Tue 1/2011:05 amSTL - SGN

2 stops34h 30mCathay Pacific

Mon 4/276:20 pmSGN - STL

2 stops39h 28mCathay Pacific

Deal found 12/26

$919

Mon 1/266:10 amSTL - SGN

2 stops28h 10mDelta

Tue 3/311:55 pmSGN - STL

2 stops43h 11mDelta

Deal found 12/26

$938

Wed 3/118:25 amSTL - HAN

3 stops37h 55mMultiple Airlines

Sat 3/215:30 pmHAN - STL

2 stops44h 00mMultiple Airlines

Deal found 12/26

$1,056

Thu 1/228:05 amSTL - SGN

2 stops48h 45mUnited Airlines

Fri 1/307:30 amSGN - STL

2 stops26h 28mUnited Airlines

Deal found 12/27

$923

Thu 1/2211:05 amSTL - HAN

2 stops34h 00mCathay Pacific

Mon 1/267:30 pmHAN - STL

2 stops41h 29mCathay Pacific

Deal found 12/27

$924

Mon 1/196:44 pmSTL - SGN

2 stops40h 36mCathay Pacific

Mon 4/276:20 pmSGN - STL

2 stops39h 28mCathay Pacific

Deal found 12/26

$925

Wed 1/214:35 pmSTL - SGN

3 stops41h 20mUnited Airlines

Fri 3/276:00 amSGN - STL

3 stops50h 57mUnited Airlines

Deal found 12/27

$949

Tue 1/204:35 pmSTL - SGN

3 stops41h 20mUnited Airlines

Fri 3/276:00 amSGN - STL

3 stops50h 57mUnited Airlines

Deal found 12/27

$949

Fri 1/236:57 pmSTL - DAD

2 stops37h 33mKorean Air

Tue 1/2711:20 pmDAD - STL

2 stops29h 47mKorean Air

Deal found 12/25

$3,123

Thu 1/226:30 amSTL - HAN

3 stops27h 35mUnited Airlines

Sun 1/2512:25 amHAN - STL

2 stops34h 35mUnited Airlines

Deal found 12/27

$1,226

Sun 3/225:50 amSTL - HAN

2 stops40h 30mMultiple Airlines

Sat 4/45:50 pmHAN - STL

2 stops39h 55mMultiple Airlines

Deal found 12/26

$1,931

Sat 3/219:35 pmSTL - HAN

2 stops54h 55mMultiple Airlines

Sat 4/45:50 pmHAN - STL

2 stops43h 40mMultiple Airlines

Deal found 12/26

$1,943

Sun 6/75:00 amSTL - HAN

2 stops29h 15mUnited Airlines

Sun 6/2811:35 pmHAN - STL

3 stops51h 46mUnited Airlines

Deal found 12/26

$1,708

Mon 2/912:11 pmSTL - HAN

2 stops29h 44mMultiple Airlines

Sun 2/1512:20 amHAN - STL

3 stops30h 38mMultiple Airlines

Deal found 12/25

$2,298

Mon 2/162:47 pmSTL - DAD

2 stops29h 23mMultiple Airlines

Fri 3/205:35 pmDAD - STL

2 stops31h 40mMultiple Airlines

Deal found 12/26

$2,333

Mon 2/163:15 pmSTL - DAD

3 stops41h 15mEmirates

Fri 3/2011:30 pmDAD - STL

3 stops34h 46mEmirates

Deal found 12/27

$7,530

Last-minute flights from St. Louis to Vietnam
Discover last-minute flight deals from St. Louis to Vietnam. Data last updated December 28, 2025 and is based on user searches.

Sat 1/174:15 pmSTL - SGN

3 stops65h 40mUnited Airlines

Sun 3/226:00 amSGN - STL

3 stops51h 07mUnited Airlines

Deal found 12/27

$954

Mon 1/196:44 pmSTL - SGN

2 stops40h 36mCathay Pacific

Mon 4/276:20 pmSGN - STL

2 stops41h 28mCathay Pacific

Deal found 12/28

$925

Mon 1/196:10 amSTL - SGN

2 stops28h 10mDelta

Wed 3/258:00 amSGN - STL

2 stops25h 06mDelta

Deal found 12/26

$938

Tue 1/206:00 amSTL - SGN

2 stops29h 20mCathay Pacific

Mon 4/2711:05 amSGN - STL

2 stops48h 43mCathay Pacific

Deal found 12/28

$919

Wed 1/218:05 amSTL - SGN

2 stops48h 45mUnited Airlines

Tue 2/311:05 pmSGN - STL

2 stops28h 25mUnited Airlines

Deal found 12/26

$886

Wed 1/214:35 pmSTL - SGN

3 stops41h 20mUnited Airlines

Fri 3/276:00 amSGN - STL

3 stops50h 57mUnited Airlines

Deal found 12/27

$949

Wed 1/214:35 pmSTL - SGN

3 stops41h 20mUnited Airlines

Sun 3/226:00 amSGN - STL

3 stops51h 07mUnited Airlines

Deal found 12/27

$950

Thu 1/229:57 amSTL - SGN

2 stops46h 53mUnited Airlines

Fri 1/307:30 amSGN - STL

2 stops27h 30mUnited Airlines

Deal found 12/25

$923

Thu 1/2211:05 amSTL - HAN

2 stops34h 00mCathay Pacific

Mon 1/267:30 pmHAN - STL

2 stops41h 29mCathay Pacific

Deal found 12/27

$924

Thu 1/226:30 amSTL - HAN

3 stops27h 35mUnited Airlines

Sun 1/2512:25 amHAN - STL

2 stops34h 35mUnited Airlines

Deal found 12/27

$1,226

Sat 1/318:45 amSTL - SGN

3 stops73h 10mUnited Airlines

Wed 2/186:00 amSGN - STL

3 stops27h 26mUnited Airlines

Deal found 12/26

$915

Sat 1/311:40 pmSTL - HAN

2 stops61h 00mCathay Pacific

Wed 2/1811:05 amHAN - STL

2 stops25h 43mCathay Pacific

Deal found 12/26

$980

One-way flights from St. Louis to Vietnam
Search for one-way flight options from St. Louis to Vietnam. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Sun 3/87:00 amSTL - SGN

2 stops37h 25mMultiple Airlines

Deal found 12/27

$453

Mon 2/1610:11 pmSTL - SGN

3 stops37h 04mMultiple Airlines

Deal found 12/27

$476

Sun 2/156:55 pmSTL - SGN

3 stops39h 00mUnited Airlines

Deal found 12/27

$493

Wed 2/187:41 amSTL - SGN

2 stops27h 34mANA

Deal found 12/28

$495

Sat 3/285:30 pmSTL - HAN

2 stops28h 40mMultiple Airlines

Deal found 12/27

$497

Tue 3/37:00 amSTL - HAN

2 stops26h 30mJapan Airlines

Deal found 12/28

$499

Wed 2/186:55 pmSTL - SGN

3 stops39h 00mUnited Airlines

Deal found 12/26

$499

Sat 3/215:30 pmSTL - HAN

2 stops52h 00mMultiple Airlines

Deal found 12/25

$507

Tue 2/174:30 pmSTL - SGN

3 stops41h 25mUnited Airlines

Deal found 12/27

$513

Sun 3/89:00 amSTL - SGN

3 stops49h 55mUnited Airlines

Deal found 12/27

$541

Sun 3/158:06 pmSTL - HAN

3 stops52h 04mMultiple Airlines

Deal found 12/25

$557

Thu 1/152:50 pmSTL - DAD

2 stops33h 25mMultiple Airlines

Deal found 12/26

$602

Find flight deals from St. Louis to Vietnam

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$886 (United Airlines)
One-way from	$453 (Travelocity)
Popular in	December
Cheapest in	November
Average price	$1,605

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. 0% potential increase in price ($10 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Sat 1/31

8:45 am-10:55 pm

3 stops73h 10m

Ho Chi Minh City

Wed 2/18

6:00 am-8:26 pm

3 stops27h 26m

$915

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/20

11:05 am-10:35 am

2 stops34h 30m

Ho Chi Minh City

Mon 4/27

6:20 pm-9:48 pm

2 stops39h 28m

$919

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Thu 1/22

8:05 am-9:50 pm

2 stops48h 45m

Ho Chi Minh City

Fri 1/30

7:30 am-8:58 pm

2 stops26h 28m

$923

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 1/22

11:05 am-10:05 am

2 stops34h 00m

Hanoi Noibai

Mon 1/26

7:30 pm-11:59 pm

2 stops41h 29m

$924

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/19

6:44 pm-12:20 am

2 stops40h 36m

Ho Chi Minh City

Mon 4/27

6:20 pm-9:48 pm

2 stops39h 28m

$925

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 1/26

6:10 am-11:20 pm

2 stops28h 10m

Ho Chi Minh City

Tue 3/31

1:55 pm-9:06 pm

2 stops43h 11m

$938

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 1/21

4:35 pm-10:55 pm

3 stops41h 20m

Ho Chi Minh City

Fri 3/27

6:00 am-8:57 pm

3 stops50h 57m

$949

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 1/20

4:35 pm-10:55 pm

3 stops41h 20m

Ho Chi Minh City

Fri 3/27

6:00 am-8:57 pm

3 stops50h 57m

$949

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

8:25 am-10:20 am

3 stops37h 55m

Hanoi Noibai

Sat 3/21

5:30 pm-1:30 am

2 stops44h 00m

$1,056

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 1/22

6:30 am-11:05 pm

3 stops27h 35m

Hanoi Noibai

Sun 1/25

12:25 am-10:00 pm

2 stops34h 35m

$1,226

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 29 results

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 $549). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,349). 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

Read through reviews of airlines operating flights from St. Louis to Vietnam, such as ANA, Japan Airlines, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

ANA

8.4

Very good

1,049 reviews

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

Japan Airlines

8.3

Very good

1,662 reviews

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

Delta

7.9

Good

8,022 reviews

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

Cathay Pacific

7.6

Good

1,106 reviews

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

United Airlines

7.4

Good

9,116 reviews

ANA

8.4

Very good

1,049 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Dec 2025

HND - LAX

I always take ANA because of the great service and overall experience.

Related info for your journey

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 Cathay Pacific can get you from St. Louis to Vietnam in just under 34h 30m. Your travel time can differ by up to 38h 40m. 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 ANA, with prices starting from $520 and $522, 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 $549). Flying from St. Louis to Vietnam in June is currently the most expensive (average of $1,349). 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 10 airlines flying from St. Louis to Vietnam

Airline	Cheapest	Average	Flexibility	On-time
Korean Air	Cheapest$761	Average$1,166	FlexibilityNo cancel fee	On-time81%
China Airlines	Cheapest$903	Average$994	FlexibilityNo cancel fee	On-time70%
Cathay Pacific	Cheapest$915	Average$1,306	FlexibilityNo cancel fee	On-time72%
United Airlines	Cheapest$936	Average$1,124	FlexibilityNo cancel fee	On-time69%
Japan Airlines	Cheapest$946	Average$1,116	FlexibilityNo cancel fee	On-time79%
Delta	Cheapest$960	Average$1,448	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$966	Average$1,087	FlexibilityNo cancel fee	On-time71%
ANA	Cheapest$986	Average$1,055	FlexibilityNo cancel fee	On-time80%
EVA Air	Cheapest$1,008	Average$1,362	FlexibilityNo cancel fee	On-time74%
Air Canada	Cheapest$1,437	Average$1,761	FlexibilityNo cancel fee	On-time67%

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$453+ 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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to Vietnam

Cheapest flights from St. Louis to VietnamExplore 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 December 28, 2025.

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 December 28, 2025.

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 December 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Vietnam that are best for you.

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.

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?

Reviews of airlines servicing Vietnam

Read through reviews of airlines operating flights from St. Louis to Vietnam, such as ANA, Japan Airlines, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

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

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

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.

Alternative routes for St. Louis to Vietnam

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from St. Louis to Vietnam

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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 December 28, 2025.