What is the cheapest airline that flies from Lambert-St Louis to Vietnam?

Qatar Airways, Cathay Pacific, and Malaysia Airlines are the most popular carriers operating from Lambert-St Louis to Vietnam

What airlines fly to Vietnam?

United Airlines, Japan Airlines and Cathay Pacific are the top three most popular airlines that fly to Vietnam from St. Louis according to our data. United Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Vietnam. Keep in mind that there are 6 different airlines that fly to Vietnam on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Vietnam?

Prices for flights from Lambert-St Louis Airport to Vietnam are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Vietnam?

As of September 2026, there are 6 operators available to choose from for flights from Lambert-St Louis Airport to Vietnam.

How old do you have to be to fly from Lambert-St Louis Airport to Vietnam?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Vietnam.

What documentation or ID do you need to fly to Vietnam?

The required travel and health documents for your Vietnam trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Vietnam. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$530 Cheap Flights from St. Louis to Vietnam in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Vietnam

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:26 am - 12:20 pmSTL Lambert-St Louis-HAN Hanoi Noibai

39h 54m2 stops Chicago O'Hare Intl Doha Hamad Intl

7:10 pm - 6:17 pmHAN Hanoi Noibai-STL Lambert-St Louis

36h 07m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,035Qatar Airways

Mon, Nov 9 - Mon, Nov 16

7:26 am - 12:20 pmSTL Lambert-St Louis-HAN Hanoi Noibai

39h 54m2 stops Chicago O'Hare Intl Doha Hamad Intl

7:10 pm - 6:17 pmHAN Hanoi Noibai-STL Lambert-St Louis

36h 07m2 stops Doha Hamad Intl Chicago O'Hare Intl

$1,040Qatar Airways

Mon, Nov 9 - Mon, Nov 16

11:01 am - 12:20 amSTL Lambert-St Louis-SGN Ho Chi Minh City

25h 19m2 stops Chicago O'Hare Intl Hong Kong Intl

7:10 am - 8:57 pmSGN Ho Chi Minh City-STL Lambert-St Louis

25h 47m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,069Cathay Pacific

Mon, Sep 21 - Mon, Oct 12

11:01 am - 10:05 amSTL Lambert-St Louis-SGN Ho Chi Minh City

35h 04m2 stops Chicago O'Hare Intl Hong Kong Intl

7:15 am - 8:57 pmSGN Ho Chi Minh City-STL Lambert-St Louis

25h 42m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,069Cathay Pacific

Thu, Oct 1 - Thu, Oct 29

11:01 am - 5:25 amSTL Lambert-St Louis-SGN Ho Chi Minh City

30h 24m2 stops Chicago O'Hare Intl Tokyo Haneda

8:20 am - 10:50 amSGN Ho Chi Minh City-STL Lambert-St Louis

38h 30m2 stops Tokyo Narita Chicago O'Hare Intl

$1,115Japan Airlines

Sun, Sep 27 - Sun, Oct 4

10:50 am - 9:50 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

46h 00m2 stops Chicago O'Hare Intl Tokyo Haneda

11:05 pm - 9:53 pmSGN Ho Chi Minh City-STL Lambert-St Louis

35h 48m2 stops Tokyo Haneda Newark

$1,147United Airlines

Mon, Dec 7 - Wed, Jan 13

6:33 am - 9:50 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

50h 17m2 stops Chicago O'Hare Intl Tokyo Haneda

11:05 pm - 4:53 pmSGN Ho Chi Minh City-STL Lambert-St Louis

30h 48m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,147United Airlines

Tue, Dec 1 - Tue, Jan 19

11:15 am - 9:50 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

45h 35m2 stops Chicago O'Hare Intl Tokyo Haneda

11:05 pm - 6:08 pmSGN Ho Chi Minh City-STL Lambert-St Louis

32h 03m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,149ANA

Mon, Jan 4 - Tue, Feb 2

8:05 am - 9:50 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

48h 45m2 stops Chicago O'Hare Intl Tokyo Haneda

11:05 pm - 6:08 pmSGN Ho Chi Minh City-STL Lambert-St Louis

32h 03m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,158ANA

Mon, Jan 4 - Tue, Feb 2

7:26 am - 10:25 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

25h 59m2 stops Chicago O'Hare Intl Tokyo Narita

11:45 pm - 1:19 pmSGN Ho Chi Minh City-STL Lambert-St Louis

26h 34m2 stops Tokyo Haneda Chicago O'Hare Intl

$2,140Japan Airlines

Tue, Dec 8 - Wed, Dec 30

Cheap last minute flights

Enter your travel dates to find the best prices.

9:32 am - 12:20 amSTL Lambert-St Louis-SGN Ho Chi Minh City

26h 48m2 stops Chicago O'Hare Intl Hong Kong Intl

7:10 am - 11:59 pmSGN Ho Chi Minh City-STL Lambert-St Louis

28h 49m2 stops Hong Kong Intl Seattle/Tacoma Intl

$1,076Multiple Airlines

Mon, Sep 7 - Mon, Sep 28

8:07 pm - 12:20 amSTL Lambert-St Louis-SGN Ho Chi Minh City

40h 13m2 stops Chicago O'Hare Intl Hong Kong Intl

6:20 pm - 8:44 pmSGN Ho Chi Minh City-STL Lambert-St Louis

38h 24m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,086Cathay Pacific

Sun, Sep 6 - Mon, Sep 28

6:53 pm - 10:05 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

39h 12m3 stops Chicago O'Hare Intl Los Angeles Hong Kong Intl

7:00 am - 9:09 pmSGN Ho Chi Minh City-STL Lambert-St Louis

26h 09m2 stops Tokyo Narita Newark

$1,153United Airlines

Mon, Sep 7 - Mon, Sep 28

5:10 am - 10:05 pmSTL Lambert-St Louis-SGN Ho Chi Minh City

28h 55m3 stops Denver Intl Los Angeles Hong Kong Intl

7:00 am - 10:59 pmSGN Ho Chi Minh City-STL Lambert-St Louis

27h 59m2 stops Tokyo Narita Chicago O'Hare Intl

$1,153United Airlines

Sun, Sep 6 - Mon, Sep 28

7:58 pm - 11:00 amSTL Lambert-St Louis-SGN Ho Chi Minh City

51h 02m3 stops Denver Intl Los Angeles Incheon Intl

12:10 am - 11:32 amSGN Ho Chi Minh City-STL Lambert-St Louis

47h 22m3 stops Incheon Intl Los Angeles Las Vegas Harry Reid Intl

$1,225Multiple Airlines

Sun, Sep 6 - Sun, Sep 27

8:55 am - 4:25 amSTL Lambert-St Louis-SGN Ho Chi Minh City

31h 30m3 stops Toronto Pearson Intl Frankfurt am Main Kastrup Copenhagen

3:45 pm - 2:00 pmSGN Ho Chi Minh City-STL Lambert-St Louis

34h 15m3 stops Taipei City Taiwan Taoyuan Intl Vancouver Intl Toronto Pearson Intl

$2,248Multiple Airlines

Mon, Sep 7 - Mon, Sep 28

3:30 pm - 6:25 amSTL Lambert-St Louis-SGN Ho Chi Minh City

26h 55m1 stop Frankfurt am Main

5:30 pm - 6:38 pmSGN Ho Chi Minh City-STL Lambert-St Louis

37h 08m2 stops Taipei City Taiwan Taoyuan Intl Seattle/Tacoma Intl

$4,485Multiple Airlines

Sun, Sep 6 - Mon, Sep 28

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Japan Airlines flights from St. Louis to Vietnam

Our best Japan Airlines deals on St. Louis to Vietnam flight tickets

Japan Airlines

Sep 27

STL11:01 amLambert-St Louis

30h 24m

2 stops

SGN5:25 amHo Chi Minh City

Oct 4

SGN8:20 amHo Chi Minh City

38h 30m

2 stops

STL10:50 amLambert-St Louis

$1,115

Japan Airlines

Dec 5

STL7:26 amLambert-St Louis

25h 59m

2 stops

HAN10:25 pmHanoi Noibai

Dec 18

HAN11:55 pmHanoi Noibai

29h 55m

2 stops

STL4:50 pmLambert-St Louis

$1,252

Cathay Pacific flights from St. Louis to Vietnam

Our best Cathay Pacific deals on St. Louis to Vietnam flight tickets

Cathay Pacific

Oct 1

STL11:01 amLambert-St Louis

35h 04m

2 stops

SGN10:05 amHo Chi Minh City

Oct 29

SGN7:15 amHo Chi Minh City

25h 42m

2 stops

STL8:57 pmLambert-St Louis

$1,069

Cathay Pacific

Sep 27

STL5:18 pmLambert-St Louis

43h 02m

2 stops

SGN12:20 amHo Chi Minh City

Oct 4

SGN6:20 pmHo Chi Minh City

38h 37m

2 stops

STL8:57 pmLambert-St Louis

$1,086

Cathay Pacific

Nov 26

STL11:13 amLambert-St Louis

24h 17m

2 stops

SGN12:30 amHo Chi Minh City

Dec 12

SGN11:45 amHo Chi Minh City

21h 34m

2 stops

STL8:19 pmLambert-St Louis

$1,104

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHanoi

STL Lambert-St Louis - HAN Hanoi Noibai

STLHAN

Lambert-St Louis

Mon 11/9

7:26 am-12:20 pm

2 stops39h 54m

Hanoi Noibai

Mon 11/16

7:10 pm-6:17 pm

2 stops36h 07m

$1,035

St. LouisHanoi

STL Lambert-St Louis - HAN Hanoi Noibai

STLHAN

Lambert-St Louis

Mon 11/9

7:26 am-12:20 pm

2 stops39h 54m

Hanoi Noibai

Mon 11/16

7:10 pm-6:17 pm

2 stops36h 07m

$1,040

Quickest round-trip

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Mon 9/21

11:01 am-12:20 am

2 stops25h 19m

Ho Chi Minh City

Mon 10/12

7:10 am-8:57 pm

2 stops25h 47m

$1,069

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Thu 10/1

11:01 am-10:05 am

2 stops35h 04m

Ho Chi Minh City

Thu 10/29

7:15 am-8:57 pm

2 stops25h 42m

$1,069

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Sun 9/27

11:01 am-5:25 am

2 stops30h 24m

Ho Chi Minh City

Sun 10/4

8:20 am-10:50 am

2 stops38h 30m

$1,115

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Mon 12/7

10:50 am-9:50 pm

2 stops46h 00m

Ho Chi Minh City

Wed 1/13

11:05 pm-9:53 pm

2 stops35h 48m

$1,147

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Tue 12/1

6:33 am-9:50 pm

2 stops50h 17m

Ho Chi Minh City

Tue 1/19

11:05 pm-4:53 pm

2 stops30h 48m

$1,147

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Mon 1/4

11:15 am-9:50 pm

2 stops45h 35m

Ho Chi Minh City

Tue 2/2

11:05 pm-6:08 pm

2 stops32h 03m

$1,149

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Mon 1/4

8:05 am-9:50 pm

2 stops48h 45m

Ho Chi Minh City

Tue 2/2

11:05 pm-6:08 pm

2 stops32h 03m

$1,158

St. LouisHo Chi Minh City

STL Lambert-St Louis - SGN Ho Chi Minh City

STLSGN

Lambert-St Louis

Tue 12/8

7:26 am-10:25 pm

2 stops25h 59m

Ho Chi Minh City

Wed 12/30

11:45 pm-1:19 pm

2 stops26h 34m

$2,140

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Vietnam

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Vietnam?

The month of April is, on average, the cheapest month to fly to Vietnam from St. Louis, with most prices found around $1,073. If you don’t want to visit Vietnam in April, then you should wait until September to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,075.

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

You are more likely to see cheaper flights to Vietnam from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Vietnam for around $1,232 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Vietnam from St. Louis for as low as $1,005 on momondo.

Cheap St. Louis to Vietnam flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Vietnam

Best Price Found	$530
Fastest flight time	25h 59m
Direct flights	None

The best one-way flight to Vietnam from St. Louis in the past 72 hours is $530. The best round-trip flight deal from St. Louis to Vietnam found on momondo in the last 72 hours is $1,035.

The fastest flight from St. Louis to Vietnam takes 25h 59m

There are no direct flights from St. Louis to Vietnam. There are no popular flight routes from St. Louis to Vietnam.

Search flight deals

Frequently asked questions about flying from St. Louis to Vietnam

When did momondo last update prices for flights from Lambert-St Louis Airport to Vietnam?
Prices for flights from Lambert-St Louis Airport to Vietnam are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Vietnam?
As of September 2026, there are 6 operators available to choose from for flights from Lambert-St Louis Airport to Vietnam.
How old do you have to be to fly from Lambert-St Louis Airport to Vietnam?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Vietnam.
What documentation or ID do you need to fly to Vietnam?
The required travel and health documents for your Vietnam trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Vietnam. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from St. Louis to Vietnam

Compare and see reviews for airlines that fly from St. Louis to Vietnam with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $903	Free Cancellation	Rating 7.1 12,025 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $921	Free Cancellation	Rating 8.3 1,912 reviews	Search Japan Airlines flights
Cathay Pacific	PriceFrom $936	Free Cancellation	Rating 7.6 1,467 reviews	Search Cathay Pacific flights
United Airlines	PriceFrom $943	Free Cancellation	Rating 7.4 10,159 reviews	Search United Airlines flights
ANA	PriceFrom $998	Free Cancellation	Rating 8.3 1,308 reviews	Search ANA flights
Delta	PriceFrom $1,110	Free Cancellation	Rating 7.8 8,545 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Vietnam?

It is quick and easy to find St. Louis to Vietnam flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Vietnam that suits you.

Can I find flights from St. Louis to Vietnam with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Vietnam from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Vietnam?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Vietnam.

I’m not ready to book a flight from St. Louis to Vietnam right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Vietnam flights. All you need is a valid email address and we will do the rest; it is that quick and easy.