Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Vietnam from $416

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Vietnam departing on 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Vietnam

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:37 am - 10:05 am
STL
-
HAN
35h 28m
2 stops
Multiple Airlines Logo
7:30 pm - 11:58 pm
HAN
-
STL
40h 28m
2 stops
$943Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Cathay Pacific Logo
6:38 am - 6:30 pm
STL
-
HAN
47h 52m
2 stops
Cathay Pacific Logo
7:30 pm - 11:35 pm
HAN
-
STL
40h 05m
2 stops
$951Cathay Pacific
Thu, Mar 19 - Thu, Mar 26
Cathay Pacific Logo
8:03 pm - 12:20 am
STL
-
SGN
40h 17m
2 stops
Cathay Pacific Logo
11:05 am - 11:56 pm
SGN
-
STL
48h 51m
2 stops
$952Cathay Pacific
Sat, May 2 - Mon, May 18
China Airlines Logo
4:46 pm - 9:40 am
STL
-
SGN
28h 54m
2 stops
China Airlines Logo
10:50 am - 7:00 pm
SGN
-
STL
44h 10m
2 stops
$1,009China Airlines
Tue, May 12 - Tue, Jun 2
China Airlines Logo
4:46 pm - 9:40 am
STL
-
SGN
28h 54m
2 stops
China Airlines Logo
5:30 pm - 7:00 pm
SGN
-
STL
37h 30m
2 stops
$1,022China Airlines
Tue, May 12 - Tue, Jun 2
United Airlines Logo
5:15 am - 10:05 pm
STL
-
SGN
28h 50m
3 stops
United Airlines Logo
11:15 pm - 7:25 pm
SGN
-
STL
32h 10m
2 stops
$1,025United Airlines
Mon, Jul 13 - Mon, Sep 28
STARLUX Airlines Logo
7:00 am - 4:55 pm
STL
-
SGN
45h 55m
2 stops
STARLUX Airlines Logo
11:30 am - 2:02 pm
SGN
-
STL
38h 32m
2 stops
$1,026STARLUX Airlines
Wed, Apr 8 - Tue, Aug 11
United Airlines Logo
5:15 am - 10:05 pm
STL
-
SGN
28h 50m
3 stops
United Airlines Logo
7:00 am - 9:42 am
SGN
-
STL
38h 42m
3 stops
$1,036United Airlines
Mon, Jul 13 - Mon, Sep 28
Delta Logo
6:45 am - 9:05 pm
STL
-
DAD
26h 20m
2 stops
Delta Logo
10:55 pm - 12:36 am
DAD
-
STL
37h 41m
2 stops
$1,406Delta
Thu, Jul 2 - Tue, Aug 25
Delta Logo
1:30 pm - 9:05 pm
STL
-
DAD
43h 35m
2 stops
Delta Logo
10:55 pm - 12:36 am
DAD
-
STL
37h 41m
2 stops
$1,436Delta
Tue, Jul 7 - Tue, Aug 25

ANA flights from St. Louis to Vietnam

Our best ANA deals on St. Louis to Vietnam flight tickets
ANA
Jul 13
STL9:23 amLambert-St Louis
48h 32m
2 stops
SGN9:55 pmHo Chi Minh City
Sep 28
SGN11:15 pmHo Chi Minh City
29h 20m
2 stops
STL4:35 pmLambert-St Louis
$1,061
ANA
Jul 6
STL8:15 amLambert-St Louis
25h 40m
2 stops
SGN9:55 pmHo Chi Minh City
Sep 28
SGN11:15 pmHo Chi Minh City
29h 20m
2 stops
STL4:35 pmLambert-St Louis
$1,209
ANA
Jul 5
STL3:10 pmLambert-St Louis
42h 45m
2 stops
SGN9:55 pmHo Chi Minh City
Aug 5
SGN11:15 pmHo Chi Minh City
48h 56m
2 stops
STL12:11 pmLambert-St Louis
$1,330

United Airlines flights from St. Louis to Vietnam

Our best United Airlines deals on St. Louis to Vietnam flight tickets
United Airlines
Jul 13
STL5:15 amLambert-St Louis
28h 50m
3 stops
SGN10:05 pmHo Chi Minh City
Sep 28
SGN11:15 pmHo Chi Minh City
32h 10m
2 stops
STL7:25 pmLambert-St Louis
$1,025
United Airlines
Jul 13
STL5:15 amLambert-St Louis
28h 50m
3 stops
SGN10:05 pmHo Chi Minh City
Sep 28
SGN7:00 amHo Chi Minh City
38h 42m
3 stops
STL9:42 amLambert-St Louis
$1,036
United Airlines
Jul 9
STL5:15 amLambert-St Louis
28h 50m
3 stops
SGN10:05 pmHo Chi Minh City
Sep 27
SGN11:15 pmHo Chi Minh City
29h 20m
2 stops
STL4:35 pmLambert-St Louis
$1,050

momondo 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, momondo users made 832,500 searches. Data last updated February 3, 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

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/4

9:37 am-10:05 am

2 stops35h 28m

Hanoi Noibai

Wed 3/11

7:30 pm-11:58 pm

2 stops40h 28m

$943

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 3/19

6:38 am-6:30 pm

2 stops47h 52m

Hanoi Noibai

Thu 3/26

7:30 pm-11:35 pm

2 stops40h 05m

$951

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Sat 5/2

8:03 pm-12:20 am

2 stops40h 17m

Ho Chi Minh City

Mon 5/18

11:05 am-11:56 pm

2 stops48h 51m

$952

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 5/12

4:46 pm-9:40 am

2 stops28h 54m

Ho Chi Minh City

Tue 6/2

10:50 am-7:00 pm

2 stops44h 10m

$1,009

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Tue 5/12

4:46 pm-9:40 am

2 stops28h 54m

Ho Chi Minh City

Tue 6/2

5:30 pm-7:00 pm

2 stops37h 30m

$1,022

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 7/13

5:15 am-10:05 pm

3 stops28h 50m

Ho Chi Minh City

Mon 9/28

11:15 pm-7:25 pm

2 stops32h 10m

$1,025

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Wed 4/8

7:00 am-4:55 pm

2 stops45h 55m

Ho Chi Minh City

Tue 8/11

11:30 am-2:02 pm

2 stops38h 32m

$1,026

St. LouisHo Chi Minh City

STL - SGN

STLSGN

Lambert-St Louis

Mon 7/13

5:15 am-10:05 pm

3 stops28h 50m

Ho Chi Minh City

Mon 9/28

7:00 am-9:42 am

3 stops38h 42m

$1,036

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Thu 7/2

6:45 am-9:05 pm

2 stops26h 20m

Da Nang

Tue 8/25

10:55 pm-12:36 am

2 stops37h 41m

$1,406

St. LouisDa Nang

STL - DAD

STLDAD

Lambert-St Louis

Tue 7/7

1:30 pm-9:05 pm

2 stops43h 35m

Da Nang

Tue 8/25

10:55 pm-12:36 am

2 stops37h 41m

$1,436

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Vietnam from

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

What is the cheapest month to fly to Vietnam?

The month of November is, on average, the cheapest month to fly to Vietnam from St. Louis, with most prices found around $986. If you don’t want to visit Vietnam in November, then you should wait until September to fly from St. Louis, when ticket prices are also cheap, with an average price of $1,005.

How far in advance should I book a flight 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 $1,210 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 $955 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

Fastest flight time

25h 30m

Direct flights

None
The fastest flight from St. Louis to Vietnam takes 25h 30m
There are no direct flights from St. Louis to Vietnam. There are no popular flight routes from St. Louis to Vietnam.
Search flight deals

  • 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?

  • 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
China AirlinesPriceFrom $903Free CancellationRating
8.3
803 reviews
Search China Airlines flights
Cathay PacificPriceFrom $915Free CancellationRating
7.6
1,159 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $923Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
Japan AirlinesPriceFrom $946Free CancellationRating
8.3
1,697 reviews
Search Japan Airlines flights
DeltaPriceFrom $960Free CancellationRating
7.9
8,139 reviews
Search Delta flights
American AirlinesPriceFrom $966Free CancellationRating
7.2
11,217 reviews
Search American Airlines flights
ANAPriceFrom $985Free CancellationRating
8.4
1,084 reviews
Search ANA flights
EVA AirPriceFrom $1,008Free CancellationRating
8.4
1,344 reviews
Search EVA Air 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.

An easier way to manage your Vietnam trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/5
Thu 3/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Vietnam

Popular cities in Vietnam

Popular flights according to clicks in the last 7 days on momondo
Flights to Ho Chi Minh Cityfrom $484
Flights to Hanoifrom $509
Flights to Da Nangfrom $504
Flights to Phu Quocfrom $614
Flights to Nha Trangfrom $753
Flights to Dalatfrom $1,165
Flights to Huefrom $952
Flights to Con Daofrom $1,430
Flights to Haiphongfrom $1,183
Flights to Qui Nhon
Flights to Vinh City
Flights to Buon Ma Thuot