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

United Airlines and Japan Airlines are the most popular carriers operating from Lambert-St Louis to Hanoi Noibai

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

Prices for flights from Lambert-St Louis Airport to Hanoi Noibai Airport refresh daily.

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

There is 1 operator available for flights from Lambert-St Louis Airport to Hanoi Noibai Airport as of September 2025.

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

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 Hanoi Noibai Airport.

What documentation or ID do you need to fly to Hanoi Noibai Airport?

The necessary travel and health documents for your Hanoi Noibai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$531 Cheap Flights from St. Louis to Hanoi in 2025

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Find the cheapest flights from St. Louis to Hanoi

Round-trip

One-way

Last minute

Cheap round-trip flights

3:59 pm - 9:55 amSTL-HAN

29h 56m2 stops

7:25 pm - 11:42 pmHAN-STL

41h 17m2 stops

$953Cathay Pacific

Find Deal

Tue, Sep 23 - Tue, Nov 11

6:00 am - 9:35 pmSTL-HAN

27h 35m2 stops

11:10 pm - 11:24 pmHAN-STL

36h 14m2 stops

$998Delta

Find Deal

Sat, Sep 20 - Wed, Sep 24

11:30 am - 10:15 pmSTL-HAN

46h 45m2 stops

11:35 pm - 10:00 pmHAN-STL

34h 25m3 stops

$1,016United Airlines

Find Deal

Sat, Sep 20 - Wed, Sep 24

6:39 am - 9:55 amSTL-HAN

39h 16m2 stops

11:05 am - 11:56 pmHAN-STL

49h 51m2 stops

$1,039Cathay Pacific

Find Deal

Fri, Oct 17 - Fri, Nov 7

3:57 pm - 10:25 amSTL-HAN

30h 28m2 stops

11:30 am - 11:59 pmHAN-STL

25h 29m2 stops

$1,086

Find Deal

Fri, Oct 17 - Fri, Nov 7

9:00 am - 10:15 pmSTL-HAN

25h 15m2 stops

12:25 am - 2:25 pmHAN-STL

51h 00m2 stops

$1,099United Airlines

Find Deal

Tue, Sep 23 - Mon, Nov 10

2:17 pm - 10:30 pmSTL-HAN

43h 13m2 stops

11:55 pm - 11:42 pmHAN-STL

36h 47m2 stops

$1,198Japan Airlines

Find Deal

Wed, Nov 26 - Sun, Nov 30

7:23 am - 7:15 amSTL-HAN

35h 52m2 stops

8:45 am - 8:32 pmHAN-STL

47h 47m2 stops

$1,324Qatar Airways

Find Deal

Fri, Sep 19 - Fri, Sep 26

8:05 pm - 7:15 amSTL-HAN

47h 10m2 stops

3:00 am - 7:30 pmHAN-STL

29h 30m2 stops

$1,392Qatar Airways

Find Deal

Fri, Oct 17 - Thu, Nov 6

6:30 am - 11:05 pmSTL-HAN

27h 35m2 stops

12:25 am - 9:54 pmHAN-STL

34h 29m3 stops

$1,702

Find Deal

Wed, Nov 26 - Sat, Nov 29

Qatar Airways flights from St. Louis to Hanoi

Our best Qatar Airways deals on St. Louis to Hanoi flight tickets

Qatar Airways

Sep 19

STL7:23 amLambert-St Louis

35h 52m

2 stops

HAN7:15 amHanoi Noibai

Sep 26

HAN8:45 amHanoi Noibai

47h 47m

2 stops

STL8:32 pmLambert-St Louis

$1,324

Find similar

Qatar Airways

Oct 17

STL8:05 pmLambert-St Louis

47h 10m

2 stops

HAN7:15 amHanoi Noibai

Nov 6

HAN3:00 amHanoi Noibai

29h 30m

2 stops

STL7:30 pmLambert-St Louis

$1,392

Find similar

United Airlines flights from St. Louis to Hanoi

Our best United Airlines deals on St. Louis to Hanoi flight tickets

United Airlines

Sep 20

STL11:30 amLambert-St Louis

46h 45m

2 stops

HAN10:15 pmHanoi Noibai

Sep 24

HAN11:35 pmHanoi Noibai

34h 25m

3 stops

STL10:00 pmLambert-St Louis

$1,016

Find similar

United Airlines

Sep 23

STL9:00 amLambert-St Louis

25h 15m

2 stops

HAN10:15 pmHanoi Noibai

Nov 10

HAN12:25 amHanoi Noibai

51h 00m

2 stops

STL2:25 pmLambert-St Louis

$1,099

Find similar

United Airlines

Sep 20

STL3:20 pmLambert-St Louis

42h 55m

2 stops

HAN10:15 pmHanoi Noibai

Sep 24

HAN11:35 pmHanoi Noibai

34h 25m

3 stops

STL10:00 pmLambert-St Louis

$1,101

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 9/23

3:59 pm-9:55 am

2 stops29h 56m

Hanoi Noibai

Tue 11/11

7:25 pm-11:42 pm

2 stops41h 17m

$953

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 9/20

6:00 am-9:35 pm

2 stops27h 35m

Hanoi Noibai

Wed 9/24

11:10 pm-11:24 pm

2 stops36h 14m

$998

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 9/20

11:30 am-10:15 pm

2 stops46h 45m

Hanoi Noibai

Wed 9/24

11:35 pm-10:00 pm

3 stops34h 25m

$1,016

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 10/17

6:39 am-9:55 am

2 stops39h 16m

Hanoi Noibai

Fri 11/7

11:05 am-11:56 pm

2 stops49h 51m

$1,039

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 10/17

3:57 pm-10:25 am

2 stops30h 28m

Hanoi Noibai

Fri 11/7

11:30 am-11:59 pm

2 stops25h 29m

$1,086

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 9/23

9:00 am-10:15 pm

2 stops25h 15m

Hanoi Noibai

Mon 11/10

12:25 am-2:25 pm

2 stops51h 00m

$1,099

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 11/26

2:17 pm-10:30 pm

2 stops43h 13m

Hanoi Noibai

Sun 11/30

11:55 pm-11:42 pm

2 stops36h 47m

$1,198

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 9/19

7:23 am-7:15 am

2 stops35h 52m

Hanoi Noibai

Fri 9/26

8:45 am-8:32 pm

2 stops47h 47m

$1,324

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 10/17

8:05 pm-7:15 am

2 stops47h 10m

Hanoi Noibai

Thu 11/6

3:00 am-7:30 pm

2 stops29h 30m

$1,392

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 11/26

6:30 am-11:05 pm

2 stops27h 35m

Hanoi Noibai

Sat 11/29

12:25 am-9:54 pm

3 stops34h 29m

$1,702

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 Hanoi

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 day to depart on your flight to Hanoi?

According to our data, Sunday is the cheapest day to fly to Hanoi from St. Louis. The lowest ticket price found for a Sunday departure recently was $1,292. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Hanoi on Monday is $2,429.

What is the cheapest time of day to depart on your flight to Hanoi?

Our most recent data shows that the best time of day to fly to Hanoi is at noon. Flights from St. Louis to Hanoi during this time can be as low as $1,510. Try not to purchase tickets in the morning because they tend to be around $2,340. Of course, these prices can vary depending on the time of year and what airport you fly to.

When to book flights from St. Louis to Hanoi

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Hanoi according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Hanoi (STL to HAN) flight deals and tips

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

Direct flights	None

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

Search flight deals

How far is Lambert-St Louis to Hanoi Noibai by plane?
There are 8181.5 mi between Lambert-St Louis and Hanoi Noibai. By plane, this route typically takes 24h 58m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Hanoi Noibai Airport?
Prices for flights from Lambert-St Louis Airport to Hanoi Noibai Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Hanoi Noibai Airport?
There is 1 operator available for flights from Lambert-St Louis Airport to Hanoi Noibai Airport as of September 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Hanoi Noibai Airport?
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 Hanoi Noibai Airport.
What documentation or ID do you need to fly to Hanoi Noibai Airport?
The necessary travel and health documents for your Hanoi Noibai Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Hanoi?
Based on momondo bookings for flights between St. Louis and Hanoi, the leading airline is Delta, making up 100% of the total bookings.

Best airlines flying from St. Louis to Hanoi

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $920	Free Cancellation	Rating 7.9 7,972 reviews		Search Delta flights

Why use momondo?

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

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

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

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

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 Hanoi.

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

Yes. momondo can track prices for St. Louis to Hanoi flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.