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Hanoi

$469+ Cheap flights from St. Louis (STL) to Hanoi (HAN)

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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
Apr 6 — Apr 131
Mon 4/6
Mon 4/13
1 adult, Economy
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2. Select your favorite providers

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3. Compare prices and book

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Cheap flight deals from St. Louis to Hanoi

Cheapest flights from St. Louis to Hanoi
Explore the most affordable flight options available from St. Louis to Hanoi. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 7, 2026.

This oojo deal was found by Cheapflights users on 3/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:03 pm
STL
-
HAN
2 stops49h 52m
Cathay Pacific
Sun 5/107:10 pm
HAN
-
STL
2 stops39h 49m
Cathay Pacific
Deal found 3/6$914
This oojo deal was found by Cheapflights users on 3/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:30 am
STL
-
HAN
2 stops47h 40m
Cathay Pacific
Mon 9/711:00 am
HAN
-
STL
2 stops44h 14m
Cathay Pacific
Deal found 3/3$917
This KAYAK deal was found by Cheapflights users on 3/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:30 am
STL
-
HAN
2 stops39h 25m
Cathay Pacific
Mon 9/77:10 pm
HAN
-
STL
2 stops36h 04m
Cathay Pacific
Deal found 3/2$948
This oojo deal was found by Cheapflights users on 3/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:05 am
STL
-
HAN
2 stops38h 50m
Cathay Pacific
Fri 5/87:10 pm
HAN
-
STL
2 stops39h 49m
Cathay Pacific
Deal found 3/6$958
This United Airlines deal was found by Cheapflights users on 3/2. 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 10/86:01 am
STL
-
HAN
2 stops28h 14m
United Airlines
Sun 10/1811:35 pm
HAN
-
STL
2 stops50h 43m
United Airlines
Deal found 3/2$982
This Cathay Pacific deal was found by Cheapflights users on 3/2. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:04 pm
STL
-
HAN
2 stops36h 06m
Multiple Airlines
Sun 10/1810:55 am
HAN
-
STL
2 stops45h 13m
Multiple Airlines
Deal found 3/2$983
This United Airlines deal was found by Cheapflights users on 3/2. 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 9/278:15 pm
STL
-
HAN
2 stops38h 00m
United Airlines
Thu 10/111:35 pm
HAN
-
STL
2 stops33h 24m
United Airlines
Deal found 3/2$1,032
This United Airlines deal was found by Cheapflights users on 3/2. 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 8/166:00 am
STL
-
HAN
2 stops28h 15m
United Airlines
Mon 9/711:35 pm
HAN
-
STL
2 stops30h 49m
United Airlines
Deal found 3/2$1,038
This China Airlines deal was found by Cheapflights users on 3/5. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:35 pm
STL
-
HAN
2 stops33h 15m
Multiple Airlines
Sun 4/2611:30 am
HAN
-
STL
2 stops25h 45m
Multiple Airlines
Deal found 3/5$1,057
This United Airlines deal was found by Cheapflights users on 3/6. 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 9/284:17 pm
STL
-
HAN
3 stops41h 58m
United Airlines
Thu 10/111:35 pm
HAN
-
STL
2 stops28h 51m
United Airlines
Deal found 3/6$1,076
This China Airlines deal was found by Cheapflights users on 3/2. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:25 am
STL
-
HAN
3 stops40h 05m
Multiple Airlines
Mon 9/75:50 pm
HAN
-
STL
2 stops32h 36m
Multiple Airlines
Deal found 3/2$1,078

Find flight deals from St. Louis to Hanoi

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Hanoi (HAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$914
(oojo)

One-way from

$469
(Kiwi.com)
Provider with most accurate pricing for Lambert-St Louis-Hanoi Noibai flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Hanoi Noibai flights.
Search Deals
From Lambert-St Louis to Hanoi Noibai
Search Deals
One-way flight from Lambert-St Louis to Hanoi Noibai
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Hanoi 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 March 7, 2026.
Use the filters below to find and compare flights from St. Louis to Hanoi that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 8/17

6:30 am-9:55 am

2 stops39h 25m

Hanoi Noibai

Mon 9/7

11:00 am-8:19 pm

2 stops45h 19m

$917

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 8/16

6:00 am-10:15 pm

2 stops28h 15m

Hanoi Noibai

Mon 9/7

11:35 pm-6:24 pm

2 stops30h 49m

$1,038
Quickest round-trip

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 4/19

7:35 pm-4:50 pm

2 stops33h 15m

Hanoi Noibai

Sun 4/26

11:30 am-1:15 am

2 stops25h 45m

$1,057

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 8/17

6:25 am-10:30 am

3 stops40h 05m

Hanoi Noibai

Mon 9/7

5:50 pm-2:26 pm

2 stops32h 36m

$1,078

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 4/17

7:00 am-9:35 pm

2 stops26h 35m

Hanoi Noibai

Thu 4/30

11:10 pm-12:25 am

2 stops37h 15m

$1,116

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 4/18

3:00 pm-4:50 pm

2 stops37h 50m

Hanoi Noibai

Sat 4/25

5:50 pm-1:15 am

2 stops43h 25m

$1,191

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Fri 4/17

3:50 pm-10:30 am

3 stops30h 40m

Hanoi Noibai

Thu 4/30

5:50 pm-9:05 pm

2 stops39h 15m

$1,599
Cheapest one-way

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 4/23

9:55 pm-12:15 pm

3 stops50h 20m

$469
Quickest one-way

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 4/23

6:11 pm-9:55 am

2 stops27h 44m

$476

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/7

9:34 am-6:10 pm

2 stops44h 36m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Hanoi

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Hanoi in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Hanoi flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Hanoi flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Hanoi flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Hanoi flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Hanoi flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Hanoi

Have a flexible travel schedule? Discover the best time to fly to Hanoi 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Hanoi. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Hanoi?

    A quick flight from St. Louis to Hanoi can take about 28h 15m. Cathay Pacific provides one of the quickest options available for as low as $1,038. The distance between St. Louis and Hanoi is about 8157 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Yes. In addition to deals on St. Louis to Hanoi flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Hanoi.

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

    Yes. Cheapflights offers flight deals from St. Louis to Hanoi by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for St. Louis to Hanoi

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