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$1,068+ Cheap flights from St. Louis (STL) to Hanoi (HAN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
May 5 — May 121
Tue 5/5
Tue 5/12
1 adult, Economy
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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 April 5, 2026.

This oojo deal was found by Cheapflights users on 3/31. 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.
Sun 9/277:34 pm
STL
-
HAN
2 stops33h 16m
China Airlines
Sun 10/1811:35 am
HAN
-
STL
2 stops48h 24m
China Airlines
Deal found 3/31$1,068
This oojo deal was found by Cheapflights users on 3/31. 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.
Thu 10/86:41 am
STL
-
HAN
2 stops39h 54m
China Airlines
Sun 10/185:50 pm
HAN
-
STL
2 stops42h 09m
China Airlines
Deal found 3/31$1,116
This China Airlines deal was found by Cheapflights users on 4/4. 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 8/167:56 pm
STL
-
HAN
2 stops26h 34m
Multiple Airlines
Sun 9/611:30 am
HAN
-
STL
2 stops23h 30m
Multiple Airlines
Deal found 4/4$1,132
This United Airlines deal was found by Cheapflights users on 3/31. 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
3 stops52h 03m
United Airlines
Deal found 3/31$1,213
This United Airlines deal was found by Cheapflights users on 3/31. 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 9/136:14 am
STL
-
HAN
2 stops28h 01m
United Airlines
Tue 9/1511:35 pm
HAN
-
STL
2 stops33h 47m
United Airlines
Deal found 3/31$1,237
This United Airlines deal was found by Cheapflights users on 3/31. 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 7/137:23 pm
STL
-
HAN
2 stops38h 52m
United Airlines
Sun 7/1911:35 pm
HAN
-
STL
2 stops48h 36m
United Airlines
Deal found 3/31$1,288
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Sat 7/117:23 pm
STL
-
HAN
2 stops38h 52m
United Airlines
Sun 7/1911:35 pm
HAN
-
STL
2 stops48h 36m
United Airlines
Deal found 3/31$1,331

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 April 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,068
(oojo)
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

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 April 5, 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
Quickest round-trip

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 8/16

7:56 pm-10:30 am

2 stops26h 34m

Hanoi Noibai

Sun 9/6

11:30 am-11:00 pm

2 stops23h 30m

$1,132

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 9/13

6:14 am-10:15 pm

2 stops28h 01m

Hanoi Noibai

Tue 9/15

11:35 pm-9:22 pm

2 stops33h 47m

$1,237

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 9/27

5:20 am-10:15 pm

2 stops28h 55m

Hanoi Noibai

Sun 10/18

11:35 pm-3:38 pm

3 stops52h 03m

$1,354

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 7/11

7:03 pm-9:35 pm

2 stops38h 32m

Hanoi Noibai

Tue 7/21

11:10 pm-12:37 am

2 stops37h 27m

$1,520

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Thu 7/16

7:23 pm-10:15 pm

2 stops38h 52m

Hanoi Noibai

Tue 7/21

11:35 pm-3:46 pm

3 stops52h 11m

$1,721

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 7/18

7:23 pm-10:15 pm

2 stops38h 52m

Hanoi Noibai

Sun 7/26

11:35 pm-3:46 pm

3 stops52h 11m

$1,721

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 6/2

7:41 pm-1:15 pm

2 stops53h 34m

Hanoi Noibai

Wed 6/10

1:30 am-11:59 pm

2 stops34h 29m

$1,780

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 7/18

8:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

Mon 7/20

11:10 pm-12:37 am

2 stops37h 27m

$1,864

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 5/3

3:35 pm-4:50 pm

3 stops37h 15m

Hanoi Noibai

Sun 5/10

11:30 am-1:15 am

2 stops25h 45m

$1,906

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Sorted by cheapest first

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 April.
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 01m. United Airlines provides one of the quickest options available for as low as $1,237. The distance between St. Louis and Hanoi is about 8157 mi.

  • 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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