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Hanoi

$455+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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2. Select your favorite providers

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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 February 3, 2026.

This Cathay Pacific deal was found by Cheapflights users on 2/2. 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.
Wed 3/49:37 am
STL
-
HAN
2 stops35h 28m
Multiple Airlines
Wed 3/117:30 pm
HAN
-
STL
2 stops40h 28m
Multiple Airlines
Deal found 2/2$943
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/196:38 am
STL
-
HAN
2 stops47h 52m
Cathay Pacific
Thu 3/267:30 pm
HAN
-
STL
2 stops40h 05m
Cathay Pacific
Deal found 2/2$951
This United Airlines deal was found by Cheapflights users on 1/31. 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 9/276:49 pm
STL
-
HAN
2 stops39h 26m
United Airlines
Thu 10/111:35 pm
HAN
-
STL
2 stops31h 03m
United Airlines
Deal found 1/31$994
This oojo deal was found by Cheapflights users on 2/3. 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.
Sat 4/118:00 am
STL
-
HAN
2 stops37h 50m
Cathay Pacific
Sat 4/257:10 pm
HAN
-
STL
2 stops39h 49m
Cathay Pacific
Deal found 2/3$1,001
This Cathay Pacific deal was found by Cheapflights users on 2/2. 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.
Sun 9/276:30 am
STL
-
HAN
2 stops47h 40m
Cathay Pacific
Thu 10/17:10 pm
HAN
-
STL
2 stops34h 52m
Cathay Pacific
Deal found 2/2$1,031
This Cathay Pacific deal was found by Cheapflights users on 2/3. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:38 am
STL
-
HAN
2 stops39h 27m
Multiple Airlines
Sat 3/217:30 pm
HAN
-
STL
2 stops40h 14m
Multiple Airlines
Deal found 2/3$1,059
This oojo deal was found by Cheapflights users on 2/1. 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.
Sat 3/212:25 pm
STL
-
HAN
2 stops64h 05m
Cathay Pacific
Mon 3/3011:00 am
HAN
-
STL
2 stops42h 58m
Cathay Pacific
Deal found 2/1$1,071
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:36 am
STL
-
HAN
2 stops39h 14m
Cathay Pacific
Sun 7/510:55 am
HAN
-
STL
2 stops24h 49m
Cathay Pacific
Deal found 2/2$1,317
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:00 am
STL
-
HAN
2 stops45h 25m
Multiple Airlines
Sun 3/18:55 am
HAN
-
STL
2 stops51h 53m
Multiple Airlines
Deal found 2/2$1,377
This China Airlines deal was found by Cheapflights users on 2/3. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:00 am
STL
-
HAN
2 stops45h 50m
Multiple Airlines
Sat 4/255:50 pm
HAN
-
STL
3 stops33h 00m
Multiple Airlines
Deal found 2/3$1,417

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$943
(Cathay Pacific)

One-way from

$455
(Gurufare)
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 February 3, 2026.
Use the filters below to find and compare flights from St. Louis to Hanoi that are best for you.

Fly from

St. Louis

Fly to

Hanoi

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. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 4/11

8:00 am-9:50 am

2 stops37h 50m

Hanoi Noibai

Sat 4/25

7:10 pm-10:59 pm

2 stops39h 49m

$1,001

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

6:38 am-10:05 am

2 stops39h 27m

Hanoi Noibai

Sat 3/21

7:30 pm-11:44 pm

2 stops40h 14m

$1,059

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 3/21

11:46 am-6:30 pm

2 stops42h 44m

Hanoi Noibai

Mon 3/30

7:10 pm-11:58 pm

2 stops40h 48m

$1,059

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 3/21

2:25 pm-6:30 pm

2 stops64h 05m

Hanoi Noibai

Mon 3/30

11:00 am-5:58 pm

2 stops42h 58m

$1,071

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 6/27

6:36 am-9:50 am

2 stops39h 14m

Hanoi Noibai

Sun 7/5

10:55 am-11:44 pm

2 stops24h 49m

$1,317

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 2/23

7:00 am-5:25 pm

2 stops45h 25m

Hanoi Noibai

Sun 3/1

8:55 am-11:48 pm

2 stops51h 53m

$1,377

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 4/11

7:00 am-4:50 pm

2 stops45h 50m

Hanoi Noibai

Sat 4/25

5:50 pm-2:50 pm

3 stops33h 00m

$1,417

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

6:38 am-10:05 am

2 stops39h 27m

Hanoi Noibai

Sat 3/21

11:05 am-10:58 pm

2 stops23h 53m

$1,471

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 14 results
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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 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 47h 52m. Cathay Pacific provides one of the quickest options available for as low as $951. 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.

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