HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Hanoi

$436+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Hanoi with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 14, 2026.

This oojo deal was found by Cheapflights users on 2/11. 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 9/94:14 pm
STL
-
HAN
2 stops29h 41m
Cathay Pacific
Wed 9/237:10 pm
HAN
-
STL
2 stops36h 53m
Cathay Pacific
Deal found 2/11$901
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Wed 9/306:01 am
STL
-
HAN
2 stops28h 14m
United Airlines
Sun 10/411:35 pm
HAN
-
STL
2 stops34h 31m
United Airlines
Deal found 2/13$998
This oojo deal was found by Cheapflights users on 2/14. 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.
Tue 3/313:50 pm
STL
-
HAN
2 stops37h 00m
EVA Air
Tue 4/712:05 pm
HAN
-
STL
2 stops47h 54m
EVA Air
Deal found 2/14$1,017
This Cathay Pacific deal was found by Cheapflights users on 2/14. 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 10/1612:07 pm
STL
-
HAN
2 stops33h 48m
Multiple Airlines
Sat 10/2410:55 am
HAN
-
STL
2 stops23h 33m
Multiple Airlines
Deal found 2/14$1,034
This United Airlines deal was found by Cheapflights users on 2/12. 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 9/2711:00 am
STL
-
HAN
2 stops47h 15m
United Airlines
Thu 10/111:35 pm
HAN
-
STL
2 stops31h 03m
United Airlines
Deal found 2/12$1,045
This oojo deal was found by Cheapflights users on 2/11. 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 6/175:18 pm
STL
-
HAN
2 stops28h 37m
Cathay Pacific
Sun 6/217:10 pm
HAN
-
STL
2 stops40h 49m
Cathay Pacific
Deal found 2/11$1,142
This Ovago deal was found by Cheapflights users on 2/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/236:50 pm
STL
-
HAN
2 stops27h 15m
Cathay Pacific
Mon 3/3011:00 am
HAN
-
STL
2 stops23h 58m
Cathay Pacific
Deal found 2/13$1,175
This EVA Air deal was found by Cheapflights users on 2/11. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:32 pm
STL
-
HAN
2 stops27h 33m
Multiple Airlines
Wed 9/236:00 pm
HAN
-
STL
3 stops33h 21m
Multiple Airlines
Deal found 2/11$1,190
This EVA Air deal was found by Cheapflights users on 2/14. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:50 pm
STL
-
HAN
2 stops31h 15m
Multiple Airlines
Tue 4/76:00 pm
HAN
-
STL
3 stops32h 50m
Multiple Airlines
Deal found 2/14$1,270
This KAYAK deal was found by Cheapflights users on 2/13. 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.
Wed 3/116:38 am
STL
-
HAN
2 stops39h 27m
Cathay Pacific
Sat 3/2111:05 am
HAN
-
STL
2 stops23h 53m
Cathay Pacific
Deal found 2/13$1,549

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 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,142
(oojo)

One-way from

$485
(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
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 14, 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

Tue 3/31

3:50 pm-4:50 pm

2 stops37h 00m

Hanoi Noibai

Tue 4/7

12:05 pm-11:59 pm

2 stops47h 54m

$1,017

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 6/17

5:18 pm-9:55 am

2 stops28h 37m

Hanoi Noibai

Sun 6/21

7:10 pm-11:59 pm

2 stops40h 49m

$1,142

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 3/23

6:50 pm-10:05 am

2 stops27h 15m

Hanoi Noibai

Mon 3/30

11:00 am-10:58 pm

2 stops23h 58m

$1,175

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 3/31

3:50 pm-11:05 am

2 stops31h 15m

Hanoi Noibai

Tue 4/7

6:00 pm-2:50 pm

3 stops32h 50m

$1,270

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

$1,549

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-9:11 pm

2 stops37h 41m

$1,558

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 6/17

7:06 pm-10:15 pm

2 stops39h 09m

Hanoi Noibai

Sun 6/21

11:35 pm-3:46 pm

3 stops52h 11m

$1,615

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 3/23

5:35 pm-11:35 am

3 stops30h 00m

Hanoi Noibai

Mon 3/30

6:00 pm-6:00 pm

2 stops36h 00m

$1,840

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

6:00 am-11:05 pm

2 stops29h 05m

Hanoi Noibai

Tue 3/17

12:25 am-10:25 pm

2 stops34h 00m

$2,958

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 6/17

1:00 pm-10:00 pm

2 stops45h 00m

Hanoi Noibai

Sun 6/21

11:35 pm-12:21 pm

2 stops48h 46m

$4,790

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/14

Showing 1-10 of 13 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 28h 37m. EVA Air provides one of the quickest options available for as low as $1,142. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.