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$499+ 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
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from St. Louis to Hanoi

Best flights from St. Louis to Hanoi
Discover carefully curated flight deals from St. Louis to Hanoi that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This oojo deal was found by Cheapflights users on 12/18. 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 4/156:30 amSTL - HAN
2 stops39h 25mCathay Pacific
Wed 4/297:05 pmHAN - STL
2 stops40h 11mCathay Pacific
Deal found 12/18$924
This Cathay Pacific deal was found by Cheapflights users on 12/16. 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 3/49:59 amSTL - HAN
2 stops35h 06mMultiple Airlines
Tue 3/2410:30 amHAN - STL
2 stops43h 33mMultiple Airlines
Deal found 12/16$957
This oojo deal was found by Cheapflights users on 12/17. 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 3/117:00 amSTL - HAN
2 stops40h 35mEVA Air
Sat 3/2112:35 pmHAN - STL
2 stops47h 20mEVA Air
Deal found 12/17$1,180
This China Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 3/118:25 amSTL - HAN
3 stops37h 55mMultiple Airlines
Sat 3/215:30 pmHAN - STL
2 stops44h 00mMultiple Airlines
Deal found 12/16$1,056
This Cathay Pacific deal was found by Cheapflights users on 12/16. 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 1/187:04 amSTL - HAN
2 stops38h 01mCathay Pacific
Thu 1/2211:05 amHAN - STL
2 stops44h 09mCathay Pacific
Deal found 12/16$1,096

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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$957
(Cathay Pacific)

One-way from

$499
(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 December 18, 2025.
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 4/15

6:30 am-9:55 am

2 stops39h 25m

Hanoi Noibai

Wed 4/29

7:05 pm-11:16 pm

2 stops40h 11m

$924

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/4

9:59 am-10:05 am

2 stops35h 06m

Hanoi Noibai

Tue 3/24

10:30 am-6:03 pm

2 stops43h 33m

$957

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

8:25 am-10:20 am

3 stops37h 55m

Hanoi Noibai

Sat 3/21

5:30 pm-1:30 am

2 stops44h 00m

$1,056

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sun 1/18

7:04 am-10:05 am

2 stops38h 01m

Hanoi Noibai

Thu 1/22

11:05 am-6:14 pm

2 stops44h 09m

$1,096

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 3/11

7:00 am-11:35 am

2 stops40h 35m

Hanoi Noibai

Sat 3/21

12:35 pm-11:55 pm

2 stops47h 20m

$1,180

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 3/3

7:00 am-10:30 pm

2 stops26h 30m

$499

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 1/14

7:04 am-10:05 am

2 stops38h 01m

$501

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 12/31

3:30 pm-10:05 am

2 stops29h 35m

$866

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 12/27

6:29 am-9:45 pm

2 stops26h 16m

$947

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 12/31

6:30 am-12:00 pm

3 stops40h 30m

$3,064

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 12 results
1
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Hanoi flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Hanoi

What is the cheapest time of day to fly from STL to HAN?

Find hourly flight availability from St. Louis to Hanoi. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s optimal to fly from St. Louis to Hanoi at noon. By choosing this option you can save up to 54% on the cost of your flight, compared to a flight in the evening.

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 39h 25m. Cathay Pacific provides one of the quickest options available for as low as $924. 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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