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$1,039+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HAN
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
1 adult, Economy
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Cheap 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 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,048
(United Airlines)

One-way from

$1,039
(Korean Air)

Popular in

July

Cheapest in

January

Average price

$1,254
Provider with most accurate pricing for Lambert-St Louis-Hanoi Noibai flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Hanoi Noibai flights.
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From Lambert-St Louis to Hanoi Noibai
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One-way flight from Lambert-St Louis to Hanoi Noibai
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Highest demand for flights based on searches. 24% potential increase in price ($532 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($98 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 3, 2025.

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.
Wed 8/205:30 amSTL - HAN
2 stops28h 45mUnited Airlines
Thu 9/411:35 pmHAN - STL
2 stops36h 52mUnited Airlines
Deal found 3/2$1,048
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/208:00 amSTL - HAN
2 stops26h 15mMultiple Airlines
Wed 9/312:40 amHAN - STL
2 stops51h 55mMultiple Airlines
Deal found 3/2$1,236
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.
Tue 4/82:19 pmSTL - HAN
2 stops28h 56mQatar Airways
Tue 4/298:45 amHAN - STL
2 stops59h 57mQatar Airways
Deal found 3/3$1,331
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/812:00 pmSTL - HAN
2 stops33h 55mCathay Pacific
Tue 4/2910:55 amHAN - STL
2 stops23h 33mCathay Pacific
Deal found 3/2$1,338
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:30 amSTL - HAN
2 stops39h 10mDelta
Fri 8/2211:10 pmHAN - STL
2 stops37h 28mDelta
Deal found 3/3$1,521
This Booking.com deal was found by Cheapflights users on 3/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/119:15 amSTL - HAN
2 stops24h 45mAir Canada
Fri 8/2211:35 pmHAN - STL
3 stops35h 43mAir Canada
Deal found 3/1$2,299

Find flights from St. Louis to Hanoi within your budget

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 3, 2025.

Fly from

St. Louis

Fly to

Hanoi

Route

Depart

Return

Price

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 8/20

5:30 am-10:15 pm

2 stops28h 45m

Hanoi Noibai

Thu 9/4

11:35 pm-12:27 am

2 stops36h 52m

$1,048

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Wed 8/20

8:00 am-10:15 pm

2 stops26h 15m

Hanoi Noibai

Wed 9/3

12:40 am-4:35 pm

2 stops51h 55m

$1,236

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/8

2:19 pm-7:15 am

2 stops28h 56m

Hanoi Noibai

Tue 4/29

8:45 am-8:42 am

2 stops59h 57m

$1,331

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Tue 4/8

12:00 pm-9:55 am

2 stops33h 55m

Hanoi Noibai

Tue 4/29

10:55 am-10:28 pm

2 stops23h 33m

$1,338

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 8/11

7:30 am-10:40 am

2 stops39h 10m

Hanoi Noibai

Fri 8/22

11:10 pm-12:38 am

2 stops37h 28m

$1,521

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Mon 8/11

9:15 am-10:00 pm

2 stops24h 45m

Hanoi Noibai

Fri 8/22

11:35 pm-11:18 pm

3 stops35h 43m

$2,299

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 5/31

5:00 pm-9:35 pm

2 stops40h 35m

$1,039

St. LouisHanoi

STL - HAN

STLHAN

Lambert-St Louis

Sat 5/31

1:30 pm-10:15 pm

2 stops44h 45m

$1,199

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

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
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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.

Travel insights for flights from St. Louis to Hanoi

Get recent, data-driven insights about flights from St. Louis to Hanoi including ideal travel times, pricing trends, and more.

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 March 3, 2025.

It’s optimal to fly from St. Louis to Hanoi at noon. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight in the morning.

Rainfall in Hanoi by month

Plan your trip to Hanoi by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Hanoi ranges from 0.6 - 11.7 inches per month. August is typically the wettest month, when rainfall can reach 11.7 in. December is typically the driest time to visit Hanoi when rainfall is around 0.6 in.

Temperature in Hanoi by month

Plan your trip to Hanoi by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Hanoi, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 62.6 F).

Reviews of airlines servicing Hanoi

Get insights into the airlines that provide service to Hanoi. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Hanoi. Reviews last updated March 3, 2025.
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,068 reviews
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Cathay Pacific
7.5
Good
825 reviews
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Qatar Airways
7.4
Good
3,568 reviews
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,679 reviews
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Canada
7.0
Good
8,829 reviews
Delta
8.0
Very good
8,068 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from St. Louis to Hanoi round-trip?

    Currently priced at $1,048, United Airlines will fly you from St. Louis to Hanoi and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Qatar Airways and Cathay Pacific - these airlines can fly you to your destination from $1,331 and $1,338, respectively. Users have found that United Airlines is 35% cheaper than the other options available to this destination.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Hanoi?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Hanoi (average of $975). Flying from St. Louis to Hanoi in December is currently the most expensive (average of $1,618). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from St. Louis to Hanoi

Discover the top airline that operate flights from St. Louis to Hanoi. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$1,294Average$1,656FlexibilityNo cancel feeOn-timeN/A
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