$442 Cheap Flights from St. Louis (STL) to Hanoi (HAN)

View $442 flight on Wed, Jan 21, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)

Cheap Flights from St. Louis to Hanoi (STL-HAN)

Prices were available within the past 7 days and start at $442 for one-way flights and $920 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Mar 30 - Mon, Apr 13
STL
St. Louis
HAN
Hanoi
$920 Roundtrip, found 13 hours ago
$920
Roundtrip
found 13 hours ago
Select Delta flight, departing Mon, Mar 30 from St. Louis to Hanoi, returning Mon, Apr 13, priced at $920 found 13 hours ago
American Airlines
Wed, Feb 25 - Thu, Mar 12
STL
St. Louis
HAN
Hanoi
$957 Roundtrip, found 13 hours ago
$957
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Wed, Feb 25 from St. Louis to Hanoi, returning Thu, Mar 12, priced at $957 found 13 hours ago
Delta
Fri, Apr 3 - Mon, Apr 13
STL
St. Louis
HAN
Hanoi
$960 Roundtrip, found 13 hours ago
$960
Roundtrip
found 13 hours ago
Select Delta flight, departing Fri, Apr 3 from St. Louis to Hanoi, returning Mon, Apr 13, priced at $960 found 13 hours ago
American Airlines
Sun, Feb 1 - Mon, Feb 9
STL
St. Louis
HAN
Hanoi
$963 Roundtrip, found 14 hours ago
$963
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Sun, Feb 1 from St. Louis to Hanoi, returning Mon, Feb 9, priced at $963 found 14 hours ago
Delta
Fri, Nov 28 - Mon, Dec 8
STL
St. Louis
HAN
Hanoi
$966 Roundtrip, found 4 days ago
$966
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Nov 28 from St. Louis to Hanoi, returning Mon, Dec 8, priced at $966 found 4 days ago
Cathay Pacific
Mon, Feb 23 - Thu, Mar 12
STL
St. Louis
HAN
Hanoi
$976 Roundtrip, found 13 hours ago
$976
Roundtrip
found 13 hours ago
Select Cathay Pacific flight, departing Mon, Feb 23 from St. Louis to Hanoi, returning Thu, Mar 12, priced at $976 found 13 hours ago
Cathay Pacific
Mon, Jan 12 - Mon, Jan 26
STL
St. Louis
HAN
Hanoi
$996 Roundtrip, just found
$996
Roundtrip
just found
Select Cathay Pacific flight, departing Mon, Jan 12 from St. Louis to Hanoi, returning Mon, Jan 26, priced at $996 just found
United
Mon, Apr 20 - Sun, May 10
STL
St. Louis
HAN
Hanoi
$1,007 Roundtrip, found 21 hours ago
$1,007
Roundtrip
found 21 hours ago
Select United flight, departing Mon, Apr 20 from St. Louis to Hanoi, returning Sun, May 10, priced at $1,007 found 21 hours ago
Japan Airlines
Tue, Jan 20 - Tue, Feb 10
STL
St. Louis
HAN
Hanoi
$1,023 Roundtrip, found 20 hours ago
$1,023
Roundtrip
found 20 hours ago
Select Japan Airlines flight, departing Tue, Jan 20 from St. Louis to Hanoi, returning Tue, Feb 10, priced at $1,023 found 20 hours ago
All Nippon Airways
Tue, Apr 28 - Mon, May 11
STL
St. Louis
HAN
Hanoi
$1,039 Roundtrip, found 21 hours ago
$1,039
Roundtrip
found 21 hours ago
Select All Nippon Airways flight, departing Tue, Apr 28 from St. Louis to Hanoi, returning Mon, May 11, priced at $1,039 found 21 hours ago

Alternative airports near Hanoi

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Noi Bai Intl. HAN. Cheapest and Closest option available. Average driving time to city center is 24 minutes. Flights from $1,271
HAN
Noi Bai Intl.
CheapestClosest
Average driving time to city center24 min
Flights from $1,271

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN) cost?
Secure a cheap one-way flight from $442 or cheap return flight from $920 from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)?
The cheapest month to fly from STL to HAN is March, when demand is low. Off-peak season is generally when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to HAN flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to HAN?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN) last-minute?
Booking your plane ticket from STL to HAN just before your trip is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to HAN flight and hotel package?
You'll typically save money by booking a STL to HAN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your ideal accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Noi Bai Intl. Airport (HAN)?
In most instances, you can reschedule or cancel your STL to HAN flight. However, additional fees may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, go to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Noi Bai Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, Japan Airlines, Korean Air, Lufthansa, Qatar Airways, Turkish Airlines, United
Roundtrip price
$920
Distance
8163 mi

Book with confidence

St. Louis to Hanoi Flights

The cheapest times to fly from St. Louis to Hanoi

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Hanoi are during the month of March. You can find some of the cheapest flights from St. Louis to Hanoi with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Hanoi

Sunday is one of the best days to book for cheap flights from St. Louis to Hanoi: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Hanoi

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Hanoi in 2025. You can also book with separate airlines for your outbound and return journeys, from $442 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Hanoi flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Hanoi airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Hanoi Flights

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*Available to One Key members.