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

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Compare St Louis to Hanoi flight deals

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Flight deals from St Louis to Hanoi

Looking for a cheap last-minute deal or the best round-trip flight from St Louis to Hanoi? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from St Louis to Hanoi

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Hanoi flights are currently cheapest in August.

St Louis to Hanoi: Alternative routes

Compare routes from St Louis to Hanoi below. You may find an airport to fly into that's cheaper, faster, or easier than Hanoi.

St Louis to Hanoi: Flight information

The things to know before you go.
Cheapest flight found$509
Cheapest month to flyAugust

Finding cheap flights from St Louis to Hanoi: Frequently asked questions

The best price we found for a round-trip flight from St Louis to Hanoi is $1,064. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Hanoi. But we found flights with one or more stops from $1,061.
There are no flights flying from St Louis to Hanoi, as of May 2025.
The cheapest month to fly from St Louis to Hanoi is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Hanoi Airport on Saturday, September 13, 2025.
No airlines currently offer direct flights between St Louis Airport and Hanoi Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Hanoi but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Hanoi is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, ANA (All Nippon Airways) offers the cheapest flight tickets to Hanoi.

Traveling from Lambert-St. Louis International Airport (STL) to Noi Bai International Airport (HAN): what you need to know

  • Hanoi's timezone is UTC+7, which makes Hanoi 12 hours ahead of St Louis.

  • Leave plenty of time to catch your STL to HAN flight. As a general rule, arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as July, it's best to get to the airport even earlier. Plan to arrive two hours before a domestic departure and four hours ahead of an international flight whenever you're traveling during a peak period in general.

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Noi Bai International Airport (HAN)

  • The cheapest price we've found for a one-way Lambert-St. Louis International Airport to Noi Bai International Airport flight is $507. A return fare is currently $1,064. Depending on the availability when you book, these fares can change.

  • To pick up cheap tickets from STL to HAN, book ahead. Airlines generally offer their most competitively priced fares when flights are first made available.

  • The 'Whole month' search function shows you the cheapest flights from Lambert-St. Louis International Airport to Noi Bai International Airport across each month. It's a good way to snap up a bargain if your travel dates aren't set in stone.

  • You won't have to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll let you know as soon as there's a better deal on cheap flights from STL to HAN.

  • Choose your preferred arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Lambert-St. Louis International Airport to Noi Bai International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Noi Bai International Airport (HAN)

  • Consider booking a hotel close to HAN if you have a late Lambert-St. Louis International Airport to Noi Bai International Airport flight. Check in to one of these accommodation options and avoid the hassle of a long transfer:

  • Start your adventure sooner with a Noi Bai International Airport rental car. Book your wheels from Dichung Car Rental to explore parts of Hanoi that most tourists miss.

  • Book your vehicle from Noi Bai International Airport a few weeks before your departure date to lock in the best possible deal. If you're planning to travel during a busy period, it's wise to book even earlier.

Getting from Noi Bai International Airport (HAN) to central Hanoi

  • Noi Bai International Airport to central Hanoi has a drive time of around 35 minutes. It's approximately 16 miles away.

  • Getting there by public transport will take you around 1 hour 55 minutes.

When to fly to Noi Bai International Airport (HAN)

  • It's time to choose your trip dates for your flight from Lambert-St. Louis International Airport to Noi Bai International Airport. July is the most popular month to visit Hanoi. If you want a quieter vibe, go in April.

  • When booking your flight from Lambert-St. Louis International Airport to Noi Bai International Airport, consider the type of weather you enjoy. June is the warmest month in Hanoi, with temperatures ranging from 77ºF to 97ºF.

  • Look for cheap tickets from STL to HAN in January if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between 50ºF and 72ºF on average.

Explore more of Vietnam

  • Việt Trì is just one of the many places in Vietnam waiting to be discovered after you've experienced Hanoi. Around 30 miles away to the north-west, its best attractions include Vườn Lan Hiền Vũ, Nhà Vườn Tiến An and Vườn lan Ngọc Tân.

  • Around 140 miles east of Hanoi, Móng Cái is another favorite stop in Vietnam. Get a taste of what this destination has to offer at Tra Co beach, Moncay Catholic Church and Chimsu Chill on the beach.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.