STL - HAN

$544 Find Cheap Flights from St. Louis to Hanoi

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Hanoi departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Hanoi

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Hanoi, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Hanoi, as well as popular online travel agencies
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Hanoi that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Hanoi

Thu, Feb 5 - Mon, Feb 16
Multiple Airlines Logo
2:55 pm - 5:25 pmSTL-HAN
37h 30m2 stops
Multiple Airlines Logo
11:30 am - 11:56 pmHAN-STL
25h 26m2 stops
$1,038Multiple Airlines
Find Deal
Fri, Oct 17 - Fri, Nov 7
Multiple Airlines Logo
3:57 pm - 10:25 amSTL-HAN
30h 28m2 stops
Multiple Airlines Logo
11:30 am - 11:59 pmHAN-STL
25h 29m2 stops
$1,086Multiple Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
American Airlines Logo
7:01 am - 9:50 pmSTL-HAN
26h 49m2 stops
American Airlines Logo
11:20 pm - 8:51 pmHAN-STL
33h 31m2 stops
$1,114American Airlines
Find Deal
Fri, Oct 17 - Thu, Nov 6
Qatar Airways Logo
6:08 pm - 7:15 amSTL-HAN
49h 07m2 stops
Qatar Airways Logo
3:00 am - 11:56 pmHAN-STL
33h 56m2 stops
$1,364Qatar Airways
Find Deal
Fri, Oct 17 - Thu, Nov 6
Qatar Airways Logo
7:00 pm - 7:15 amSTL-HAN
48h 15m2 stops
Qatar Airways Logo
3:00 am - 11:56 pmHAN-STL
33h 56m2 stops
$1,421Qatar Airways
Find Deal
Thu, Feb 5 - Sun, Feb 15
Multiple Airlines Logo
2:55 pm - 1:10 pmSTL-HAN
57h 15m2 stops
Multiple Airlines Logo
12:25 am - 11:56 pmHAN-STL
36h 31m2 stops
$1,441Multiple Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
United Airlines Logo
5:15 am - 10:15 pmSTL-HAN
29h 00m2 stops
United Airlines Logo
11:35 pm - 10:00 pmHAN-STL
34h 25m3 stops
$1,582United Airlines
Find Deal
Sun, Oct 12 - Sat, Oct 18
Multiple Airlines Logo
8:49 am - 7:15 amSTL-HAN
34h 26m2 stops
Multiple Airlines Logo
2:30 am - 12:03 amHAN-STL
57h 33m2 stops
$1,703Multiple Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
Multiple Airlines Logo
1:30 pm - 11:05 amSTL-HAN
33h 35m3 stops
Multiple Airlines Logo
5:50 pm - 3:18 pmHAN-STL
33h 28m3 stops
$2,096Multiple Airlines
Find Deal
Wed, Oct 29 - Thu, Nov 13
United Airlines Logo
6:30 am - 11:05 pmSTL-HAN
28h 35m3 stops
United Airlines Logo
12:25 am - 4:27 pmHAN-STL
29h 02m2 stops
$7,006United Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $1,114 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$1,038
Typical prices: $1,189-1402
Multiple Airlines
Thu 2/5Mon 2/16
STL - HAN • 2 stops
Cheapest one-way
$544
American Airlines
Wed 12/31
STL - HAN • 2 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Hanoi!
Booking Insights

KAYAK's insights & trends for St. Louis to Hanoi flights

Get data-powered insights and trends into flights from St. Louis to Hanoi to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Hanoi?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Hanoi were found on American Airlines ($1,114) and Qatar Airways ($1,364).

Find deals

Good to know

Low seasonSeptember
Cheapest flight$544
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from St. Louis to Hanoi

When to book flights from St. Louis to Hanoi

Are your dates flexible? Find out the best times to travel from St. Louis to Hanoi based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Hanoi

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

    In the last 3 days, the lowest price for a flight from St. Louis to Hanoi was $544 for a one-way ticket and $1,038 for a round-trip.

  • Do I need a passport to fly between St. Louis and Hanoi?

    Yes, you’ll need a passport to travel to Hanoi from St. Louis.

  • Which aircraft models fly most regularly from St. Louis to Hanoi?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Hanoi?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Hanoi, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from St. Louis to Hanoi?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Hanoi.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Hanoi?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Hanoi from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Hanoi?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Hanoi with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and HAN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Hanoi?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Hanoi from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Hanoi

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Hanoi. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Hanoi? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7954 reviews
7.3Food
7.9Comfort
7.9Entertainment
8.2Boarding
8.5Crew
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

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

Information on your arrival and departure airports

St. Louis (STL)
Hanoi (HAN)

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