STL - HAN

$507 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 11/4. 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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Flights 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

Sat, Sep 20 - Wed, Sep 24
Delta Logo
8:40 am - 9:35 pmSTL-HAN
24h 55m2 stops
Delta Logo
11:10 pm - 11:09 pmHAN-STL
35h 59m2 stops
$998Delta
Find Deal
Sat, Sep 20 - Wed, Sep 24
Delta Logo
3:55 pm - 9:35 pmSTL-HAN
41h 40m2 stops
Delta Logo
11:10 pm - 11:09 pmHAN-STL
35h 59m2 stops
$999Delta
Find Deal
Sat, Sep 20 - Wed, Sep 24
United Airlines Logo
6:00 am - 10:15 pmSTL-HAN
28h 15m2 stops
United Airlines Logo
11:35 pm - 10:00 pmHAN-STL
34h 25m3 stops
$1,010United Airlines
Find Deal
Wed, Sep 3 - Fri, Oct 3
 Logo
6:00 am - 10:15 pmSTL-HAN
28h 15m2 stops
 Logo
11:20 pm - 10:59 pmHAN-STL
35h 39m2 stops
$1,014
Find Deal
Fri, Sep 12 - Sun, Sep 28
United Airlines Logo
5:49 pm - 10:15 pmSTL-HAN
40h 26m2 stops
United Airlines Logo
11:35 pm - 10:00 pmHAN-STL
34h 25m3 stops
$1,019United Airlines
Find Deal
Sat, Oct 11 - Wed, Nov 5
EVA Air Logo
3:57 pm - 4:50 pmSTL-HAN
36h 53m2 stops
EVA Air Logo
12:35 pm - 3:18 pmHAN-STL
39h 43m2 stops
$1,088EVA Air
Find Deal
Sat, Oct 18 - Tue, Nov 11
ANA Logo
3:23 pm - 10:15 pmSTL-HAN
42h 52m2 stops
ANA Logo
12:25 am - 3:50 pmHAN-STL
28h 25m2 stops
$1,122ANA
Find Deal
Wed, Sep 3 - Thu, Oct 2
 Logo
9:17 am - 10:15 pmSTL-HAN
48h 58m2 stops
 Logo
12:40 am - 12:28 pmHAN-STL
47h 48m2 stops
$1,180
Find Deal
Fri, Oct 3 - Thu, Oct 23
EVA Air Logo
3:35 pm - 11:05 amSTL-HAN
31h 30m2 stops
EVA Air Logo
6:00 pm - 3:01 pmHAN-STL
33h 01m2 stops
$1,230EVA Air
Find Deal
Fri, Oct 17 - Wed, Nov 5
ANA Logo
9:20 am - 10:15 pmSTL-HAN
24h 55m2 stops
ANA Logo
12:25 am - 7:39 pmHAN-STL
32h 14m2 stops
$1,576ANA
Find Deal
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.

What is the cheapest month to fly from St. Louis to Hanoi?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Hanoi, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Hanoi is September, where tickets cost $996 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $2,678 and $1,756 respectively.

Good to know

Low seasonJanuary
Cheapest flight$507
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 18% increase in price.
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 $507 for a one-way ticket and $998 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, SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Hanoi, with Star Alliance 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.
8.0
DeltaOverall score based on 7980 reviews
7.3Food
8.5Crew
8.2Boarding
7.9Entertainment
7.9Comfort
Airline reviews

Delayed and took off even later than the scheduled delay time

8.0 ExcellentAnonymous, Jul 2025DTW - SEA
Read more Delta reviews

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

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

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