Which airports can I use when flying from St. Louis to Hanoi?

Flights from St. Louis to Hanoi usually depart from Lambert-St Louis (STL) and arrive at Hanoi Noibai (HAN).

What cabin classes can I book on flights from St. Louis to Hanoi?

Two cabin classes are available on flights from St. Louis to Hanoi: • Economy Class • First Class

Can I save money by using flexible dates for flights from St. Louis to Hanoi?

Yes. Flexible dates can save you up to 28% on flights from St. Louis to Hanoi. Wednesday is the cheapest departure day at $1,179 round-trip on average, while Friday is the most expensive at $1,632, a difference of $453. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Hanoi?

Some of the most popular sights in Hanoi are Hoan Kiem Lake, Old City Gate and Hanoi Opera House. These are among the most viewed places in Hanoi on KAYAK.

Do I need a passport to fly from St. Louis to Hanoi?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from St. Louis to Hanoi looking right now?

One-way fares from St. Louis to Hanoi are currently higher than usual. Average one-way flight prices are about $693, which is 11% above the typical average for this route.

What is the time difference between St. Louis and Hanoi?

Hanoi is 12 hours ahead of St. Louis (Indochina Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

How much should I expect to pay for a St. Louis to Hanoi flight?

Round-trip flights from St. Louis to Hanoi range from $1,085 to $1,446, with an average of $1,266 over the past 12 months. Anything below $1,085 counts as a good deal.

What's the cheapest day of the week to fly from St. Louis to Hanoi?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from St. Louis to Hanoi. It’s 7% cheaper than the average day, while Friday is the most expensive, with prices 28% higher.

Which airline is the cheapest to fly from St. Louis to Hanoi?

Japan Airlines ($1,159) and Korean Air ($1,173) are the cheapest airlines to fly round-trip from St. Louis to Hanoi according to KAYAK data over the last 5 days.

$551 CHEAP FLIGHTS from St. Louis to Hanoi (STL - HAN)

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$1,129

Typical prices: $1,085-$1,446

Cathay Pacific

Fri 11/9Fri 11/16

STL - HAN • 2 stops

Cheapest one-way

$551

Typical prices: $528-$781

Multiple Airlines

Fri 2/23

STL - HAN • 2 stops

When to travel

January

Cheapest • 24% price drop

October

Most popular

Good to know

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We hope you love your trip to Hanoi!

Flight Deals

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

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

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

Mon, Nov 9 - Mon, Nov 16

6:00 am - 3:45 pmSTL Lambert-St Louis-HAN Hanoi Noibai

44h 45m2 stops Seattle/Tacoma Intl Hong Kong Intl

10:30 am - 11:33 pmHAN Hanoi Noibai-STL Lambert-St Louis

26h 03m2 stops Hong Kong Intl Dallas/Fort Worth

$1,129Multiple Airlines

Mon, Jan 11 - Mon, Jan 18

7:21 am - 10:25 pmSTL Lambert-St Louis-HAN Hanoi Noibai

26h 04m2 stops Chicago O'Hare Intl Tokyo Narita

11:55 pm - 11:36 pmHAN Hanoi Noibai-STL Lambert-St Louis

36h 41m2 stops Tokyo Narita Los Angeles

$1,159Japan Airlines

Thu, Nov 12 - Mon, Nov 16

6:00 am - 3:45 pmSTL Lambert-St Louis-HAN Hanoi Noibai

44h 45m2 stops Seattle/Tacoma Intl Hong Kong Intl

10:30 am - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

22h 49m2 stops Hong Kong Intl Dallas/Fort Worth

$1,174Cathay Pacific

Thu, Nov 12 - Mon, Nov 16

7:26 am - 3:45 pmSTL Lambert-St Louis-HAN Hanoi Noibai

43h 19m2 stops Chicago O'Hare Intl Hong Kong Intl

10:30 am - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

22h 49m2 stops Hong Kong Intl Dallas/Fort Worth

$1,174Cathay Pacific

Mon, Nov 9 - Mon, Nov 16

7:06 pm - 3:45 pmSTL Lambert-St Louis-HAN Hanoi Noibai

31h 39m2 stops Dallas/Fort Worth Hong Kong Intl

7:25 pm - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

37h 54m2 stops Hong Kong Intl Dallas/Fort Worth

$1,188Cathay Pacific

Mon, Nov 9 - Mon, Nov 16

7:06 pm - 10:05 amSTL Lambert-St Louis-HAN Hanoi Noibai

25h 59m2 stops Dallas/Fort Worth Hong Kong Intl

10:30 am - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

22h 49m2 stops Hong Kong Intl Dallas/Fort Worth

$1,188Cathay Pacific

Mon, Nov 9 - Mon, Nov 16

6:00 am - 10:05 amSTL Lambert-St Louis-HAN Hanoi Noibai

39h 05m2 stops Seattle/Tacoma Intl Hong Kong Intl

10:30 am - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

22h 49m2 stops Hong Kong Intl Dallas/Fort Worth

$1,189Cathay Pacific

Mon, Nov 9 - Mon, Nov 16

6:00 am - 10:05 amSTL Lambert-St Louis-HAN Hanoi Noibai

39h 05m2 stops Seattle/Tacoma Intl Hong Kong Intl

7:25 pm - 4:43 pmHAN Hanoi Noibai-STL Lambert-St Louis

34h 18m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,189Cathay Pacific

Thu, Nov 12 - Mon, Nov 16

7:26 am - 6:15 pmSTL Lambert-St Louis-HAN Hanoi Noibai

45h 49m2 stops Chicago O'Hare Intl Hong Kong Intl

10:30 am - 8:19 pmHAN Hanoi Noibai-STL Lambert-St Louis

22h 49m2 stops Hong Kong Intl Dallas/Fort Worth

$1,227Cathay Pacific

Sat, Mar 13 - Sat, Mar 20

10:25 am - 10:05 amSTL Lambert-St Louis-HAN Hanoi Noibai

34h 40m2 stops Chicago O'Hare Intl Hong Kong Intl

7:25 pm - 8:46 pmHAN Hanoi Noibai-STL Lambert-St Louis

37h 21m2 stops Hong Kong Intl Chicago O'Hare Intl

$1,238Multiple Airlines

Booking Insights

Price, demand and travel trends for St. Louis to Hanoi flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

What's the cheapest day of the week to fly from St. Louis to Hanoi?: Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from St. Louis to Hanoi. It’s 7% cheaper than the average day, while Friday is the most expensive, with prices 28% higher.

Find deals

Low season	May
High season	October
Cheapest flight	$551

Beat the crowds with an average 77% drop in travelers.

The most popular month to fly with an average 56% increase in travelers.

One-way 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.

What cabin classes can I book on flights from St. Louis to Hanoi?
Two cabin classes are available on flights from St. Louis to Hanoi:

• Economy Class
• First Class
Do I need a passport to fly from St. Louis to Hanoi?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a St. Louis to Hanoi flight?
Round-trip flights from St. Louis to Hanoi range from $1,085 to $1,446, with an average of $1,266 over the past 12 months. Anything below $1,085 counts as a good deal.
How are flight prices from St. Louis to Hanoi looking right now?
One-way fares from St. Louis to Hanoi are currently higher than usual. Average one-way flight prices are about $693, which is 11% above the typical average for this route.
Which airports can I use when flying from St. Louis to Hanoi?
Flights from St. Louis to Hanoi usually depart from Lambert-St Louis (STL) and arrive at Hanoi Noibai (HAN).
Can I save money by using flexible dates for flights from St. Louis to Hanoi?
Yes. Flexible dates can save you up to 28% on flights from St. Louis to Hanoi. Wednesday is the cheapest departure day at $1,179 round-trip on average, while Friday is the most expensive at $1,632, a difference of $453.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between St. Louis and Hanoi?
Hanoi is 12 hours ahead of St. Louis (Indochina Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Hanoi?
Some of the most popular sights in Hanoi are Hoan Kiem Lake, Old City Gate and Hanoi Opera House. These are among the most viewed places in Hanoi on KAYAK.

If your dates are flexible, aim for a Wednesday departure and avoid flying on Friday. On this route, Wednesday flights average $1,179, about $453 less than Friday fares (28% savings) based on the last 12 months.
If you can choose when to travel, plan your St. Louis to Hanoi trip for January. Fares historically average $956 round-trip in that month - typically $676 less than the most expensive month, which is February (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Hanoi Noibai Airport.

• Family Transit Hotel

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STL - HAN

$551 Find Cheap Flights from St. Louis to Hanoi - Compare and Save

Everything you should know

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

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

Recent one-way flight deals from St. Louis to Hanoi

Price, demand and travel trends for St. Louis to Hanoi flights

What's the cheapest day of the week to fly from St. Louis to Hanoi?

Which airline is the cheapest to fly from St. Louis to Hanoi?

Key details for St. Louis to Hanoi flights

Low season

High season

Cheapest flight

When to book flights from St. Louis to Hanoi

Your St. Louis to Hanoi flight questions, answered

Your guide to booking St. Louis to Hanoi flights

More options for your flight from St. Louis to Hanoi

Complete your trip to Hanoi with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from St. Louis to Hanoi

Find direct flights to and from St. Louis and Hanoi

Flights from domestic origins to Hanoi

Flights to other popular destinations

Find deals for your return flight