What is the cheapest airline that flies from Japan to Lambert-St Louis?

American Airlines, Delta, and United Airlines are the most popular carriers operating from Japan to Lambert-St Louis

How long does it take to fly to St. Louis?

Flight times from Japan to St. Louis vary, but if you’re flying out of Tokyo and flying into St. Louis (one of the most popular routes), then the duration is 19h 23m on average. Another popular route from Japan to St. Louis is flying from Fukuoka to St. Louis, which will take roughly 45h 38m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to St. Louis?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to St. Louis from Japan according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Japan to Lambert-St Louis Airport?

Prices for flights from Japan to Lambert-St Louis Airport refresh daily.

How many operators does momondo search for flights from Japan to Lambert-St Louis Airport?

As of September 2025, there are 3 operators available to choose from for flights from Japan to Lambert-St Louis Airport.

How old do you have to be to fly from Japan to Lambert-St Louis Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Japan to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$415 Cheap Flights from Japan to St. Louis in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Japan to St. Louis

Round-trip

One-way

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

3:50 pm - 10:49 amHND-STL

32h 59m2 stops

1:35 pm - 2:50 pmSTL-HND

35h 15m2 stops

$718United Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

3:45 pm - 11:57 pmHND-STL

22h 12m2 stops

8:25 am - 4:50 pmSTL-HND

18h 25m1 stop

$720United Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

4:20 pm - 4:45 pmHND-STL

14h 25m1 stop

3:59 pm - 4:15 pmSTL-HND

34h 16m2 stops

$721Delta

Find Deal

Fri, Sep 26 - Sat, Oct 18

3:15 pm - 10:04 pmHND-STL

20h 49m2 stops

6:00 am - 5:45 pmSTL-HND

21h 45m2 stops

$722Delta

Find Deal

Wed, Oct 22 - Wed, Oct 29

7:45 pm - 10:59 pmHND-STL

17h 14m1 stop

8:50 am - 3:55 pmSTL-HND

17h 05m1 stop

$741American Airlines

Find Deal

Sun, Sep 21 - Wed, Sep 24

6:50 pm - 3:29 pmHND-STL

35h 39m1 stop

5:18 pm - 4:40 pmSTL-HND

33h 22m2 stops

$830Air Canada

Find Deal

Fri, Mar 6 - Tue, Mar 10

6:50 pm - 2:23 pmHND-STL

58h 33m2 stops

4:05 pm - 4:40 pmSTL-HND

33h 35m1 stop

$831Air Canada

Find Deal

Wed, Dec 3 - Sun, Dec 7

6:00 pm - 11:59 pmOKA-STL

44h 59m2 stops

7:00 am - 10:40 pmSTL-OKA

24h 40m2 stops

$1,004Alaska Airlines

Find Deal

Wed, Nov 5 - Tue, Nov 11

7:00 pm - 11:59 pmOKA-STL

43h 59m2 stops

4:14 pm - 5:45 pmSTL-OKA

58h 31m2 stops

$1,024Alaska Airlines

Find Deal

Wed, Nov 5 - Mon, Nov 10

7:30 am - 11:42 pmOKA-STL

31h 12m2 stops

3:06 pm - 8:10 pmSTL-OKA

38h 04m2 stops

$1,179American Airlines

Find Deal

Tue, Nov 4 - Mon, Nov 10

United Airlines flights from Japan to St. Louis

Our best United Airlines deals on Japan to St. Louis flight tickets

United Airlines

Oct 22

HND3:50 pmTokyo Haneda

32h 59m

2 stops

STL10:49 amLambert-St Louis

Oct 29

STL1:35 pmLambert-St Louis

35h 15m

2 stops

HND2:50 pmTokyo Haneda

$718

Find similar

United Airlines

Oct 22

HND3:45 pmTokyo Haneda

22h 12m

2 stops

STL11:57 pmLambert-St Louis

Oct 29

STL8:25 amLambert-St Louis

18h 25m

1 stop

HND4:50 pmTokyo Haneda

$720

Find similar

United Airlines

Sep 21

HND6:25 pmTokyo Haneda

38h 33m

2 stops

STL6:58 pmLambert-St Louis

Sep 24

STL1:39 pmLambert-St Louis

35h 36m

2 stops

HND3:15 pmTokyo Haneda

$764

Find similar

Delta flights from Japan to St. Louis

Our best Delta deals on Japan to St. Louis flight tickets

Delta

Sep 26

HND4:20 pmTokyo Haneda

14h 25m

1 stop

STL4:45 pmLambert-St Louis

Oct 18

STL3:59 pmLambert-St Louis

34h 16m

2 stops

HND4:15 pmTokyo Haneda

$721

Find similar

Delta

Oct 22

HND3:15 pmTokyo Haneda

20h 49m

2 stops

STL10:04 pmLambert-St Louis

Oct 29

STL6:00 amLambert-St Louis

21h 45m

2 stops

HND5:45 pmTokyo Haneda

$722

Find similar

Delta

Sep 27

HND4:20 pmTokyo Haneda

20h 49m

1 stop

STL11:09 pmLambert-St Louis

Oct 20

STL5:31 pmLambert-St Louis

29h 34m

1 stop

HND1:05 pmTokyo Haneda

$765

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Wed 10/22

3:50 pm-10:49 am

2 stops32h 59m

Lambert-St Louis

Wed 10/29

1:35 pm-2:50 pm

2 stops35h 15m

$718

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Wed 10/22

3:45 pm-11:57 pm

2 stops22h 12m

Lambert-St Louis

Wed 10/29

8:25 am-4:50 pm

1 stop18h 25m

$720

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Fri 9/26

4:20 pm-4:45 pm

1 stop14h 25m

Lambert-St Louis

Sat 10/18

3:59 pm-4:15 pm

2 stops34h 16m

$721

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Wed 10/22

3:15 pm-10:04 pm

2 stops20h 49m

Lambert-St Louis

Wed 10/29

6:00 am-5:45 pm

2 stops21h 45m

$722

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Sun 9/21

7:45 pm-10:59 pm

1 stop17h 14m

Lambert-St Louis

Wed 9/24

8:50 am-3:55 pm

1 stop17h 05m

$741

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Fri 3/6

6:50 pm-3:29 pm

1 stop35h 39m

Lambert-St Louis

Tue 3/10

5:18 pm-4:40 pm

2 stops33h 22m

$830

TokyoSt. Louis

HND - STL

HNDSTL

Tokyo Haneda

Wed 12/3

6:50 pm-2:23 pm

2 stops58h 33m

Lambert-St Louis

Sun 12/7

4:05 pm-4:40 pm

1 stop33h 35m

$831

OkinawaSt. Louis

OKA - STL

OKASTL

Okinawa Naha

Wed 11/5

6:00 pm-11:59 pm

2 stops44h 59m

Lambert-St Louis

Tue 11/11

7:00 am-10:40 pm

2 stops24h 40m

$1,004

OkinawaSt. Louis

OKA - STL

OKASTL

Okinawa Naha

Wed 11/5

7:00 pm-11:59 pm

2 stops43h 59m

Lambert-St Louis

Mon 11/10

4:14 pm-5:45 pm

2 stops58h 31m

$1,024

OkinawaSt. Louis

OKA - STL

OKASTL

Okinawa Naha

Tue 11/4

7:30 am-11:42 pm

2 stops31h 12m

Lambert-St Louis

Mon 11/10

3:06 pm-8:10 pm

2 stops38h 04m

$1,179

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Japan to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Monday when prices can be found for as low as $804. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,647. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Japan in the evening is the least expensive time of day to depart. momondo users have found prices as low as $984 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,258 per ticket.

Can stopping save me money on Japan to St. Louis flights?

You could potentially save up to 33% on your flight if you consider stops on a Japan to St. Louis flight.

Cheap Japan to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Japan to St. Louis

Direct flights	None

There are no direct flights from Japan to St. Louis. There are no popular flight routes from Japan to St. Louis.

Search flight deals

When did momondo last update prices for flights from Japan to Lambert-St Louis Airport?
Prices for flights from Japan to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Japan to Lambert-St Louis Airport?
As of September 2025, there are 3 operators available to choose from for flights from Japan to Lambert-St Louis Airport.
How old do you have to be to fly from Japan to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Japan to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Japan to St. Louis

Compare and see reviews for airlines that fly from Japan to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $721	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $787	Free Cancellation	Rating 7.4 8,944 reviews	Search United Airlines flights
Delta	PriceFrom $803	Free Cancellation	Rating 7.9 7,966 reviews	Search Delta flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Fenton

Collinsville

Wentzville

Alton

St. Peters

Farmington

Festus

Glencoe

Clayton

Edwardsville

Eureka

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Japan to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Japan to St. Louis for you.

Can I find flights from Japan to St. Louis with flexible booking policies on momondo?

Flights from Japan to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Japan to St. Louis?

momondo helps you find the best flight between Japan and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Japan to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Japan to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.