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

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

What airlines fly to Japan?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Japan from St. Louis according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Japan. Keep in mind that there are 6 different airlines that fly to Japan on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Lambert-St Louis Airport to Japan were last updated today.

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

There are 6 operators available for flights from Lambert-St Louis Airport to Japan as of May 2026.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Japan.

What documentation or ID do you need to fly to Japan?

The necessary travel and health documents for your Japan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$388 Cheap Flights from St. Louis to Japan in 2026

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Find the cheapest flights from St. Louis to Japan

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:59 pm - 8:05 am

STL

FUK

29h 06m

2 stops

12:55 pm - 6:16 pm

FUK

STL

19h 21m

2 stops

$1,076ANA

Sun, Aug 30 - Tue, Sep 15

12:59 pm - 5:30 pm

STL

FUK

38h 31m

2 stops

12:15 pm - 6:39 pm

FUK

STL

20h 24m

2 stops

$1,095United Airlines

Mon, Aug 24 - Fri, Aug 28

5:42 am - 7:25 pm

STL

OKA

23h 43m

2 stops

7:25 am - 6:10 pm

OKA

STL

24h 45m

2 stops

$1,146American Airlines

Sun, Aug 30 - Sun, Sep 6

6:30 am - 6:40 pm

STL

ITM

22h 10m

2 stops

2:35 pm - 10:00 pm

ITM

STL

21h 25m

2 stops

$1,184American Airlines

Tue, Sep 15 - Tue, Sep 22

6:20 am - 1:05 pm

STL

HND

16h 45m

1 stop

4:05 pm - 4:45 pm

HND

STL

14h 40m

1 stop

$1,289Delta

Fri, Aug 28 - Mon, Sep 7

6:37 am - 3:50 pm

STL

HND

19h 13m

1 stop

7:45 pm - 10:55 pm

HND

STL

17h 10m

1 stop

$1,313Japan Airlines

Tue, Aug 4 - Tue, Aug 25

6:30 am - 4:15 pm

STL

HND

19h 45m

1 stop

6:25 pm - 8:42 pm

HND

STL

16h 17m

1 stop

$1,315Delta

Sun, Aug 2 - Wed, Aug 19

8:36 am - 5:45 pm

STL

ITM

19h 09m

2 stops

7:05 am - 6:10 pm

ITM

STL

25h 05m

2 stops

$1,317Japan Airlines

Wed, Aug 5 - Fri, Aug 14

8:55 am - 7:40 pm

STL

HIJ

20h 45m

2 stops

12:35 pm - 2:00 pm

HIJ

STL

39h 25m

2 stops

$1,818Air Canada

Sun, Sep 6 - Thu, Sep 10

2:40 pm - 7:10 pm

STL

OKJ

38h 30m

2 stops

2:15 pm - 8:00 pm

OKJ

STL

19h 45m

2 stops

$1,825Air Canada

Sat, Sep 5 - Wed, Sep 9

United Airlines flights from St. Louis to Japan

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

United Airlines

Aug 24

STL12:59 pmLambert-St Louis

38h 31m

2 stops

FUK5:30 pmFukuoka

Aug 28

FUK12:15 pmFukuoka

20h 24m

2 stops

STL6:39 pmLambert-St Louis

$1,095

United Airlines

Aug 24

STL5:30 pmLambert-St Louis

31h 20m

2 stops

KIX2:50 pmOsaka Kansai Intl

Aug 28

KIX4:55 pmOsaka Kansai Intl

15h 44m

1 stop

STL6:39 pmLambert-St Louis

$1,096

United Airlines

Aug 24

STL12:59 pmLambert-St Louis

38h 06m

2 stops

ITM5:05 pmOsaka Itami

Aug 28

ITM12:50 pmOsaka Itami

24h 09m

2 stops

STL10:59 pmLambert-St Louis

$1,098

ANA flights from St. Louis to Japan

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

ANA

Aug 30

STL12:59 pmLambert-St Louis

29h 06m

2 stops

FUK8:05 amFukuoka

Sep 15

FUK12:55 pmFukuoka

19h 21m

2 stops

STL6:16 pmLambert-St Louis

$1,076

ANA

Aug 5

STL5:10 amLambert-St Louis

19h 40m

2 stops

KIX2:50 pmOsaka Kansai Intl

Aug 14

KIX4:55 pmOsaka Kansai Intl

36h 36m

1 stop

STL3:31 pmLambert-St Louis

$1,159

ANA

Aug 22

STL12:59 pmLambert-St Louis

40h 51m

2 stops

KIX7:50 pmOsaka Kansai Intl

Aug 29

KIX9:20 amOsaka Kansai Intl

25h 42m

2 stops

STL9:02 pmLambert-St Louis

$1,189

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Sun 8/30

12:59 pm-8:05 am

2 stops29h 06m

Fukuoka

Tue 9/15

12:55 pm-6:16 pm

2 stops19h 21m

$1,076

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Mon 8/24

12:59 pm-5:30 pm

2 stops38h 31m

Fukuoka

Fri 8/28

12:15 pm-6:39 pm

2 stops20h 24m

$1,095

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Sun 8/30

5:42 am-7:25 pm

2 stops23h 43m

Okinawa Naha

Sun 9/6

7:25 am-6:10 pm

2 stops24h 45m

$1,146

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:30 am-6:40 pm

2 stops22h 10m

Osaka Itami

Tue 9/22

2:35 pm-10:00 pm

2 stops21h 25m

$1,184

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Fri 8/28

6:20 am-1:05 pm

1 stop16h 45m

Tokyo Haneda

Mon 9/7

4:05 pm-4:45 pm

1 stop14h 40m

$1,289

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 8/4

6:37 am-3:50 pm

1 stop19h 13m

Tokyo Haneda

Tue 8/25

7:45 pm-10:55 pm

1 stop17h 10m

$1,313

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 8/2

6:30 am-4:15 pm

1 stop19h 45m

Tokyo Haneda

Wed 8/19

6:25 pm-8:42 pm

1 stop16h 17m

$1,315

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

8:36 am-5:45 pm

2 stops19h 09m

Osaka Itami

Fri 8/14

7:05 am-6:10 pm

2 stops25h 05m

$1,317

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Sun 9/6

8:55 am-7:40 pm

2 stops20h 45m

Hiroshima

Thu 9/10

12:35 pm-2:00 pm

2 stops39h 25m

$1,818

St. LouisOkayama

STL - OKJ

STLOKJ

Lambert-St Louis

Sat 9/5

2:40 pm-7:10 pm

2 stops38h 30m

Okayama

Wed 9/9

2:15 pm-8:00 pm

2 stops19h 45m

$1,825

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 St. Louis to Japan

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

What is the cheapest month to fly to Japan?

The month of March is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $349. If you aren’t able to travel to Japan during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $383.

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

You could potentially save up to 11% on your flight if you consider stops on a St. Louis to Japan flight.

Cheap St. Louis to Japan flight deals and tips

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

Fastest flight time	15h 42m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 42m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Japan

When did momondo last update prices for flights from Lambert-St Louis Airport to Japan?
Prices for flights from Lambert-St Louis Airport to Japan were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Japan?
There are 6 operators available for flights from Lambert-St Louis Airport to Japan as of May 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Japan?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Japan.
What documentation or ID do you need to fly to Japan?
The necessary travel and health documents for your Japan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Japan

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

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $593	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 11,045 reviews	Search Air Canada flights
Delta	PriceFrom $727	Free Cancellation	Rating 7.9 8,455 reviews	Search Delta flights
United Airlines	PriceFrom $747	Free Cancellation	Rating 7.4 9,727 reviews	Search United Airlines flights
ANA	PriceFrom $777	Free Cancellation	Rating 8.3 1,210 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,825 reviews	Search Japan Airlines flights

Why use momondo?

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

Finding the right flight to Japan from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Japan quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Japan from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for St. Louis to Japan flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Japan from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.