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.

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

Japan Airlines, ANA, and United Airlines are the most popular carriers operating from Lambert-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.

$432 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.

7:01 am - 5:35 pm

STL

ITM

20h 34m

2 stops

2:35 pm - 10:00 pm

ITM

STL

21h 25m

2 stops

$1,184American Airlines

Tue, Sep 15 - Tue, Sep 22

3:42 pm - 11:20 am

STL

KIX

29h 38m

2 stops

9:05 am - 8:50 pm

KIX

STL

25h 45m

2 stops

$1,241Delta

Tue, Sep 15 - Tue, Sep 22

6:42 am - 6:25 pm

STL

OKA

21h 43m

2 stops

11:40 am - 6:14 pm

OKA

STL

20h 34m

2 stops

$1,281American Airlines

Thu, Sep 3 - Sun, Sep 20

6:00 am - 5:30 pm

STL

HND

21h 30m

1 stop

5:25 pm - 10:55 pm

HND

STL

19h 30m

1 stop

$1,448Japan Airlines

Wed, Aug 19 - Wed, Aug 26

9:16 am - 5:05 pm

STL

ITM

41h 49m

2 stops

12:50 pm - 7:31 pm

ITM

STL

20h 41m

2 stops

$1,493United Airlines

Mon, Aug 24 - Fri, Aug 28

9:16 am - 5:05 pm

STL

ITM

41h 49m

2 stops

12:50 pm - 6:24 pm

ITM

STL

19h 34m

2 stops

$1,494United Airlines

Mon, Aug 24 - Fri, Aug 28

9:46 am - 8:30 pm

STL

ITM

20h 44m

2 stops

4:30 pm - 2:25 pm

ITM

STL

35h 55m

2 stops

$1,559Japan Airlines

Tue, Sep 15 - Tue, Sep 22

9:16 am - 6:10 pm

STL

ITM

18h 54m

2 stops

3:30 pm - 12:13 pm

ITM

STL

34h 43m

2 stops

$1,587ANA

Tue, Sep 15 - Tue, Sep 22

2:40 pm - 7:40 pm

STL

HIJ

39h 00m

2 stops

12:35 pm - 2:00 pm

HIJ

STL

39h 25m

2 stops

$1,818Air Canada

Sat, Sep 5 - Wed, Sep 9

2:40 pm - 7:40 pm

STL

HIJ

39h 00m

2 stops

12:35 pm - 8:00 pm

HIJ

STL

21h 25m

2 stops

$1,819Air Canada

Sat, Sep 5 - Wed, Sep 9

Korean Air flights from St. Louis to Japan

Our best Korean Air deals on St. Louis to Japan flight tickets

Korean Air

Sep 6

STL6:00 amLambert-St Louis

24h 00m

2 stops

FUK8:00 pmFukuoka

Sep 9

FUK9:05 pmFukuoka

31h 33m

2 stops

STL2:38 pmLambert-St Louis

$1,778

Korean Air

Sep 7

STL9:00 amLambert-St Louis

36h 50m

2 stops

OKA11:50 amOkinawa Naha

Sep 11

OKA12:50 pmOkinawa Naha

38h 03m

2 stops

STL12:53 pmLambert-St Louis

$1,819

Cathay Pacific flights from St. Louis to Japan

Our best Cathay Pacific deals on St. Louis to Japan flight tickets

Cathay Pacific

Sep 22

STL9:46 amLambert-St Louis

31h 04m

2 stops

NRT6:50 amTokyo Narita

Oct 7

NRT10:00 pmTokyo Narita

39h 05m

2 stops

STL11:05 pmLambert-St Louis

$1,306

Cathay Pacific

Sep 15

STL6:51 pmLambert-St Louis

28h 54m

2 stops

FUK1:45 pmFukuoka

Sep 30

FUK2:00 pmFukuoka

46h 00m

2 stops

STL10:00 pmLambert-St Louis

$1,321

Cathay Pacific

Oct 17

STL3:33 pmLambert-St Louis

32h 57m

2 stops

NRT2:30 pmTokyo Narita

Oct 29

NRT9:00 amTokyo Narita

28h 41m

2 stops

STL11:41 pmLambert-St Louis

$1,356

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

7:01 am-5:35 pm

2 stops20h 34m

Osaka Itami

Tue 9/22

2:35 pm-10:00 pm

2 stops21h 25m

$1,184

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

3:42 pm-11:20 am

2 stops29h 38m

Osaka Kansai Intl

Tue 9/22

9:05 am-8:50 pm

2 stops25h 45m

$1,241

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 9/3

6:42 am-6:25 pm

2 stops21h 43m

Okinawa Naha

Sun 9/20

11:40 am-6:14 pm

2 stops20h 34m

$1,281

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 8/19

6:00 am-5:30 pm

1 stop21h 30m

Tokyo Haneda

Wed 8/26

5:25 pm-10:55 pm

1 stop19h 30m

$1,448

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 8/24

9:16 am-5:05 pm

2 stops41h 49m

Osaka Itami

Fri 8/28

12:50 pm-7:31 pm

2 stops20h 41m

$1,493

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 8/24

9:16 am-5:05 pm

2 stops41h 49m

Osaka Itami

Fri 8/28

12:50 pm-6:24 pm

2 stops19h 34m

$1,494

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

9:46 am-8:30 pm

2 stops20h 44m

Osaka Itami

Tue 9/22

4:30 pm-2:25 pm

2 stops35h 55m

$1,559

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

9:16 am-6:10 pm

2 stops18h 54m

Osaka Itami

Tue 9/22

3:30 pm-12:13 pm

2 stops34h 43m

$1,587

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Sat 9/5

2:40 pm-7:40 pm

2 stops39h 00m

Hiroshima

Wed 9/9

12:35 pm-2:00 pm

2 stops39h 25m

$1,818

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Sat 9/5

2:40 pm-7:40 pm

2 stops39h 00m

Hiroshima

Wed 9/9

12:35 pm-8:00 pm

2 stops21h 25m

$1,819

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 30m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 30m

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 11,668 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 11,014 reviews	Search Air Canada flights
Delta	PriceFrom $727	Free Cancellation	Rating 7.9 8,454 reviews	Search Delta flights
United Airlines	PriceFrom $747	Free Cancellation	Rating 7.4 9,695 reviews	Search United Airlines flights
ANA	PriceFrom $777	Free Cancellation	Rating 8.3 1,207 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,817 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.