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

ANA, Air Canada, and Japan 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 44% 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 March 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.

$406 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.

12:10 pm - 4:25 pm

STL

KIX

38h 15m

2 stops

6:00 pm - 6:41 pm

KIX

STL

38h 41m

2 stops

$879Air Canada

Tue, Sep 15 - Tue, Sep 22

8:55 am - 4:25 pm

STL

KIX

17h 30m

1 stop

6:00 pm - 6:41 pm

KIX

STL

38h 41m

2 stops

$883Air Canada

Tue, Sep 15 - Tue, Sep 22

7:44 am - 5:30 pm

STL

HND

19h 46m

1 stop

5:25 pm - 11:05 pm

HND

STL

19h 40m

1 stop

$1,049Japan Airlines

Tue, Sep 22 - Wed, Oct 7

7:44 am - 5:30 pm

STL

HND

19h 46m

1 stop

5:25 pm - 11:05 pm

HND

STL

19h 40m

1 stop

$1,050Japan Airlines

Mon, Sep 21 - Tue, Oct 6

5:10 am - 5:05 pm

STL

ITM

45h 55m

3 stops

12:50 pm - 7:31 pm

ITM

STL

20h 41m

2 stops

$1,094United Airlines

Sun, Aug 30 - Wed, Sep 2

1:18 pm - 5:05 pm

STL

ITM

37h 47m

2 stops

12:50 pm - 9:22 pm

ITM

STL

22h 32m

2 stops

$1,099United Airlines

Sun, Aug 30 - Wed, Sep 2

9:23 am - 6:10 pm

STL

ITM

18h 47m

2 stops

12:50 pm - 12:13 pm

ITM

STL

37h 23m

2 stops

$1,122ANA

Wed, Aug 5 - Thu, Aug 13

9:16 am - 10:45 pm

STL

OKA

23h 29m

2 stops

10:55 am - 7:31 pm

OKA

STL

22h 36m

2 stops

$1,130ANA

Sun, Aug 30 - Sun, Sep 6

7:01 am - 10:30 pm

STL

OKA

25h 29m

2 stops

1:15 pm - 11:08 pm

OKA

STL

23h 53m

2 stops

$1,148American Airlines

Sun, Aug 30 - Sun, Sep 6

5:40 am - 6:25 pm

STL

OKA

22h 45m

2 stops

11:40 am - 7:46 pm

OKA

STL

22h 06m

2 stops

$1,198American Airlines

Thu, Sep 3 - Sun, Sep 20

ANA flights from St. Louis to Japan

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

ANA

Apr 26

STL4:05 pmLambert-St Louis

33h 20m

2 stops

NRT3:25 pmTokyo Narita

May 5

NRT5:35 pmTokyo Narita

16h 50m

1 stop

STL8:25 pmLambert-St Louis

$983

ANA

Aug 5

STL9:23 amLambert-St Louis

18h 47m

2 stops

ITM6:10 pmOsaka Itami

Aug 13

ITM12:50 pmOsaka Itami

37h 23m

2 stops

STL12:13 pmLambert-St Louis

$1,122

ANA

Aug 16

STL6:00 amLambert-St Louis

19h 25m

1 stop

HND3:25 pmTokyo Haneda

Aug 22

HND10:55 pmTokyo Haneda

25h 14m

2 stops

STL10:09 amLambert-St Louis

$1,149

American Airlines flights from St. Louis to Japan

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

American Airlines

Sep 6

STL8:35 amLambert-St Louis

18h 55m

1 stop

HND5:30 pmTokyo Haneda

Sep 13

HND4:30 pmTokyo Haneda

15h 44m

1 stop

STL6:14 pmLambert-St Louis

$1,139

American Airlines

Jul 22

STL7:06 amLambert-St Louis

23h 29m

2 stops

FUK8:35 pmFukuoka

Jul 29

FUK7:00 amFukuoka

19h 44m

2 stops

STL12:44 pmLambert-St Louis

$1,236

American Airlines

Aug 6

STL6:30 amLambert-St Louis

22h 15m

1 stop

KIX6:45 pmOsaka Kansai Intl

Aug 14

KIX5:45 pmOsaka Kansai Intl

19h 23m

1 stop

STL11:08 pmLambert-St Louis

$1,293

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$879

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

8:55 am-4:25 pm

1 stop17h 30m

Osaka Kansai Intl

Tue 9/22

6:00 pm-6:41 pm

2 stops38h 41m

$883

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/22

7:44 am-5:30 pm

1 stop19h 46m

Tokyo Haneda

Wed 10/7

5:25 pm-11:05 pm

1 stop19h 40m

$1,049

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 9/21

7:44 am-5:30 pm

1 stop19h 46m

Tokyo Haneda

Tue 10/6

5:25 pm-11:05 pm

1 stop19h 40m

$1,050

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/30

5:10 am-5:05 pm

3 stops45h 55m

Osaka Itami

Wed 9/2

12:50 pm-7:31 pm

2 stops20h 41m

$1,094

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/30

1:18 pm-5:05 pm

2 stops37h 47m

Osaka Itami

Wed 9/2

12:50 pm-9:22 pm

2 stops22h 32m

$1,099

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

9:23 am-6:10 pm

2 stops18h 47m

Osaka Itami

Thu 8/13

12:50 pm-12:13 pm

2 stops37h 23m

$1,122

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Sun 8/30

9:16 am-10:45 pm

2 stops23h 29m

Okinawa Naha

Sun 9/6

10:55 am-7:31 pm

2 stops22h 36m

$1,130

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Sun 8/30

7:01 am-10:30 pm

2 stops25h 29m

Okinawa Naha

Sun 9/6

1:15 pm-11:08 pm

2 stops23h 53m

$1,148

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 9/3

5:40 am-6:25 pm

2 stops22h 45m

Okinawa Naha

Sun 9/20

11:40 am-7:46 pm

2 stops22h 06m

$1,198

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 January is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $725. If you aren’t able to travel to Japan during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $765.

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

You could potentially save up to 26% 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	16h 25m
Direct flights	None

The fastest flight from St. Louis to Japan takes 16h 25m

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

Search flight deals

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 March 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 11,496 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,842 reviews	Search Air Canada flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,145 reviews	Search ANA flights
Japan Airlines	PriceFrom $709	Free Cancellation	Rating 8.3 1,750 reviews	Search Japan Airlines flights
Delta	PriceFrom $727	Free Cancellation	Rating 7.9 8,336 reviews	Search Delta flights
United Airlines	PriceFrom $747	Free Cancellation	Rating 7.4 9,488 reviews	Search United 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.