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

Air Canada, United Airlines, and Asiana 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 37% 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 April 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.

12:10 pm - 4:25 pm

STL

KIX

38h 15m

2 stops

6:00 pm - 6:41 pm

KIX

STL

38h 41m

2 stops

$947Air 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

$952Air Canada

Tue, Sep 15 - Tue, Sep 22

9:16 am - 8:35 pm

STL

ITM

21h 19m

2 stops

8:00 am - 12:13 pm

ITM

STL

18h 13m

2 stops

$1,142ANA

Tue, Sep 15 - Tue, Sep 22

8:30 am - 7:50 pm

STL

ITM

21h 20m

2 stops

7:25 am - 2:25 pm

ITM

STL

21h 00m

2 stops

$1,161American Airlines

Tue, Sep 15 - Tue, Sep 22

8:30 am - 6:40 pm

STL

ITM

20h 10m

2 stops

7:05 am - 3:48 pm

ITM

STL

22h 43m

2 stops

$1,213Japan Airlines

Wed, Aug 5 - Fri, Aug 14

8:35 am - 8:25 pm

STL

ITM

21h 50m

2 stops

10:20 am - 3:48 pm

ITM

STL

19h 28m

2 stops

$1,223Japan Airlines

Wed, Aug 5 - Fri, Aug 14

6:01 am - 5:30 pm

STL

FUK

21h 29m

2 stops

12:15 pm - 10:59 pm

FUK

STL

48h 44m

2 stops

$1,252United Airlines

Wed, Jul 22 - Wed, Jul 29

6:01 am - 5:30 pm

STL

FUK

21h 29m

2 stops

12:15 pm - 8:41 am

FUK

STL

58h 26m

2 stops

$1,253United Airlines

Wed, Jul 22 - Wed, Jul 29

8:00 am - 6:10 pm

STL

ITM

20h 10m

2 stops

7:30 am - 12:13 pm

ITM

STL

18h 43m

2 stops

$1,281ANA

Tue, Sep 15 - Tue, Sep 22

8:25 am - 7:50 pm

STL

ITM

21h 25m

2 stops

8:20 am - 12:15 pm

ITM

STL

17h 55m

2 stops

$1,319American Airlines

Sun, Aug 2 - Sat, Aug 8

United Airlines flights from St. Louis to Japan

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

United Airlines

Aug 5

STL5:10 amLambert-St Louis

19h 40m

2 stops

KIX2:50 pmOsaka Kansai Intl

Aug 14

KIX4:55 pmOsaka Kansai Intl

20h 55m

2 stops

STL11:50 pmLambert-St Louis

$1,248

United Airlines

Jul 22

STL6:01 amLambert-St Louis

21h 29m

2 stops

FUK5:30 pmFukuoka

Jul 29

FUK12:15 pmFukuoka

48h 44m

2 stops

STL10:59 pmLambert-St Louis

$1,252

United Airlines

Jul 22

STL6:01 amLambert-St Louis

21h 29m

2 stops

FUK5:30 pmFukuoka

Jul 29

FUK12:15 pmFukuoka

58h 26m

2 stops

STL8:41 amLambert-St Louis

$1,253

American Airlines flights from St. Louis to Japan

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

American Airlines

Sep 15

STL8:30 amLambert-St Louis

21h 20m

2 stops

ITM7:50 pmOsaka Itami

Sep 22

ITM7:25 amOsaka Itami

21h 00m

2 stops

STL2:25 pmLambert-St Louis

$1,161

American Airlines

Apr 19

STL5:20 amLambert-St Louis

20h 30m

2 stops

HND3:50 pmTokyo Haneda

May 5

HND7:45 pmTokyo Haneda

17h 14m

2 stops

STL10:59 pmLambert-St Louis

$1,281

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

$1,318

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

$947

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

$952

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

9:16 am-8:35 pm

2 stops21h 19m

Osaka Itami

Tue 9/22

8:00 am-12:13 pm

2 stops18h 13m

$1,142

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

8:30 am-7:50 pm

2 stops21h 20m

Osaka Itami

Tue 9/22

7:25 am-2:25 pm

2 stops21h 00m

$1,161

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

8:30 am-6:40 pm

2 stops20h 10m

Osaka Itami

Fri 8/14

7:05 am-3:48 pm

2 stops22h 43m

$1,213

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 8/5

8:35 am-8:25 pm

2 stops21h 50m

Osaka Itami

Fri 8/14

10:20 am-3:48 pm

2 stops19h 28m

$1,223

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Wed 7/22

6:01 am-5:30 pm

2 stops21h 29m

Fukuoka

Wed 7/29

12:15 pm-10:59 pm

2 stops48h 44m

$1,252

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Wed 7/22

6:01 am-5:30 pm

2 stops21h 29m

Fukuoka

Wed 7/29

12:15 pm-8:41 am

2 stops58h 26m

$1,253

Quickest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

8:00 am-6:10 pm

2 stops20h 10m

Osaka Itami

Tue 9/22

7:30 am-12:13 pm

2 stops18h 43m

$1,281

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/2

8:25 am-7:50 pm

2 stops21h 25m

Osaka Itami

Sat 8/8

8:20 am-12:15 pm

2 stops17h 55m

$1,319

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 February is also cheap. Prices for this month can be found on momondo for an average of $773.

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

You could potentially save up to 30% 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 56m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 56m

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 April 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 11,572 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,922 reviews	Search Air Canada flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,171 reviews	Search ANA flights
Delta	PriceFrom $727	Free Cancellation	Rating 7.9 8,408 reviews	Search Delta flights
United Airlines	PriceFrom $747	Free Cancellation	Rating 7.4 9,581 reviews	Search United Airlines flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,779 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.