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

Air Canada, United Airlines, and ANA are the most popular carriers operating from Lambert-St Louis to Japan

What airlines fly to Japan?

United Airlines, Delta and ANA 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 31% 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 July 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.

$379 Cheap Flights from St. Louis to Japan in 2026

Discover deals from 900+ travel sites with momondo.

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.

5:30 pm - 2:55 pm

STL

NRT

31h 25m

2 stops

5:50 pm - 11:57 am

NRT

STL

32h 07m

2 stops

$908Air Canada

Wed, Sep 9 - Wed, Sep 16

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

1 stop

$911Air Canada

Mon, Sep 7 - Mon, Sep 14

12:10 pm - 4:25 pm

STL

KIX

38h 15m

2 stops

6:00 pm - 6:41 pm

KIX

STL

38h 41m

2 stops

$914Air Canada

Tue, Sep 15 - Tue, Sep 22

7:20 pm - 2:35 pm

STL

HND

28h 15m

2 stops

5:15 pm - 4:54 pm

HND

STL

14h 39m

1 stop

$1,025Delta

Mon, Nov 2 - Tue, Nov 10

8:00 am - 8:35 pm

STL

ITM

22h 35m

2 stops

12:00 pm - 6:16 pm

ITM

STL

20h 16m

2 stops

$1,093ANA

Tue, Sep 15 - Tue, Sep 22

8:55 am - 6:55 pm

STL

ITM

20h 00m

2 stops

12:50 pm - 8:20 pm

ITM

STL

21h 30m

2 stops

$1,137ANA

Tue, Aug 11 - Mon, Sep 28

1:00 pm - 5:30 pm

STL

FUK

62h 30m

2 stops

12:15 pm - 11:57 am

FUK

STL

37h 42m

2 stops

$1,172United Airlines

Wed, Sep 2 - Wed, Sep 9

6:30 am - 7:50 pm

STL

ITM

23h 20m

2 stops

11:25 am - 11:30 pm

ITM

STL

26h 05m

2 stops

$1,277Japan Airlines

Tue, Sep 15 - Tue, Sep 22

8:00 am - 5:35 pm

STL

FUK

43h 35m

2 stops

12:25 pm - 10:30 pm

FUK

STL

48h 05m

3 stops

$1,279United Airlines

Thu, Oct 8 - Wed, Oct 21

6:29 am - 7:50 pm

STL

TAK

23h 21m

2 stops

8:40 pm - 4:48 pm

TAK

STL

34h 08m

2 stops

$2,199Japan Airlines

Sun, Sep 13 - Thu, Sep 17

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Qatar Airways flights from St. Louis to Japan

Our best Qatar Airways deals on St. Louis to Japan flight tickets

Qatar Airways

Aug 25

STL6:00 amLambert-St Louis

60h 10m

3 stops

FUK8:10 amFukuoka

Sep 1

FUK7:10 pmFukuoka

39h 16m

3 stops

STL8:26 pmLambert-St Louis

$1,915

Qatar Airways

Jul 13

STL9:39 amLambert-St Louis

56h 31m

3 stops

FUK8:10 amFukuoka

Jul 19

FUK6:10 pmFukuoka

39h 11m

3 stops

STL7:21 pmLambert-St Louis

$2,089

American Airlines flights from St. Louis to Japan

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

American Airlines

Sep 7

STL6:36 amLambert-St Louis

17h 44m

1 stop

HND2:20 pmTokyo Haneda

Sep 14

HND4:30 pmTokyo Haneda

16h 37m

1 stop

STL7:07 pmLambert-St Louis

$1,119

American Airlines

Oct 28

STL6:04 amLambert-St Louis

23h 11m

2 stops

ITM7:15 pmOsaka Itami

Nov 11

ITM4:30 pmOsaka Itami

20h 59m

2 stops

STL10:29 pmLambert-St Louis

$1,135

American Airlines

Jul 14

STL5:32 amLambert-St Louis

19h 28m

1 stop

NRT3:00 pmTokyo Narita

Jul 16

NRT6:30 pmTokyo Narita

19h 22m

1 stop

STL11:52 pmLambert-St Louis

$1,210

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 9/9

5:30 pm-2:55 pm

2 stops31h 25m

Tokyo Narita

Wed 9/16

5:50 pm-11:57 am

2 stops32h 07m

$908

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/7

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Mon 9/14

5:50 pm-6:41 pm

1 stop38h 51m

$911

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

$914

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 11/2

7:20 pm-2:35 pm

2 stops28h 15m

Tokyo Haneda

Tue 11/10

5:15 pm-4:54 pm

1 stop14h 39m

$1,025

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

8:00 am-8:35 pm

2 stops22h 35m

Osaka Itami

Tue 9/22

12:00 pm-6:16 pm

2 stops20h 16m

$1,093

Quickest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 8/11

8:55 am-6:55 pm

2 stops20h 00m

Osaka Itami

Mon 9/28

12:50 pm-8:20 pm

2 stops21h 30m

$1,137

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Wed 9/2

1:00 pm-5:30 pm

2 stops62h 30m

Fukuoka

Wed 9/9

12:15 pm-11:57 am

2 stops37h 42m

$1,172

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:30 am-7:50 pm

2 stops23h 20m

Osaka Itami

Tue 9/22

11:25 am-11:30 pm

2 stops26h 05m

$1,277

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Thu 10/8

8:00 am-5:35 pm

2 stops43h 35m

Fukuoka

Wed 10/21

12:25 pm-10:30 pm

3 stops48h 05m

$1,279

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Sun 9/13

6:29 am-7:50 pm

2 stops23h 21m

Takamatsu

Thu 9/17

8:40 pm-4:48 pm

2 stops34h 08m

$2,199

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.

How far in advance should I book a flight from St. Louis to Japan?

You are more likely to see cheaper flights to Japan from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Japan for around $1,138 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Japan from St. Louis for as low as $672 on momondo.

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 July 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 11,808 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,331 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 9,979 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,458 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,271 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,870 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.