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 34% 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?

Air Canada, United Airlines, and Delta 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 June 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.

$458 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.

3:04 pm - 4:00 pm

STL

NRT

34h 56m

1 stop

6:00 pm - 11:59 pm

NRT

STL

19h 59m

1 stop

$887Multiple Airlines

Tue, Sep 1 - Thu, Sep 10

8:50 am - 8:35 pm

STL

ITM

21h 45m

2 stops

12:00 pm - 7:27 pm

ITM

STL

21h 27m

2 stops

$888ANA

Tue, Sep 1 - Tue, Sep 8

5:30 pm - 2:00 pm

STL

NRT

30h 30m

2 stops

4:30 pm - 8:36 pm

NRT

STL

18h 06m

1 stop

$903United Airlines

Tue, Sep 22 - Wed, Oct 7

6:00 am - 4:15 pm

STL

HND

20h 15m

2 stops

4:05 pm - 8:31 pm

HND

STL

18h 26m

2 stops

$903Delta

Tue, Sep 1 - Thu, Sep 10

8:15 pm - 3:15 pm

STL

NRT

28h 00m

1 stop

6:00 pm - 12:34 am

NRT

STL

21h 34m

1 stop

$904United Airlines

Sun, Nov 1 - Tue, Nov 10

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 12:13 pm

NRT

STL

32h 23m

2 stops

$957Air Canada

Mon, Sep 28 - Tue, Oct 13

12:10 pm - 4:25 pm

STL

KIX

38h 15m

2 stops

6:00 pm - 6:41 pm

KIX

STL

38h 41m

2 stops

$963Air Canada

Tue, Sep 15 - Tue, Sep 22

6:30 am - 4:15 pm

STL

HND

19h 45m

1 stop

3:15 pm - 11:36 pm

HND

STL

22h 21m

1 stop

$998Delta

Mon, Sep 7 - Mon, Sep 14

6:00 am - 3:45 pm

STL

OKJ

43h 45m

2 stops

5:30 pm - 10:59 pm

OKJ

STL

43h 29m

2 stops

$1,592Japan Airlines

Sat, Aug 29 - Wed, Sep 2

6:00 am - 9:30 pm

STL

TAK

25h 30m

2 stops

9:45 am - 10:59 pm

TAK

STL

27h 14m

2 stops

$1,680Japan Airlines

Thu, Aug 27 - Mon, Aug 31

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American Airlines flights from St. Louis to Japan

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

American Airlines

Sep 1

STL6:00 amLambert-St Louis

19h 50m

1 stop

HND3:50 pmTokyo Haneda

Sep 10

HND4:30 pmTokyo Haneda

19h 27m

1 stop

STL9:57 pmLambert-St Louis

$897

American Airlines

Sep 22

STL5:43 amLambert-St Louis

19h 17m

1 stop

NRT3:00 pmTokyo Narita

Oct 7

NRT6:30 pmTokyo Narita

19h 11m

1 stop

STL11:41 pmLambert-St Louis

$898

American Airlines

Sep 1

STL5:42 amLambert-St Louis

20h 08m

2 stops

HND3:50 pmTokyo Haneda

Sep 10

HND4:30 pmTokyo Haneda

15h 33m

1 stop

STL6:03 pmLambert-St Louis

$901

Delta flights from St. Louis to Japan

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

Delta

Sep 1

STL6:00 amLambert-St Louis

20h 15m

2 stops

HND4:15 pmTokyo Haneda

Sep 10

HND4:05 pmTokyo Haneda

18h 26m

2 stops

STL8:31 pmLambert-St Louis

$903

Delta

Sep 7

STL6:30 amLambert-St Louis

19h 45m

1 stop

HND4:15 pmTokyo Haneda

Sep 14

HND3:15 pmTokyo Haneda

22h 21m

1 stop

STL11:36 pmLambert-St Louis

$998

Delta

Sep 7

STL6:00 amLambert-St Louis

20h 15m

2 stops

HND4:15 pmTokyo Haneda

Sep 14

HND3:15 pmTokyo Haneda

22h 21m

1 stop

STL11:36 pmLambert-St Louis

$1,003

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 9/1

3:04 pm-4:00 pm

1 stop34h 56m

Tokyo Narita

Thu 9/10

6:00 pm-11:59 pm

1 stop19h 59m

$887

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/1

8:50 am-8:35 pm

2 stops21h 45m

Osaka Itami

Tue 9/8

12:00 pm-7:27 pm

2 stops21h 27m

$888

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 9/22

5:30 pm-2:00 pm

2 stops30h 30m

Tokyo Narita

Wed 10/7

4:30 pm-8:36 pm

1 stop18h 06m

$903

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/1

6:00 am-4:15 pm

2 stops20h 15m

Tokyo Haneda

Thu 9/10

4:05 pm-8:31 pm

2 stops18h 26m

$903

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 11/1

8:15 pm-3:15 pm

1 stop28h 00m

Tokyo Narita

Tue 11/10

6:00 pm-12:34 am

1 stop21h 34m

$904

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/28

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Tue 10/13

5:50 pm-12:13 pm

2 stops32h 23m

$957

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

$963

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 9/7

6:30 am-4:15 pm

1 stop19h 45m

Tokyo Haneda

Mon 9/14

3:15 pm-11:36 pm

1 stop22h 21m

$998

St. LouisOkayama

STL - OKJ

STLOKJ

Lambert-St Louis

Sat 8/29

6:00 am-3:45 pm

2 stops43h 45m

Okayama

Wed 9/2

5:30 pm-10:59 pm

2 stops43h 29m

$1,592

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Thu 8/27

6:00 am-9:30 pm

2 stops25h 30m

Takamatsu

Mon 8/31

9:45 am-10:59 pm

2 stops27h 14m

$1,680

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 $1,112 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 $734 on momondo.

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

You could potentially save up to 14% 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 30m
Direct flights	None

The fastest flight from St. Louis to Japan takes 16h 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 June 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 11,651 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 11,176 reviews	Search Air Canada flights
United Airlines	PriceFrom $708	Free Cancellation	Rating 7.4 9,819 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.9 8,405 reviews	Search Delta flights
ANA	PriceFrom $777	Free Cancellation	Rating 8.3 1,235 reviews	Search ANA flights
Japan Airlines	PriceFrom $813	Free Cancellation	Rating 8.3 1,837 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.