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?

United Airlines, ANA, and American 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 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.

$520 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.

8:50 am - 6:55 pm

STL

ITM

20h 05m

2 stops

7:30 am - 2:15 pm

ITM

STL

20h 45m

2 stops

$888ANA

Sun, Sep 13 - Wed, Sep 23

8:50 am - 9:15 pm

STL

HND

22h 25m

1 stop

5:15 pm - 11:57 am

HND

STL

32h 42m

1 stop

$895ANA

Wed, Sep 9 - Wed, Sep 16

7:00 am - 2:20 pm

STL

HND

17h 20m

1 stop

11:55 am - 11:40 pm

HND

STL

25h 45m

1 stop

$897American Airlines

Wed, Sep 9 - Wed, Sep 23

6:15 am - 2:00 pm

STL

NRT

17h 45m

1 stop

4:30 pm - 4:34 pm

NRT

STL

14h 04m

1 stop

$898United Airlines

Tue, Sep 1 - Fri, Sep 11

7:00 am - 2:15 pm

STL

HND

17h 15m

1 stop

6:25 pm - 8:35 pm

HND

STL

16h 10m

1 stop

$898Delta

Tue, Sep 1 - Tue, Sep 8

5:10 am - 2:50 pm

STL

KIX

19h 40m

2 stops

4:55 pm - 6:39 pm

KIX

STL

15h 44m

1 stop

$901United Airlines

Sun, Sep 13 - Wed, Sep 23

5:00 am - 2:20 pm

STL

HND

19h 20m

2 stops

11:55 am - 4:40 pm

HND

STL

18h 45m

2 stops

$901American Airlines

Wed, Sep 9 - Wed, Sep 23

8:15 pm - 7:15 pm

STL

HND

32h 00m

2 stops

9:55 pm - 6:38 pm

HND

STL

35h 43m

2 stops

$903United Airlines

Sun, Nov 1 - Thu, Nov 12

6:30 am - 8:30 pm

STL

ITM

24h 00m

2 stops

2:20 pm - 11:40 pm

ITM

STL

23h 20m

2 stops

$1,155Japan Airlines

Tue, Sep 15 - Tue, Sep 22

6:55 am - 9:15 pm

STL

HIJ

24h 20m

2 stops

7:35 am - 4:24 pm

HIJ

STL

22h 49m

2 stops

$1,432Japan Airlines

Wed, Jul 29 - Wed, Aug 5

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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

18h 15m

1 stop

HND2:15 pmTokyo Haneda

Sep 11

HND4:05 pmTokyo Haneda

14h 42m

1 stop

STL4:47 pmLambert-St Louis

$898

Delta

Aug 9

STL7:00 amLambert-St Louis

17h 15m

1 stop

HND2:15 pmTokyo Haneda

Sep 23

HND6:25 pmTokyo Haneda

16h 10m

1 stop

STL8:35 pmLambert-St Louis

$993

Delta

Aug 11

STL10:33 amLambert-St Louis

15h 42m

1 stop

HND4:15 pmTokyo Haneda

Sep 23

HND6:25 pmTokyo Haneda

19h 11m

2 stops

STL11:36 pmLambert-St Louis

$998

United Airlines flights from St. Louis to Japan

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

United Airlines

Sep 1

STL6:15 amLambert-St Louis

17h 45m

1 stop

NRT2:00 pmTokyo Narita

Sep 11

NRT4:30 pmTokyo Narita

14h 04m

1 stop

STL4:34 pmLambert-St Louis

$898

United Airlines

Sep 13

STL5:10 amLambert-St Louis

19h 40m

2 stops

KIX2:50 pmOsaka Kansai Intl

Sep 23

KIX4:55 pmOsaka Kansai Intl

15h 44m

1 stop

STL6:39 pmLambert-St Louis

$901

United Airlines

Nov 1

STL8:15 pmLambert-St Louis

32h 00m

2 stops

HND7:15 pmTokyo Haneda

Nov 12

HND9:55 pmTokyo Haneda

35h 43m

2 stops

STL6:38 pmLambert-St Louis

$903

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 9/13

8:50 am-6:55 pm

2 stops20h 05m

Osaka Itami

Wed 9/23

7:30 am-2:15 pm

2 stops20h 45m

$888

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 9/9

8:50 am-9:15 pm

1 stop22h 25m

Tokyo Haneda

Wed 9/16

5:15 pm-11:57 am

1 stop32h 42m

$895

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 9/9

7:00 am-2:20 pm

1 stop17h 20m

Tokyo Haneda

Wed 9/23

11:55 am-11:40 pm

1 stop25h 45m

$897

Quickest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 9/1

6:15 am-2:00 pm

1 stop17h 45m

Tokyo Narita

Fri 9/11

4:30 pm-4:34 pm

1 stop14h 04m

$898

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/1

7:00 am-2:15 pm

1 stop17h 15m

Tokyo Haneda

Tue 9/8

6:25 pm-8:35 pm

1 stop16h 10m

$898

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 9/13

5:10 am-2:50 pm

2 stops19h 40m

Osaka Kansai Intl

Wed 9/23

4:55 pm-6:39 pm

1 stop15h 44m

$901

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 9/9

5:00 am-2:20 pm

2 stops19h 20m

Tokyo Haneda

Wed 9/23

11:55 am-4:40 pm

2 stops18h 45m

$901

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 11/1

8:15 pm-7:15 pm

2 stops32h 00m

Tokyo Haneda

Thu 11/12

9:55 pm-6:38 pm

2 stops35h 43m

$903

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:30 am-8:30 pm

2 stops24h 00m

Osaka Itami

Tue 9/22

2:20 pm-11:40 pm

2 stops23h 20m

$1,155

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Wed 7/29

6:55 am-9:15 pm

2 stops24h 20m

Hiroshima

Wed 8/5

7:35 am-4:24 pm

2 stops22h 49m

$1,432

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 $1,119 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 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	15h 37m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 37m

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 11,689 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,215 reviews	Search Air Canada flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.3 1,243 reviews	Search ANA flights
United Airlines	PriceFrom $708	Free Cancellation	Rating 7.4 9,860 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,410 reviews	Search Delta flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,841 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.