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 47% 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, ANA, and United 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 January 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.

$349 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.

9:55 am - 4:20 pm

STL

NRT

39h 25m

2 stops

6:15 pm - 3:29 pm

NRT

STL

36h 14m

2 stops

$729Air Canada

Mon, Feb 23 - Thu, Mar 5

8:17 am - 9:05 pm

STL

HND

21h 48m

1 stop

6:20 pm - 7:14 pm

HND

STL

15h 54m

1 stop

$731ANA

Mon, Feb 23 - Thu, Mar 5

6:32 am - 5:45 pm

STL

HND

21h 13m

1 stop

8:00 pm - 11:58 pm

HND

STL

17h 58m

1 stop

$740Delta

Tue, Mar 10 - Tue, Mar 17

5:12 am - 3:30 pm

STL

NRT

19h 18m

1 stop

5:30 pm - 10:58 pm

NRT

STL

20h 28m

1 stop

$740American Airlines

Mon, Feb 23 - Thu, Mar 5

4:30 pm - 2:50 pm

STL

HND

31h 20m

2 stops

7:40 pm - 11:34 pm

HND

STL

17h 54m

2 stops

$743United Airlines

Sat, Feb 28 - Tue, Mar 10

4:30 pm - 3:00 pm

STL

NRT

31h 30m

2 stops

5:35 pm - 8:41 pm

NRT

STL

17h 06m

1 stop

$744United Airlines

Sat, Feb 28 - Tue, Mar 10

6:00 am - 5:45 pm

STL

HND

21h 45m

2 stops

5:20 pm - 11:25 pm

HND

STL

20h 05m

1 stop

$744Delta

Tue, Mar 10 - Tue, Mar 17

7:04 am - 3:05 pm

STL

HND

17h 01m

1 stop

8:25 pm - 11:59 pm

HND

STL

18h 34m

1 stop

$745American Airlines

Mon, Feb 9 - Fri, Feb 27

8:00 am - 7:55 pm

STL

ITM

20h 55m

2 stops

8:30 am - 1:50 pm

ITM

STL

20h 20m

2 stops

$903Japan Airlines

Sun, Feb 15 - Sat, Feb 28

7:00 am - 8:25 am

STL

KIX

34h 25m

2 stops

7:00 am - 1:50 pm

KIX

STL

21h 50m

2 stops

$925Japan Airlines

Sun, Feb 15 - Sat, Feb 28

United Airlines flights from St. Louis to Japan

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

United Airlines

Feb 28

STL4:30 pmLambert-St Louis

31h 20m

2 stops

HND2:50 pmTokyo Haneda

Mar 10

HND6:25 pmTokyo Haneda

19h 26m

1 stop

STL11:51 pmLambert-St Louis

$743

United Airlines

Mar 10

STL5:15 amLambert-St Louis

20h 05m

2 stops

NRT3:20 pmTokyo Narita

Mar 17

NRT5:00 pmTokyo Narita

20h 34m

2 stops

STL11:34 pmLambert-St Louis

$744

United Airlines

Feb 9

STL8:45 amLambert-St Louis

15h 55m

1 stop

NRT3:40 pmTokyo Narita

Feb 27

NRT5:45 pmTokyo Narita

19h 29m

1 stop

STL10:14 pmLambert-St Louis

$746

ANA flights from St. Louis to Japan

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

ANA

Feb 23

STL8:17 amLambert-St Louis

21h 48m

1 stop

HND9:05 pmTokyo Haneda

Mar 5

HND6:20 pmTokyo Haneda

15h 54m

1 stop

STL7:14 pmLambert-St Louis

$731

ANA

Feb 8

STL6:30 amLambert-St Louis

20h 15m

1 stop

HND5:45 pmTokyo Haneda

Feb 24

HND6:20 pmTokyo Haneda

15h 54m

1 stop

STL7:14 pmLambert-St Louis

$738

ANA

Jan 28

STL6:30 amLambert-St Louis

20h 15m

1 stop

HND5:45 pmTokyo Haneda

Jan 30

HND6:20 pmTokyo Haneda

16h 07m

1 stop

STL7:27 pmLambert-St Louis

$759

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/23

9:55 am-4:20 pm

2 stops39h 25m

Tokyo Narita

Thu 3/5

6:15 pm-3:29 pm

2 stops36h 14m

$729

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/23

8:17 am-9:05 pm

1 stop21h 48m

Tokyo Haneda

Thu 3/5

6:20 pm-7:14 pm

1 stop15h 54m

$731

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 3/10

6:32 am-5:45 pm

1 stop21h 13m

Tokyo Haneda

Tue 3/17

8:00 pm-11:58 pm

1 stop17h 58m

$740

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/23

5:12 am-3:30 pm

1 stop19h 18m

Tokyo Narita

Thu 3/5

5:30 pm-10:58 pm

1 stop20h 28m

$740

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sat 2/28

4:30 pm-2:50 pm

2 stops31h 20m

Tokyo Haneda

Tue 3/10

7:40 pm-11:34 pm

2 stops17h 54m

$743

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 2/28

4:30 pm-3:00 pm

2 stops31h 30m

Tokyo Narita

Tue 3/10

5:35 pm-8:41 pm

1 stop17h 06m

$744

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 3/10

6:00 am-5:45 pm

2 stops21h 45m

Tokyo Haneda

Tue 3/17

5:20 pm-11:25 pm

1 stop20h 05m

$744

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/9

7:04 am-3:05 pm

1 stop17h 01m

Tokyo Haneda

Fri 2/27

8:25 pm-11:59 pm

1 stop18h 34m

$745

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

8:00 am-7:55 pm

2 stops20h 55m

Osaka Itami

Sat 2/28

8:30 am-1:50 pm

2 stops20h 20m

$903

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

7:00 am-8:25 am

2 stops34h 25m

Osaka Kansai Intl

Sat 2/28

7:00 am-1:50 pm

2 stops21h 50m

$925

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 September is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $747. If you aren’t able to travel to Japan during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $793.

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

You could potentially save up to 27% 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 14m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 14m

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 January 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 7.2 11,189 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,656 reviews	Search Air Canada flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,691 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,078 reviews	Search ANA flights
Delta	PriceFrom $711	Free Cancellation	Rating 7.9 8,113 reviews	Search Delta flights
United Airlines	PriceFrom $738	Free Cancellation	Rating 7.4 9,198 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.