What airlines fly to Japan?

United Airlines, Delta and Japan 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 43% 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 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 November 2025.

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.

$362 Cheap Flights from St. Louis to Japan in 2025/26

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Cheap round-trip flights

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4:05 pm - 8:20 pmSTL-ITM

37h 15m2 stops

4:00 pm - 3:29 pmITM-STL

38h 29m2 stops

$684Air Canada

Find Deal

Tue, Feb 3 - Thu, Feb 19

4:05 pm - 7:25 pmSTL-KIX

36h 20m2 stops

3:45 pm - 3:29 pmKIX-STL

38h 44m2 stops

$687Air Canada

Find Deal

Tue, Feb 3 - Thu, Feb 19

8:21 am - 7:25 pmSTL-KIX

44h 04m2 stops

8:20 am - 7:19 pmKIX-STL

25h 59m2 stops

$711United Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

6:45 pm - 6:10 pmSTL-ITM

56h 25m2 stops

1:00 pm - 9:00 pmITM-STL

23h 00m2 stops

$714United Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

6:00 am - 5:45 pmSTL-HND

20h 45m2 stops

4:50 pm - 11:29 pmHND-STL

21h 39m2 stops

$815Delta

Find Deal

Sun, Dec 7 - Sun, Dec 14

7:10 am - 5:45 pmSTL-HND

19h 35m2 stops

5:20 pm - 11:38 pmHND-STL

21h 18m2 stops

$816Delta

Find Deal

Thu, Feb 19 - Wed, Feb 25

6:00 am - 2:45 pmSTL-NRT

17h 45m1 stop

6:10 pm - 11:56 pmNRT-STL

20h 46m1 stop

$821Japan Airlines

Find Deal

Mon, Feb 9 - Mon, Feb 16

5:17 am - 3:30 pmSTL-NRT

19h 13m1 stop

5:30 pm - 10:47 pmNRT-STL

20h 17m1 stop

$840American Airlines

Find Deal

Tue, Nov 25 - Wed, Dec 10

6:30 am - 6:50 pmSTL-KIX

21h 20m1 stop

5:50 pm - 11:48 pmKIX-STL

20h 58m1 stop

$841American Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

6:00 am - 8:25 amSTL-KIX

35h 25m2 stops

5:50 pm - 11:48 pmKIX-STL

20h 58m1 stop

$852Japan Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

Japan Airlines flights from St. Louis to Japan

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

Japan Airlines

Feb 9

STL6:00 amLambert-St Louis

17h 45m

1 stop

NRT2:45 pmTokyo Narita

Feb 16

NRT6:10 pmTokyo Narita

20h 46m

1 stop

STL11:56 pmLambert-St Louis

$821

Find similar

Japan Airlines

Feb 15

STL6:00 amLambert-St Louis

35h 25m

2 stops

KIX8:25 amOsaka Kansai Intl

Feb 28

KIX5:50 pmOsaka Kansai Intl

20h 58m

1 stop

STL11:48 pmLambert-St Louis

$852

Find similar

Japan Airlines

Nov 9

STL2:17 pmLambert-St Louis

27h 43m

2 stops

FUK9:00 amFukuoka

Nov 11

FUK9:05 pmFukuoka

31h 00m

2 stops

STL1:05 pmLambert-St Louis

$924

Find similar

American Airlines flights from St. Louis to Japan

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

American Airlines

Nov 25

STL5:17 amLambert-St Louis

19h 13m

1 stop

NRT3:30 pmTokyo Narita

Dec 10

NRT5:30 pmTokyo Narita

20h 17m

1 stop

STL10:47 pmLambert-St Louis

$840

Find similar

American Airlines

Feb 15

STL6:30 amLambert-St Louis

21h 20m

1 stop

KIX6:50 pmOsaka Kansai Intl

Feb 28

KIX5:50 pmOsaka Kansai Intl

20h 58m

1 stop

STL11:48 pmLambert-St Louis

$841

Find similar

American Airlines

Feb 15

STL6:30 amLambert-St Louis

21h 20m

1 stop

KIX6:50 pmOsaka Kansai Intl

Feb 28

KIX5:50 pmOsaka Kansai Intl

20h 58m

1 stop

STL11:48 pmLambert-St Louis

$850

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

4:05 pm-8:20 pm

2 stops37h 15m

Osaka Itami

Thu 2/19

4:00 pm-3:29 pm

2 stops38h 29m

$684

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

4:05 pm-7:25 pm

2 stops36h 20m

Osaka Kansai Intl

Thu 2/19

3:45 pm-3:29 pm

2 stops38h 44m

$687

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

8:21 am-7:25 pm

2 stops44h 04m

Osaka Kansai Intl

Sat 2/28

8:20 am-7:19 pm

2 stops25h 59m

$711

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

6:45 pm-6:10 pm

2 stops56h 25m

Osaka Itami

Sat 2/28

1:00 pm-9:00 pm

2 stops23h 00m

$714

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 12/7

6:00 am-5:45 pm

2 stops20h 45m

Tokyo Haneda

Sun 12/14

4:50 pm-11:29 pm

2 stops21h 39m

$815

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Thu 2/19

7:10 am-5:45 pm

2 stops19h 35m

Tokyo Haneda

Wed 2/25

5:20 pm-11:38 pm

2 stops21h 18m

$816

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/9

6:00 am-2:45 pm

1 stop17h 45m

Tokyo Narita

Mon 2/16

6:10 pm-11:56 pm

1 stop20h 46m

$821

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 11/25

5:17 am-3:30 pm

1 stop19h 13m

Tokyo Narita

Wed 12/10

5:30 pm-10:47 pm

1 stop20h 17m

$840

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:30 am-6:50 pm

1 stop21h 20m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:48 pm

1 stop20h 58m

$841

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:00 am-8:25 am

2 stops35h 25m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:48 pm

1 stop20h 58m

$852

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 $735. 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 $775.

What is the cheapest day to depart on your flight to Japan?

On average, the least expensive day to fly to Japan from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $1,209. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Japan on a Friday will generally be more expensive and average around $1,457. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Japan?

Flying to Japan from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,103 when looking at flights departing at noon. In the morning is when there is more demand to fly to Japan, so prices are often more expensive at around $1,308 per ticket.

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

You could potentially save up to 5% 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

Direct flights	None

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 November 2025.
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
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,427 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,003 reviews	Search ANA flights
Japan Airlines	PriceFrom $703	Free Cancellation	Rating 8.3 1,607 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 9,010 reviews	Search United Airlines flights
Delta	PriceFrom $722	Free Cancellation	Rating 7.9 8,003 reviews	Search Delta 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.

An easier way to manage your Japan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Japan

Popular cities in Japan

Flights to Tokyofrom $393

Flights to Osakafrom $503

Flights to Okinawafrom $589

Flights to Fukuokafrom $585

Flights to Nagoyafrom $590

Flights to Hiroshimafrom $632

Flights to Ishigakifrom $736

Flights to Kagoshimafrom $731

Flights to Hakodatefrom $950

Flights to Miyakojimafrom $2,116

Flights to Toyamafrom $769

Flights to Sendaifrom $662

Cheap flights from St. Louis to Japan from $362

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Japan departing on 2/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from St. Louis to Japan

Cheap round-trip flights

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Cheap last minute flights

Japan Airlines flights from St. Louis to Japan

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

American Airlines flights from St. Louis to Japan

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

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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

What is the cheapest month to fly to Japan?

What is the cheapest day to depart on your flight to Japan?

What is the cheapest time of day to depart on your flight to Japan?

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

You could potentially save up to 5% on your flight if you consider stops on a St. Louis to Japan flight.

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

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

What airlines fly to Japan?

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

Direct flights

When did momondo last update prices for flights from Lambert-St Louis Airport to Japan?

How many operators does momondo search for flights from Lambert-St Louis Airport to Japan?

How old do you have to be to fly from Lambert-St Louis Airport to Japan?

What documentation or ID do you need to fly to Japan?

Best airlines flying from St. Louis to Japan

Compare and see reviews for airlines that fly from St. Louis to Japan with momondo

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Japan?

Can I find flights from St. Louis to Japan with flexible booking policies on momondo?

How can momondo help me find flights from St. Louis to Japan?

I’m not ready to book a flight from St. Louis to Japan right now. Can momondo alert me if prices change?

An easier way to manage your Japan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Japan

Popular cities in Japan

Popular flights according to clicks in the last 7 days on momondo