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 42% 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?

Alaska Airlines, 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 October 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.

$327 Cheap Flights from St. Louis to Japan in 2025/26

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Cheap round-trip flights

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3:23 pm - 4:00 pmSTL-NRT

33h 37m1 stop

6:30 pm - 11:59 pmNRT-STL

20h 29m1 stop

$691Alaska Airlines

Find Deal

Mon, Dec 8 - Wed, Dec 24

7:15 am - 3:30 pmSTL-NRT

17h 15m1 stop

5:30 pm - 10:24 pmNRT-STL

19h 54m1 stop

$698American Airlines

Find Deal

Wed, Jan 28 - Wed, Feb 18

6:00 am - 3:30 pmSTL-NRT

18h 30m1 stop

5:30 pm - 9:04 pmNRT-STL

18h 34m2 stops

$703United Airlines

Find Deal

Mon, Feb 9 - Fri, Feb 27

6:00 am - 3:30 pmSTL-NRT

18h 30m1 stop

5:30 pm - 9:04 pmNRT-STL

18h 34m2 stops

$730United Airlines

Find Deal

Wed, Jan 28 - Wed, Feb 18

2:20 pm - 2:05 pmSTL-HND

32h 45m2 stops

4:50 pm - 7:10 pmHND-STL

17h 20m2 stops

$746Delta

Find Deal

Sun, Dec 7 - Tue, Dec 16

6:00 am - 2:35 pmSTL-HND

17h 35m1 stop

8:00 pm - 11:40 pmHND-STL

18h 40m1 stop

$747Delta

Find Deal

Tue, Dec 9 - Fri, Jan 30

6:30 am - 4:20 pmSTL-NRT

42h 50m2 stops

6:15 pm - 10:45 pmNRT-STL

43h 30m2 stops

$760Air Canada

Find Deal

Sun, Nov 16 - Wed, Dec 10

6:43 pm - 4:30 pmSTL-NRT

30h 47m2 stops

6:45 pm - 3:40 pmNRT-STL

35h 55m2 stops

$766Air Canada

Find Deal

Tue, Nov 25 - Wed, Dec 10

6:10 am - 6:50 pmSTL-KIX

21h 40m1 stop

7:00 am - 11:10 amKIX-STL

19h 10m2 stops

$828Japan Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

6:10 am - 6:50 pmSTL-KIX

21h 40m1 stop

5:50 pm - 11:08 pmKIX-STL

20h 18m1 stop

$829Japan Airlines

Find Deal

Sun, Feb 15 - Sat, Feb 28

Alaska Airlines flights from St. Louis to Japan

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

Alaska Airlines

Dec 8

STL3:23 pmLambert-St Louis

33h 37m

1 stop

NRT4:00 pmTokyo Narita

Dec 24

NRT6:30 pmTokyo Narita

20h 29m

1 stop

STL11:59 pmLambert-St Louis

$691

Find similar

Alaska Airlines

Jan 6

STL5:26 pmLambert-St Louis

31h 34m

1 stop

NRT4:00 pmTokyo Narita

Jan 23

NRT6:30 pmTokyo Narita

19h 21m

1 stop

STL10:51 pmLambert-St Louis

$709

Find similar

Alaska Airlines

Mar 1

STL7:00 amLambert-St Louis

18h 00m

1 stop

NRT4:00 pmTokyo Narita

Mar 12

NRT6:30 pmTokyo Narita

19h 26m

1 stop

STL11:56 pmLambert-St Louis

$714

Find similar

American Airlines flights from St. Louis to Japan

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

American Airlines

Jan 28

STL7:15 amLambert-St Louis

17h 15m

1 stop

NRT3:30 pmTokyo Narita

Feb 18

NRT5:30 pmTokyo Narita

19h 54m

1 stop

STL10:24 pmLambert-St Louis

$698

Find similar

American Airlines

Jan 15

STL7:15 amLambert-St Louis

17h 15m

1 stop

NRT3:30 pmTokyo Narita

Jan 30

NRT5:30 pmTokyo Narita

16h 59m

1 stop

STL7:29 pmLambert-St Louis

$699

Find similar

American Airlines

Jan 15

STL7:15 amLambert-St Louis

17h 15m

1 stop

NRT3:30 pmTokyo Narita

Jan 30

NRT5:30 pmTokyo Narita

20h 29m

1 stop

STL10:59 pmLambert-St Louis

$700

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 12/8

3:23 pm-4:00 pm

1 stop33h 37m

Tokyo Narita

Wed 12/24

6:30 pm-11:59 pm

1 stop20h 29m

$691

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 1/28

7:15 am-3:30 pm

1 stop17h 15m

Tokyo Narita

Wed 2/18

5:30 pm-10:24 pm

1 stop19h 54m

$698

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/9

6:00 am-3:30 pm

1 stop18h 30m

Tokyo Narita

Fri 2/27

5:30 pm-9:04 pm

2 stops18h 34m

$703

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 1/28

6:00 am-3:30 pm

1 stop18h 30m

Tokyo Narita

Wed 2/18

5:30 pm-9:04 pm

2 stops18h 34m

$730

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 12/7

2:20 pm-2:05 pm

2 stops32h 45m

Tokyo Haneda

Tue 12/16

4:50 pm-7:10 pm

2 stops17h 20m

$746

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 12/9

6:00 am-2:35 pm

1 stop17h 35m

Tokyo Haneda

Fri 1/30

8:00 pm-11:40 pm

1 stop18h 40m

$747

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 11/16

6:30 am-4:20 pm

2 stops42h 50m

Tokyo Narita

Wed 12/10

6:15 pm-10:45 pm

2 stops43h 30m

$760

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 11/25

6:43 pm-4:30 pm

2 stops30h 47m

Tokyo Narita

Wed 12/10

6:45 pm-3:40 pm

2 stops35h 55m

$766

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

Sat 2/28

7:00 am-11:10 am

2 stops19h 10m

$828

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:08 pm

1 stop20h 18m

$829

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 $733. 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.

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 9% 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 October 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 10,293 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,039 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,578 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 984 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 8,975 reviews	Search United Airlines flights
Delta	PriceFrom $723	Free Cancellation	Rating 7.9 7,972 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 $343

Flights to Osakafrom $534

Flights to Okinawafrom $547

Flights to Fukuokafrom $535

Flights to Nagoyafrom $564

Flights to Hiroshimafrom $661

Flights to Ishigakifrom $745

Flights to Kagoshimafrom $745

Flights to Hakodatefrom $908

Flights to Nagasakifrom $745

Flights to Miyakojimafrom $2,105

Flights to Sendaifrom $809

Cheap flights from St. Louis to Japan from $327

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 1/25. 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

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Trusted and free

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Price Alerts

Find the cheapest flights from St. Louis to Japan

Cheap round-trip flights

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Cheap last minute flights

Alaska Airlines flights from St. Louis to Japan

Our best Alaska 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 9% 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?

Alaska Airlines, ANA, and United 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