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

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

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 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.

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 August 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.

$329 Cheap Flights from St. Louis to Japan in 2025

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Find the cheapest flights from St. Louis to Japan

Round-trip

One-way

Last minute

Cheap round-trip flights

5:15 am - 3:00 pmSTL-NRT

19h 45m1 stop

6:30 pm - 8:15 pmNRT-STL

15h 45m1 stop

$633American Airlines

Find Deal

Mon, Sep 1 - Tue, Sep 9

6:10 am - 3:00 pmSTL-NRT

18h 50m2 stops

6:30 pm - 10:50 pmNRT-STL

18h 20m1 stop

$638American Airlines

Find Deal

Tue, Sep 9 - Wed, Sep 17

5:18 pm - 4:40 pmSTL-HND

32h 22m2 stops

6:50 pm - 12:20 pmHND-STL

32h 30m2 stops

$643Air Canada

Find Deal

Wed, Jan 7 - Wed, Jan 21

5:18 pm - 4:30 pmSTL-NRT

32h 12m2 stops

6:45 pm - 12:20 pmNRT-STL

32h 35m2 stops

$644Air Canada

Find Deal

Wed, Jan 7 - Wed, Jan 21

5:15 am - 2:50 pmSTL-KIX

19h 35m2 stops

4:50 pm - 11:58 pmKIX-STL

21h 08m2 stops

$701United Airlines

Find Deal

Tue, Sep 16 - Wed, Oct 1

5:49 pm - 2:50 pmSTL-KIX

31h 01m1 stop

8:30 am - 6:17 pmKIX-STL

23h 47m2 stops

$707United Airlines

Find Deal

Tue, Sep 16 - Wed, Oct 1

5:57 am - 2:45 pmSTL-NRT

17h 48m1 stop

6:10 pm - 11:56 pmNRT-STL

20h 46m1 stop

$715Japan Airlines

Find Deal

Mon, Feb 9 - Fri, Feb 27

7:00 am - 3:40 pmSTL-NRT

17h 40m1 stop

5:10 pm - 11:08 pmNRT-STL

20h 58m1 stop

$716Japan Airlines

Find Deal

Thu, Feb 12 - Thu, Feb 19

7:00 am - 4:15 pmSTL-HND

19h 15m2 stops

3:15 pm - 10:02 pmHND-STL

20h 47m2 stops

$738Delta

Find Deal

Mon, Sep 1 - Wed, Sep 10

5:11 pm - 2:20 pmSTL-HND

31h 09m1 stop

3:15 pm - 8:34 pmHND-STL

19h 19m1 stop

$739Delta

Find Deal

Sat, Sep 13 - Wed, Sep 17

Japan Airlines flights from St. Louis to Japan

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

Japan Airlines

Feb 9

STL5:57 amLambert-St Louis

17h 48m

1 stop

NRT2:45 pmTokyo Narita

Feb 27

NRT6:10 pmTokyo Narita

20h 46m

1 stop

STL11:56 pmLambert-St Louis

$715

Find similar

Japan Airlines

Feb 12

STL7:00 amLambert-St Louis

17h 40m

1 stop

NRT3:40 pmTokyo Narita

Feb 19

NRT5:10 pmTokyo Narita

20h 58m

1 stop

STL11:08 pmLambert-St Louis

$716

Find similar

Japan Airlines

Nov 18

STL7:00 amLambert-St Louis

20h 50m

1 stop

KIX6:50 pmOsaka Kansai Intl

Dec 5

KIX6:45 amOsaka Kansai Intl

22h 50m

2 stops

STL2:35 pmLambert-St Louis

$746

Find similar

ANA flights from St. Louis to Japan

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

ANA

Aug 27

STL9:17 amLambert-St Louis

23h 58m

2 stops

OKA11:15 pmOkinawa Naha

Sep 3

OKA12:00 pmOkinawa Naha

20h 23m

2 stops

STL6:23 pmLambert-St Louis

$723

Find similar

ANA

Sep 9

STL8:10 amLambert-St Louis

17h 45m

1 stop

HND3:55 pmTokyo Haneda

Sep 18

HND5:15 pmTokyo Haneda

15h 08m

1 stop

STL6:23 pmLambert-St Louis

$725

Find similar

ANA

Sep 15

STL8:10 amLambert-St Louis

24h 10m

2 stops

KIX10:20 pmOsaka Kansai Intl

Oct 2

KIX6:45 amOsaka Kansai Intl

19h 43m

2 stops

STL12:28 pmLambert-St Louis

$728

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/1

5:15 am-3:00 pm

1 stop19h 45m

Tokyo Narita

Tue 9/9

6:30 pm-8:15 pm

1 stop15h 45m

$633

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 9/9

6:10 am-3:00 pm

2 stops18h 50m

Tokyo Narita

Wed 9/17

6:30 pm-10:50 pm

1 stop18h 20m

$638

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 1/7

5:18 pm-4:40 pm

2 stops32h 22m

Tokyo Haneda

Wed 1/21

6:50 pm-12:20 pm

2 stops32h 30m

$643

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 1/7

5:18 pm-4:30 pm

2 stops32h 12m

Tokyo Narita

Wed 1/21

6:45 pm-12:20 pm

2 stops32h 35m

$644

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/16

5:15 am-2:50 pm

2 stops19h 35m

Osaka Kansai Intl

Wed 10/1

4:50 pm-11:58 pm

2 stops21h 08m

$701

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/16

5:49 pm-2:50 pm

1 stop31h 01m

Osaka Kansai Intl

Wed 10/1

8:30 am-6:17 pm

2 stops23h 47m

$707

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/9

5:57 am-2:45 pm

1 stop17h 48m

Tokyo Narita

Fri 2/27

6:10 pm-11:56 pm

1 stop20h 46m

$715

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 2/12

7:00 am-3:40 pm

1 stop17h 40m

Tokyo Narita

Thu 2/19

5:10 pm-11:08 pm

1 stop20h 58m

$716

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 9/1

7:00 am-4:15 pm

2 stops19h 15m

Tokyo Haneda

Wed 9/10

3:15 pm-10:02 pm

2 stops20h 47m

$738

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sat 9/13

5:11 pm-2:20 pm

1 stop31h 09m

Tokyo Haneda

Wed 9/17

3:15 pm-8:34 pm

1 stop19h 19m

$739

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 $813. 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 $832.

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 4% 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

Best Price Found	$329
Fastest flight time	15h 40m
Direct flights	None
Airports in Japan	4 airports

The best one-way flight to Japan from St. Louis in the past 72 hours is $329. The best round-trip flight deal from St. Louis to Japan found on momondo in the last 72 hours is $633.

The fastest flight from St. Louis to Japan takes 15h 40m

There are no direct flights from St. Louis to Japan. Popular non-direct routes for this connection are Lambert-St Louis Airport - Tokyo Haneda Airport, Lambert-St Louis Airport - Tokyo Narita Airport and Lambert-St Louis Airport - Osaka Itami Airport.

There are 4 airports near Japan: Tokyo Narita (NRT), Osaka Itami (ITM), Osaka Kansai Intl (KIX), Tokyo Haneda (HND)

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 August 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 9,977 reviews	Search Air Canada flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,548 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 933 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 8,919 reviews	Search United Airlines flights
American Airlines	PriceFrom $716	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $723	Free Cancellation	Rating 8.0 7,986 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 $491

Flights to Osakafrom $529

Flights to Okinawafrom $528

Flights to Fukuokafrom $523

Flights to Nagoyafrom $527

Flights to Hiroshimafrom $659

Flights to Ishigakifrom $753

Flights to Nagasakifrom $665

Flights to Kagoshimafrom $762

Flights to Hakodatefrom $717

Flights to Toyamafrom $779

Flights to Miyakojimafrom $1,604

Cheap flights from St. Louis to Japan from $329

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 9/28. 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

Cheap one-way flights

Cheap last minute flights

Japan Airlines flights from St. Louis to Japan

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

ANA flights from St. Louis to Japan

Our best ANA 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 4% 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?

American Airlines, Air Canada, and Alaska 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

Best Price Found

Fastest flight time

Direct flights

Airports in Japan

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