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

Hawaiian Airlines, Alaska Airlines, and Air Canada 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 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.

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 September 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.

$324 Cheap Flights from St. Louis to Japan in 2025/26

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Find the cheapest flights from St. Louis to Japan

Round-trip

One-way

Last minute

Cheap round-trip flights

6:00 am - 3:05 pmSTL-HND

18h 05m1 stop

1:05 pm - 11:08 pmHND-STL

25h 03m1 stop

$658American Airlines

Find Deal

Fri, Feb 6 - Thu, Feb 19

6:10 am - 3:05 pmSTL-HND

17h 55m1 stop

6:05 pm - 10:24 pmHND-STL

19h 19m1 stop

$659American Airlines

Find Deal

Mon, Feb 16 - Mon, Feb 23

6:00 am - 3:30 pmSTL-NRT

18h 30m1 stop

5:45 pm - 10:14 pmNRT-STL

19h 29m1 stop

$667United Airlines

Find Deal

Mon, Feb 9 - Fri, Feb 27

2:45 pm - 4:50 amSTL-HND

23h 05m2 stops

7:40 pm - 10:56 pmHND-STL

18h 16m2 stops

$670United Airlines

Find Deal

Mon, Feb 9 - Fri, Feb 27

6:45 am - 5:45 pmSTL-HND

20h 00m1 stop

4:25 pm - 8:39 pmHND-STL

19h 14m1 stop

$714Delta

Find Deal

Mon, Jan 12 - Mon, Jan 19

10:04 am - 5:45 pmSTL-HND

16h 41m1 stop

4:25 pm - 4:55 pmHND-STL

15h 30m1 stop

$716Delta

Find Deal

Thu, Jan 1 - Fri, Jan 23

4:05 pm - 4:20 pmSTL-NRT

33h 15m2 stops

6:15 pm - 9:00 pmNRT-STL

41h 45m2 stops

$728Air Canada

Find Deal

Fri, Feb 6 - Thu, Feb 19

6:00 am - 10:00 pmSTL-HND

25h 00m1 stop

10:50 am - 11:08 amHND-STL

15h 18m1 stop

$733Japan Airlines

Find Deal

Mon, Dec 1 - Tue, Feb 10

6:00 am - 2:40 pmSTL-NRT

17h 40m1 stop

5:05 pm - 11:59 pmNRT-STL

21h 54m1 stop

$734Japan Airlines

Find Deal

Mon, Dec 1 - Tue, Feb 10

4:05 pm - 4:30 pmSTL-NRT

57h 25m2 stops

6:45 pm - 10:00 pmNRT-STL

42h 15m2 stops

$739Air Canada

Find Deal

Fri, Feb 6 - Thu, Feb 19

ANA flights from St. Louis to Japan

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

ANA

Feb 15

STL7:41 amLambert-St Louis

23h 09m

2 stops

KIX9:50 pmOsaka Kansai Intl

Feb 27

KIX7:05 amOsaka Kansai Intl

20h 16m

2 stops

STL12:21 pmLambert-St Louis

$661

Find similar

ANA

Feb 24

STL6:00 amLambert-St Louis

18h 25m

1 stop

HND3:25 pmTokyo Haneda

Mar 5

HND6:20 pmTokyo Haneda

16h 05m

1 stop

STL7:25 pmLambert-St Louis

$705

Find similar

ANA

Jan 15

STL8:05 amLambert-St Louis

18h 40m

1 stop

HND5:45 pmTokyo Haneda

Jan 30

HND6:20 pmTokyo Haneda

16h 07m

1 stop

STL7:27 pmLambert-St Louis

$706

Find similar

United Airlines flights from St. Louis to Japan

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

United Airlines

Feb 9

STL6:00 amLambert-St Louis

18h 30m

1 stop

NRT3:30 pmTokyo Narita

Feb 27

NRT5:45 pmTokyo Narita

19h 29m

1 stop

STL10:14 pmLambert-St Louis

$667

Find similar

United Airlines

Feb 9

STL2:45 pmLambert-St Louis

23h 05m

2 stops

HND4:50 amTokyo Haneda

Feb 27

HND7:40 pmTokyo Haneda

18h 16m

2 stops

STL10:56 pmLambert-St Louis

$670

Find similar

United Airlines

Feb 9

STL6:00 amLambert-St Louis

18h 30m

1 stop

NRT3:30 pmTokyo Narita

Feb 27

NRT5:00 pmTokyo Narita

20h 00m

2 stops

STL10:00 pmLambert-St Louis

$672

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Fri 2/6

6:00 am-3:05 pm

1 stop18h 05m

Tokyo Haneda

Thu 2/19

1:05 pm-11:08 pm

1 stop25h 03m

$658

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/16

6:10 am-3:05 pm

1 stop17h 55m

Tokyo Haneda

Mon 2/23

6:05 pm-10:24 pm

1 stop19h 19m

$659

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

5:45 pm-10:14 pm

1 stop19h 29m

$667

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/9

2:45 pm-4:50 am

2 stops23h 05m

Tokyo Haneda

Fri 2/27

7:40 pm-10:56 pm

2 stops18h 16m

$670

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 1/12

6:45 am-5:45 pm

1 stop20h 00m

Tokyo Haneda

Mon 1/19

4:25 pm-8:39 pm

1 stop19h 14m

$714

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Thu 1/1

10:04 am-5:45 pm

1 stop16h 41m

Tokyo Haneda

Fri 1/23

4:25 pm-4:55 pm

1 stop15h 30m

$716

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Fri 2/6

4:05 pm-4:20 pm

2 stops33h 15m

Tokyo Narita

Thu 2/19

6:15 pm-9:00 pm

2 stops41h 45m

$728

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 12/1

6:00 am-10:00 pm

1 stop25h 00m

Tokyo Haneda

Tue 2/10

10:50 am-11:08 am

1 stop15h 18m

$733

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 12/1

6:00 am-2:40 pm

1 stop17h 40m

Tokyo Narita

Tue 2/10

5:05 pm-11:59 pm

1 stop21h 54m

$734

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Fri 2/6

4:05 pm-4:30 pm

2 stops57h 25m

Tokyo Narita

Thu 2/19

6:45 pm-10:00 pm

2 stops42h 15m

$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 $759. If you aren’t able to travel to Japan during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $822.

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 1% 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 September 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
American Airlines	PriceFrom $593	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,559 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 961 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights
Delta	PriceFrom $723	Free Cancellation	Rating 7.9 7,954 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 $383

Flights to Osakafrom $524

Flights to Okinawafrom $535

Flights to Fukuokafrom $531

Flights to Nagoyafrom $533

Flights to Hiroshimafrom $648

Flights to Ishigakifrom $667

Flights to Hakodatefrom $734

Flights to Kagoshimafrom $720

Flights to Miyakojimafrom $2,045

Flights to Toyamafrom $731

Flights to Sendaifrom $864

Cheap flights from St. Louis to Japan from $324

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 11/16. 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

ANA flights from St. Louis to Japan

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

United Airlines flights from St. Louis to Japan

Our best United 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 1% 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?

Hawaiian Airlines, Alaska Airlines, and Air Canada 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