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

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

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.

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.

$338 Cheap Flights from St. Louis to Japan in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

11:20 am - 7:30 amSTL-ITM

29h 10m2 stops

8:00 am - 12:25 pmITM-STL

19h 25m2 stops

$689ANA

Find Deal

Tue, Feb 3 - Thu, Feb 19

7:41 am - 8:35 pmSTL-ITM

21h 54m2 stops

3:00 pm - 7:19 pmITM-STL

19h 19m2 stops

$690ANA

Find Deal

Sun, Feb 15 - Sat, Feb 28

7:41 am - 9:50 pmSTL-KIX

23h 09m2 stops

2:05 pm - 7:19 pmKIX-STL

20h 14m2 stops

$693ANA

Find Deal

Sun, Feb 15 - Sat, Feb 28

5:30 pm - 6:30 pmSTL-FUK

34h 00m2 stops

12:40 pm - 9:43 pmFUK-STL

24h 03m2 stops

$757United Airlines

Find Deal

Sun, Dec 7 - Thu, Dec 18

5:30 pm - 6:30 pmSTL-FUK

34h 00m2 stops

12:40 pm - 7:13 pmFUK-STL

21h 33m2 stops

$758United Airlines

Find Deal

Sun, Dec 7 - Wed, Dec 17

7:04 am - 6:50 pmSTL-KIX

20h 46m1 stop

5:50 pm - 11:59 pmKIX-STL

21h 09m1 stop

$824Japan Airlines

Find Deal

Mon, Jan 12 - Tue, Jan 20

6:42 pm - 4:30 pmSTL-NRT

30h 48m2 stops

6:45 pm - 3:29 pmNRT-STL

35h 44m2 stops

$829Air Canada

Find Deal

Mon, Dec 8 - Sat, Dec 20

6:42 pm - 4:30 pmSTL-NRT

30h 48m2 stops

6:45 pm - 3:29 pmNRT-STL

35h 44m2 stops

$830Air Canada

Find Deal

Mon, Dec 8 - Sat, Dec 20

6:00 am - 7:20 pmSTL-ITM

22h 20m2 stops

12:30 pm - 6:16 pmITM-STL

20h 46m2 stops

$831Japan Airlines

Find Deal

Mon, Jan 12 - Tue, Jan 20

6:59 pm - 2:05 pmSTL-HND

29h 06m2 stops

5:20 pm - 11:10 pmHND-STL

19h 50m1 stop

$848Delta

Find Deal

Thu, Mar 12 - Tue, Mar 24

United Airlines flights from St. Louis to Japan

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

United Airlines

Dec 7

STL5:30 pmLambert-St Louis

34h 00m

2 stops

FUK6:30 pmFukuoka

Dec 17

FUK12:40 pmFukuoka

18h 47m

2 stops

STL4:27 pmLambert-St Louis

$757

Find similar

United Airlines

Dec 7

STL5:30 pmLambert-St Louis

34h 00m

2 stops

FUK6:30 pmFukuoka

Dec 17

FUK12:40 pmFukuoka

21h 33m

2 stops

STL7:13 pmLambert-St Louis

$758

Find similar

United Airlines

Dec 7

STL5:30 pmLambert-St Louis

34h 00m

2 stops

FUK6:30 pmFukuoka

Dec 18

FUK12:40 pmFukuoka

24h 15m

2 stops

STL9:55 pmLambert-St Louis

$759

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 14

STL7:15 amLambert-St Louis

21h 40m

2 stops

ITM7:55 pmOsaka Itami

Jan 31

ITM4:30 pmOsaka Itami

22h 29m

2 stops

STL11:59 pmLambert-St Louis

$708

Find similar

American Airlines

Dec 8

STL6:55 amLambert-St Louis

21h 10m

2 stops

FUK7:05 pmFukuoka

Dec 18

FUK3:55 pmFukuoka

22h 56m

2 stops

STL11:51 pmLambert-St Louis

$767

Find similar

American Airlines

Dec 8

STL6:55 amLambert-St Louis

21h 10m

2 stops

FUK7:05 pmFukuoka

Dec 18

FUK3:55 pmFukuoka

22h 56m

2 stops

STL11:51 pmLambert-St Louis

$770

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

11:20 am-7:30 am

2 stops29h 10m

Osaka Itami

Thu 2/19

8:00 am-12:25 pm

2 stops19h 25m

$689

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

7:41 am-8:35 pm

2 stops21h 54m

Osaka Itami

Sat 2/28

3:00 pm-7:19 pm

2 stops19h 19m

$690

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

7:41 am-9:50 pm

2 stops23h 09m

Osaka Kansai Intl

Sat 2/28

2:05 pm-7:19 pm

2 stops20h 14m

$693

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Sun 12/7

5:30 pm-6:30 pm

2 stops34h 00m

Fukuoka

Thu 12/18

12:40 pm-9:43 pm

2 stops24h 03m

$757

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Sun 12/7

5:30 pm-6:30 pm

2 stops34h 00m

Fukuoka

Wed 12/17

12:40 pm-7:13 pm

2 stops21h 33m

$758

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 1/12

7:04 am-6:50 pm

1 stop20h 46m

Osaka Kansai Intl

Tue 1/20

5:50 pm-11:59 pm

1 stop21h 09m

$824

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 12/8

6:42 pm-4:30 pm

2 stops30h 48m

Tokyo Narita

Sat 12/20

6:45 pm-3:29 pm

2 stops35h 44m

$829

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 12/8

6:42 pm-4:30 pm

2 stops30h 48m

Tokyo Narita

Sat 12/20

6:45 pm-3:29 pm

2 stops35h 44m

$830

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 1/12

6:00 am-7:20 pm

2 stops22h 20m

Osaka Itami

Tue 1/20

12:30 pm-6:16 pm

2 stops20h 46m

$831

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Thu 3/12

6:59 pm-2:05 pm

2 stops29h 06m

Tokyo Haneda

Tue 3/24

5:20 pm-11:10 pm

1 stop19h 50m

$848

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 10,454 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,052 reviews	Search American Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,005 reviews	Search ANA flights
Japan Airlines	PriceFrom $703	Free Cancellation	Rating 8.3 1,620 reviews	Search Japan Airlines flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 9,017 reviews	Search United Airlines flights
Delta	PriceFrom $722	Free Cancellation	Rating 7.9 8,009 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 12/15

Mon 12/22

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Japan

Popular cities in Japan

Flights to Tokyofrom $448

Flights to Osakafrom $569

Flights to Okinawafrom $579

Flights to Fukuokafrom $572

Flights to Nagoyafrom $577

Flights to Hiroshimafrom $645

Flights to Ishigakifrom $745

Flights to Kagoshimafrom $745

Flights to Hakodatefrom $900

Flights to Nagasakifrom $737

Flights to Miyakojimafrom $2,105

Flights to Toyamafrom $772

Cheap flights from St. Louis to Japan from $338

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 12/6. 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

United Airlines flights from St. Louis to Japan

Our best United 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

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Japan that are best for you.

See travel insights to Japan from

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?

ANA, American Airlines, 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

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