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 46% 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 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 December 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.

$347 Cheap Flights from St. Louis to Japan in 2025/26

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Find the cheapest flights from St. Louis to Japan

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 4:40 pm

STL

HND

33h 35m1 stop

6:50 pm - 3:29 pm

HND

STL

35h 39m1 stop

$640Air Canada

Tue, Feb 3 - Tue, Feb 17

4:05 pm - 4:40 pm

STL

HND

33h 35m1 stop

6:50 pm - 3:29 pm

HND

STL

35h 39m1 stop

$641Air Canada

Fri, Feb 6 - Thu, Feb 19

11:20 am - 9:10 am

STL

ITM

30h 50m2 stops

7:05 am - 12:25 pm

ITM

STL

20h 20m2 stops

$689ANA

Tue, Feb 3 - Thu, Feb 19

6:00 am - 8:35 pm

STL

ITM

23h 35m2 stops

7:05 am - 12:25 pm

ITM

STL

20h 20m2 stops

$690ANA

Sun, Feb 15 - Sat, Feb 28

12:15 pm - 7:25 pm

STL

OKA

64h 10m2 stops

12:10 pm - 8:23 pm

OKA

STL

23h 13m2 stops

$713United Airlines

Thu, Feb 19 - Mon, Mar 2

6:45 pm - 4:40 pm

STL

KIX

54h 55m2 stops

6:35 pm - 10:36 am

KIX

STL

31h 01m2 stops

$720United Airlines

Sun, Feb 15 - Sat, Feb 28

7:00 am - 7:55 pm

STL

ITM

21h 55m2 stops

8:30 am - 2:45 pm

ITM

STL

21h 15m2 stops

$781American Airlines

Sun, Feb 15 - Sat, Feb 28

7:04 am - 6:45 pm

STL

ITM

20h 41m2 stops

2:40 pm - 9:15 pm

ITM

STL

21h 35m2 stops

$810American Airlines

Sun, Jan 18 - Sun, Jan 25

7:04 am - 7:55 pm

STL

ITM

21h 51m2 stops

7:30 am - 1:54 pm

ITM

STL

21h 24m2 stops

$825Japan Airlines

Tue, Feb 10 - Fri, Mar 6

3:20 pm - 8:25 am

STL

KIX

26h 05m2 stops

5:50 pm - 11:48 pm

KIX

STL

20h 58m1 stop

$828Japan Airlines

Tue, Feb 3 - Thu, Feb 19

ANA flights from St. Louis to Japan

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

ANA

Feb 3

STL11:20 amLambert-St Louis

30h 50m

2 stops

ITM9:10 amOsaka Itami

Feb 19

ITM7:05 amOsaka Itami

20h 20m

2 stops

STL12:25 pmLambert-St Louis

$689

Find similar

ANA

Feb 23

STL7:41 amLambert-St Louis

22h 24m

1 stop

HND9:05 pmTokyo Haneda

Mar 5

HND6:20 pmTokyo Haneda

15h 59m

1 stop

STL7:19 pmLambert-St Louis

$690

Find similar

ANA

Feb 9

STL8:05 amLambert-St Louis

18h 40m

1 stop

HND5:45 pmTokyo Haneda

Feb 27

HND6:20 pmTokyo Haneda

31h 16m

1 stop

STL10:36 amLambert-St Louis

$695

Find similar

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 27

NRT6:10 pmTokyo Narita

20h 49m

1 stop

STL11:59 pmLambert-St Louis

$817

Find similar

Japan Airlines

Feb 10

STL7:04 amLambert-St Louis

21h 51m

2 stops

ITM7:55 pmOsaka Itami

Mar 6

ITM7:30 amOsaka Itami

21h 24m

2 stops

STL1:54 pmLambert-St Louis

$825

Find similar

Japan Airlines

Feb 3

STL3:20 pmLambert-St Louis

26h 05m

2 stops

KIX8:25 amOsaka Kansai Intl

Feb 19

KIX5:50 pmOsaka Kansai Intl

20h 58m

1 stop

STL11:48 pmLambert-St Louis

$828

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 2/3

4:05 pm-4:40 pm

1 stop33h 35m

Tokyo Haneda

Tue 2/17

6:50 pm-3:29 pm

1 stop35h 39m

$640

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Fri 2/6

4:05 pm-4:40 pm

1 stop33h 35m

Tokyo Haneda

Thu 2/19

6:50 pm-3:29 pm

1 stop35h 39m

$641

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

11:20 am-9:10 am

2 stops30h 50m

Osaka Itami

Thu 2/19

7:05 am-12:25 pm

2 stops20h 20m

$689

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

6:00 am-8:35 pm

2 stops23h 35m

Osaka Itami

Sat 2/28

7:05 am-12:25 pm

2 stops20h 20m

$690

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 2/19

12:15 pm-7:25 pm

2 stops64h 10m

Okinawa Naha

Mon 3/2

12:10 pm-8:23 pm

2 stops23h 13m

$713

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:45 pm-4:40 pm

2 stops54h 55m

Osaka Kansai Intl

Sat 2/28

6:35 pm-10:36 am

2 stops31h 01m

$720

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

7:00 am-7:55 pm

2 stops21h 55m

Osaka Itami

Sat 2/28

8:30 am-2:45 pm

2 stops21h 15m

$781

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 1/18

7:04 am-6:45 pm

2 stops20h 41m

Osaka Itami

Sun 1/25

2:40 pm-9:15 pm

2 stops21h 35m

$810

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/10

7:04 am-7:55 pm

2 stops21h 51m

Osaka Itami

Fri 3/6

7:30 am-1:54 pm

2 stops21h 24m

$825

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

3:20 pm-8:25 am

2 stops26h 05m

Osaka Kansai Intl

Thu 2/19

5:50 pm-11:48 pm

1 stop20h 58m

$828

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 $738. 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 $789.

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 22% 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

Fastest flight time	15h 25m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 25m

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 December 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 10,506 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,043 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,640 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,017 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 9,066 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.

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Find better results for your trip to Japan

Popular cities in Japan

Flights to Tokyofrom $358

Flights to Osakafrom $574

Flights to Okinawafrom $579

Flights to Fukuokafrom $571

Flights to Nagoyafrom $580

Flights to Hiroshimafrom $595

Flights to Ishigakifrom $730

Flights to Kagoshimafrom $685

Flights to Hakodatefrom $781

Flights to Miyakojimafrom $2,159

Flights to Toyamafrom $892

Flights to Sendaifrom $753

Cheap flights from St. Louis to Japan from $347

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.

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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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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 22% 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 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

Fastest flight time

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