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

Hawaiian Airlines, Air Canada, and ANA 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 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.

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.

$314 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

Enter your travel dates to find the best prices.

4:05 pm - 4:20 pm

STL

NRT

33h 15m2 stops

6:15 pm - 9:07 pm

NRT

STL

41h 52m2 stops

$622Air Canada

Thu, Feb 26 - Wed, Mar 4

4:05 pm - 4:20 pm

STL

NRT

33h 15m2 stops

6:45 pm - 3:29 pm

NRT

STL

35h 44m1 stop

$641Air Canada

Thu, Feb 26 - Wed, Mar 4

6:55 pm - 4:30 pm

STL

NRT

30h 35m2 stops

6:15 pm - 3:29 pm

NRT

STL

36h 14m2 stops

$643Air Canada

Mon, Feb 23 - Thu, Mar 5

8:30 am - 4:50 pm

STL

HND

17h 20m1 stop

4:25 pm - 10:25 pm

HND

STL

20h 00m1 stop

$697United Airlines

Sat, Feb 28 - Tue, Mar 10

7:04 am - 8:30 pm

STL

ITM

22h 26m2 stops

3:25 pm - 10:54 pm

ITM

STL

22h 29m2 stops

$747American Airlines

Tue, Feb 3 - Thu, Feb 19

7:04 am - 5:35 pm

STL

ITM

19h 31m2 stops

4:30 pm - 11:48 pm

ITM

STL

22h 18m2 stops

$748American Airlines

Tue, Feb 3 - Thu, Feb 19

11:55 am - 8:45 pm

STL

KIX

41h 50m2 stops

11:55 am - 2:47 pm

KIX

STL

41h 52m2 stops

$782Delta

Sun, Feb 15 - Sat, Feb 28

8:30 am - 6:30 pm

STL

FUK

43h 00m2 stops

12:40 pm - 7:27 pm

FUK

STL

21h 47m2 stops

$790United Airlines

Sun, Jan 18 - Thu, Jan 22

6:30 am - 6:50 pm

STL

KIX

21h 20m1 stop

5:50 pm - 11:48 pm

KIX

STL

20h 58m1 stop

$824Japan Airlines

Sun, Feb 15 - Sat, Feb 28

7:04 am - 10:20 pm

STL

KIX

24h 16m2 stops

5:50 pm - 11:48 pm

KIX

STL

20h 58m1 stop

$827Japan Airlines

Tue, Feb 3 - Thu, Feb 19

EVA Air flights from St. Louis to Japan

Our best EVA Air deals on St. Louis to Japan flight tickets

EVA Air

Dec 28

STL7:00 amLambert-St Louis

35h 15m

2 stops

OKA9:15 amOkinawa Naha

Dec 30

OKA8:10 pmOkinawa Naha

42h 49m

2 stops

STL11:59 pmLambert-St Louis

$2,351

Find similar

EVA Air

Dec 28

STL7:00 amLambert-St Louis

37h 15m

2 stops

FUK11:15 amFukuoka

Dec 30

FUK8:55 pmFukuoka

42h 04m

2 stops

STL11:59 pmLambert-St Louis

$2,358

Find similar

EVA Air

Dec 29

STL5:26 pmLambert-St Louis

26h 49m

2 stops

FUK11:15 amFukuoka

Dec 31

FUK8:55 pmFukuoka

42h 04m

2 stops

STL11:59 pmLambert-St Louis

$2,409

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 28

STL8:30 amLambert-St Louis

17h 20m

1 stop

HND4:50 pmTokyo Haneda

Mar 10

HND4:25 pmTokyo Haneda

20h 00m

1 stop

STL10:25 pmLambert-St Louis

$697

Find similar

United Airlines

Feb 28

STL8:30 amLambert-St Louis

17h 20m

1 stop

HND4:50 pmTokyo Haneda

Mar 10

HND6:25 pmTokyo Haneda

19h 26m

1 stop

STL11:51 pmLambert-St Louis

$698

Find similar

United Airlines

Feb 23

STL9:55 amLambert-St Louis

16h 50m

1 stop

HND5:45 pmTokyo Haneda

Mar 5

HND9:05 pmTokyo Haneda

17h 29m

2 stops

STL11:34 pmLambert-St Louis

$701

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 2/26

4:05 pm-4:20 pm

2 stops33h 15m

Tokyo Narita

Wed 3/4

6:15 pm-9:07 pm

2 stops41h 52m

$622

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 2/26

4:05 pm-4:20 pm

2 stops33h 15m

Tokyo Narita

Wed 3/4

6:45 pm-3:29 pm

1 stop35h 44m

$641

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/23

6:55 pm-4:30 pm

2 stops30h 35m

Tokyo Narita

Thu 3/5

6:15 pm-3:29 pm

2 stops36h 14m

$643

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sat 2/28

8:30 am-4:50 pm

1 stop17h 20m

Tokyo Haneda

Tue 3/10

4:25 pm-10:25 pm

1 stop20h 00m

$697

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

7:04 am-8:30 pm

2 stops22h 26m

Osaka Itami

Thu 2/19

3:25 pm-10:54 pm

2 stops22h 29m

$747

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

7:04 am-5:35 pm

2 stops19h 31m

Osaka Itami

Thu 2/19

4:30 pm-11:48 pm

2 stops22h 18m

$748

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

11:55 am-8:45 pm

2 stops41h 50m

Osaka Kansai Intl

Sat 2/28

11:55 am-2:47 pm

2 stops41h 52m

$782

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Sun 1/18

8:30 am-6:30 pm

2 stops43h 00m

Fukuoka

Thu 1/22

12:40 pm-7:27 pm

2 stops21h 47m

$790

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:30 am-6:50 pm

1 stop21h 20m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:48 pm

1 stop20h 58m

$824

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

7:04 am-10:20 pm

2 stops24h 16m

Osaka Kansai Intl

Thu 2/19

5:50 pm-11:48 pm

1 stop20h 58m

$827

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 $747. 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 $791.

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	16h 35m
Direct flights	None

The fastest flight from St. Louis to Japan takes 16h 35m

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 10,558 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,058 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,662 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,044 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 9,115 reviews	Search United Airlines flights
Delta	PriceFrom $722	Free Cancellation	Rating 7.9 8,012 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.