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 31% 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?

Delta, Cathay Pacific, and Japan 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 September 2026.

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.

$380 Cheap Flights from St. Louis to Japan in 2026

Discover deals from 900+ travel sites with momondo.

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.

7:00 pm - 4:30 pmSTL Lambert-St Louis-NRT Tokyo Narita

30h 30m2 stops Chicago O'Hare Intl Toronto Pearson Intl

6:45 pm - 12:13 pmNRT Tokyo Narita-STL Lambert-St Louis

32h 28m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$769Air Canada

Wed, Jan 13 - Wed, Jan 20

4:05 pm - 4:30 pmSTL Lambert-St Louis-NRT Tokyo Narita

33h 25m1 stop Toronto Pearson Intl

6:45 pm - 3:41 pmNRT Tokyo Narita-STL Lambert-St Louis

35h 56m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$772Air Canada

Wed, Feb 3 - Thu, Feb 18

7:00 pm - 4:30 pmSTL Lambert-St Louis-NRT Tokyo Narita

30h 30m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:45 pm - 11:09 pmNRT Tokyo Narita-STL Lambert-St Louis

19h 24m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$796Multiple Airlines

Mon, Feb 1 - Wed, Feb 17

7:30 am - 5:45 pmSTL Lambert-St Louis-HND Tokyo Haneda

19h 15m1 stop Chicago O'Hare Intl

6:20 pm - 6:08 pmHND Tokyo Haneda-STL Lambert-St Louis

14h 48m1 stop Chicago O'Hare Intl

$839ANA

Tue, Jan 12 - Tue, Jan 26

6:15 am - 3:25 pmSTL Lambert-St Louis-HND Tokyo Haneda

18h 10m1 stop Houston George Bush Intcntl

6:20 pm - 6:06 pmHND Tokyo Haneda-STL Lambert-St Louis

14h 46m1 stop Chicago O'Hare Intl

$839ANA

Mon, Feb 1 - Fri, Feb 12

6:15 am - 11:20 amSTL Lambert-St Louis-KIX Osaka Kansai Intl

39h 05m2 stops Minneapolis St Paul Incheon Intl

2:15 am - 5:10 pmKIX Osaka Kansai Intl-STL Lambert-St Louis

28h 55m2 stops Incheon Intl Detroit Metropolitan Wayne County

$841Delta

Tue, Sep 15 - Mon, Sep 21

7:05 am - 2:15 pmSTL Lambert-St Louis-HND Tokyo Haneda

17h 10m1 stop Atlanta Hartsfield-Jackson

6:25 pm - 8:51 pmHND Tokyo Haneda-STL Lambert-St Louis

16h 26m1 stop Detroit Metropolitan Wayne County

$846Delta

Wed, Sep 30 - Wed, Oct 7

8:30 am - 3:10 pmSTL Lambert-St Louis-NRT Tokyo Narita

16h 40m1 stop Chicago O'Hare Intl

5:05 pm - 6:39 pmNRT Tokyo Narita-STL Lambert-St Louis

15h 34m1 stop San Francisco

$858Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

7:00 am - 3:00 pmSTL Lambert-St Louis-NRT Tokyo Narita

18h 00m1 stop Dallas/Fort Worth

9:45 am - 10:18 amNRT Tokyo Narita-STL Lambert-St Louis

14h 33m1 stop Chicago O'Hare Intl

$1,000American Airlines

Tue, Sep 15 - Sun, Sep 20

8:30 am - 7:50 pmSTL Lambert-St Louis-ITM Osaka Itami

21h 20m2 stops Dallas/Fort Worth Tokyo Narita

7:25 am - 12:15 pmITM Osaka Itami-STL Lambert-St Louis

18h 50m2 stops Tokyo Haneda Dallas/Fort Worth

$1,028American Airlines

Tue, Sep 15 - Tue, Sep 22

Cheap last minute flights

Enter your travel dates to find the best prices.

6:20 am - 1:05 pmSTL Lambert-St Louis-HND Tokyo Haneda

16h 45m1 stop Minneapolis St Paul

4:35 pm - 12:44 amHND Tokyo Haneda-STL Lambert-St Louis

22h 09m2 stops Los Angeles Los Angeles Salt Lake City

$828Delta

Mon, Sep 7 - Wed, Sep 30

6:20 am - 2:20 pmSTL Lambert-St Louis-HND Tokyo Haneda

18h 00m2 stops Minneapolis St Paul Seattle/Tacoma Intl

4:35 pm - 12:44 amHND Tokyo Haneda-STL Lambert-St Louis

22h 09m2 stops Los Angeles Los Angeles Salt Lake City

$828Delta

Mon, Sep 7 - Wed, Sep 30

12:10 pm - 3:25 pmSTL Lambert-St Louis-NRT Tokyo Narita

37h 15m1 stop Montreal Pierre Elliott Trudeau Intl

5:50 pm - 2:00 pmNRT Tokyo Narita-STL Lambert-St Louis

34h 10m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

$833Air Canada

Mon, Sep 7 - Mon, Sep 14

6:53 pm - 3:25 pmSTL Lambert-St Louis-NRT Tokyo Narita

30h 32m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

5:50 pm - 2:00 pmNRT Tokyo Narita-STL Lambert-St Louis

34h 10m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

$837Air Canada

Mon, Sep 7 - Mon, Sep 14

6:36 am - 2:20 pmSTL Lambert-St Louis-HND Tokyo Haneda

17h 44m1 stop Dallas/Fort Worth

4:30 pm - 7:07 pmHND Tokyo Haneda-STL Lambert-St Louis

16h 37m1 stop Dallas/Fort Worth

$858American Airlines

Mon, Sep 7 - Mon, Sep 14

5:42 am - 3:00 pmSTL Lambert-St Louis-NRT Tokyo Narita

19h 18m1 stop Dallas/Fort Worth

6:30 pm - 11:43 pmNRT Tokyo Narita-STL Lambert-St Louis

19h 13m1 stop Dallas/Fort Worth

$859American Airlines

Mon, Sep 7 - Mon, Sep 14

12:10 pm - 3:25 pmSTL Lambert-St Louis-NRT Tokyo Narita

37h 15m1 stop Montreal Pierre Elliott Trudeau Intl

5:50 pm - 8:20 pmNRT Tokyo Narita-STL Lambert-St Louis

16h 30m1 stop Toronto Pearson Intl

$879ANA

Mon, Sep 7 - Mon, Sep 28

8:30 am - 3:25 pmSTL Lambert-St Louis-HND Tokyo Haneda

16h 55m1 stop Chicago O'Hare Intl

5:15 pm - 8:00 pmHND Tokyo Haneda-STL Lambert-St Louis

16h 45m1 stop Chicago O'Hare Intl

$902ANA

Mon, Sep 7 - Mon, Sep 14

9:30 am - 3:10 pmSTL Lambert-St Louis-NRT Tokyo Narita

15h 40m1 stop Chicago O'Hare Intl

5:05 pm - 6:43 pmNRT Tokyo Narita-STL Lambert-St Louis

15h 38m1 stop San Francisco

$1,051United Airlines

Mon, Sep 7 - Wed, Sep 30

6:00 am - 3:10 pmSTL Lambert-St Louis-NRT Tokyo Narita

19h 10m1 stop Chicago O'Hare Intl

5:00 pm - 6:32 pmNRT Tokyo Narita-STL Lambert-St Louis

15h 32m1 stop Houston George Bush Intcntl

$1,101United Airlines

Mon, Sep 7 - Mon, Sep 14

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Cathay Pacific flights from St. Louis to Japan

Our best Cathay Pacific deals on St. Louis to Japan flight tickets

Cathay Pacific

Sep 7

STL6:00 amLambert-St Louis

34h 50m

2 stops

NRT6:50 amTokyo Narita

Sep 14

NRT6:20 pmTokyo Narita

40h 24m

2 stops

STL8:44 pmLambert-St Louis

$1,116

Cathay Pacific

Sep 7

STL9:32 amLambert-St Louis

31h 18m

2 stops

NRT6:50 amTokyo Narita

Sep 14

NRT10:00 pmTokyo Narita

39h 30m

2 stops

STL11:30 pmLambert-St Louis

$1,117

Cathay Pacific

Nov 25

STL6:55 pmLambert-St Louis

27h 05m

2 stops

FUK1:00 pmFukuoka

Dec 2

FUK2:15 pmFukuoka

48h 44m

2 stops

STL11:59 pmLambert-St Louis

$1,158

Air Canada flights from St. Louis to Japan

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

Air Canada

Jan 13

STL7:00 pmLambert-St Louis

30h 30m

2 stops

NRT4:30 pmTokyo Narita

Jan 20

NRT6:45 pmTokyo Narita

32h 28m

2 stops

STL12:13 pmLambert-St Louis

$769

Air Canada

Feb 3

STL4:05 pmLambert-St Louis

33h 25m

1 stop

NRT4:30 pmTokyo Narita

Feb 23

NRT6:45 pmTokyo Narita

41h 28m

2 stops

STL9:13 pmLambert-St Louis

$772

Air Canada

Jan 16

STL10:50 amLambert-St Louis

38h 40m

2 stops

NRT4:30 pmTokyo Narita

Jan 22

NRT6:45 pmTokyo Narita

32h 28m

2 stops

STL12:13 pmLambert-St Louis

$773

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Wed 1/13

7:00 pm-4:30 pm

2 stops30h 30m

Tokyo Narita

Wed 1/20

6:45 pm-12:13 pm

2 stops32h 28m

$769

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Wed 2/3

4:05 pm-4:30 pm

1 stop33h 25m

Tokyo Narita

Thu 2/18

6:45 pm-3:41 pm

2 stops35h 56m

$772

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Mon 2/1

7:00 pm-4:30 pm

2 stops30h 30m

Tokyo Narita

Wed 2/17

6:45 pm-11:09 pm

2 stops19h 24m

$796

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Tue 1/12

7:30 am-5:45 pm

1 stop19h 15m

Tokyo Haneda

Tue 1/26

6:20 pm-6:08 pm

1 stop14h 48m

$839

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Mon 2/1

6:15 am-3:25 pm

1 stop18h 10m

Tokyo Haneda

Fri 2/12

6:20 pm-6:06 pm

1 stop14h 46m

$839

St. LouisOsaka

STL Lambert-St Louis - KIX Osaka Kansai Intl

STLKIX

Lambert-St Louis

Tue 9/15

6:15 am-11:20 am

2 stops39h 05m

Osaka Kansai Intl

Mon 9/21

2:15 am-5:10 pm

2 stops28h 55m

$841

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Wed 9/30

7:05 am-2:15 pm

1 stop17h 10m

Tokyo Haneda

Wed 10/7

6:25 pm-8:51 pm

1 stop16h 26m

$846

Quickest round-trip

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Wed 9/16

8:30 am-3:10 pm

1 stop16h 40m

Tokyo Narita

Wed 9/23

5:05 pm-6:39 pm

1 stop15h 34m

$858

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Tue 9/15

7:00 am-3:00 pm

1 stop18h 00m

Tokyo Narita

Sun 9/20

9:45 am-10:18 am

1 stop14h 33m

$1,000

St. LouisOsaka

STL Lambert-St Louis - ITM Osaka Itami

STLITM

Lambert-St Louis

Tue 9/15

8:30 am-7:50 pm

2 stops21h 20m

Osaka Itami

Tue 9/22

7:25 am-12:15 pm

2 stops18h 50m

$1,028

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 February is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $864. If you aren’t able to travel to Japan during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $898.

Can stopping save me money on St. Louis to Japan flights?

You could potentially save up to 15% 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	$380
Fastest flight time	15h 40m
Direct flights	None

The best one-way flight to Japan from St. Louis in the past 72 hours is $380. The best round-trip flight deal from St. Louis to Japan found on momondo in the last 72 hours is $769.

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

There are no direct flights from St. Louis to Japan. There are no popular flight routes from St. Louis to Japan.

Search flight deals

Frequently asked questions about flying from 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 September 2026.
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 $633	Free Cancellation	Rating 7.1 12,045 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,586 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 10,174 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,574 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,309 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,911 reviews	Search Japan Airlines 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.