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

United 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 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.

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 August 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.

$423 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.

8:55 am - 4:25 pmSTL Lambert-St Louis-KIX Osaka Kansai Intl

17h 30m1 stop Toronto Pearson Intl

6:00 pm - 8:20 pmKIX Osaka Kansai Intl-STL Lambert-St Louis

16h 20m1 stop Toronto Pearson Intl

$801Air Canada

Thu, Sep 3 - Wed, Sep 16

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

37h 15m1 stop Montreal Pierre Elliott Trudeau Intl

5:50 pm - 9:21 pmNRT Tokyo Narita-STL Lambert-St Louis

41h 31m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$812Air Canada

Mon, Sep 7 - Mon, Sep 28

2:40 pm - 10:30 pmSTL Lambert-St Louis-HND Tokyo Haneda

41h 50m2 stops Toronto Pearson Intl Osaka Kansai Intl

6:05 pm - 2:17 pmHND Tokyo Haneda-STL Lambert-St Louis

34h 12m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$882Multiple Airlines

Mon, Sep 7 - Mon, Sep 28

6:30 am - 4:30 pmSTL Lambert-St Louis-NRT Tokyo Narita

43h 00m1 stop Montreal Pierre Elliott Trudeau Intl

6:45 pm - 3:26 pmNRT Tokyo Narita-STL Lambert-St Louis

35h 41m1 stop Toronto Pearson Intl

$894ANA

Mon, Feb 1 - Wed, Feb 17

2:40 pm - 10:30 pmSTL Lambert-St Louis-HND Tokyo Haneda

41h 50m2 stops Toronto Pearson Intl Osaka Kansai Intl

6:05 pm - 8:20 pmHND Tokyo Haneda-STL Lambert-St Louis

16h 15m1 stop Toronto Pearson Intl

$895Multiple Airlines

Mon, Sep 7 - Mon, Sep 28

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

33h 25m1 stop Toronto Pearson Intl

6:45 pm - 3:26 pmNRT Tokyo Narita-STL Lambert-St Louis

35h 41m1 stop Toronto Pearson Intl

$982ANA

Fri, Jan 22 - Sun, Jan 31

10:29 am - 4:15 pmSTL Lambert-St Louis-HND Tokyo Haneda

15h 46m1 stop Detroit Metropolitan Wayne County

4:05 pm - 11:16 pmHND Tokyo Haneda-STL Lambert-St Louis

21h 11m1 stop Minneapolis St Paul

$1,080Delta

Tue, Sep 22 - Tue, Sep 29

6:00 am - 4:15 pmSTL Lambert-St Louis-HND Tokyo Haneda

20h 15m2 stops Atlanta Hartsfield-Jackson Detroit Metropolitan Wayne County

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

22h 09m2 stops Los Angeles Salt Lake City

$1,085Delta

Tue, Sep 22 - Tue, Sep 29

7:00 am - 2:20 pmSTL Lambert-St Louis-HND Tokyo Haneda

17h 20m1 stop Dallas/Fort Worth

7:45 pm - 11:30 pmHND Tokyo Haneda-STL Lambert-St Louis

17h 45m1 stop Los Angeles

$1,100American Airlines

Mon, Sep 21 - Mon, Sep 28

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

18h 00m1 stop Dallas/Fort Worth

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

19h 13m1 stop Dallas/Fort Worth

$1,101American Airlines

Mon, Sep 21 - Mon, Sep 28

Cheap last minute flights

Enter your travel dates to find the best prices.

6:54 pm - 3:25 pmSTL Lambert-St Louis-NRT Tokyo Narita

30h 31m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

5:50 pm - 11:57 amNRT Tokyo Narita-STL Lambert-St Louis

32h 07m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$816Air Canada

Sat, Aug 29 - Thu, Sep 10

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

37h 15m1 stop Montreal Pierre Elliott Trudeau Intl

5:50 pm - 2:15 pmNRT Tokyo Narita-STL Lambert-St Louis

34h 25m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$826Air Canada

Fri, Aug 28 - Fri, Sep 11

6:00 am - 3:50 pmSTL Lambert-St Louis-HND Tokyo Haneda

19h 50m1 stop Los Angeles

4:30 pm - 11:42 pmHND Tokyo Haneda-STL Lambert-St Louis

21h 12m1 stop Dallas/Fort Worth

$1,050American Airlines

Wed, Aug 26 - Wed, Sep 2

6:09 pm - 1:05 pmSTL Lambert-St Louis-HND Tokyo Haneda

28h 56m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul

4:35 pm - 9:31 pmHND Tokyo Haneda-STL Lambert-St Louis

18h 56m2 stops Los Angeles Salt Lake City

$1,056Delta

Sat, Aug 29 - Thu, Sep 10

6:00 am - 4:15 pmSTL Lambert-St Louis-HND Tokyo Haneda

20h 15m2 stops Atlanta Hartsfield-Jackson Detroit Metropolitan Wayne County

6:25 pm - 11:21 pmHND Tokyo Haneda-STL Lambert-St Louis

18h 56m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

$1,056Delta

Wed, Aug 26 - Wed, Sep 2

6:36 am - 5:45 pmSTL Lambert-St Louis-ITM Osaka Itami

21h 09m2 stops Dallas/Fort Worth Tokyo Haneda

3:35 pm - 10:59 pmITM Osaka Itami-STL Lambert-St Louis

21h 24m2 stops Tokyo Haneda Los Angeles

$1,060American Airlines

Tue, Aug 25 - Thu, Sep 3

12:10 pm - 7:40 pmSTL Lambert-St Louis-FUK Fukuoka

41h 30m2 stops Montreal Pierre Elliott Trudeau Intl Incheon Intl

10:45 am - 6:41 pmFUK Fukuoka-STL Lambert-St Louis

45h 56m2 stops Tokyo Narita Montreal Pierre Elliott Trudeau Intl

$1,087Multiple Airlines

Wed, Aug 26 - Wed, Sep 9

6:15 am - 7:00 pmSTL Lambert-St Louis-FUK Fukuoka

22h 45m2 stops Houston George Bush Intcntl Tokyo Haneda

9:25 am - 7:16 pmFUK Fukuoka-STL Lambert-St Louis

23h 51m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,096ANA

Wed, Aug 26 - Wed, Sep 9

6:15 am - 8:45 pmSTL Lambert-St Louis-FUK Fukuoka

24h 30m2 stops Houston George Bush Intcntl Tokyo Haneda

8:40 pm - 11:57 amFUK Fukuoka-STL Lambert-St Louis

29h 17m2 stops Tokyo Haneda Chicago O'Hare Intl

$1,096ANA

Wed, Aug 26 - Wed, Sep 9

7:36 pm - 4:00 pmSTL Lambert-St Louis-NRT Tokyo Narita

30h 24m1 stop Seattle/Tacoma Intl

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

38h 30m2 stops Los Angeles Las Vegas Harry Reid Intl

$1,115Multiple Airlines

Fri, Aug 28 - Mon, Aug 31

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Korean Air flights from St. Louis to Japan

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

Korean Air

Aug 31

STL11:13 amLambert-St Louis

39h 42m

2 stops

FUK4:55 pmFukuoka

Sep 4

FUK9:05 pmFukuoka

38h 58m

2 stops

STL10:03 pmLambert-St Louis

$1,682

Korean Air

Nov 14

STL2:31 pmLambert-St Louis

59h 34m

2 stops

OKA5:05 pmOkinawa Naha

Nov 19

OKA6:05 pmOkinawa Naha

32h 10m

2 stops

STL11:15 amLambert-St Louis

$1,937

Qatar Airways flights from St. Louis to Japan

Our best Qatar Airways deals on St. Louis to Japan flight tickets

Qatar Airways

Aug 31

STL11:35 amLambert-St Louis

60h 25m

3 stops

KIX2:00 pmOsaka Kansai Intl

Sep 14

KIX6:55 pmOsaka Kansai Intl

38h 12m

2 stops

STL7:07 pmLambert-St Louis

$1,595

Qatar Airways

Oct 2

STL11:09 amLambert-St Louis

55h 46m

3 stops

FUK8:55 amFukuoka

Oct 11

FUK2:00 pmFukuoka

38h 30m

3 stops

STL2:30 pmLambert-St Louis

$2,177

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisOsaka

STL Lambert-St Louis - KIX Osaka Kansai Intl

STLKIX

Lambert-St Louis

Thu 9/3

8:55 am-4:25 pm

1 stop17h 30m

Osaka Kansai Intl

Wed 9/16

6:00 pm-8:20 pm

1 stop16h 20m

$801

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Mon 9/7

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Mon 9/28

5:50 pm-9:21 pm

2 stops41h 31m

$812

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Mon 9/7

2:40 pm-10:30 pm

2 stops41h 50m

Tokyo Haneda

Mon 9/28

6:05 pm-2:17 pm

2 stops34h 12m

$882

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Mon 2/1

6:30 am-4:30 pm

1 stop43h 00m

Tokyo Narita

Wed 2/17

6:45 pm-3:26 pm

1 stop35h 41m

$894

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Mon 9/7

2:40 pm-10:30 pm

2 stops41h 50m

Tokyo Haneda

Mon 9/28

6:05 pm-8:20 pm

1 stop16h 15m

$895

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Fri 1/22

4:05 pm-4:30 pm

1 stop33h 25m

Tokyo Narita

Sun 1/31

6:45 pm-3:26 pm

1 stop35h 41m

$982

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Tue 9/22

10:29 am-4:15 pm

1 stop15h 46m

Tokyo Haneda

Tue 9/29

4:05 pm-11:16 pm

1 stop21h 11m

$1,080

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Tue 9/22

6:00 am-4:15 pm

2 stops20h 15m

Tokyo Haneda

Tue 9/29

4:35 pm-12:44 am

2 stops22h 09m

$1,085

St. LouisTokyo

STL Lambert-St Louis - HND Tokyo Haneda

STLHND

Lambert-St Louis

Mon 9/21

7:00 am-2:20 pm

1 stop17h 20m

Tokyo Haneda

Mon 9/28

7:45 pm-11:30 pm

1 stop17h 45m

$1,100

St. LouisTokyo

STL Lambert-St Louis - NRT Tokyo Narita

STLNRT

Lambert-St Louis

Mon 9/21

7:00 am-3:00 pm

1 stop18h 00m

Tokyo Narita

Mon 9/28

6:30 pm-11:43 pm

1 stop19h 13m

$1,101

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 $833. 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	$423
Fastest flight time	15h 30m
Direct flights	None

The best one-way flight to Japan from St. Louis in the past 72 hours is $423. The best round-trip flight deal from St. Louis to Japan found on momondo in the last 72 hours is $801.

The fastest flight from St. Louis to Japan takes 15h 30m

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 August 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 $593	Free Cancellation	Rating 7.1 11,985 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,526 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 10,116 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,518 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,302 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,909 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.