What airlines fly to Japan?

United Airlines, Delta and ANA 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 30% 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 July 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.

$366 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 - 3:50 pm

STL

NRT

16h 55m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

1 stop

$874Air Canada

Thu, Sep 3 - Wed, Sep 16

8:55 am - 3:50 pm

STL

NRT

16h 55m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

2 stops

$899Air Canada

Thu, Sep 3 - Wed, Sep 16

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

1 stop

$903Air Canada

Sun, Sep 6 - Mon, Sep 21

5:42 am - 3:50 pm

STL

HND

20h 08m

2 stops

11:55 am - 10:59 pm

HND

STL

25h 04m

1 stop

$1,023American Airlines

Tue, Sep 1 - Tue, Sep 8

6:15 am - 7:10 pm

STL

ITM

22h 55m

2 stops

7:30 am - 11:57 am

ITM

STL

18h 27m

2 stops

$1,102ANA

Tue, Sep 15 - Tue, Sep 22

12:59 pm - 1:00 pm

STL

OKA

34h 01m

2 stops

9:05 pm - 12:13 pm

OKA

STL

29h 08m

2 stops

$1,163ANA

Mon, Sep 21 - Mon, Oct 5

5:30 pm - 10:45 pm

STL

OKA

63h 15m

2 stops

11:00 am - 9:21 pm

OKA

STL

48h 21m

2 stops

$1,184United Airlines

Mon, Sep 21 - Mon, Oct 5

5:30 pm - 10:45 pm

STL

OKA

63h 15m

2 stops

11:00 am - 12:40 pm

OKA

STL

39h 40m

3 stops

$1,339United Airlines

Mon, Sep 21 - Mon, Oct 5

6:29 am - 7:50 pm

STL

TAK

23h 21m

2 stops

8:40 pm - 4:48 pm

TAK

STL

34h 08m

2 stops

$2,173Japan Airlines

Sun, Sep 13 - Thu, Sep 17

7:27 am - 7:50 pm

STL

TAK

22h 23m

2 stops

9:45 am - 4:48 pm

TAK

STL

21h 03m

2 stops

$2,199Japan Airlines

Sun, Sep 13 - Thu, Sep 17

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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

Aug 18

STL5:11 pmLambert-St Louis

31h 39m

3 stops

KIX2:50 pmOsaka Kansai Intl

Sep 28

KIX9:45 amOsaka Kansai Intl

27h 58m

2 stops

STL11:43 pmLambert-St Louis

$1,219

Cathay Pacific

Aug 19

STL9:32 amLambert-St Louis

42h 33m

2 stops

KIX6:05 pmOsaka Kansai Intl

Oct 1

KIX6:30 pmOsaka Kansai Intl

43h 13m

2 stops

STL11:43 pmLambert-St Louis

$1,259

Cathay Pacific

Nov 25

STL6:13 pmLambert-St Louis

30h 07m

2 stops

FUK3:20 pmFukuoka

Nov 30

FUK4:30 pmFukuoka

44h 59m

2 stops

STL10:29 pmLambert-St Louis

$1,272

Delta flights from St. Louis to Japan

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

Delta

Sep 6

STL6:30 amLambert-St Louis

19h 45m

1 stop

HND4:15 pmTokyo Haneda

Sep 16

HND4:05 pmTokyo Haneda

21h 37m

2 stops

STL11:42 pmLambert-St Louis

$1,113

Delta

Jul 28

STL6:00 amLambert-St Louis

20h 15m

2 stops

HND4:15 pmTokyo Haneda

Aug 4

HND4:05 pmTokyo Haneda

21h 16m

2 stops

STL11:21 pmLambert-St Louis

$1,360

Delta

Jul 31

STL6:21 amLambert-St Louis

17h 59m

2 stops

HND2:20 pmTokyo Haneda

Aug 3

HND4:05 pmTokyo Haneda

21h 53m

2 stops

STL11:58 pmLambert-St Louis

$1,450

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 9/3

8:55 am-3:50 pm

1 stop16h 55m

Tokyo Narita

Wed 9/16

5:50 pm-6:41 pm

1 stop38h 51m

$874

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 9/3

8:55 am-3:50 pm

1 stop16h 55m

Tokyo Narita

Wed 9/16

5:50 pm-6:41 pm

2 stops38h 51m

$899

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 9/6

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Mon 9/21

5:50 pm-6:41 pm

1 stop38h 51m

$903

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/1

5:42 am-3:50 pm

2 stops20h 08m

Tokyo Haneda

Tue 9/8

11:55 am-10:59 pm

1 stop25h 04m

$1,023

Quickest round-trip

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:15 am-7:10 pm

2 stops22h 55m

Osaka Itami

Tue 9/22

7:30 am-11:57 am

2 stops18h 27m

$1,102

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Mon 9/21

12:59 pm-1:00 pm

2 stops34h 01m

Okinawa Naha

Mon 10/5

9:05 pm-12:13 pm

2 stops29h 08m

$1,163

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Mon 9/21

5:30 pm-10:45 pm

2 stops63h 15m

Okinawa Naha

Mon 10/5

11:00 am-9:21 pm

2 stops48h 21m

$1,184

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Mon 9/21

5:30 pm-10:45 pm

2 stops63h 15m

Okinawa Naha

Mon 10/5

11:00 am-12:40 pm

3 stops39h 40m

$1,339

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Sun 9/13

6:29 am-7:50 pm

2 stops23h 21m

Takamatsu

Thu 9/17

8:40 pm-4:48 pm

2 stops34h 08m

$2,173

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Sun 9/13

7:27 am-7:50 pm

2 stops22h 23m

Takamatsu

Thu 9/17

9:45 am-4:48 pm

2 stops21h 03m

$2,199

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 $813. 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 $899.

How far in advance should I book a flight from St. Louis to Japan?

You are more likely to see cheaper flights to Japan from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Japan for around $1,138 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Japan from St. Louis for as low as $672 on momondo.

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

You could potentially save up to 11% 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 24m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 24m

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 July 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 11,829 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,352 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 10,006 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,476 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,272 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,877 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.