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?

United Airlines, Delta and Japan 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 33% 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 June 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.

$456 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.

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 12:13 pm

NRT

STL

32h 23m

2 stops

$957Air Canada

Mon, Sep 28 - Tue, Oct 13

5:30 pm - 2:55 pm

STL

NRT

31h 25m

2 stops

5:50 pm - 11:57 am

NRT

STL

32h 07m

2 stops

$958Air Canada

Mon, Sep 7 - Mon, Sep 14

5:42 am - 2:20 pm

STL

HND

18h 38m

1 stop

11:55 am - 10:59 pm

HND

STL

25h 04m

1 stop

$1,071American Airlines

Sun, Aug 30 - Tue, Sep 1

8:50 am - 11:15 pm

STL

OKA

24h 25m

2 stops

8:00 am - 7:16 pm

OKA

STL

25h 16m

2 stops

$1,077ANA

Tue, Aug 18 - Tue, Sep 1

9:30 am - 5:30 pm

STL

FUK

42h 00m

2 stops

12:15 pm - 10:59 pm

FUK

STL

24h 44m

2 stops

$1,095United Airlines

Wed, Aug 19 - Wed, Aug 26

6:15 am - 11:15 pm

STL

OKA

27h 00m

2 stops

11:55 am - 7:16 pm

OKA

STL

21h 21m

2 stops

$1,111ANA

Tue, Aug 18 - Wed, Sep 2

6:36 am - 10:30 pm

STL

OKA

25h 54m

2 stops

10:50 am - 6:05 pm

OKA

STL

21h 15m

2 stops

$1,146American Airlines

Sun, Aug 30 - Sun, Sep 6

8:40 am - 7:35 pm

STL

HIJ

20h 55m

2 stops

12:35 pm - 11:38 pm

HIJ

STL

25h 03m

2 stops

$1,198United Airlines

Tue, Aug 25 - Sat, Aug 29

6:00 am - 9:20 am

STL

OKJ

37h 20m

2 stops

7:25 pm - 10:59 pm

OKJ

STL

41h 34m

2 stops

$1,592Japan Airlines

Sat, Aug 29 - Wed, Sep 2

6:00 am - 9:30 pm

STL

TAK

25h 30m

2 stops

9:45 am - 10:59 pm

TAK

STL

27h 14m

2 stops

$1,681Japan Airlines

Thu, Aug 27 - Mon, Aug 31

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United Airlines flights from St. Louis to Japan

Our best United Airlines deals on St. Louis to Japan flight tickets

United Airlines

Aug 30

STL5:10 amLambert-St Louis

18h 45m

2 stops

HND1:55 pmTokyo Haneda

Aug 31

HND12:30 amTokyo Haneda

23h 40m

2 stops

STL10:10 amLambert-St Louis

$1,077

United Airlines

Aug 30

STL5:30 pmLambert-St Louis

37h 45m

1 stop

HND9:15 pmTokyo Haneda

Sep 2

HND3:45 pmTokyo Haneda

17h 26m

1 stop

STL7:11 pmLambert-St Louis

$1,078

United Airlines

Aug 30

STL1:00 pmLambert-St Louis

36h 55m

1 stop

HND3:55 pmTokyo Haneda

Sep 2

HND3:50 pmTokyo Haneda

16h 49m

1 stop

STL6:39 pmLambert-St Louis

$1,079

Air Canada flights from St. Louis to Japan

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

Air Canada

Sep 28

STL12:10 pmLambert-St Louis

37h 15m

1 stop

NRT3:25 pmTokyo Narita

Oct 13

NRT5:50 pmTokyo Narita

32h 23m

2 stops

STL12:13 pmLambert-St Louis

$957

Air Canada

Sep 7

STL5:30 pmLambert-St Louis

31h 25m

2 stops

NRT2:55 pmTokyo Narita

Sep 14

NRT5:50 pmTokyo Narita

32h 07m

2 stops

STL11:57 amLambert-St Louis

$958

Air Canada

Sep 7

STL12:10 pmLambert-St Louis

37h 15m

1 stop

NRT3:25 pmTokyo Narita

Sep 14

NRT5:50 pmTokyo Narita

38h 51m

1 stop

STL6:41 pmLambert-St Louis

$960

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/28

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Tue 10/13

5:50 pm-12:13 pm

2 stops32h 23m

$957

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/7

5:30 pm-2:55 pm

2 stops31h 25m

Tokyo Narita

Mon 9/14

5:50 pm-11:57 am

2 stops32h 07m

$958

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 8/30

5:42 am-2:20 pm

1 stop18h 38m

Tokyo Haneda

Tue 9/1

11:55 am-10:59 pm

1 stop25h 04m

$1,071

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Tue 8/18

8:50 am-11:15 pm

2 stops24h 25m

Okinawa Naha

Tue 9/1

8:00 am-7:16 pm

2 stops25h 16m

$1,077

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Wed 8/19

9:30 am-5:30 pm

2 stops42h 00m

Fukuoka

Wed 8/26

12:15 pm-10:59 pm

2 stops24h 44m

$1,095

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Tue 8/18

6:15 am-11:15 pm

2 stops27h 00m

Okinawa Naha

Wed 9/2

11:55 am-7:16 pm

2 stops21h 21m

$1,111

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Sun 8/30

6:36 am-10:30 pm

2 stops25h 54m

Okinawa Naha

Sun 9/6

10:50 am-6:05 pm

2 stops21h 15m

$1,146

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Tue 8/25

8:40 am-7:35 pm

2 stops20h 55m

Hiroshima

Sat 8/29

12:35 pm-11:38 pm

2 stops25h 03m

$1,198

St. LouisOkayama

STL - OKJ

STLOKJ

Lambert-St Louis

Sat 8/29

6:00 am-9:20 am

2 stops37h 20m

Okayama

Wed 9/2

7:25 pm-10:59 pm

2 stops41h 34m

$1,592

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Thu 8/27

6:00 am-9:30 pm

2 stops25h 30m

Takamatsu

Mon 8/31

9:45 am-10:59 pm

2 stops27h 14m

$1,681

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 March is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $349. If you aren’t able to travel to Japan during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $383.

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 $1,079 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 $778 on momondo.

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

You could potentially save up to 14% 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 05m
Direct flights	None

The fastest flight from St. Louis to Japan takes 16h 05m

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 June 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 11,644 reviews	Search American Airlines flights
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 11,147 reviews	Search Air Canada flights
United Airlines	PriceFrom $708	Free Cancellation	Rating 7.4 9,785 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.9 8,395 reviews	Search Delta flights
ANA	PriceFrom $777	Free Cancellation	Rating 8.3 1,228 reviews	Search ANA flights
Japan Airlines	PriceFrom $813	Free Cancellation	Rating 8.3 1,836 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.