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

Cathay Pacific, 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 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 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.

$373 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 - 4:10 pm

STL

NRT

17h 15m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

1 stop

$799Air Canada

Thu, Sep 17 - Wed, Sep 30

8:55 am - 4:10 pm

STL

NRT

17h 15m

1 stop

5:50 pm - 6:41 pm

NRT

STL

38h 51m

1 stop

$811Air Canada

Thu, Sep 17 - Wed, Sep 30

2:40 pm - 7:55 pm

STL

HND

39h 15m

2 stops

9:00 pm - 8:20 pm

HND

STL

37h 20m

2 stops

$857Multiple Airlines

Wed, Sep 16 - Thu, Sep 24

8:55 am - 6:10 pm

STL

ITM

19h 15m

2 stops

2:00 pm - 8:20 pm

ITM

STL

20h 20m

2 stops

$885Multiple Airlines

Wed, Sep 23 - Mon, Sep 28

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 8:20 pm

NRT

STL

16h 30m

1 stop

$923ANA

Mon, Sep 7 - Mon, Sep 28

12:10 pm - 3:25 pm

STL

NRT

37h 15m

1 stop

5:50 pm - 8:20 pm

NRT

STL

16h 30m

1 stop

$924ANA

Mon, Sep 7 - Mon, Sep 14

10:21 am - 6:25 pm

STL

HND

17h 04m

1 stop

6:00 pm - 8:17 pm

HND

STL

17h 17m

2 stops

$1,100American Airlines

Tue, Nov 17 - Tue, Nov 24

5:00 am - 3:00 pm

STL

NRT

19h 00m

1 stop

6:00 pm - 9:40 pm

NRT

STL

18h 40m

1 stop

$1,101United Airlines

Tue, Nov 17 - Tue, Nov 24

6:15 am - 3:25 pm

STL

HND

18h 10m

1 stop

6:20 pm - 9:13 pm

HND

STL

17h 53m

1 stop

$1,108United Airlines

Tue, Nov 17 - Tue, Dec 1

5:00 am - 3:40 pm

STL

NRT

19h 40m

1 stop

5:30 pm - 8:19 pm

NRT

STL

17h 49m

1 stop

$1,108American Airlines

Mon, Nov 2 - Tue, Nov 10

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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

Sep 23

STL8:40 amLambert-St Louis

42h 50m

2 stops

FUK5:30 pmFukuoka

Sep 30

FUK12:15 pmFukuoka

48h 15m

3 stops

STL10:30 pmLambert-St Louis

$1,105

United Airlines

Sep 23

STL8:40 amLambert-St Louis

42h 50m

2 stops

FUK5:30 pmFukuoka

Sep 30

FUK12:15 pmFukuoka

24h 44m

2 stops

STL10:59 pmLambert-St Louis

$1,115

United Airlines

Jul 29

STL5:10 amLambert-St Louis

25h 50m

2 stops

HND9:00 pmTokyo Haneda

Jul 31

HND3:45 pmTokyo Haneda

17h 41m

1 stop

STL7:26 pmLambert-St Louis

$1,146

ANA flights from St. Louis to Japan

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

ANA

Sep 7

STL12:10 pmLambert-St Louis

37h 15m

1 stop

NRT3:25 pmTokyo Narita

Sep 14

NRT5:50 pmTokyo Narita

16h 30m

1 stop

STL8:20 pmLambert-St Louis

$924

ANA

Nov 21

STL4:05 pmLambert-St Louis

33h 35m

1 stop

HND4:40 pmTokyo Haneda

Nov 24

HND6:50 pmTokyo Haneda

35h 36m

1 stop

STL3:26 pmLambert-St Louis

$983

ANA

Sep 7

STL8:55 amLambert-St Louis

16h 45m

1 stop

HND3:40 pmTokyo Haneda

Sep 28

HND6:05 pmTokyo Haneda

33h 55m

1 stop

STL2:00 pmLambert-St Louis

$1,029

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 9/17

8:55 am-4:10 pm

1 stop17h 15m

Tokyo Narita

Wed 9/30

5:50 pm-6:41 pm

1 stop38h 51m

$799

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Thu 9/17

8:55 am-4:10 pm

1 stop17h 15m

Tokyo Narita

Wed 9/30

5:50 pm-6:41 pm

1 stop38h 51m

$811

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 9/16

2:40 pm-7:55 pm

2 stops39h 15m

Tokyo Haneda

Thu 9/24

9:00 pm-8:20 pm

2 stops37h 20m

$857

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 9/23

8:55 am-6:10 pm

2 stops19h 15m

Osaka Itami

Mon 9/28

2:00 pm-8:20 pm

2 stops20h 20m

$885

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/7

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Mon 9/28

5:50 pm-8:20 pm

1 stop16h 30m

$923

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/7

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Mon 9/14

5:50 pm-8:20 pm

1 stop16h 30m

$924

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 11/17

10:21 am-6:25 pm

1 stop17h 04m

Tokyo Haneda

Tue 11/24

6:00 pm-8:17 pm

2 stops17h 17m

$1,100

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 11/17

5:00 am-3:00 pm

1 stop19h 00m

Tokyo Narita

Tue 11/24

6:00 pm-9:40 pm

1 stop18h 40m

$1,101

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 11/17

6:15 am-3:25 pm

1 stop18h 10m

Tokyo Haneda

Tue 12/1

6:20 pm-9:13 pm

1 stop17h 53m

$1,108

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 11/2

5:00 am-3:40 pm

1 stop19h 40m

Tokyo Narita

Tue 11/10

5:30 pm-8:19 pm

1 stop17h 49m

$1,108

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 $1,166 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 45m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 45m

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 11,847 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,396 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 10,047 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,487 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,283 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,880 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.