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

Air Canada, United Airlines, 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 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.

$458 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.

3:04 pm - 4:00 pm

STL

NRT

34h 56m

1 stop

6:00 pm - 11:59 pm

NRT

STL

19h 59m

1 stop

$887Multiple Airlines

Tue, Sep 1 - Thu, Sep 10

6:15 am - 3:25 pm

STL

HND

18h 10m

1 stop

10:25 am - 12:06 pm

HND

STL

16h 41m

1 stop

$890ANA

Tue, Dec 1 - Thu, Dec 10

8:00 am - 9:15 pm

STL

HND

23h 15m

1 stop

5:15 pm - 7:31 pm

HND

STL

16h 16m

1 stop

$892ANA

Tue, Sep 1 - Wed, Sep 16

7:33 am - 9:05 pm

STL

HND

22h 32m

1 stop

6:25 pm - 10:10 pm

HND

STL

18h 45m

1 stop

$898United Airlines

Tue, Nov 3 - Tue, Nov 10

5:00 am - 3:15 pm

STL

NRT

19h 15m

1 stop

6:00 pm - 6:06 pm

NRT

STL

15h 06m

1 stop

$898United Airlines

Wed, Nov 4 - Wed, Nov 25

5:23 pm - 1:05 pm

STL

HND

29h 42m

2 stops

4:05 pm - 11:16 pm

HND

STL

21h 11m

1 stop

$903Delta

Mon, Aug 31 - Wed, Sep 16

12:10 pm - 4:25 pm

STL

KIX

38h 15m

2 stops

7:25 pm - 3:26 pm

KIX

STL

34h 01m

2 stops

$1,004Air Canada

Sun, Oct 11 - Thu, Oct 29

6:30 am - 7:50 pm

STL

ITM

23h 20m

2 stops

4:50 pm - 11:40 pm

ITM

STL

20h 50m

2 stops

$1,155Japan Airlines

Tue, Sep 15 - Tue, Sep 22

4:05 pm - 7:40 pm

STL

HIJ

36h 35m

2 stops

3:55 pm - 3:26 pm

HIJ

STL

38h 31m

2 stops

$1,751Air Canada

Sun, Nov 1 - Thu, Nov 5

9:32 am - 9:30 pm

STL

TAK

21h 58m

2 stops

1:10 pm - 11:40 pm

TAK

STL

24h 30m

2 stops

$2,007Japan Airlines

Sun, Sep 6 - Thu, Sep 10

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Qatar Airways flights from St. Louis to Japan

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

Qatar Airways

Nov 1

STL2:50 pmLambert-St Louis

51h 10m

3 stops

FUK9:00 amFukuoka

Nov 30

FUK8:05 pmFukuoka

39h 50m

3 stops

STL8:55 pmLambert-St Louis

$1,883

Qatar Airways

Jul 1

STL9:39 amLambert-St Louis

57h 16m

3 stops

OKA8:55 amOkinawa Naha

Jul 8

OKA3:30 pmOkinawa Naha

46h 29m

3 stops

STL11:59 pmLambert-St Louis

$2,531

Cathay Pacific flights from St. Louis to Japan

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

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

$1,408

Cathay Pacific

Nov 25

STL11:39 amLambert-St Louis

36h 41m

2 stops

FUK3:20 pmFukuoka

Nov 30

FUK4:30 pmFukuoka

46h 12m

2 stops

STL11:42 pmLambert-St Louis

$1,417

Cathay Pacific

Jul 3

STL5:13 pmLambert-St Louis

38h 22m

2 stops

HND9:35 pmTokyo Haneda

Jul 10

HND9:55 amTokyo Haneda

25h 53m

2 stops

STL9:48 pmLambert-St Louis

$1,973

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 9/1

3:04 pm-4:00 pm

1 stop34h 56m

Tokyo Narita

Thu 9/10

6:00 pm-11:59 pm

1 stop19h 59m

$887

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 12/1

6:15 am-3:25 pm

1 stop18h 10m

Tokyo Haneda

Thu 12/10

10:25 am-12:06 pm

1 stop16h 41m

$890

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/1

8:00 am-9:15 pm

1 stop23h 15m

Tokyo Haneda

Wed 9/16

5:15 pm-7:31 pm

1 stop16h 16m

$892

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 11/3

7:33 am-9:05 pm

1 stop22h 32m

Tokyo Haneda

Tue 11/10

6:25 pm-10:10 pm

1 stop18h 45m

$898

Quickest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 11/4

5:00 am-3:15 pm

1 stop19h 15m

Tokyo Narita

Wed 11/25

6:00 pm-6:06 pm

1 stop15h 06m

$898

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 8/31

5:23 pm-1:05 pm

2 stops29h 42m

Tokyo Haneda

Wed 9/16

4:05 pm-11:16 pm

1 stop21h 11m

$903

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 10/11

12:10 pm-4:25 pm

2 stops38h 15m

Osaka Kansai Intl

Thu 10/29

7:25 pm-3:26 pm

2 stops34h 01m

$1,004

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

6:30 am-7:50 pm

2 stops23h 20m

Osaka Itami

Tue 9/22

4:50 pm-11:40 pm

2 stops20h 50m

$1,155

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Sun 11/1

4:05 pm-7:40 pm

2 stops36h 35m

Hiroshima

Thu 11/5

3:55 pm-3:26 pm

2 stops38h 31m

$1,751

St. LouisTakamatsu

STL - TAK

STLTAK

Lambert-St Louis

Sun 9/6

9:32 am-9:30 pm

2 stops21h 58m

Takamatsu

Thu 9/10

1:10 pm-11:40 pm

2 stops24h 30m

$2,007

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 $1,122 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 22m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 22m

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 11,770 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,270 reviews	Search Air Canada flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,449 reviews	Search Delta flights
United Airlines	PriceFrom $757	Free Cancellation	Rating 7.4 9,894 reviews	Search United Airlines flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,258 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,852 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.