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

Air Canada, Cathay Pacific, 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 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.

$421 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.

7:33 am - 4:40 pm-

42h 07m

6:45 pm - 9:13 pm-

41h 28m

$820Air Canada

Tue, Dec 1 - Mon, Dec 7

7:04 pm - 4:30 pm-

30h 26m

6:45 pm - 2:30 pm-

34h 45m

$823Air Canada

Sat, Dec 5 - Mon, Dec 14

8:55 am - 3:40 pm-

16h 45m

1:40 pm - 8:20 pm-

20h 40m

$972Multiple Airlines

Mon, Sep 21 - Wed, Sep 30

12:10 pm - 3:25 pm-

37h 15m

5:50 pm - 6:41 pm-

38h 51m

$1,027ANA

Mon, Sep 21 - Wed, Sep 30

4:05 pm - 8:20 pm-

37h 15m

3:00 pm - 3:26 pm-

39h 26m

$1,030Multiple Airlines

Sat, Jan 16 - Mon, Jan 25

8:55 am - 3:40 pm-

16h 45m

6:05 pm - 8:20 pm-

16h 15m

$1,049ANA

Mon, Sep 21 - Wed, Sep 30

5:42 am - 2:20 pm-

18h 38m

5:25 pm - 10:59 pm-

19h 34m

$1,107American Airlines

Tue, Sep 1 - Tue, Sep 8

8:30 am - 7:20 pm-

20h 50m

1:25 pm - 6:38 pm-

19h 13m

$1,107American Airlines

Tue, Sep 15 - Tue, Sep 22

7:30 am - 5:45 pm-

19h 15m

6:20 pm - 9:13 pm-

17h 53m

$1,108United Airlines

Tue, Nov 17 - Tue, Dec 1

7:30 am - 3:00 pm-

16h 30m

6:00 pm - 9:13 pm-

18h 13m

$1,108United Airlines

Mon, Nov 16 - Tue, Dec 1

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American Airlines flights from St. Louis to Japan

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

American Airlines

Sep 15

STL8:30 amLambert-St Louis

20h 50m

2 stops

FUK7:20 pmFukuoka

Sep 22

FUK1:25 pmFukuoka

19h 13m

2 stops

STL6:38 pmLambert-St Louis

$1,107

American Airlines

Sep 15

STL6:30 amLambert-St Louis

22h 15m

1 stop

KIX6:45 pmOsaka Kansai Intl

Sep 22

KIX5:45 pmOsaka Kansai Intl

19h 45m

1 stop

STL11:30 pmLambert-St Louis

$1,111

American Airlines

Sep 15

STL11:01 amLambert-St Louis

21h 29m

2 stops

OKA10:30 pmOkinawa Naha

Sep 22

OKA7:25 amOkinawa Naha

23h 23m

2 stops

STL4:48 pmLambert-St Louis

$1,115

ANA flights from St. Louis to Japan

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

ANA

Sep 21

STL8:55 amLambert-St Louis

16h 45m

1 stop

HND3:40 pmTokyo Haneda

Sep 30

HND6:05 pmTokyo Haneda

16h 15m

1 stop

STL8:20 pmLambert-St Louis

$1,049

ANA

Aug 23

STL9:30 amLambert-St Louis

15h 55m

1 stop

HND3:25 pmTokyo Haneda

Sep 8

HND5:15 pmTokyo Haneda

16h 01m

1 stop

STL7:16 pmLambert-St Louis

$1,105

ANA

Aug 5

STL1:13 pmLambert-St Louis

32h 52m

2 stops

ITM12:05 pmOsaka Itami

Aug 14

ITM8:00 amOsaka Itami

18h 02m

2 stops

STL12:02 pmLambert-St Louis

$1,167

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 12/1

7:33 am-4:40 pm

2 stops42h 07m

Tokyo Narita

Mon 12/7

6:45 pm-9:13 pm

2 stops41h 28m

$820

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 12/5

7:04 pm-4:30 pm

2 stops30h 26m

Tokyo Narita

Mon 12/14

6:45 pm-2:30 pm

2 stops34h 45m

$823

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 9/21

8:55 am-3:40 pm

1 stop16h 45m

Tokyo Haneda

Wed 9/30

1:40 pm-8:20 pm

2 stops20h 40m

$972

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/21

12:10 pm-3:25 pm

1 stop37h 15m

Tokyo Narita

Wed 9/30

5:50 pm-6:41 pm

1 stop38h 51m

$1,027

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 1/16

4:05 pm-8:20 pm

2 stops37h 15m

Osaka Itami

Mon 1/25

3:00 pm-3:26 pm

2 stops39h 26m

$1,030

Quickest round-trip

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 9/21

8:55 am-3:40 pm

1 stop16h 45m

Tokyo Haneda

Wed 9/30

6:05 pm-8:20 pm

1 stop16h 15m

$1,049

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 9/1

5:42 am-2:20 pm

1 stop18h 38m

Tokyo Haneda

Tue 9/8

5:25 pm-10:59 pm

1 stop19h 34m

$1,107

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Tue 9/15

8:30 am-7:20 pm

2 stops20h 50m

Fukuoka

Tue 9/22

1:25 pm-6:38 pm

2 stops19h 13m

$1,107

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 11/17

7:30 am-5:45 pm

1 stop19h 15m

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 11/16

7:30 am-3:00 pm

1 stop16h 30m

Tokyo Narita

Tue 12/1

6:00 pm-9:13 pm

1 stop18h 13m

$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 $819. 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 30m
Direct flights	None

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 11,844 reviews	Search American Airlines flights
Air Canada	PriceFrom $667	Free Cancellation	Rating 7.1 11,424 reviews	Search Air Canada flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 10,060 reviews	Search United Airlines flights
Delta	PriceFrom $739	Free Cancellation	Rating 7.8 8,483 reviews	Search Delta flights
ANA	PriceFrom $785	Free Cancellation	Rating 8.3 1,290 reviews	Search ANA flights
Japan Airlines	PriceFrom $846	Free Cancellation	Rating 8.3 1,889 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.