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

Air Canada, ANA, and Japan Airlines 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 46% 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 December 2025.

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.

$347 Cheap Flights from St. Louis to Japan in 2025/26

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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.

4:05 pm - 4:40 pm

STL

HND

33h 35m1 stop

6:50 pm - 3:29 pm

HND

STL

34h 39m1 stop

$640Air Canada

Tue, Feb 17 - Tue, Mar 10

4:05 pm - 4:20 pm

STL

NRT

33h 15m2 stops

6:45 pm - 3:29 pm

NRT

STL

35h 44m1 stop

$641Air Canada

Mon, Feb 9 - Fri, Feb 27

7:41 am - 5:45 pm

STL

HND

19h 04m1 stop

6:20 pm - 7:19 pm

HND

STL

15h 59m1 stop

$690ANA

Mon, Feb 23 - Thu, Mar 5

6:00 am - 7:25 pm

STL

KIX

22h 25m2 stops

6:35 pm - 12:25 pm

KIX

STL

32h 50m2 stops

$713United Airlines

Sun, Feb 15 - Sat, Feb 28

12:15 pm - 7:25 pm

STL

OKA

64h 10m2 stops

12:10 pm - 8:23 pm

OKA

STL

23h 13m2 stops

$714United Airlines

Thu, Feb 19 - Mon, Mar 2

6:30 am - 7:30 am

STL

ITM

34h 00m2 stops

7:05 am - 10:36 am

ITM

STL

18h 31m2 stops

$751ANA

Sun, Feb 1 - Sun, Feb 15

2:24 pm - 9:15 am

STL

OKA

27h 51m2 stops

1:40 pm - 11:48 pm

OKA

STL

25h 08m2 stops

$780American Airlines

Thu, Feb 19 - Mon, Mar 2

1:35 pm - 9:15 am

STL

OKA

28h 40m2 stops

1:45 pm - 7:29 pm

OKA

STL

20h 44m2 stops

$808American Airlines

Thu, Jan 22 - Thu, Jan 29

6:00 am - 7:20 pm

STL

FUK

22h 20m2 stops

8:00 pm - 6:14 pm

FUK

STL

37h 14m2 stops

$873Japan Airlines

Tue, Jan 6 - Tue, Jan 13

1:40 pm - 9:30 am

STL

OKJ

28h 50m2 stops

10:15 am - 11:59 pm

OKJ

STL

28h 44m2 stops

$931Japan Airlines

Sat, Jan 31 - Wed, Feb 4

Japan Airlines flights from St. Louis to Japan

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

Japan Airlines

Feb 14

STL2:26 pmLambert-St Louis

16h 34m

1 stop

HND10:00 pmTokyo Haneda

Feb 21

HND10:50 amTokyo Haneda

18h 06m

1 stop

STL1:56 pmLambert-St Louis

$814

Find similar

Japan Airlines

Feb 2

STL7:04 amLambert-St Louis

20h 46m

1 stop

KIX6:50 pmOsaka Kansai Intl

Feb 18

KIX5:50 pmOsaka Kansai Intl

20h 58m

1 stop

STL11:48 pmLambert-St Louis

$824

Find similar

Japan Airlines

Feb 4

STL6:00 amLambert-St Louis

22h 20m

2 stops

ITM7:20 pmOsaka Itami

Feb 18

ITM8:30 amOsaka Itami

20h 24m

2 stops

STL1:54 pmLambert-St Louis

$825

Find similar

ANA flights from St. Louis to Japan

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

ANA

Feb 23

STL7:41 amLambert-St Louis

19h 04m

1 stop

HND5:45 pmTokyo Haneda

Mar 5

HND6:20 pmTokyo Haneda

15h 59m

1 stop

STL7:19 pmLambert-St Louis

$690

Find similar

ANA

Feb 1

STL6:30 amLambert-St Louis

34h 00m

2 stops

ITM7:30 amOsaka Itami

Feb 15

ITM7:05 amOsaka Itami

18h 31m

2 stops

STL10:36 amLambert-St Louis

$751

Find similar

ANA

Feb 9

STL6:00 amLambert-St Louis

18h 30m

1 stop

NRT3:30 pmTokyo Narita

Feb 27

NRT5:05 pmTokyo Narita

15h 40m

1 stop

STL5:45 pmLambert-St Louis

$763

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 2/17

4:05 pm-4:40 pm

1 stop33h 35m

Tokyo Haneda

Tue 3/10

6:50 pm-3:29 pm

1 stop34h 39m

$640

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/9

4:05 pm-4:20 pm

2 stops33h 15m

Tokyo Narita

Fri 2/27

6:45 pm-3:29 pm

1 stop35h 44m

$641

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/23

7:41 am-5:45 pm

1 stop19h 04m

Tokyo Haneda

Thu 3/5

6:20 pm-7:19 pm

1 stop15h 59m

$690

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:00 am-7:25 pm

2 stops22h 25m

Osaka Kansai Intl

Sat 2/28

6:35 pm-12:25 pm

2 stops32h 50m

$713

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 2/19

12:15 pm-7:25 pm

2 stops64h 10m

Okinawa Naha

Mon 3/2

12:10 pm-8:23 pm

2 stops23h 13m

$714

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/1

6:30 am-7:30 am

2 stops34h 00m

Osaka Itami

Sun 2/15

7:05 am-10:36 am

2 stops18h 31m

$751

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 2/19

2:24 pm-9:15 am

2 stops27h 51m

Okinawa Naha

Mon 3/2

1:40 pm-11:48 pm

2 stops25h 08m

$780

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Thu 1/22

1:35 pm-9:15 am

2 stops28h 40m

Okinawa Naha

Thu 1/29

1:45 pm-7:29 pm

2 stops20h 44m

$808

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Tue 1/6

6:00 am-7:20 pm

2 stops22h 20m

Fukuoka

Tue 1/13

8:00 pm-6:14 pm

2 stops37h 14m

$873

St. LouisOkayama

STL - OKJ

STLOKJ

Lambert-St Louis

Sat 1/31

1:40 pm-9:30 am

2 stops28h 50m

Okayama

Wed 2/4

10:15 am-11:59 pm

2 stops28h 44m

$931

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 September is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $738. If you aren’t able to travel to Japan during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $789.

What is the cheapest day to depart on your flight to Japan?

On average, the least expensive day to fly to Japan from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $1,209. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Japan on a Friday will generally be more expensive and average around $1,457. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Japan?

Flying to Japan from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,103 when looking at flights departing at noon. In the morning is when there is more demand to fly to Japan, so prices are often more expensive at around $1,308 per ticket.

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

You could potentially save up to 22% 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 25m
Direct flights	None

The fastest flight from St. Louis to Japan takes 15h 25m

There are no direct flights from St. Louis to Japan. There are no popular flight routes from St. Louis to Japan.

Search flight deals

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 December 2025.
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
Air Canada	PriceFrom $629	Free Cancellation	Rating 7.1 10,513 reviews	Search Air Canada flights
American Airlines	PriceFrom $633	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $691	Free Cancellation	Rating 8.3 1,651 reviews	Search Japan Airlines flights
ANA	PriceFrom $703	Free Cancellation	Rating 8.4 1,020 reviews	Search ANA flights
United Airlines	PriceFrom $716	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
Delta	PriceFrom $722	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta 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.