HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Japan

$507+ Cheap flights from St. Louis (STL) to Japan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FUK
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Japan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Japan

Cheapest flights from St. Louis to Japan
Explore the most affordable flight options available from St. Louis to Japan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.

This Justfly.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:15 am
STL
-
OKA
2 stops23h 10m
ANA
Mon 9/288:40 pm
OKA
-
STL
2 stops29h 33m
ANA
Deal found 6/21$887
This SmartFares deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:04 pm
STL
-
NRT
1 stop34h 56m
Multiple Airlines
Thu 9/106:00 pm
NRT
-
STL
1 stop19h 59m
Multiple Airlines
Deal found 6/23$887
This FlightHub deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:15 am
STL
-
HND
1 stop19h 10m
ANA
Fri 9/115:15 pm
HND
-
STL
1 stop15h 01m
ANA
Deal found 6/23$890
This Justfly.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:30 am
STL
-
NRT
1 stop15h 40m
ANA
Tue 9/155:00 pm
NRT
-
STL
1 stop32h 57m
ANA
Deal found 6/20$896
This American Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:30 am
STL
-
HND
1 stop19h 20m
American Airlines
Tue 11/36:00 pm
HND
-
STL
1 stop20h 42m
American Airlines
Deal found 6/20$897
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:30 am
STL
-
HND
1 stop17h 05m
Delta
Wed 11/115:15 pm
HND
-
STL
1 stop14h 39m
Delta
Deal found 6/23$898
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:00 am
STL
-
NRT
1 stop18h 00m
United Airlines
Wed 11/116:00 pm
NRT
-
STL
1 stop18h 13m
United Airlines
Deal found 6/23$898
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:30 pm
STL
-
HND
2 stops29h 35m
Delta
Tue 9/154:05 pm
HND
-
STL
1 stop21h 11m
Delta
Deal found 6/23$903
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:04 pm
STL
-
NRT
1 stop28h 56m
United Airlines
Thu 11/125:40 pm
NRT
-
STL
1 stop14h 03m
United Airlines
Deal found 6/23$903
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:04 pm
STL
-
HND
1 stop35h 01m
United Airlines
Thu 11/1210:25 am
HND
-
STL
1 stop19h 05m
United Airlines
Deal found 6/19$904
This American Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:13 pm
STL
-
NRT
1 stop30h 27m
American Airlines
Thu 11/125:30 pm
NRT
-
STL
1 stop19h 59m
American Airlines
Deal found 6/23$904
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:40 am
STL
-
FUK
2 stops42h 50m
United Airlines
Wed 9/912:15 pm
FUK
-
STL
2 stops37h 42m
United Airlines
Deal found 6/22$905

Find flight deals from St. Louis to Japan

Keep the following information in mind while searching for St. Louis to Japan flight deals. Data was last updated June 23, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$887
(Justfly.com)

One-way from

$507
(SmartFares)

Popular in

June

Cheapest in

February

Average price

$1,389
Provider with most accurate pricing for Lambert-St Louis-Tokyo (TYO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Tokyo (TYO) flights.
Search Deals
From Lambert-St Louis to Japan
Search Deals
One-way flight from Lambert-St Louis to Japan
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($269 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Japan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
Use the filters below to find and compare flights from St. Louis to Japan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisFukuoka

STL - FUK

STLFUK

Lambert-St Louis

Wed 9/2

8:50 am-5:30 pm

2 stops42h 40m

Fukuoka

Tue 9/8

12:15 pm-3:38 pm

2 stops41h 23m

$905

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 8/31

6:54 pm-2:50 pm

2 stops29h 56m

Osaka Kansai Intl

Thu 9/10

4:55 pm-11:40 pm

2 stops20h 45m

$906

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 9/15

5:10 am-2:50 pm

2 stops19h 40m

Osaka Kansai Intl

Tue 9/22

4:55 pm-11:40 pm

2 stops20h 45m

$906

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 9/15

8:00 am-6:55 pm

2 stops20h 55m

Osaka Itami

Tue 9/22

11:00 am-6:16 pm

2 stops21h 16m

$923
Quickest round-trip

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 9/7

7:00 am-2:30 pm

1 stop17h 30m

Tokyo Narita

Mon 9/14

4:30 pm-4:34 pm

1 stop14h 04m

$998

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Sun 9/6

10:33 am-4:15 pm

1 stop15h 42m

Tokyo Haneda

Sun 9/13

4:05 pm-8:31 pm

2 stops18h 26m

$1,003

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 9/6

8:50 am-3:10 pm

1 stop16h 20m

Tokyo Narita

Sun 9/13

4:45 pm-9:36 pm

2 stops18h 51m

$1,003

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 8/10

9:20 am-6:55 pm

2 stops19h 35m

Osaka Itami

Tue 11/10

7:30 am-2:30 pm

2 stops22h 00m

$1,018

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 9/13

5:10 am-2:50 pm

2 stops19h 40m

Osaka Kansai Intl

Sun 9/20

4:55 pm-3:38 pm

2 stops36h 43m

$1,018

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 8/2

1:13 pm-7:25 am

2 stops28h 12m

Osaka Itami

Mon 11/2

8:20 pm-12:06 pm

2 stops30h 46m

$1,078

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/19

Showing 1-10 of 52 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from St. Louis to Japan

Have a flexible travel schedule? Discover the best time to fly to Japan from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Japan

What is the cheapest month to book a flight from St. Louis to Japan?

Currently, March is the cheapest month in which you can book a flight from St. Louis to Japan (average of $349). Flying from St. Louis to Japan in June is currently the most expensive (average of $667). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How far ahead should I book a flight from St. Louis to Japan?

The price you pay for your flight from St. Louis to Japan may vary depending on when you book. For the best chance of a lower fare, look to book 4 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Japan

Get insights into the airlines that provide service to Japan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Japan. Reviews last updated June 23, 2026.
Read through reviews of airlines operating flights from St. Louis to Japan, such as Japan Airlines,ANA, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.
Japan Airlines
8.3
Very good
1,849 reviews
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.
ANA
8.3
Very good
1,251 reviews
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.
Delta
7.8
Good
8,430 reviews
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.
United Airlines
7.4
Good
9,879 reviews
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.
Air Canada
7.1
Good
11,251 reviews
Japan Airlines
8.3
Very good
1,849 reviews

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

BKK - NRT

Everything was was a great experience, the staff was very friendly and always had a smile on the face.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Japan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Japan?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Japan. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Japan?

    Airlines like United Airlines, ANA, and Delta fly from St. Louis to Japan in about 15h 42m. The time it takes to get you to your destination can typically vary by up to 26h 58m. St. Louis and Japan are separated by a distance of 6383 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to Japan one-way?

    The cheapest airlines for a one-way flight from St. Louis to Japan are United Airlines ($384), Japan Airlines ($433), and American Airlines ($434).

  • What are the most popular routes from St. Louis to Japan?

    While some choose either Lambert-St Louis - Tokyo Haneda or Lambert-St Louis - Osaka Kansai Intl, Lambert-St Louis - Tokyo Narita is the most popular route from St. Louis to Japan.

  • Can I find deals for flights from St. Louis to Japan that include hotel bookings?

    Yes. In addition to deals on St. Louis to Japan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Japan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Japan.

  • Can I find deals for business class flights from St. Louis to Japan?

    Yes. Cheapflights offers flight deals from St. Louis to Japan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Japan?

    Currently, March is the cheapest month in which you can book a flight from St. Louis to Japan (average of $349). Flying from St. Louis to Japan in June is currently the most expensive (average of $667). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from St. Louis to Japan

Discover the top 6 airlines that operate flights from St. Louis to Japan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$593Average$1,161FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$667Average$1,171FlexibilityNo cancel feeOn-time67%
DeltaCheapest$739Average$1,087FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$757Average$1,145FlexibilityNo cancel feeOn-time69%
ANACheapest$785Average$1,158FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$846Average$1,208FlexibilityNo cancel feeOn-time79%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.