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$370+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FUK
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap 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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$684
(Air Canada)

One-way from

$370
(Air Canada)

Popular in

June

Cheapest in

September

Average price

$858
Provider with most accurate pricing for Lambert-St Louis-Tokyo (TYO) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Tokyo (TYO) flights.
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From Lambert-St Louis to Japan
Search Deals
One-way flight from Lambert-St Louis to Japan
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Highest demand for flights based on searches. 19% potential increase in price ($234 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 6, 2025.

This Air Canada deal was found by Cheapflights users on 11/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:05 pmSTL - KIX
2 stops39h 15mMultiple Airlines
Sat 12/203:00 pmKIX - STL
2 stops39h 29mMultiple Airlines
Deal found 11/5$804
This FlightHub deal was found by Cheapflights users on 11/4. 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.
Wed 11/56:30 amSTL - HND
1 stop20h 15mANA
Sun 11/236:20 pmHND - STL
1 stop16h 19mANA
Deal found 11/4$809
This Air Canada deal was found by Cheapflights users on 11/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:42 pmSTL - NRT
2 stops30h 48mAir Canada
Thu 12/116:45 pmNRT - STL
2 stops35h 44mAir Canada
Deal found 11/6$812
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/188:25 amSTL - HND
1 stop17h 25mUnited Airlines
Sun 11/2310:50 amHND - STL
1 stop20h 00mUnited Airlines
Deal found 11/4$816
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Tue 12/26:15 amSTL - NRT
1 stop18h 15mUnited Airlines
Sat 12/134:45 pmNRT - STL
1 stop14h 44mUnited Airlines
Deal found 11/3$817
This Air Canada deal was found by Cheapflights users on 11/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:05 pmSTL - NRT
1 stop33h 25mAir Canada
Sat 12/136:45 pmNRT - STL
2 stops19h 00mAir Canada
Deal found 11/4$819
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/110:00 amSTL - HND
1 stop16h 45mUnited Airlines
Fri 12/1212:50 amHND - STL
2 stops26h 25mUnited Airlines
Deal found 11/4$820
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Fri 11/710:00 amSTL - HND
1 stop16h 45mUnited Airlines
Sun 11/94:25 pmHND - STL
1 stop15h 02mUnited Airlines
Deal found 11/3$831
This Air Canada deal was found by Cheapflights users on 11/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:05 pmSTL - HND
1 stop33h 35mAir Canada
Fri 1/166:50 pmHND - STL
2 stops31h 02mAir Canada
Deal found 11/5$833
This Air Canada deal was found by Cheapflights users on 11/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/184:05 pmSTL - NRT
2 stops33h 25mAir Canada
Sun 11/236:45 pmNRT - STL
2 stops31h 06mAir Canada
Deal found 11/4$833
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:05 pmSTL - NRT
1 stop33h 25mAir Canada
Sun 12/216:15 pmNRT - STL
2 stops36h 14mAir Canada
Deal found 11/6$838
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/16:43 pmSTL - OKA
2 stops37h 22mUnited Airlines
Tue 12/1612:15 pmOKA - STL
2 stops39h 00mUnited Airlines
Deal found 11/6$839

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 November 6, 2025.
Use the filters below to find and compare flights from St. Louis to Japan that are best for you.

Fly from

St. Louis

Fly to

Japan

Route

Depart

Return

Price

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

4:05 pm-7:25 pm

2 stops36h 20m

Osaka Kansai Intl

Thu 2/19

3:45 pm-3:29 pm

2 stops38h 44m

$687

St. LouisHiroshima

STL - HIJ

STLHIJ

Lambert-St Louis

Mon 2/9

8:05 am-9:10 pm

2 stops22h 05m

Hiroshima

Mon 2/23

7:35 am-7:19 pm

2 stops26h 44m

$729

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

6:42 pm-4:40 pm

2 stops30h 58m

Osaka Kansai Intl

Fri 12/12

6:35 pm-12:15 pm

2 stops32h 40m

$793

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

4:05 pm-10:20 pm

2 stops39h 15m

Osaka Kansai Intl

Sat 12/20

3:00 pm-3:29 pm

2 stops39h 29m

$804

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 12/2

6:15 am-3:30 pm

1 stop18h 15m

Tokyo Narita

Sat 12/13

4:45 pm-4:29 pm

1 stop14h 44m

$817

St. LouisOkinawa

STL - OKA

STLOKA

Lambert-St Louis

Mon 12/1

6:43 pm-11:05 pm

2 stops37h 22m

Okinawa Naha

Tue 12/16

12:15 pm-12:15 pm

2 stops39h 00m

$839

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 11/18

7:00 am-4:00 pm

1 stop18h 00m

Tokyo Narita

Sun 11/23

6:30 pm-11:54 pm

1 stop20h 24m

$842

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Wed 11/12

6:30 am-3:40 pm

2 stops18h 10m

Tokyo Narita

Wed 11/26

5:30 pm-9:40 pm

2 stops19h 10m

$844

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Thu 1/1

6:05 am-3:20 pm

1 stop18h 15m

Tokyo Haneda

Sat 1/17

4:25 pm-4:38 pm

1 stop15h 13m

$846

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Fri 12/5

8:30 am-4:50 pm

1 stop17h 20m

Tokyo Haneda

Sat 12/13

4:25 pm-4:29 pm

1 stop15h 04m

$847

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 53 results
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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, September is the cheapest month in which you can book a flight from St. Louis to Japan (average of $593). Flying from St. Louis to Japan in June is currently the most expensive (average of $934). 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.

What is the cheapest time of day to fly from STL to JP?

Find hourly flight availability from St. Louis to Japan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 4% on flights from St. Louis to Japan by exploring options for tickets in the evening.

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 November 6, 2025.
Read through reviews of airlines operating flights from St. Louis to Japan, such as Japan Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Japan Airlines
8.3
Very good
1,604 reviews
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Delta
7.9
Good
8,001 reviews
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
United Airlines
7.4
Good
9,003 reviews
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
American Airlines
7.2
Good
11,040 reviews
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Air Canada
7.1
Good
10,412 reviews
Japan Airlines
8.3
Very good
1,604 reviews

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.

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 Air Canada, ANA, and United Airlines fly from St. Louis to Japan in about 22h 05m. The time it takes to get you to your destination can typically vary by up to 14h 15m. St. Louis and Japan are separated by a distance of 6667 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 ANA ($379), Air Canada ($393), and United Airlines ($399).

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

    While some choose either Lambert-St Louis - Tokyo Haneda or Lambert-St Louis - Okinawa Naha, 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, September is the cheapest month in which you can book a flight from St. Louis to Japan (average of $593). Flying from St. Louis to Japan in June is currently the most expensive (average of $934). 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

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$629Average$886FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$633Average$942FlexibilityNo cancel feeOn-time71%
ANACheapest$703Average$976FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$703Average$899FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$716Average$1,052FlexibilityNo cancel feeOn-time69%
DeltaCheapest$722Average$966FlexibilityNo cancel feeOn-timeN/A

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