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$343+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FUK
jul. 16 — jul. 231
mié. 7/16
mié. 7/23
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 julio 11, 2025.

Round-trip from

$623
(Air Canada)

One-way from

$343
(Air Canada)

Popular in

June

Cheapest in

September

Average price

$1,167
From Lambert-St Louis to Japan
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One-way flight from Lambert-St Louis to Japan
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Highest demand for flights based on searches. 16% potential increase in price ($195 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 11, 2025.

This Air Canada deal was found by Cheapflights users on 7/10. 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.
sáb. 10/41:30 pmSTL - NRT
1 stop35h 55mAir Canada
mar. 10/145:35 pmNRT - STL
2 stops31h 14mAir Canada
Deal found 7/10$623
This Air Canada deal was found by Cheapflights users on 7/9. 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.
mié. 9/179:15 amSTL - HND
1 stop16h 35mAir Canada
mié. 10/16:10 pmHND - STL
2 stops30h 39mAir Canada
Deal found 7/9$634
This Air Canada deal was found by Cheapflights users on 7/9. 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.
sáb. 9/201:30 pmSTL - KIX
2 stops36h 55mAir Canada
dom. 9/286:05 pmKIX - STL
2 stops32h 23mAir Canada
Deal found 7/9$654
This Air Canada deal was found by Cheapflights users on 7/9. 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.
dom. 9/284:05 pmSTL - KIX
2 stops34h 20mMultiple Airlines
vie. 10/317:25 amKIX - STL
2 stops46h 04mMultiple Airlines
Deal found 7/9$655
This Alaska Airlines deal was found by Cheapflights users on 7/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/187:00 amSTL - NRT
1 stop18h 00mAlaska Airlines
vie. 12/56:25 pmNRT - STL
1 stop20h 31mAlaska Airlines
Deal found 7/9$672
This IEagle deal was found by Cheapflights users on 7/8. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/87:00 amSTL - NRT
1 stop18h 00mHawaiian Airlines
mar. 11/186:25 pmNRT - STL
1 stop35h 40mHawaiian Airlines
Deal found 7/8$678
This FlightHub deal was found by Cheapflights users on 7/9. 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.
jue. 10/24:05 pmSTL - ITM
2 stops36h 50mAir Canada
mié. 10/294:00 pmITM - STL
2 stops37h 29mAir Canada
Deal found 7/9$690
This Air Canada deal was found by Cheapflights users on 7/10. 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.
lun. 12/86:45 pmSTL - HND
2 stops30h 55mMultiple Airlines
sáb. 12/206:50 pmHND - STL
2 stops32h 30mMultiple Airlines
Deal found 7/10$699
This FlightHub deal was found by Cheapflights users on 7/10. 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.
mié. 11/126:15 amSTL - HND
1 stop18h 05mANA
mié. 11/266:20 pmHND - STL
1 stop16h 05mANA
Deal found 7/10$751
This FlightHub deal was found by Cheapflights users on 7/10. 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.
lun. 12/86:15 amSTL - KIX
2 stops24h 35mANA
sáb. 12/206:50 amKIX - STL
2 stops20h 30mANA
Deal found 7/10$755
This FlightHub deal was found by Cheapflights users on 7/9. 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.
vie. 10/33:23 pmSTL - ITM
2 stops26h 02mANA
vie. 10/317:30 amITM - STL
2 stops18h 43mANA
Deal found 7/9$756
This United Airlines deal was found by Cheapflights users on 7/9. 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.
mar. 11/1810:30 amSTL - HND
1 stop19h 35mUnited Airlines
jue. 11/2710:25 amHND - STL
1 stop18h 55mUnited Airlines
Deal found 7/9$758

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 julio 11, 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. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

sáb. 10/4

1:30 pm-3:25 pm

1 stop35h 55m

Tokyo Narita

mar. 10/14

5:35 pm-10:49 am

2 stops31h 14m

$623

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

mié. 9/17

9:15 am-3:50 pm

1 stop16h 35m

Tokyo Haneda

mié. 10/1

6:10 pm-10:49 am

2 stops30h 39m

$634

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

sáb. 9/20

1:30 pm-4:25 pm

2 stops36h 55m

Osaka Kansai Intl

dom. 9/28

6:05 pm-12:28 pm

2 stops32h 23m

$654

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

dom. 9/28

4:05 pm-4:25 pm

2 stops34h 20m

Osaka Kansai Intl

vie. 10/31

7:25 am-3:29 pm

2 stops46h 04m

$655

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

jue. 10/2

4:05 pm-6:55 pm

2 stops36h 50m

Osaka Itami

mié. 10/29

4:00 pm-3:29 pm

2 stops37h 29m

$690

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

dom. 8/31

6:00 am-4:00 pm

1 stop20h 00m

Tokyo Narita

lun. 9/8

6:25 pm-11:59 pm

1 stop19h 34m

$726

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

sáb. 8/30

6:00 am-4:00 pm

1 stop20h 00m

Tokyo Narita

lun. 9/8

6:25 pm-11:59 pm

1 stop19h 34m

$731

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

vie. 10/3

3:23 pm-7:25 am

2 stops26h 02m

Osaka Itami

vie. 10/31

7:30 am-12:13 pm

2 stops18h 43m

$756

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

jue. 10/2

12:25 pm-9:15 pm

1 stop18h 50m

Tokyo Haneda

mié. 10/29

10:50 am-3:50 pm

1 stop19h 00m

$756

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

sáb. 9/27

5:47 pm-4:30 am

1 stop20h 43m

Tokyo Haneda

jue. 10/30

10:50 am-9:59 pm

1 stop25h 09m

$762

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

Showing 1-10 of 49 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, February is the cheapest month in which you can book a flight from St. Louis to Japan (average of $873). Flying from St. Louis to Japan in December is currently the most expensive (average of $1,622). 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 julio 11, 2025.

When flying from St. Louis to Japan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 julio 11, 2025.
Read through reviews of airlines operating flights from St. Louis to Japan, such as EVA Air, ANA, and Korean Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,215 reviews
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
ANA
8.4
Very good
899 reviews
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,105 reviews
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,512 reviews
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,215 reviews

Boarding

8.4

Crew

8.6

Entertainment

8.0

Comfort

8.3

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

  • 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 Air Canada ($343), Alaska Airlines ($422), and American Airlines ($441).

  • 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 Itami, 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, February is the cheapest month in which you can book a flight from St. Louis to Japan (average of $873). Flying from St. Louis to Japan in December is currently the most expensive (average of $1,622). 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 julio 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$629Average$921FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$691Average$943FlexibilityNo cancel feeOn-time79%
ANACheapest$714Average$1,111FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$716Average$1,136FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$719Average$1,104FlexibilityNo cancel feeOn-time71%
DeltaCheapest$730Average$1,405FlexibilityNo cancel feeOn-timeN/A

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