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$340+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FUK
Jan 4 — Jan 111
Sun 1/4
Sun 1/11
1 adult, Economy
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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 December 5, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amSTL - NRT
1 stop18h 00mAlaska Airlines
Thu 12/116:30 pmNRT - STL
1 stop20h 29mAlaska Airlines
Deal found 12/3$698
This Alaska Airlines deal was found by Cheapflights users on 12/2. 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.
Wed 12/37:00 amSTL - NRT
1 stop18h 00mAlaska Airlines
Wed 12/106:30 pmNRT - STL
1 stop34h 57mAlaska Airlines
Deal found 12/2$706
This Alaska Airlines deal was found by Cheapflights users on 12/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:00 amSTL - NRT
1 stop18h 00mAlaska Airlines
Mon 12/156:30 pmNRT - STL
1 stop20h 29mAlaska Airlines
Deal found 12/3$770
This Air Canada deal was found by Cheapflights users on 12/2. 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.
Wed 12/34:05 pmSTL - HND
1 stop33h 35mAir Canada
Wed 12/106:50 pmHND - STL
2 stops32h 25mAir Canada
Deal found 12/2$771
This Air Canada deal was found by Cheapflights users on 12/2. 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.
Wed 12/34:05 pmSTL - NRT
2 stops33h 15mAir Canada
Wed 12/106:45 pmNRT - STL
2 stops32h 30mAir Canada
Deal found 12/2$773
This Alaska Airlines deal was found by Cheapflights users on 12/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:00 amSTL - NRT
1 stop18h 00mAlaska Airlines
Sat 12/136:30 pmNRT - STL
1 stop34h 57mAlaska Airlines
Deal found 12/4$778
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/74:05 pmSTL - HND
1 stop33h 35mAir Canada
Wed 3/46:50 pmHND - STL
1 stop35h 39mAir Canada
Deal found 12/3$784
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/74:05 pmSTL - NRT
2 stops33h 15mAir Canada
Wed 3/46:45 pmNRT - STL
1 stop35h 44mAir Canada
Deal found 12/3$785
This Air Canada deal was found by Cheapflights users on 12/4. 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 12/94:05 pmSTL - NRT
2 stops33h 15mAir Canada
Tue 12/166:15 pmNRT - STL
2 stops36h 14mAir Canada
Deal found 12/4$810
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:42 pmSTL - HND
2 stops30h 58mAir Canada
Thu 12/116:50 pmHND - STL
2 stops31h 11mAir Canada
Deal found 12/3$821
This Air Canada deal was found by Cheapflights users on 12/5. 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.
Sat 12/65:27 pmSTL - NRT
2 stops32h 03mAir Canada
Sat 12/136:15 pmNRT - STL
2 stops37h 48mAir Canada
Deal found 12/5$826
This Air Canada deal was found by Cheapflights users on 12/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:00 amSTL - NRT
2 stops39h 20mAir Canada
Fri 12/196:45 pmNRT - STL
1 stop35h 44mAir Canada
Deal found 12/3$828

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 December 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$627
(FlightHub)

One-way from

$340
(CheapTickets)

Popular in

June

Cheapest in

September

Average price

$1,077
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 ($246 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 5, 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 - ITM

STLITM

Lambert-St Louis

Tue 2/3

11:20 am-7:30 am

2 stops29h 10m

Osaka Itami

Thu 2/19

7:30 am-3:38 pm

2 stops23h 08m

$689

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

6:30 am-6:55 pm

2 stops21h 25m

Osaka Itami

Sat 2/28

7:05 am-10:36 am

2 stops18h 31m

$690

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 2/8

9:57 am-4:20 pm

2 stops39h 23m

Tokyo Narita

Wed 2/18

6:45 pm-3:29 pm

1 stop35h 44m

$694

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 2/3

11:20 am-4:20 pm

2 stops38h 00m

Tokyo Narita

Wed 2/18

6:15 pm-3:29 pm

2 stops36h 14m

$694

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 2/8

6:45 am-3:00 pm

1 stop17h 15m

Tokyo Narita

Thu 2/19

4:45 pm-4:44 pm

1 stop14h 59m

$698

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 2/3

8:45 am-9:10 pm

2 stops21h 25m

Tokyo Haneda

Thu 2/19

7:40 pm-10:59 pm

2 stops18h 19m

$701

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/2

2:50 pm-4:00 pm

1 stop34h 10m

Tokyo Narita

Fri 2/6

6:30 pm-10:46 pm

1 stop19h 16m

$706

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

$713

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:45 pm-4:40 pm

2 stops54h 55m

Osaka Kansai Intl

Sat 2/28

6:35 pm-12:25 pm

2 stops32h 50m

$720

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Thu 2/5

10:19 am-5:45 pm

1 stop16h 26m

Tokyo Haneda

Mon 2/16

8:00 pm-8:41 pm

1 stop15h 41m

$730

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 60 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 $586). Flying from St. Louis to Japan in June is currently the most expensive (average of $926). 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 December 5, 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 December 5, 2025.
Read through reviews of airlines operating flights from St. Louis to Japan, such as ANA, Japan Airlines, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
ANA
8.4
Very good
1,017 reviews
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
Japan Airlines
8.3
Very good
1,638 reviews
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
Delta
7.9
Good
8,010 reviews
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
United Airlines
7.4
Good
9,064 reviews
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support
Air Canada
7.1
Good
10,500 reviews
ANA
8.4
Very good
1,017 reviews

Boarding

8.6

Crew

8.7

Entertainment

7.9

Comfort

8.2

Food

7.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Mario,Nov 2025

HND - BKK

Option to use Bluetooth headphones when connecting to in flight entertainment system. I want to use my own headsets with noise cancelling support

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 ANA, Air Canada, and United Airlines fly from St. Louis to Japan in about 17h 15m. The time it takes to get you to your destination can typically vary by up to 22h 08m. St. Louis and Japan are separated by a distance of 6350 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 Southwest ($83), Southern / Mokulele ($92), and American Airlines ($240).

  • 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 $586). Flying from St. Louis to Japan in June is currently the most expensive (average of $926). 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 December 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$629Average$878FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$633Average$944FlexibilityNo cancel feeOn-time71%
Japan AirlinesCheapest$691Average$974FlexibilityNo cancel feeOn-time79%
ANACheapest$703Average$976FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$716Average$1,048FlexibilityNo cancel feeOn-time69%
DeltaCheapest$722Average$983FlexibilityNo cancel feeOn-timeN/A

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