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$315+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — FUK
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
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 January 20, 2026.

This SmartFares deal was found by Cheapflights users on 1/18. 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.
Mon 3/97:00 am
STL
-
NRT
1 stop19h 00m
Multiple Airlines
Wed 3/186:30 pm
NRT
-
STL
1 stop19h 29m
Multiple Airlines
Deal found 1/18$653
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/227:00 am
STL
-
NRT
1 stop18h 00m
Multiple Airlines
Thu 2/266:30 pm
NRT
-
STL
1 stop20h 29m
Multiple Airlines
Deal found 1/19$670
This Alaska Airlines deal was found by Cheapflights users on 1/18. 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.
Mon 2/92:50 pm
STL
-
NRT
1 stop34h 10m
Multiple Airlines
Fri 2/276:30 pm
NRT
-
STL
1 stop20h 29m
Multiple Airlines
Deal found 1/18$678
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/227:00 am
STL
-
NRT
1 stop18h 00m
Multiple Airlines
Sat 2/286:30 pm
NRT
-
STL
1 stop34h 53m
Multiple Airlines
Deal found 1/19$684
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:47 pm
STL
-
NRT
1 stop34h 13m
Multiple Airlines
Tue 3/106:30 pm
NRT
-
STL
1 stop33h 21m
Multiple Airlines
Deal found 1/20$686
This Gurufare deal was found by Cheapflights users on 1/18. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:47 pm
STL
-
NRT
1 stop34h 13m
Multiple Airlines
Thu 3/56:30 pm
NRT
-
STL
1 stop20h 29m
Multiple Airlines
Deal found 1/18$688
This Kiwi.com deal was found by Cheapflights users on 1/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:00 am
STL
-
NRT
1 stop19h 00m
Multiple Airlines
Wed 5/66:00 pm
NRT
-
STL
1 stop19h 59m
Multiple Airlines
Deal found 1/18$689
This Alaska Airlines deal was found by Cheapflights users on 1/17. 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.
Tue 3/107:00 am
STL
-
NRT
1 stop19h 00m
Multiple Airlines
Mon 3/166:30 pm
NRT
-
STL
1 stop19h 29m
Multiple Airlines
Deal found 1/17$693
This Alaska Airlines deal was found by Cheapflights users on 1/18. 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.
Tue 4/213:50 pm
STL
-
NRT
1 stop34h 10m
Multiple Airlines
Wed 5/66:00 pm
NRT
-
STL
1 stop19h 59m
Multiple Airlines
Deal found 1/18$699
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/202:47 pm
STL
-
NRT
1 stop34h 13m
Multiple Airlines
Fri 3/66:30 pm
NRT
-
STL
1 stop20h 29m
Multiple Airlines
Deal found 1/19$701
This Alaska Airlines deal was found by Cheapflights users on 1/18. 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 1/222:50 pm
STL
-
NRT
1 stop34h 10m
Multiple Airlines
Sat 1/246:30 pm
NRT
-
STL
1 stop34h 24m
Multiple Airlines
Deal found 1/18$707
This Air Canada deal was found by Cheapflights users on 1/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:05 pm
STL
-
HND
1 stop33h 35m
Air Canada
Thu 2/266:50 pm
HND
-
STL
2 stops19h 09m
Air Canada
Deal found 1/19$708

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 January 20, 2026.

Most accurate provider

business-class.com
3 stars

Most trusted provider

business-class.com
3 stars

Round-trip from

$653
(SmartFares)

One-way from

$315
(Alaska Airlines)

Popular in

June

Cheapest in

September

Average price

$793
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 ($241 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 20, 2026.
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

Mon 2/23

7:00 am-4:00 pm

1 stop18h 00m

Tokyo Narita

Thu 3/5

6:30 pm-11:59 pm

1 stop20h 29m

$670

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 2/22

7:00 am-4:00 pm

1 stop18h 00m

Tokyo Narita

Thu 2/26

6:30 pm-11:59 pm

1 stop20h 29m

$670

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 2/28

2:47 pm-4:00 pm

1 stop34h 13m

Tokyo Narita

Tue 3/10

6:30 pm-1:51 pm

1 stop33h 21m

$686

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sun 2/22

7:00 am-4:00 pm

1 stop18h 00m

Tokyo Narita

Sat 2/28

6:30 pm-2:23 pm

1 stop34h 53m

$702

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Fri 2/20

7:00 am-4:00 pm

1 stop18h 00m

Tokyo Narita

Wed 3/4

6:30 pm-1:51 pm

1 stop34h 21m

$702

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 1/24

6:19 pm-4:00 pm

1 stop30h 41m

Tokyo Narita

Mon 1/26

6:30 pm-1:54 pm

1 stop34h 24m

$702

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Fri 2/6

2:50 pm-4:00 pm

1 stop34h 10m

Tokyo Narita

Thu 2/19

6:30 pm-1:51 pm

1 stop34h 21m

$710

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 3/3

8:30 am-4:50 pm

1 stop17h 20m

Tokyo Haneda

Tue 3/10

6:25 pm-11:51 pm

1 stop19h 26m

$738

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 4/14

7:00 am-4:00 pm

1 stop19h 00m

Tokyo Narita

Wed 4/22

4:55 pm-10:56 pm

2 stops20h 01m

$741

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Wed 2/18

7:41 am-9:10 pm

2 stops22h 29m

Tokyo Haneda

Wed 2/25

7:40 pm-10:59 pm

2 stops18h 19m

$743

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 54 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 $580). Flying from St. Louis to Japan in June is currently the most expensive (average of $922). 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.

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 January 20, 2026.
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
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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
1,687 reviews
Japan Airlines
8.3
Very good
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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
7.9
Good
8,080 reviews
Japan Airlines
8.3
Very good
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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
9,183 reviews
Japan Airlines
8.3
Very good
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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.
American Airlines
7.2
Good
11,162 reviews
Japan Airlines
8.3
Very good
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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
10,637 reviews
Japan Airlines
8.3
Very good
1,687 reviews

Comfort

8.2

Entertainment

7.8

Overall

8.3

Food

7.7

Crew

8.7

Boarding

8.4

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, Delta, and ANA fly from St. Louis to Japan in about 17h 20m. The time it takes to get you to your destination can typically vary by up to 21h 20m. 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 Delta ($360), Japan Airlines ($369), and American Airlines ($372).

  • 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, September is the cheapest month in which you can book a flight from St. Louis to Japan (average of $580). Flying from St. Louis to Japan in June is currently the most expensive (average of $922). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$593Average$961FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$629Average$867FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$691Average$1,004FlexibilityNo cancel feeOn-time79%
ANACheapest$703Average$1,082FlexibilityNo cancel feeOn-time80%
DeltaCheapest$711Average$974FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$716Average$1,075FlexibilityNo cancel feeOn-time69%

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