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Kansai Intl

$433+ Cheap flights from St. Louis (STL) to Kansai Intl (KIX)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from St. Louis to Kansai Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Kansai Intl (KIX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$728
(Booking.com)

One-way from

$433
(FlightHub)

Popular in

August

Cheapest in

September

Average price

$751
From Lambert-St Louis to Osaka Kansai Intl
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One-way flight from Lambert-St Louis to Osaka Kansai Intl
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Highest demand for flights based on searches. 25% potential increase in price ($545 potential increase over avg. RT price).
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Cheapest flight prices on average. 23% potential price decrease ($294 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Kansai Intl

Cheapest flights from St. Louis to Kansai Intl
Explore the most affordable flight options available from St. Louis to Kansai Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Expedia deal was found by Cheapflights users on 9/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:30 pmSTL - KIX
2 stops55h 20mUnited Airlines
Tue 9/304:50 pmKIX - STL
2 stops31h 02mUnited Airlines
Deal found 9/14$727
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/155:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Tue 9/234:50 pmKIX - STL
2 stops17h 56mUnited Airlines
Deal found 9/15$729
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/145:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Tue 9/234:50 pmKIX - STL
1 stop38h 03mUnited Airlines
Deal found 9/14$732
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/157:04 pmSTL - KIX
2 stops29h 46mUnited Airlines
Thu 9/258:25 amKIX - STL
3 stops27h 35mUnited Airlines
Deal found 9/15$733
This United Airlines deal was found by Cheapflights users on 9/13. 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 9/165:30 pmSTL - KIX
2 stops31h 20mUnited Airlines
Fri 9/194:50 pmKIX - STL
2 stops33h 53mUnited Airlines
Deal found 9/13$741
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Mon 12/83:22 pmSTL - KIX
2 stops26h 03mJapan Airlines
Sat 12/207:00 amKIX - STL
2 stops24h 41mJapan Airlines
Deal found 9/14$748
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 9/187:04 pmSTL - KIX
2 stops29h 46mUnited Airlines
Thu 9/254:50 pmKIX - STL
2 stops19h 10mUnited Airlines
Deal found 9/15$757
This United Airlines deal was found by Cheapflights users on 9/13. 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 9/145:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Sun 9/218:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 9/13$759
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/165:15 amSTL - KIX
2 stops19h 35mUnited Airlines
Sun 9/218:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 9/15$760
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 12/86:55 amSTL - KIX
1 stop20h 55mAmerican Airlines
Sat 12/205:50 pmKIX - STL
1 stop21h 01mAmerican Airlines
Deal found 9/14$767
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 9/208:20 amSTL - KIX
2 stops40h 30mUnited Airlines
Sun 9/284:50 pmKIX - STL
2 stops19h 10mUnited Airlines
Deal found 9/16$769

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Kansai Intl 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 September 16, 2025.
Use the filters below to find and compare flights from St. Louis to Osaka Kansai Intl Airport that are best for you.

Fly from

St. Louis

Fly to

Kansai Intl

Route

Depart

Return

Price

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 9/19

5:30 pm-2:50 pm

2 stops55h 20m

Osaka Kansai Intl

Tue 9/30

4:50 pm-4:54 pm

1 stop38h 04m

$727

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

5:28 pm-2:50 pm

2 stops31h 22m

Osaka Kansai Intl

Wed 10/1

4:50 pm-10:00 pm

2 stops19h 10m

$741

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

6:55 am-6:50 pm

1 stop20h 55m

Osaka Kansai Intl

Sat 12/20

5:50 pm-11:51 pm

1 stop21h 01m

$767

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

4:32 pm-2:50 pm

2 stops32h 18m

Osaka Kansai Intl

Sun 9/28

4:50 pm-10:00 pm

2 stops19h 10m

$769

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

6:55 am-6:50 pm

1 stop20h 55m

$433

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

1:00 pm-1:25 pm

2 stops33h 25m

$450

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

3:19 pm-7:25 pm

3 stops37h 06m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from St. Louis to Kansai Intl

Have a flexible travel schedule? Discover the best time to fly to Kansai Intl 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Kansai Intl. 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 Osaka Kansai Intl?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Osaka Kansai Intl. On average, Lambert-St Louis has 0 outbound flights to Osaka Kansai Intl per day from 0 airlines. 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 Osaka Kansai Intl Airport?

    Departing from St. Louis to Osaka Kansai Intl Airport will take you 20h 55m. The distance between St. Louis and Osaka Kansai Intl Airport is about 6595 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from St. Louis to Osaka Kansai Intl Airport one-way?

    One-way options have recently been found by users for as low as $433 on Japan Airlines. Other airlines that offer cheap prices include ANA from $450 and United Airlines from $632 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Kansai Intl 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 Osaka Kansai Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Osaka Kansai Intl Airport (average of $859). Flying from St. Louis to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,309). 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

Traveling to a place near Osaka Kansai Intl Airport?

Book flights to Osaka Kansai Intl Airport if you plan to visit one of these locations
Izumisano
Nara
Nishinomiya
Himeji

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