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Kansai Intl

$355+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
Jan 6 — Jan 131
Tue 1/6
Tue 1/13
1 adult, Economy
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Cheap 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 December 7, 2025.

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.
Mon 12/84:05 pmSTL - KIX
2 stops39h 15mMultiple Airlines
Sat 12/203:00 pmKIX - STL
2 stops39h 29mMultiple Airlines
Deal found 12/5$927
This American Airlines 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 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 12/5$984
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 amSTL - KIX
2 stops24h 20mANA
Fri 12/266:45 amKIX - STL
2 stops22h 41mANA
Deal found 12/5$1,221
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:37 pmSTL - KIX
2 stops33h 03mUnited Airlines
Fri 12/266:35 pmKIX - STL
1 stop18h 55mUnited Airlines
Deal found 12/5$1,235
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:45 pmSTL - KIX
2 stops32h 55mUnited Airlines
Sun 12/216:35 pmKIX - STL
2 stops18h 47mUnited Airlines
Deal found 12/5$1,241
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:30 pmSTL - KIX
3 stops30h 25mCathay Pacific
Sat 12/204:15 pmKIX - STL
3 stops39h 31mCathay Pacific
Deal found 12/5$1,501

Find 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 December 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$682
(Air Canada)

One-way from

$355
(Air Canada)

Popular in

August

Cheapest in

September

Average price

$1,847
Provider with most accurate pricing for Lambert-St Louis-Osaka Kansai Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Osaka Kansai Intl flights.
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From Lambert-St Louis to Osaka Kansai Intl
Search Deals
One-way flight from Lambert-St Louis to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($556 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 23% potential price decrease ($295 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 7, 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

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. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 1/12

7:04 am-6:50 pm

1 stop20h 46m

Osaka Kansai Intl

Mon 1/19

9:05 pm-2:50 pm

2 stops32h 45m

$832

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

2:24 pm-8:25 am

2 stops27h 01m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:48 pm

1 stop20h 58m

$836

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/1

6:45 am-4:40 pm

1 stop18h 55m

Osaka Kansai Intl

Thu 2/5

8:20 am-10:58 pm

2 stops29h 38m

$844

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

7:15 am-10:20 pm

2 stops24h 05m

Osaka Kansai Intl

Thu 2/19

5:50 pm-11:48 pm

1 stop20h 58m

$847

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 1/22

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Mon 1/26

6:35 pm-10:13 am

2 stops30h 38m

$855

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

4:05 pm-10:20 pm

2 stops39h 15m

$355

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/18

6:00 am-7:25 pm

2 stops22h 25m

$380

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/18

6:30 am-6:50 pm

1 stop21h 20m

$423

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:30 am-6:50 pm

1 stop21h 20m

$475

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Showing 1-10 of 14 results
1
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Compare providers for flights from St. Louis to Kansai Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Kansai Intl in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Osaka Kansai Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Osaka Kansai Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Osaka Kansai Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Osaka Kansai Intl Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Osaka Kansai Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Osaka Kansai Intl Airport

How much does it cost to fly round-trip from St. Louis to Osaka Kansai Intl Airport?

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 27h 01m. 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.

  • 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.

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
Nara
Izumisano
Himeji

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