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Kansai Intl

$381+ 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
nov. 22 — nov. 291
sáb. 11/22
sáb. 11/29
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 octubre 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$727
(Gurufare)

One-way from

$381
(FlightHub)

Popular in

August

Cheapest in

September

Average price

$1,192
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
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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. 27% potential increase in price ($582 potential increase over avg. RT price).
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Cheapest flight prices on average. 24% potential price decrease ($298 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octubre 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/45:30 pmSTL - KIX
1 stop32h 10mUnited Airlines
mié. 12/176:35 pmKIX - STL
1 stop18h 54mUnited Airlines
Deal found 10/20$845
This American Airlines deal was found by Cheapflights users on 10/21. 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.
vie. 12/56:55 amSTL - KIX
1 stop20h 55mAmerican Airlines
vie. 12/125:50 pmKIX - STL
1 stop21h 07mAmerican Airlines
Deal found 10/21$897
This United Airlines deal was found by Cheapflights users on 10/21. 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.
vie. 12/55:27 pmSTL - KIX
2 stops56h 13mUnited Airlines
vie. 12/126:35 pmKIX - STL
3 stops36h 05mUnited Airlines
Deal found 10/21$917
This United Airlines deal was found by Cheapflights users on 10/22. 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.
sáb. 12/68:30 amSTL - KIX
2 stops41h 10mUnited Airlines
sáb. 12/136:35 pmKIX - STL
3 stops36h 05mUnited Airlines
Deal found 10/22$928
This FlightHub deal was found by Cheapflights users on 10/23. 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. 12/88:00 amSTL - KIX
2 stops23h 20mANA
sáb. 12/202:05 pmKIX - STL
2 stops20h 13mANA
Deal found 10/23$949
This United Airlines deal was found by Cheapflights users on 10/22. 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.
dom. 11/24:35 pmSTL - KIX
2 stops33h 05mUnited Airlines
jue. 11/66:35 pmKIX - STL
2 stops18h 47mUnited Airlines
Deal found 10/22$952
This American Airlines deal was found by Cheapflights users on 10/22. 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.
lun. 12/86:55 amSTL - KIX
1 stop20h 55mAmerican Airlines
sáb. 12/205:50 pmKIX - STL
1 stop21h 01mAmerican Airlines
Deal found 10/22$958
This Gurufare deal was found by Cheapflights users on 10/22. 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.
lun. 12/83:22 pmSTL - KIX
2 stops26h 03mJapan Airlines
sáb. 12/209:05 pmKIX - STL
2 stops34h 41mJapan Airlines
Deal found 10/22$959

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 octubre 23, 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

mar. 2/3

11:20 am-8:35 am

2 stops30h 15m

Osaka Kansai Intl

jue. 2/19

2:05 pm-7:19 pm

2 stops20h 14m

$727

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

jue. 2/12

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

sáb. 2/28

7:00 am-11:10 am

2 stops19h 10m

$831

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

jue. 12/4

5:30 pm-4:40 pm

1 stop32h 10m

Osaka Kansai Intl

mié. 12/17

6:35 pm-8:57 pm

2 stops17h 22m

$845

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

dom. 2/15

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

sáb. 2/28

5:50 pm-11:08 pm

1 stop20h 18m

$851

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

dom. 12/7

6:55 am-6:50 pm

1 stop20h 55m

Osaka Kansai Intl

dom. 12/14

5:50 pm-11:57 pm

1 stop21h 07m

$897

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

vie. 12/5

6:55 am-6:50 pm

1 stop20h 55m

Osaka Kansai Intl

vie. 12/12

5:50 pm-11:06 pm

2 stops20h 16m

$901

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

sáb. 12/6

8:30 am-4:40 pm

2 stops41h 10m

Osaka Kansai Intl

sáb. 12/13

6:35 pm-3:40 pm

3 stops36h 05m

$928

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

dom. 2/15

7:41 am-8:35 am

2 stops33h 54m

$381

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

mié. 2/18

5:25 pm-4:40 pm

1 stop32h 15m

$399

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

dom. 2/15

6:10 am-6:50 pm

1 stop21h 40m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 16 results
1
2

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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Osaka Kansai Intl Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

Reviews of airlines servicing Kansai Intl

Get insights into the airlines that provide service to Kansai Intl. 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 Kansai Intl. Reviews last updated octubre 23, 2025.
Peruse reviews from past customers who have flown with Japan Airlines from St. Louis to Osaka Kansai Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,583 reviews

Comfort

8.2

Entertainment

7.8

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.
Japan Airlines
8.3
Very good
1,583 reviews
Japan Airlines
8.3
Very good
1,583 reviews

Comfort

8.2

Entertainment

7.8

Crew

8.7

Boarding

8.4

Food

7.7

Overall

8.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

HNL - KIX

Local boy flight attendant was amazing. Super friendly and attentive.

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 1 airline. 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 21h 40m. 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 is the cheapest airline to fly from St. Louis to Osaka Kansai Intl Airport round-trip?

    According to our current data, Japan Airlines ($723), offers the cheapest pricing from St. Louis to Osaka Kansai Intl Airport. You may be able to fly from St. Louis to Osaka Kansai Intl Airport for 52% less than the average price by searching for this airline.

  • 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 $381 on ANA. Other airlines that offer cheap prices include United Airlines from $399 and American Airlines from $437 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.

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
Nishinomiya
Himeji

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Kansai Intl

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Osaka Itami flights
Kansas City to Kansai Intl flights

Top airline flying from St. Louis to Kansai Intl

Discover the top airline that operate flights from St. Louis to Kansai Intl. 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 octubre 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$723Average$813FlexibilityNo cancel feeOn-time79%

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