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Kansai Intl

$438+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$769
(Air Canada)

One-way from

$438
(FlightHub)

Popular in

August

Cheapest in

September

Average price

$1,587
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. 4% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($84 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/12. 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 9/209:15 amSTL - KIX
1 stop17h 10mAir Canada
Sun 9/286:05 pmKIX - STL
2 stops30h 44mAir Canada
Deal found 6/12$624
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/205:47 pmSTL - KIX
1 stop31h 03mUnited Airlines
Tue 10/288:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 6/12$709
This Air Canada deal was found by Cheapflights users on 6/11. 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 12/84:15 pmSTL - KIX
2 stops39h 05mMultiple Airlines
Sat 12/203:40 pmKIX - STL
2 stops38h 46mMultiple Airlines
Deal found 6/11$756
This American Airlines deal was found by Cheapflights users on 6/12. 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 7/78:50 amSTL - KIX
1 stop19h 55mAmerican Airlines
Mon 9/85:55 pmKIX - STL
1 stop19h 04mAmerican Airlines
Deal found 6/12$953
This Japan Airlines deal was found by Cheapflights users on 6/10. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:30 pmSTL - KIX
2 stops36h 50mJapan Airlines
Sat 1/103:05 pmKIX - STL
2 stops37h 42mJapan Airlines
Deal found 6/10$1,189
This FlightHub deal was found by Cheapflights users on 6/12. 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 6/136:30 amSTL - KIX
2 stops23h 00mANA
Mon 6/2311:00 amKIX - STL
2 stops22h 37mANA
Deal found 6/12$1,298
This oojo deal was found by Cheapflights users on 6/11. 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.
Sat 9/206:20 amSTL - KIX
2 stops34h 20mCathay Pacific
Sun 9/284:20 pmKIX - STL
3 stops44h 30mCathay Pacific
Deal found 6/11$1,496

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 June 12, 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

Mon 7/7

5:00 am-4:25 pm

2 stops21h 25m

Osaka Kansai Intl

Mon 9/8

6:05 pm-7:57 pm

2 stops39h 52m

$769

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

8:50 am-6:45 pm

1 stop19h 55m

Osaka Kansai Intl

Mon 9/8

5:55 pm-10:59 pm

1 stop19h 04m

$953

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 7/29

4:45 pm-2:50 pm

2 stops32h 05m

Osaka Kansai Intl

Fri 8/8

4:55 pm-12:46 pm

2 stops33h 51m

$1,061

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 6/27

7:20 am-8:20 am

2 stops35h 00m

Osaka Kansai Intl

Sat 7/19

6:20 pm-11:59 pm

2 stops43h 39m

$1,235

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

8:01 pm-6:40 am

2 stops44h 39m

Osaka Kansai Intl

Mon 9/8

4:20 pm-8:34 pm

3 stops42h 14m

$1,779

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 8/23

5:30 pm-4:25 pm

2 stops56h 55m

$438

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 6/19

8:35 am-2:15 pm

2 stops39h 40m

$454

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 8/23

5:49 pm-2:50 pm

1 stop31h 01m

$456

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 6/20

11:17 am-9:00 pm

2 stops19h 43m

$505

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 6/15

6:10 am-2:50 pm

1 stop18h 40m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 12 results
1
2

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

Rainfall in Kansai Intl by month

Plan your trip to Kansai Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Osaka Kansai Intl Airport ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka Kansai Intl Airport when rainfall is around 1.6 in.

Temperature in Kansai Intl by month

Plan your trip to Kansai Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Osaka Kansai Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

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 June 12, 2025.
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Japan Airlines
8.3
Very good
1,490 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Delta
8.0
Very good
7,946 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Cathay Pacific
7.6
Good
892 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
United Airlines
7.4
Good
8,790 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
American Airlines
7.2
Good
10,000 reviews
Japan Airlines
8.3
Very good
1,490 reviews

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.

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.

  • What are the cheapest airlines flying from St. Louis to Osaka Kansai Intl Airport round-trip?

    According to our current data, Air Canada ($769), American Airlines ($953), and United Airlines ($1,061) 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 42% less than the average price by searching for these airlines.

  • 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 $438 on Air Canada. Other airlines that offer cheap prices include Japan Airlines from $454 and Delta from $505 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 $888). Flying from St. Louis to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,324). 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.

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