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Kansai Intl

$380+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
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 November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$703
(United Airlines)

One-way from

$380
(FlightHub)

Popular in

August

Cheapest in

September
Provider with most accurate pricing for Lambert-St Louis-Osaka Kansai Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Osaka Kansai Intl flights.
Search Deals
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 ($567 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 23% potential price decrease ($296 potential savings vs. average RT price).
Search Deals

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 November 20, 2025.

This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/84:45 pmSTL - KIX
2 stops32h 55mUnited Airlines
Sat 12/206:35 pmKIX - STL
2 stops30h 14mUnited Airlines
Deal found 11/18$833
This Air Canada deal was found by Cheapflights users on 11/20. 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 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 11/20$854
This FlightHub deal was found by Cheapflights users on 11/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:55 amSTL - KIX
1 stop20h 55mJapan Airlines
Sat 12/207:00 amKIX - STL
2 stops24h 46mJapan Airlines
Deal found 11/19$876
This oojo deal was found by Cheapflights users on 11/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:39 amSTL - KIX
2 stops37h 06mCathay Pacific
Thu 11/277:05 pmKIX - STL
2 stops38h 45mCathay Pacific
Deal found 11/19$1,265
This Gurufare deal was found by Cheapflights users on 11/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:30 pmSTL - KIX
2 stops28h 15mCathay Pacific
Sat 12/204:15 pmKIX - STL
3 stops45h 41mCathay Pacific
Deal found 11/19$1,501

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 November 20, 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 2/1

6:45 am-4:40 pm

1 stop18h 55m

Osaka Kansai Intl

Wed 2/18

8:20 am-9:00 pm

2 stops27h 40m

$703

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 2/16

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Fri 2/27

6:35 pm-1:14 pm

2 stops33h 39m

$706

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 1/22

4:35 pm-4:40 pm

2 stops33h 05m

Osaka Kansai Intl

Mon 2/2

6:35 pm-9:22 am

2 stops29h 47m

$708

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 2/5

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Wed 2/18

8:20 am-10:59 pm

2 stops29h 39m

$709

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/4

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Thu 2/19

8:20 am-10:00 pm

2 stops28h 40m

$709

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/18

4:39 pm-4:40 pm

2 stops33h 01m

Osaka Kansai Intl

Mon 3/2

8:20 am-8:23 pm

2 stops27h 03m

$710

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

7:41 am-7:25 pm

2 stops44h 44m

Osaka Kansai Intl

Thu 2/26

8:20 am-9:00 pm

2 stops27h 40m

$710

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 2/2

5:00 pm-4:40 pm

1 stop32h 40m

Osaka Kansai Intl

Tue 2/17

8:20 am-10:00 pm

2 stops28h 40m

$711

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 1/31

5:00 pm-4:40 pm

1 stop32h 40m

Osaka Kansai Intl

Thu 2/19

8:20 am-9:00 pm

2 stops27h 40m

$711

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/18

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Tue 3/3

6:35 pm-4:44 pm

1 stop37h 09m

$715

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 18 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 November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 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.

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 November 20, 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
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

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
1,623 reviews
Japan Airlines
8.3
Very good
1,623 reviews

Crew

8.7

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

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 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 18h 55m. The distance between St. Louis and Osaka Kansai Intl Airport is about 6595 mi.

  • 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.

  • 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

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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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$723Average$813FlexibilityNo cancel feeOn-time79%

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