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Kansai Intl

$853+ Cheap flights from St. Louis (STL) to Kansai Intl (KIX)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
apr 14 — apr 211
tis 4/14
tis 4/21
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 mars 15, 2026.

This Air Canada deal was found by Cheapflights users on 3/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 9/1512:10 pm
STL
-
KIX
2 stops38h 15m
Air Canada
tis 9/226:00 pm
KIX
-
STL
2 stops38h 41m
Air Canada
Deal found 3/10$853
This Air Canada deal was found by Cheapflights users on 3/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sön 9/272:40 pm
STL
-
KIX
2 stops35h 45m
Air Canada
tors 10/16:00 pm
KIX
-
STL
2 stops38h 41m
Air Canada
Deal found 3/10$943
This Air Canada deal was found by Cheapflights users on 3/12. 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.
tors 10/12:40 pm
STL
-
KIX
2 stops35h 45m
Air Canada
tis 10/206:00 pm
KIX
-
STL
2 stops38h 41m
Air Canada
Deal found 3/12$949
This Air Canada deal was found by Cheapflights users on 3/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mån 10/122:40 pm
STL
-
KIX
1 stop35h 45m
Air Canada
tors 10/226:00 pm
KIX
-
STL
2 stops34h 00m
Air Canada
Deal found 3/13$956

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 mars 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,053
(Gotogate)

Popular in

May

Cheapest in

February

Average price

$1,387
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.
Search Deals
From Lambert-St Louis to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($327 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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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 mars 15, 2026.
Use the filters below to find and compare flights from St. Louis to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

sön 4/19

8:54 am-10:00 pm

2 stops23h 06m

Osaka Kansai Intl

lör 5/2

2:50 pm-2:03 pm

2 stops37h 13m

$1,189

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

mån 4/27

6:21 am-6:45 pm

1 stop22h 24m

Osaka Kansai Intl

mån 5/4

9:15 pm-2:03 pm

2 stops30h 48m

$1,262

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

fre 4/24

6:21 am-6:45 pm

1 stop22h 24m

Osaka Kansai Intl

fre 5/1

5:45 pm-11:57 pm

1 stop20h 12m

$1,350
Quickest round-trip

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

mån 4/27

6:21 am-6:45 pm

1 stop22h 24m

Osaka Kansai Intl

mån 5/4

5:45 pm-11:57 pm

1 stop20h 12m

$1,364

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

fre 4/24

8:30 am-7:50 pm

2 stops21h 20m

Osaka Kansai Intl

fre 5/1

9:20 am-9:13 pm

2 stops25h 53m

$1,372

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

sön 4/26

6:21 am-6:45 pm

1 stop22h 24m

Osaka Kansai Intl

sön 5/3

5:45 pm-11:57 pm

1 stop20h 12m

$1,458

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

sön 4/26

6:21 am-2:50 pm

3 stops42h 29m

Osaka Kansai Intl

sön 5/3

7:25 pm-10:59 pm

2 stops41h 34m

$1,524

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/10

Sorted by cheapest first

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 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 mars 15, 2026.
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
1,734 reviews

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Crew

8.7

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
1,734 reviews
Japan Airlines
8.3
Very good
1,734 reviews

Comfort

8.2

Food

7.7

Overall

8.3

Entertainment

7.8

Crew

8.7

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 23h 06m. 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 ($751), offers the cheapest pricing from St. Louis to Osaka Kansai Intl Airport.

  • 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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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 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 mars 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest$751Average$1,060FlexibilityNo cancel feeOn-time79%

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