HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kansai Intl

$651+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KIX
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Kansai Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 3, 2025.

Round-trip from

$651
(Air Canada)

Popular in

August

Cheapest in

September

Average price

$1,364
From Lambert-St Louis to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($82 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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 July 3, 2025.

This Air Canada deal was found by Cheapflights users on 7/1. 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.
Wed 9/174:05 pmSTL - KIX
1 stop34h 20mAir Canada
Wed 9/246:05 pmKIX - STL
1 stop35h 13mAir Canada
Deal found 7/1$651
This United Airlines deal was found by Cheapflights users on 7/1. 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 9/145:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Thu 9/254:50 pmKIX - STL
1 stop37h 55mUnited Airlines
Deal found 7/1$784
This Japan Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 9/277:23 amSTL - KIX
2 stops35h 02mJapan Airlines
Wed 10/16:45 amKIX - STL
2 stops27h 47mJapan Airlines
Deal found 7/2$892
This American Airlines deal was found by Cheapflights users on 7/2. 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 7/2$906
This ANA deal was found by Cheapflights users on 7/1. 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 ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/76:00 amSTL - KIX
1 stop18h 50mMultiple Airlines
Mon 9/84:50 pmKIX - STL
1 stop38h 03mMultiple Airlines
Deal found 7/1$932
This Delta deal was found by Cheapflights users on 7/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1711:02 amSTL - KIX
2 stops39h 53mDelta
Sun 8/2412:35 pmKIX - STL
2 stops26h 03mDelta
Deal found 7/3$957

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 July 3, 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

Wed 9/17

4:05 pm-4:25 pm

1 stop34h 20m

Osaka Kansai Intl

Wed 9/24

6:05 pm-3:18 pm

1 stop35h 13m

$651

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 9/14

5:49 pm-2:50 pm

1 stop31h 01m

Osaka Kansai Intl

Thu 9/25

4:50 pm-4:45 pm

1 stop37h 55m

$784

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

9:56 am-2:15 pm

2 stops38h 19m

Osaka Kansai Intl

Wed 10/1

6:45 am-8:32 pm

2 stops27h 47m

$892

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

$906

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

6:00 am-2:50 pm

1 stop18h 50m

Osaka Kansai Intl

Mon 9/8

4:50 pm-4:53 pm

1 stop38h 03m

$932

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 8/17

11:02 am-4:55 pm

2 stops39h 53m

Osaka Kansai Intl

Sun 8/24

12:35 pm-12:38 am

2 stops26h 03m

$957

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 July 3, 2025.
Peruse reviews from past customers who have flown with Japan Airlines, Delta, and United 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
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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
1,505 reviews
Japan Airlines
8.3
Very good
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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
7,982 reviews
Japan Airlines
8.3
Very good
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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
8,861 reviews
Japan Airlines
8.3
Very good
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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.
Air Canada
7.1
Good
9,681 reviews
Japan Airlines
8.3
Very good
1,505 reviews

Overall

8.3

Comfort

8.2

Food

7.7

Crew

8.7

Boarding

8.4

Entertainment

7.8

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 ($651), United Airlines ($784), and Japan Airlines ($839) 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 these airlines.

  • 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 $884). Flying from St. Louis to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,319). 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Izumisano
Nara
Nishinomiya
Himeji

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Itami flights
Kansas City to Kansai Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.