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. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

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).

What is the cheapest time of day to fly from STL to KIX?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Osaka Kansai Intl Airport as you normally would.

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.

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.

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.

$356+ Flights from St. Louis to Osaka Kansai Intl Airport

Q: How much does it cost to fly round-trip from St. Louis to Osaka Kansai Intl Airport?

Airfare is below average for this route at the moment. St. Louis to Osaka Kansai Intl Airport flights typically cost between $1,828 and $1,865 in February. The cheapest round-trip price found within the last 3 days was $707 on Multiple Airlines (Feb 3-Feb 19).

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1. Tell us where you want to go

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2. Select your favorite providers

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3. Compare prices and book

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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 December 17, 2025.

Wed 12/177:00 amSTL - KIX

2 stops38h 50mMultiple Airlines

Tue 12/2311:10 pmKIX - STL

2 stops55h 19mMultiple Airlines

Deal found 12/16

$23,286

Wed 12/178:00 amSTL - KIX

2 stops23h 20mANA

Tue 12/237:05 amKIX - STL

2 stops25h 49mANA

Deal found 12/16

$25,372

Best flights from St. Louis to Kansai Intl
Discover carefully curated flight deals from St. Louis to Kansai Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 17, 2025.

Tue 2/34:05 pmSTL - KIX

2 stops39h 15mMultiple Airlines

Thu 2/193:00 pmKIX - STL

2 stops39h 29mMultiple Airlines

Deal found 12/15

$707

Sun 2/14:05 pmSTL - KIX

2 stops36h 20mAir Canada

Thu 2/53:45 pmKIX - STL

2 stops38h 44mAir Canada

Deal found 12/14

$770

Sun 2/16:45 amSTL - KIX

1 stop18h 55mUnited Airlines

Thu 2/58:20 amKIX - STL

2 stops35h 51mUnited Airlines

Deal found 12/14

$790

Sun 2/156:30 amSTL - KIX

1 stop21h 20mJapan Airlines

Sat 2/287:00 amKIX - STL

2 stops21h 56mJapan Airlines

Deal found 12/15

$824

Sat 1/174:42 pmSTL - KIX

2 stops32h 58mUnited Airlines

Wed 1/216:35 pmKIX - STL

2 stops34h 55mUnited Airlines

Deal found 12/16

$792

Tue 2/37:04 amSTL - KIX

2 stops24h 16mJapan Airlines

Thu 2/195:50 pmKIX - STL

1 stop20h 58mJapan Airlines

Deal found 12/15

$828

Tue 1/135:00 pmSTL - KIX

1 stop32h 40mUnited Airlines

Tue 1/206:35 pmKIX - STL

1 stop36h 02mUnited Airlines

Deal found 12/15

$805

Thu 1/296:00 pmSTL - KIX

2 stops31h 40mUnited Airlines

Thu 2/58:20 amKIX - STL

2 stops26h 07mUnited Airlines

Deal found 12/15

$841

Last-minute flights from St. Louis to Kansai Intl
Discover last-minute flight deals from St. Louis to Kansai Intl. Data last updated December 17, 2025 and is based on user searches.

Sun 1/49:55 amSTL - KIX

2 stops21h 25mANA

Thu 1/157:05 amKIX - STL

2 stops18h 57mANA

Deal found 12/14

$959

Sun 1/46:00 amSTL - KIX

2 stops35h 25mJapan Airlines

Thu 1/155:50 pmKIX - STL

1 stop21h 09mJapan Airlines

Deal found 12/14

$1,047

Sun 1/46:20 amSTL - KIX

3 stops41h 35mCathay Pacific

Thu 1/1510:00 amKIX - STL

2 stops28h 59mCathay Pacific

Deal found 12/14

$1,574

Tue 1/134:05 pmSTL - KIX

2 stops39h 15mMultiple Airlines

Tue 1/203:45 pmKIX - STL

2 stops38h 44mMultiple Airlines

Deal found 12/15

$740

Tue 1/136:40 pmSTL - KIX

2 stops31h 00mUnited Airlines

Tue 1/206:35 pmKIX - STL

2 stops32h 54mUnited Airlines

Deal found 12/15

$793

Tue 1/1311:05 amSTL - KIX

2 stops28h 15mCathay Pacific

Tue 1/204:15 pmKIX - STL

3 stops46h 44mCathay Pacific

Deal found 12/15

$1,232

Sat 1/174:42 pmSTL - KIX

2 stops32h 58mUnited Airlines

Wed 1/216:35 pmKIX - STL

2 stops34h 55mUnited Airlines

Deal found 12/16

$792

Thu 1/296:00 pmSTL - KIX

2 stops31h 40mUnited Airlines

Thu 2/58:20 amKIX - STL

2 stops26h 07mUnited Airlines

Deal found 12/15

$841

One-way flights from St. Louis to Kansai Intl
Search for one-way flight options from St. Louis to Kansai Intl. Find affordable one-way fares based on user searches. Data last updated December 17, 2025.

Sun 2/154:05 pmSTL - KIX

2 stops39h 15mMultiple Airlines

Deal found 12/16

$356

Wed 2/186:00 amSTL - KIX

2 stops22h 25mANA

Deal found 12/16

$380

Wed 2/186:30 amSTL - KIX

1 stop21h 20mJapan Airlines

Deal found 12/16

$423

Sat 3/74:05 pmSTL - KIX

2 stops34h 35mAir Canada

Deal found 12/16

$532

Wed 2/189:59 amSTL - KIX

3 stops37h 56mCathay Pacific

Deal found 12/16

$667

Sat 3/76:30 amSTL - KIX

1 stop21h 20mJapan Airlines

Deal found 12/16

$702

Sat 3/75:55 pmSTL - KIX

3 stops30h 00mCathay Pacific

Deal found 12/15

$810

Sat 3/75:55 pmSTL - KIX

3 stops30h 00mMultiple Airlines

Deal found 12/16

$820

Wed 12/246:41 amSTL - KIX

1 stop18h 59mUnited Airlines

Deal found 12/15

$1,554

Find flight deals from St. Louis to Kansai Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$707 (Air Canada)
One-way from	$356 (Air Canada)
Popular in	August
Cheapest in	September
Average price	$1,847

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 ($556 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 23% potential price decrease ($295 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

4:05 pm-10:20 pm

2 stops39h 15m

Osaka Kansai Intl

Thu 2/19

3:00 pm-3:29 pm

2 stops39h 29m

$707

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/1

4:05 pm-7:25 pm

2 stops36h 20m

Osaka Kansai Intl

Thu 2/5

3:45 pm-3:29 pm

2 stops38h 44m

$770

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/1

6:45 am-4:40 pm

1 stop18h 55m

Osaka Kansai Intl

Thu 2/5

8:20 am-5:11 am

2 stops35h 51m

$790

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 1/17

4:42 pm-4:40 pm

2 stops32h 58m

Osaka Kansai Intl

Wed 1/21

6:35 pm-2:30 pm

2 stops34h 55m

$792

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 1/13

5:00 pm-4:40 pm

1 stop32h 40m

Osaka Kansai Intl

Tue 1/20

6:35 pm-3:37 pm

1 stop36h 02m

$805

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:30 am-6:50 pm

1 stop21h 20m

Osaka Kansai Intl

Sat 2/28

7:00 am-1:56 pm

2 stops21h 56m

$824

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

7:04 am-10:20 pm

2 stops24h 16m

Osaka Kansai Intl

Thu 2/19

5:50 pm-11:48 pm

1 stop20h 58m

$828

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 1/29

6:00 pm-4:40 pm

2 stops31h 40m

Osaka Kansai Intl

Thu 2/5

8:20 am-7:27 pm

2 stops26h 07m

$841

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

4:05 pm-10:20 pm

2 stops39h 15m

$356

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/18

6:00 am-7:25 pm

2 stops22h 25m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 14 results

Compare providers for flights from St. Louis to Kansai Intl

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 December.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars
AranGrant	Price Accuracy2 stars	Trust 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Osaka Kansai Intl Airport

How much does it cost to fly round-trip from St. Louis to Osaka Kansai Intl Airport?

Related info for your journey

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.
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. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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

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$356+ 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.

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

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Kansai Intl

Cheapest flights from St. Louis to Kansai IntlExplore 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 December 17, 2025.

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 December 17, 2025.

Find flight deals from St. Louis to Kansai Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Osaka Kansai Intl Airport that are best for you.

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 December.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Osaka Kansai Intl Airport

How much does it cost to fly round-trip from St. Louis to Osaka Kansai Intl Airport?

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?

How long is the flight from St. Louis to Osaka Kansai Intl Airport?

Can I find deals for flights from St. Louis to Kansai Intl that include hotel bookings?

How can I find direct flights from St. Louis to Kansai Intl?

Can I find deals for business class flights from St. Louis to Kansai Intl?

Traveling to a place near Osaka Kansai Intl Airport?

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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 December 17, 2025.