$581 Cheap Flights from Osaka (KIX) to St. Louis (STL)

View $581 flight on Mon, Aug 25, 2025Opens in a new window

Popular airlines from Kansai Intl. Airport (KIX) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Osaka to St. Louis (KIX-STL)

Prices were available within the past 7 days and start at $581 for one-way flights and $1,035 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 21 - Mon, Sep 1
KIX
Osaka
STL
St. Louis
$1,035 Roundtrip, found 18 hours ago
$1,035
Roundtrip
found 18 hours ago
Select Delta flight, departing Thu, Aug 21 from Osaka to St. Louis, returning Mon, Sep 1, priced at $1,035 found 18 hours ago
Delta
Sat, Aug 30 - Tue, Sep 16
KIX
Osaka
STL
St. Louis
$1,058 Roundtrip, found 18 hours ago
$1,058
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, Aug 30 from Osaka to St. Louis, returning Tue, Sep 16, priced at $1,058 found 18 hours ago
Japan Airlines
Wed, Aug 20 - Thu, Sep 4
KIX
Osaka
STL
St. Louis
$1,066 Roundtrip, found 8 hours ago
$1,066
Roundtrip
found 8 hours ago
Select Japan Airlines flight, departing Wed, Aug 20 from Osaka to St. Louis, returning Thu, Sep 4, priced at $1,066 found 8 hours ago
Asiana Airlines
Wed, Aug 20 - Thu, Sep 4
KIX
Osaka
STL
St. Louis
$1,071 Roundtrip, found 8 hours ago
$1,071
Roundtrip
found 8 hours ago
Select Asiana Airlines flight, departing Wed, Aug 20 from Osaka to St. Louis, returning Thu, Sep 4, priced at $1,071 found 8 hours ago
Delta
Sat, Aug 30 - Fri, Sep 19
KIX
Osaka
STL
St. Louis
$1,080 Roundtrip, found 18 hours ago
$1,080
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, Aug 30 from Osaka to St. Louis, returning Fri, Sep 19, priced at $1,080 found 18 hours ago
Delta
Sat, Sep 27 - Sat, Oct 4
KIX
Osaka
STL
St. Louis
$1,097 Roundtrip, found 12 hours ago
$1,097
Roundtrip
found 12 hours ago
Select Delta flight, departing Sat, Sep 27 from Osaka to St. Louis, returning Sat, Oct 4, priced at $1,097 found 12 hours ago
Japan Airlines
Sat, Sep 27 - Sat, Oct 4
KIX
Osaka
STL
St. Louis
$1,118 Roundtrip, found 12 hours ago
$1,118
Roundtrip
found 12 hours ago
Select Japan Airlines flight, departing Sat, Sep 27 from Osaka to St. Louis, returning Sat, Oct 4, priced at $1,118 found 12 hours ago
Delta
Sun, Aug 31 - Tue, Sep 16
KIX
Osaka
STL
St. Louis
$1,130 Roundtrip, found 18 hours ago
$1,130
Roundtrip
found 18 hours ago
Select Delta flight, departing Sun, Aug 31 from Osaka to St. Louis, returning Tue, Sep 16, priced at $1,130 found 18 hours ago
China Airlines
Thu, Apr 23 - Sat, May 9
KIX
Osaka
STL
St. Louis
$1,148 Roundtrip, found 7 hours ago
$1,148
Roundtrip
found 7 hours ago
Select China Airlines flight, departing Thu, Apr 23 from Osaka to St. Louis, returning Sat, May 9, priced at $1,148 found 7 hours ago
Air Canada
Thu, Sep 4 - Tue, Sep 16
KIX
Osaka
STL
St. Louis
$1,166 Roundtrip, found 18 hours ago
$1,166
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Thu, Sep 4 from Osaka to St. Louis, returning Tue, Sep 16, priced at $1,166 found 18 hours ago
Flights from Osaka (KIX) to St. Louis (STL)
Origin airport
Kansai Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, Delta, Hawaiian Airlines, Japan Airlines, Korean Air, Qatar Airways, United
Roundtrip price
$1,034
Distance
6599 mi

Osaka to St. Louis Flights

The cheapest times to fly from Osaka to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Osaka to St. Louis are during the month of August. You can find some of the cheapest flights from Osaka to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Osaka to St. Louis

Sunday is one of the best days to book for cheap flights from Osaka to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Osaka to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Osaka to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $581 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Osaka to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Osaka to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from KIX to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from KIX to STL?
The cheapest flights from KIX to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from KIX to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from KIX to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights available from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from KIX to STL?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until just before your trip to book a ticket from KIX to STL often results in higher prices. While you might find some last-minute discounts, there's no guarantee. Keep your travel schedule open to boost your chances of landing a bargain.
Is it cheaper to book a KIX to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a KIX to STL flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place will take the stress out of planning your trip. Simply secure your flights and choose from our extensive range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Kansai Intl. Airport (KIX) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your KIX to STL flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.