STL - KIX

$470 Find Cheap Flights from St. Louis to Osaka

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Kansai Intl departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Osaka Kansai Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Osaka, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Osaka, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$849
Air Canada
Thu 4/23Mon 4/27
STL - KIX • 2 stops
Cheapest one-way
$470
Multiple Airlines
Mon 4/6
STL - KIX • 2 stops
Top airlines
Air Canada
Cheapest • from $849 (round-trip)
Japan Airlines
Best reviews • 8.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Kansai Intl. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Los Angeles (LAX)
Cheapest • Avg $1,745 (round-trip)
San Francisco (SFO)
Shortest trip • 17h 35m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Kansai Intl!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Kansai Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Kansai Intl

Thu, Apr 23 - Mon, Apr 27
Air Canada Logo
4:05 pm - 4:25 pm
STL
-
KIX
34h 20m
2 stops
Air Canada Logo
6:00 pm - 3:24 pm
KIX
-
STL
35h 24m
2 stops
$849Air Canada
Thu, Jun 18 - Fri, Jun 26
Air Canada Logo
7:25 am - 4:25 pm
STL
-
KIX
19h 00m
1 stop
Air Canada Logo
6:00 pm - 12:21 pm
KIX
-
STL
32h 21m
1 stop
$927Air Canada
Mon, Apr 13 - Tue, Apr 21
Multiple Airlines Logo
4:05 pm - 9:00 pm
STL
-
KIX
38h 55m
2 stops
Multiple Airlines Logo
6:00 pm - 3:24 pm
KIX
-
STL
35h 24m
2 stops
$961Multiple Airlines
Thu, Jun 18 - Fri, Jun 26
Air Canada Logo
7:25 am - 4:25 pm
STL
-
KIX
19h 00m
1 stop
Air Canada Logo
6:00 pm - 8:05 pm
KIX
-
STL
40h 05m
2 stops
$976Air Canada
Tue, May 26 - Mon, Jun 1
Air Canada Logo
2:20 pm - 4:25 pm
STL
-
KIX
36h 05m
2 stops
Air Canada Logo
6:00 pm - 12:06 pm
KIX
-
STL
32h 06m
2 stops
$982Air Canada
Tue, Jun 2 - Fri, Jun 19
Asiana Airlines Logo
7:30 am - 4:25 pm
STL
-
KIX
18h 55m
1 stop
Asiana Airlines Logo
6:00 pm - 12:21 pm
KIX
-
STL
32h 21m
1 stop
$997Asiana Airlines
Wed, Jun 3 - Mon, Jun 22
Air Canada Logo
2:20 pm - 4:25 pm
STL
-
KIX
36h 05m
1 stop
Air Canada Logo
6:00 pm - 8:05 pm
KIX
-
STL
40h 05m
2 stops
$1,004Air Canada
Wed, Jun 3 - Mon, Jun 22
Air Canada Logo
1:00 pm - 4:25 pm
STL
-
KIX
37h 25m
2 stops
Air Canada Logo
6:00 pm - 8:05 pm
KIX
-
STL
40h 05m
2 stops
$1,008Air Canada
Wed, Jun 3 - Fri, Jun 19
Air Canada Logo
2:20 pm - 4:25 pm
STL
-
KIX
36h 05m
1 stop
Air Canada Logo
6:00 pm - 3:46 pm
KIX
-
STL
35h 46m
2 stops
$1,037Air Canada
Wed, Jun 3 - Fri, Jun 19
Air Canada Logo
1:00 pm - 4:25 pm
STL
-
KIX
37h 25m
2 stops
Air Canada Logo
6:00 pm - 3:46 pm
KIX
-
STL
35h 46m
2 stops
$1,040Air Canada
Booking Insights

KAYAK's insights & trends for St. Louis to Kansai Intl flights

Get data-powered insights and trends into flights from St. Louis to Kansai Intl to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Osaka?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Osaka were found on Air Canada ($849) and Asiana Airlines ($997).

Find deals

Good to know

Cheapest flight$470
Flight from St. Louis to Osaka

When to book flights from St. Louis to Kansai Intl

Are your dates flexible? Find out the best times to travel from St. Louis to Kansai Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Osaka flights

  • What is the cheapest flight from St. Louis to Osaka Kansai Intl Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Osaka Kansai Intl Airport was $470 for a one-way ticket and $849 for a round-trip.

  • Do I need a passport to fly between St. Louis and Osaka?

    Yes, you’ll need a passport to travel to Osaka from St. Louis.

  • Which airports will I be using when flying from St. Louis to Osaka?

    On your way to Osaka, you’ll fly out from Lambert-St Louis. You’ll be landing at Osaka Kansai Intl.

  • Which aircraft models fly most regularly from St. Louis to Osaka?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Osaka?

    oneworld is the only airline alliance operating flights between St. Louis and Osaka.

  • How does KAYAK find such low prices on flights from St. Louis to Osaka?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Osaka.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Osaka?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Osaka from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Osaka?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Osaka with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and KIX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Osaka?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Osaka from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Kansai Intl

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Osaka. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Kansai Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.3
Japan AirlinesOverall score based on 1714 reviews
8.2Comfort
8.4Boarding
8.7Crew
7.7Food
7.8Entertainment
Airline reviews

Not as good as I expected, I couldn't use the screen to watch movies or anything else because it wasn't 'STEADY' AT ALL, it moved every single time that the passenger who sat on that seat moved, that caused me fell dizzy and nauseous when I tried to use it, so I ended up with only sleeping and eating with no entertainment all my haul flight on premium economy seat, plus the passenger who sat next to me, she just loved to spread her very long hair down on my shoulder, face, arm, sometimes her hair just whacked my face till I really wanted to offer her my hairband!, super annoying 😑 and that my bad experience with that flight.

4.0 OkayAnonymous, Feb 2026
DFW - HND
Read more Japan Airlines reviews

Not as good as I expected, I couldn't use the screen to watch movies or anything else because it wasn't 'STEADY' AT ALL, it moved every single time that the passenger who sat on that seat moved, that caused me fell dizzy and nauseous when I tried to use it, so I ended up with only sleeping and eating with no entertainment all my haul flight on premium economy seat, plus the passenger who sat next to me, she just loved to spread her very long hair down on my shoulder, face, arm, sometimes her hair just whacked my face till I really wanted to offer her my hairband!, super annoying 😑 and that my bad experience with that flight.

The flights were on time and the cabin crew were very nice. The only downside was that the food was not good.

Good pilot and crew. No food or beverage on this flight Entertainment is via own device thru plane's wifi.

My plans changed and I tried to cancel or change the flight for credit but was giving the run around and denied . Not great

Excellent service, excellent food and beverage options, plenty of leg room

Checking in as an international flyer is a bit tedious

I was so hungry , from Boston to Tokyo, only 2 big food .

It was okay, short flight so nothing much to comment.

The crew was nice, the food could be better, and at least 2 bathroom stalls were out of service.

The crew was attentive and provided everything I needed. The food in business class was excellent.

Everything you need to know for your flight from St. Louis to Kansai Intl

Information on your arrival and departure airports

St. Louis (STL)
Kansai Intl (KIX)