HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Osaka

$408+ Cheap flights from Illinois to Osaka (OSA)

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.
ORD — OSA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Osaka 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 Illinois to Osaka

Keep the following information in mind while searching for Illinois to Osaka flight deals. Data was last updated September 16, 2025.

Round-trip from

$723
(United Airlines)

One-way from

$408
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$1,084
From Illinois to Osaka (OSA)
Search Deals
One-way flight from Illinois to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Illinois to Osaka

Cheapest flights from Illinois to Osaka
Explore the most affordable flight options available from Illinois to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Expedia deal was found by Cheapflights users on 9/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:30 pmSTL - KIX
2 stops55h 20mUnited Airlines
Tue 9/304:50 pmKIX - STL
2 stops31h 02mUnited Airlines
Deal found 9/14$727
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 9/155:49 pmSTL - KIX
1 stop31h 01mUnited Airlines
Tue 9/234:50 pmKIX - STL
2 stops17h 56mUnited Airlines
Deal found 9/15$729
This United Airlines deal was found by Cheapflights users on 9/14. 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
Tue 9/234:50 pmKIX - STL
1 stop38h 03mUnited Airlines
Deal found 9/14$732
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 9/157:04 pmSTL - KIX
2 stops29h 46mUnited Airlines
Thu 9/258:25 amKIX - STL
3 stops27h 35mUnited Airlines
Deal found 9/15$733
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:30 pmSTL - KIX
2 stops31h 20mUnited Airlines
Fri 9/194:50 pmKIX - STL
2 stops33h 53mUnited Airlines
Deal found 9/13$741
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 9/155:49 pmSTL - ITM
2 stops33h 16mUnited Airlines
Mon 9/2212:00 pmITM - STL
2 stops48h 16mUnited Airlines
Deal found 9/14$743
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/283:40 pmORD - KIX
1 stop39h 25mCathay Pacific
Tue 11/49:50 amKIX - ORD
1 stop42h 10mCathay Pacific
Deal found 9/14$744
This FlightHub deal was found by Cheapflights users on 9/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/83:22 pmSTL - KIX
2 stops26h 03mJapan Airlines
Sat 12/207:00 amKIX - STL
2 stops24h 41mJapan Airlines
Deal found 9/14$748
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 9/187:04 pmSTL - KIX
2 stops29h 46mUnited Airlines
Thu 9/254:50 pmKIX - STL
2 stops19h 10mUnited Airlines
Deal found 9/15$757
This United Airlines deal was found by Cheapflights users on 9/13. 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 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
Sun 9/218:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 9/13$759
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 9/165:15 amSTL - KIX
2 stops19h 35mUnited Airlines
Sun 9/218:25 amKIX - STL
2 stops29h 19mUnited Airlines
Deal found 9/15$760
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:00 pmORD - KIX
1 stop24h 40mCathay Pacific
Tue 9/235:45 pmKIX - ORD
1 stop34h 40mCathay Pacific
Deal found 9/14$760

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Osaka 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 September 16, 2025.
Use the filters below to find and compare flights from Illinois to Osaka that are best for you.

Fly from

Illinois

Fly to

Osaka

Route

Depart

Return

Price

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Fri 9/19

5:30 pm-2:50 pm

2 stops55h 20m

Osaka Kansai Intl

Tue 9/30

4:50 pm-4:54 pm

1 stop38h 04m

$727

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/27

5:28 pm-2:50 pm

2 stops31h 22m

Osaka Kansai Intl

Wed 10/1

4:50 pm-10:00 pm

2 stops19h 10m

$741

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 12/8

6:55 am-6:50 pm

1 stop20h 55m

Osaka Kansai Intl

Sat 12/20

5:50 pm-11:51 pm

1 stop21h 01m

$767

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 9/20

4:32 pm-2:50 pm

2 stops32h 18m

Osaka Kansai Intl

Sun 9/28

4:50 pm-10:00 pm

2 stops19h 10m

$769

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Tue 11/11

2:35 pm-5:50 pm

1 stop36h 15m

Osaka Kansai Intl

Thu 11/20

6:05 pm-12:55 pm

1 stop33h 50m

$803

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

7:23 am-12:35 pm

2 stops39h 12m

Osaka Itami

Wed 9/24

8:30 am-1:31 pm

2 stops19h 01m

$888

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Sat 9/20

4:00 pm-6:40 am

1 stop24h 40m

Osaka Kansai Intl

Sun 9/28

6:35 pm-2:25 pm

1 stop33h 50m

$933

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Tue 10/28

3:35 pm-2:55 pm

2 stops33h 20m

Osaka Kansai Intl

Tue 11/4

4:15 pm-12:55 pm

2 stops35h 40m

$934

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Mon 10/27

12:30 am-11:55 am

1 stop21h 25m

Osaka Kansai Intl

Tue 11/4

12:55 pm-7:35 pm

1 stop21h 40m

$975

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Wed 10/1

7:09 pm-7:40 pm

2 stops34h 31m

Osaka Kansai Intl

Thu 10/16

7:35 am-11:45 pm

3 stops30h 10m

$1,026

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 58 results
1
2
3
...
6

Best time to book a flight from Illinois to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from Illinois 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 Illinois to Osaka

What is the cheapest month to book a flight from Illinois to Osaka?

Currently, February is the cheapest month in which you can book a flight from Illinois to Osaka (average of $859). Flying from Illinois to Osaka in June is currently the most expensive (average of $1,309). 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.

What is the cheapest time of day to fly from IL to OSA?

Find hourly flight availability from Illinois to Osaka. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

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

Related info for your journey

Find useful and relevant information for your journey from Illinois to Osaka. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Osaka?

    United Airlines, American Airlines, and Cathay Pacific can get you from Illinois to Osaka in just under 20h 55m. Your travel time can differ by up to 34h 25m. The distance from Illinois to Osaka is about 6595 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Osaka one-way?

    $408 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on United Airlines and Japan Airlines, with prices starting from $429 and $433, respectively.

  • What are the most popular routes from Illinois to Osaka?

    The most popular route from Illinois to Osaka is Chicago O'Hare Intl - Osaka Kansai Intl. You may also consider Chicago O'Hare Intl - Osaka Itami or Chicago O'Hare Intl - Kobe.

  • Can I find deals for flights from Illinois to Osaka that include hotel bookings?

    Yes. In addition to deals on Illinois to Osaka flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Osaka?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Osaka.

  • Can I find deals for business class flights from Illinois to Osaka?

    Yes. Cheapflights offers flight deals from Illinois to Osaka 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 Illinois to Osaka?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Osaka (average of $859). Flying from Illinois to Osaka in June is currently the most expensive (average of $1,309). 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 Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara
Nishinomiya

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 Illinois to Osaka

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Kansai Intl flights
San Francisco to Kansai Intl flights
Los Angeles to Itami flights
Honolulu to Kansai Intl flights
Seattle to Kansai Intl flights
San Francisco to Itami flights
John F Kennedy Intl to Kansai Intl flights
John F Kennedy Intl to Itami flights
Newark to Kansai Intl flights
Seattle to Itami flights
Newark to Itami flights
Ontario to Kansai Intl flights
LaGuardia to Kansai Intl flights
San Jose to Kansai Intl flights
Hobby to Kansai Intl flights
Honolulu to Itami flights
Santa Ana to Kansai Intl flights
Atlanta to Itami flights
Atlanta to Kansai Intl flights
Boston to Kansai Intl flights
Denver to Kansai Intl flights
Dallas/Fort Worth to Kansai Intl flights
Dulles Intl to Kansai Intl flights
LaGuardia to Itami flights
Portland to Kansai Intl flights
Boston to Itami flights
O'Hare Intl to Kansai Intl flights
George Bush Intcntl to Kansai Intl flights
O'Hare Intl to Itami flights
George Bush Intcntl to Itami flights
Dulles Intl to Itami flights
Columbus to Itami flights
San Diego to Kansai Intl flights
Denver to Itami flights
San Diego to Itami flights
Columbus to Kansai Intl flights
Baltimore to Kansai Intl flights
San Jose to Itami flights
Reagan-National to Kansai Intl flights
Austin to Kansai Intl flights
Austin to Itami flights
Portland to Itami flights
Sky Harbor Intl to Kansai Intl flights
Baltimore to Itami flights
Reagan-National to Itami flights
Philadelphia to Kansai Intl flights
Orlando to Kansai Intl flights

Top 4 airlines flying from Illinois to Osaka

Discover the top 4 airlines that operate flights from Illinois to Osaka. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$983Average$1,695FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$1,025Average$1,391FlexibilityNo cancel feeOn-time67%
EVA AirCheapest$1,097Average$1,293FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,099Average$1,698FlexibilityNo cancel feeOn-time69%

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.