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$372+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OSA
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
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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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$785
(United)

One-way from

$372
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$1,628
Provider with most accurate pricing for Chicago (CHI)-Osaka (OSA) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Osaka (OSA) flights.
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From Illinois to Osaka (OSA)
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One-way flight from Illinois to Osaka (OSA)
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Highest demand for flights based on searches. 11% potential increase in price ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 2, 2025.

This Justfly.com deal was found by Cheapflights users on 3/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:15 amSTL - KIX
2 stops25h 35mANA
Wed 10/87:00 amKIX - STL
2 stops26h 25mANA
Deal found 3/31$740
This United Airlines deal was found by Cheapflights users on 3/31. 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 9/297:15 amSTL - KIX
1 stop17h 35mUnited Airlines
Wed 10/88:30 amKIX - STL
2 stops24h 55mUnited Airlines
Deal found 3/31$751
This United deal was found by Cheapflights users on 3/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:45 pmSTL - ITM
2 stops33h 20mUnited Airlines
Sun 9/2812:00 pmITM - STL
2 stops23h 04mUnited Airlines
Deal found 3/31$797
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:20 pmSTL - ITM
2 stops37h 50mANA
Sun 9/2810:00 amITM - STL
2 stops23h 25mANA
Deal found 3/31$808
This Air Canada deal was found by Cheapflights users on 3/31. 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.
Mon 7/75:30 pmSTL - KIX
2 stops32h 55mAir Canada
Mon 9/86:05 pmKIX - STL
2 stops35h 11mAir Canada
Deal found 3/31$823
This FlightHub deal was found by Cheapflights users on 3/31. 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 12/86:25 amSTL - KIX
2 stops24h 55mJapan Airlines
Sat 12/209:10 pmKIX - STL
2 stops28h 57mJapan Airlines
Deal found 3/31$824
This StudentUniverse deal was found by Cheapflights users on 4/1. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:00 pmORD - KIX
1 stop24h 40mCathay Pacific
Wed 9/174:20 pmKIX - ORD
2 stops36h 05mCathay Pacific
Deal found 4/1$887
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:15 amSTL - ITM
2 stops21h 20mAmerican Airlines
Thu 5/18:30 amITM - STL
2 stops22h 06mAmerican Airlines
Deal found 4/1$959
This Booking.com deal was found by Cheapflights users on 3/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/204:05 pmSTL - ITM
3 stops36h 50mAir Canada
Sun 9/282:05 pmITM - STL
2 stops19h 52mAir Canada
Deal found 3/30$1,011
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:20 pmORD - KIX
1 stop31h 35mTurkish Airlines
Tue 12/1610:30 pmKIX - ORD
1 stop26h 40mTurkish Airlines
Deal found 3/30$1,011
This Mytrip deal was found by Cheapflights users on 4/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2310:26 pmORD - KIX
2 stops33h 49mMultiple Airlines
Thu 5/87:40 amKIX - ORD
3 stops35h 45mMultiple Airlines
Deal found 4/1$1,042
This FlightHub deal was found by Cheapflights users on 3/31. 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 9/2212:30 amORD - KIX
1 stop21h 40mEVA Air
Mon 11/1712:55 pmKIX - ORD
1 stop21h 40mEVA Air
Deal found 3/31$1,094

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 April 2, 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

Sat 9/20

4:32 pm-2:50 pm

2 stops32h 18m

Osaka Kansai Intl

Sun 9/28

4:50 pm-2:18 pm

2 stops35h 28m

$785

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

5:45 pm-5:05 pm

2 stops33h 20m

Osaka Itami

Sun 9/28

12:00 pm-9:04 pm

2 stops23h 04m

$797

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

3:20 pm-7:10 pm

2 stops37h 50m

Osaka Itami

Sun 9/28

10:00 am-7:25 pm

2 stops23h 25m

$808

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

5:30 pm-4:25 pm

2 stops32h 55m

Osaka Kansai Intl

Mon 9/8

6:05 pm-3:16 pm

2 stops35h 11m

$823

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Mon 4/21

4:00 pm-6:40 am

1 stop24h 40m

Osaka Kansai Intl

Tue 5/6

10:00 am-2:25 pm

1 stop42h 25m

$888

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 4/26

6:15 am-5:35 pm

2 stops21h 20m

Osaka Itami

Thu 5/1

8:30 am-4:36 pm

2 stops22h 06m

$959

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Mon 7/7

8:26 am-8:25 am

2 stops33h 59m

Osaka Kansai Intl

Mon 9/8

5:55 pm-10:59 pm

1 stop19h 04m

$982

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sat 9/20

4:05 pm-6:55 pm

3 stops36h 50m

Osaka Itami

Sun 9/28

2:05 pm-7:57 pm

2 stops19h 52m

$1,011

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Wed 4/23

10:26 pm-10:15 pm

2 stops33h 49m

Osaka Kansai Intl

Thu 5/8

7:40 am-5:25 am

3 stops35h 45m

$1,042

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Mon 4/21

5:00 am-4:25 pm

2 stops21h 25m

Osaka Kansai Intl

Tue 5/6

6:05 pm-2:47 pm

2 stops34h 42m

$1,126

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 55 results
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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 $898). Flying from Illinois to Osaka in December is currently the most expensive (average of $1,350). 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 April 2, 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.

Rainfall in Osaka by month

Plan your trip to Osaka by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Osaka 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 when rainfall is around 1.6 in.

Temperature in Osaka by month

Plan your trip to Osaka by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Osaka, 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).

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated April 2, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and Japan Airlines from Illinois to Osaka by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,170 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,052 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
ANA
8.3
Very good
830 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Delta
8.0
Very good
7,898 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Overall

8.4

Comfort

8.3

Boarding

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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.

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

    $372 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Japan Airlines, with prices starting from $376 and $391, 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 $898). Flying from Illinois to Osaka in December is currently the most expensive (average of $1,350). 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 Illinois?

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

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Alternative routes for Illinois to Osaka

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Illinois to Osaka

Discover the top 5 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$983Average$1,604FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$998Average$1,114FlexibilityNo cancel feeOn-time67%
EVA AirCheapest$1,090Average$1,284FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,099Average$1,581FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$1,318Average$1,440FlexibilityNo cancel feeOn-time79%

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