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$299+ Cheap flights from Illinois to Oslo

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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OSL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Illinois to Oslo

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

Round-trip from

$378
(CrystalTravel)

One-way from

$299
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$579
From Illinois to Oslo
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One-way flight from Illinois to Oslo
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Highest demand for flights based on searches. 16% potential increase in price ($119 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Illinois to Oslo

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

This CrystalTravel 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:30 pmORD - OSL
1 stop10h 05mIcelandair
Wed 11/191:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/14$378
This Sembo 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:25 pmORD - OSL
1 stop10h 10mIcelandair
Mon 11/31:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/15$380
This CrystalTravel 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:30 pmORD - OSL
1 stop10h 05mIcelandair
Thu 11/131:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/15$382
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.
Tue 12/27:10 amORD - OSL
2 stops19h 10mScandinavian Airlines
Mon 12/88:00 amOSL - ORD
1 stop15h 45mScandinavian Airlines
Deal found 9/14$385
This Flightnetwork deal was found by Cheapflights users on 9/16. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:25 pmORD - OSL
1 stop10h 10mIcelandair
Sat 11/11:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/16$388
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.
Thu 11/66:30 pmORD - OSL
1 stop10h 05mIcelandair
Wed 11/121:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/14$394
This oojo deal was found by Cheapflights users on 9/16. 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.
Wed 12/36:30 pmORD - OSL
1 stop10h 05mIcelandair
Sun 12/71:05 pmOSL - ORD
1 stop11h 15mIcelandair
Deal found 9/16$402
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:30 pmORD - OSL
1 stop10h 05mIcelandair
Mon 11/241:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/14$412
This Icelandair 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:30 pmORD - OSL
1 stop10h 05mIcelandair
Wed 11/261:10 pmOSL - ORD
1 stop11h 10mIcelandair
Deal found 9/14$419
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:40 pmMDW - OSL
2 stops36h 10mDelta
Sun 12/77:50 amOSL - MDW
2 stops22h 42mDelta
Deal found 9/15$541
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/21:14 pmMDW - OSL
2 stops17h 36mDelta
Mon 12/86:25 amOSL - MDW
2 stops18h 35mDelta
Deal found 9/16$545
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/151:50 pmMDW - OSL
2 stops17h 00mDelta
Tue 12/237:50 amOSL - MDW
2 stops16h 29mDelta
Deal found 9/14$571

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Oslo 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 Oslo that are best for you.

Fly from

Illinois

Fly to

Oslo

Route

Depart

Return

Price

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Wed 11/19

6:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

Mon 11/24

1:10 pm-5:20 pm

1 stop11h 10m

$412

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Wed 11/19

6:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

Sun 11/23

9:30 pm-5:20 pm

1 stop26h 50m

$421

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sun 11/30

7:20 pm-4:40 pm

1 stop14h 20m

Oslo Gardermoen

Thu 12/4

8:00 am-4:45 pm

1 stop15h 45m

$433

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Tue 11/18

10:30 am-6:15 pm

2 stops24h 45m

Oslo Gardermoen

Mon 11/24

12:10 pm-4:45 pm

1 stop11h 35m

$453

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Tue 11/18

10:30 am-11:15 am

2 stops17h 45m

Oslo Gardermoen

Sun 11/23

11:05 am-4:45 pm

1 stop12h 40m

$453

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sun 11/30

7:10 am-9:20 am

2 stops19h 10m

Oslo Gardermoen

Fri 12/5

8:00 am-4:45 pm

1 stop15h 45m

$460

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Tue 11/18

10:30 am-11:15 am

2 stops17h 45m

Oslo Gardermoen

Fri 11/28

11:05 am-4:45 pm

1 stop12h 40m

$483

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sat 10/18

10:40 am-12:15 pm

2 stops18h 35m

Oslo Gardermoen

Mon 11/3

1:00 pm-4:20 pm

1 stop34h 20m

$493

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Tue 11/18

7:15 am-12:10 pm

2 stops21h 55m

Oslo Gardermoen

Tue 11/25

6:45 am-2:55 pm

2 stops15h 10m

$494

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Tue 11/11

7:15 am-12:10 pm

2 stops21h 55m

Oslo Gardermoen

Tue 11/25

6:45 am-8:00 pm

2 stops20h 15m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 49 results
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Best time to book a flight from Illinois to Oslo

Have a flexible travel schedule? Discover the best time to fly to Oslo 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 Oslo

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

Currently, November is the cheapest month in which you can book a flight from Illinois to Oslo (average of $567). Flying from Illinois to Oslo in June is currently the most expensive (average of $1,006). 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 OSL?

Find hourly flight availability from Illinois to Oslo. 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 Oslo as you normally would.

How much does it cost to fly round-trip from Illinois to Oslo?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Oslo. 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 Oslo?

    Departing from Illinois to Oslo will take you 10h 05m. The distance from Illinois to Oslo is about 4039 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 Oslo one-way?

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $407. Air Canada flights start at $411 while deals on Delta start at $463 one-way.

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

    When deciding which route to take from Illinois to Oslo consider Chicago O'Hare Intl - Oslo Gardermoen, Chicago O'Hare Intl - Oslo Sandefjord or Chicago Midway - Oslo Gardermoen as they are the most popular.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Illinois to Oslo (average of $567). Flying from Illinois to Oslo in June is currently the most expensive (average of $1,006). 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

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Alternative routes for Illinois to Oslo

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Oslo Gardermoen flights
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Top 10 airlines flying from Illinois to Oslo

Discover the top 10 airlines that operate flights from Illinois to Oslo. 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
IcelandairCheapest$409Average$606FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$432Average$799FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$494Average$645FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$530Average$683FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$532Average$570FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$532Average$645FlexibilityNo cancel feeOn-time69%
KLMCheapest$550Average$751FlexibilityNo cancel feeOn-time75%
FinnairCheapest$555Average$677FlexibilityNo cancel feeOn-time76%
DeltaCheapest$562Average$802FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$605Average$634FlexibilityNo cancel feeOn-time79%

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