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Oslo

$254+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OSL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Air France deal was found by Cheapflights users on 12/17. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:20 pmORD - OSL
1 stop12h 20mMultiple Airlines
Thu 1/812:40 pmOSL - ORD
1 stop32h 40mMultiple Airlines
Deal found 12/17$539
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:10 pmORD - OSL
2 stops16h 30mLufthansa
Thu 12/251:45 pmOSL - ORD
1 stop13h 20mLufthansa
Deal found 12/17$540
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1711:00 amORD - OSL
2 stops21h 20mUnited Airlines
Wed 12/241:50 pmOSL - ORD
1 stop13h 15mUnited Airlines
Deal found 12/16$559
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/201:24 pmORD - OSL
2 stops14h 36mUnited Airlines
Mon 12/222:05 pmOSL - ORD
1 stop28h 05mUnited Airlines
Deal found 12/16$565
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/171:05 pmORD - OSL
2 stops16h 55mUnited Airlines
Thu 12/251:45 pmOSL - ORD
2 stops36h 07mUnited Airlines
Deal found 12/17$569
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:50 pmORD - OSL
1 stop12h 50mLufthansa
Thu 1/811:50 amOSL - ORD
2 stops29h 55mLufthansa
Deal found 12/17$614
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/247:05 amORD - OSL
2 stops22h 55mUnited Airlines
Sat 1/109:35 amOSL - ORD
2 stops32h 25mUnited Airlines
Deal found 12/15$751
This Expedia deal was found by Cheapflights users on 12/17. 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.
Wed 12/174:10 pmORD - OSL
1 stop13h 00mMultiple Airlines
Thu 12/251:45 pmOSL - ORD
1 stop13h 20mMultiple Airlines
Deal found 12/17$792
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:20 pmORD - TRF
1 stop14h 45mScandinavian Airlines
Thu 1/82:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Deal found 12/15$922
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 pmORD - TRF
1 stop11h 45mScandinavian Airlines
Thu 1/82:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Deal found 12/15$949
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:20 pmORD - TRF
1 stop10h 40mScandinavian Airlines
Thu 1/82:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Deal found 12/15$957
This SmartFares deal was found by Cheapflights users on 12/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:20 pmORD - TRF
1 stop11h 45mMultiple Airlines
Wed 1/74:40 pmTRF - ORD
2 stops31h 05mMultiple Airlines
Deal found 12/15$1,087

Find flight deals from Illinois to Oslo

Keep the following information in mind while searching for Illinois to Oslo flight deals. Data was last updated December 18, 2025.

Round-trip from

$361
(Ticket)

One-way from

$254
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$612
From Illinois to Oslo
Search Deals
One-way flight from Illinois to Oslo
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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

Sat 1/17

7:20 pm-6:15 pm

1 stop15h 55m

Oslo Gardermoen

Fri 1/23

8:00 am-4:45 pm

1 stop15h 45m

$434

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Fri 2/27

8:15 pm-12:10 pm

1 stop32h 55m

Oslo Gardermoen

Tue 3/10

6:45 pm-4:00 pm

1 stop27h 15m

$438

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Wed 3/18

7:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

Sun 3/29

4:30 pm-6:15 pm

1 stop32h 45m

$466

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Thu 1/29

6:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

Tue 2/3

1:10 pm-5:20 pm

1 stop11h 10m

$468

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Fri 5/1

3:35 pm-10:55 am

1 stop12h 20m

Oslo Gardermoen

Tue 5/12

6:45 am-12:00 pm

1 stop12h 15m

$486

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Mon 1/19

9:50 pm-5:40 pm

1 stop12h 50m

Oslo Gardermoen

Mon 1/26

6:15 am-8:10 pm

2 stops20h 55m

$491

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Fri 1/30

6:30 pm-11:35 am

1 stop10h 05m

Oslo Gardermoen

Tue 2/3

1:10 pm-5:20 pm

1 stop11h 10m

$492

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sat 4/18

7:15 pm-7:00 pm

1 stop16h 45m

Oslo Gardermoen

Mon 4/27

6:00 am-4:10 pm

1 stop17h 10m

$500

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sat 4/25

10:30 pm-12:05 am

1 stop18h 35m

Oslo Gardermoen

Sat 5/2

6:25 pm-7:55 pm

2 stops32h 30m

$504

ChicagoOslo

ORD - OSL

ORDOSL

Chicago O'Hare Intl

Sat 4/18

4:40 pm-11:35 pm

2 stops23h 55m

Oslo Gardermoen

Mon 4/27

8:30 pm-5:43 pm

2 stops52h 13m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 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, December is the cheapest month in which you can book a flight from Illinois to Oslo (average of $378). Flying from Illinois to Oslo in June is currently the most expensive (average of $621). 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 December 18, 2025.

When flying from Illinois to Oslo, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 14% versus a flight in the afternoon.

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 $213. Lufthansa flights start at $387 while deals on SWISS start at $387 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, December is the cheapest month in which you can book a flight from Illinois to Oslo (average of $378). Flying from Illinois to Oslo in June is currently the most expensive (average of $621). 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.
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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$388Average$784FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$417Average$601FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$494Average$628FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$505Average$572FlexibilityNo cancel feeOn-time71%
SWISSCheapest$513Average$634FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$530Average$685FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$532Average$642FlexibilityNo cancel feeOn-time69%
DeltaCheapest$544Average$775FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$544Average$757FlexibilityNo cancel feeOn-time75%
FinnairCheapest$555Average$629FlexibilityNo cancel feeOn-time76%

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