HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$286+ Cheap flights from Oslo to Illinois

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
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 Oslo to Illinois 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 Oslo to Illinois

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

Round-trip from

$418
(Travelis)

One-way from

$286
(Finnair)

Popular in

July

Cheapest in

November

Average price

$454
From Oslo to Illinois
Search Deals
One-way flight from Oslo to Illinois
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Oslo to Illinois

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

This Travelis 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:50 pmOSL - ORD
1 stop14h 25mIcelandair
Thu 10/307:30 pmORD - OSL
1 stop10h 05mIcelandair
Deal found 9/16$418
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.
Sat 11/151:10 pmOSL - ORD
1 stop11h 10mIcelandair
Sat 11/296:30 pmORD - OSL
1 stop10h 05mIcelandair
Deal found 9/14$434
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:45 amOSL - ORD
1 stop13h 55mBritish Airways
Wed 10/297:25 pmORD - OSL
1 stop12h 45mBritish Airways
Deal found 9/16$450
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 10/231:50 pmOSL - ORD
1 stop11h 25mIcelandair
Tue 10/287:30 pmORD - OSL
1 stop10h 05mIcelandair
Deal found 9/14$459
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:45 amOSL - ORD
1 stop13h 55mAmerican Airlines
Tue 10/289:45 pmORD - OSL
1 stop18h 55mAmerican Airlines
Deal found 9/15$462
This Flysmarter 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:45 amOSL - ORD
2 stops19h 26mMultiple Airlines
Wed 10/299:45 pmORD - OSL
1 stop18h 55mMultiple Airlines
Deal found 9/16$464
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:05 amOSL - ORD
1 stop16h 55mAmerican Airlines
Mon 12/88:45 pmORD - OSL
1 stop31h 10mAmerican Airlines
Deal found 9/13$465
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:25 amOSL - STL
2 stops20h 26mMultiple Airlines
Fri 11/71:29 pmSTL - OSL
2 stops27h 26mMultiple Airlines
Deal found 9/16$468
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:45 amOSL - ORD
2 stops21h 54mAmerican Airlines
Wed 10/296:36 pmORD - OSL
2 stops22h 04mAmerican Airlines
Deal found 9/16$470
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.
Thu 10/236:30 amOSL - ORD
2 stops16h 41mDelta
Tue 10/284:56 pmORD - OSL
2 stops14h 54mDelta
Deal found 9/15$471
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.
Thu 10/236:30 amOSL - MDW
2 stops18h 55mDelta
Tue 10/286:23 pmMDW - OSL
2 stops13h 27mDelta
Deal found 9/15$471
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.
Sat 12/69:25 amOSL - MDW
2 stops15h 41mDelta
Mon 12/89:34 amMDW - OSL
2 stops21h 16mDelta
Deal found 9/14$486

Cheapflights Fare Finder

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

Fly from

Oslo

Fly to

Illinois

Route

Depart

Return

Price

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 10/17

4:30 pm-9:15 pm

1 stop11h 45m

Chicago O'Hare Intl

Thu 10/30

7:30 pm-11:35 am

1 stop10h 05m

$419

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 10/23

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 10/28

7:30 pm-11:35 am

1 stop10h 05m

$459

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 10/23

7:45 am-2:40 pm

1 stop13h 55m

Chicago O'Hare Intl

Tue 10/28

9:45 pm-10:40 pm

1 stop18h 55m

$462

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 10/16

7:45 am-8:11 pm

2 stops19h 26m

Chicago O'Hare Intl

Wed 10/29

9:45 pm-10:40 pm

1 stop18h 55m

$464

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 10/23

6:30 am-2:10 pm

1 stop14h 40m

Chicago O'Hare Intl

Tue 10/28

3:50 pm-1:50 pm

2 stops16h 00m

$465

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 12/4

7:05 am-3:25 pm

1 stop15h 20m

Chicago O'Hare Intl

Mon 12/8

6:35 pm-10:40 pm

1 stop21h 05m

$465

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Fri 10/31

6:25 am-8:51 pm

2 stops20h 26m

Lambert-St Louis

Fri 11/7

1:29 pm-11:55 pm

2 stops27h 26m

$468

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sun 10/12

7:45 am-7:30 pm

2 stops18h 45m

Chicago O'Hare Intl

Sun 10/19

10:35 pm-11:40 pm

1 stop18h 05m

$471

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Thu 10/23

6:30 am-6:25 pm

2 stops18h 55m

Chicago Midway

Tue 10/28

6:23 pm-1:50 pm

2 stops13h 27m

$471

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Thu 2/26

7:05 am-7:03 pm

2 stops18h 58m

Lambert-St Louis

Mon 3/2

5:49 pm-6:40 pm

2 stops17h 51m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 52 results
1
2
3
...
6

Best time to book a flight from Oslo to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Oslo to Illinois (average of $245). Flying from Oslo to Illinois in March is currently the most expensive (average of $321). 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 OSL to IL?

Find hourly flight availability from Oslo to Illinois. 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.

When flying from Oslo to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 16, 2025.
Read reviews from past customers who have flown Scandinavian Airlines, Icelandair, and Lufthansa from Oslo to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
1,486 reviews

Entertainment

6.6

Overall

7.4

Food

6.7

Crew

8.0

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Scandinavian Airlines
7.4
Good
1,486 reviews
Scandinavian Airlines
7.4
Good
1,486 reviews

Entertainment

6.6

Overall

7.4

Food

6.7

Crew

8.0

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Icelandair
7.0
Good
544 reviews
Scandinavian Airlines
7.4
Good
1,486 reviews

Entertainment

6.6

Overall

7.4

Food

6.7

Crew

8.0

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Lufthansa
6.8
Okay
7,407 reviews
Scandinavian Airlines
7.4
Good
1,486 reviews

Entertainment

6.6

Overall

7.4

Food

6.7

Crew

8.0

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
British Airways
6.7
Okay
7,363 reviews
Scandinavian Airlines
7.4
Good
1,486 reviews

Entertainment

6.6

Overall

7.4

Food

6.7

Crew

8.0

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
8.0
Excellent

Scott,Sep 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.

Related info for your journey

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

    There are many flights that can get you from Oslo to Illinois in 11h 45m. Fly via Icelandair, American Airlines, or Delta to get the fastest option. There are 4039 mi between Oslo and Illinois. This flight may include one or multiple stops.

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

    While some choose either Oslo Gardermoen - Chicago Midway or Oslo Sandefjord - Chicago O'Hare Intl, Oslo Gardermoen - Chicago O'Hare Intl is the most popular route from Oslo to Illinois.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Oslo to Illinois (average of $245). Flying from Oslo to Illinois in March is currently the most expensive (average of $321). 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

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 Oslo to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Oslo Gardermoen to Newark flights
Oslo Gardermoen to John F Kennedy Intl flights
Oslo Gardermoen to LaGuardia flights
Sandefjord to John F Kennedy Intl flights
Oslo Gardermoen to Miami flights
Oslo Gardermoen to Hobby flights
Oslo Gardermoen to Seattle flights
Oslo Gardermoen to Fort Lauderdale flights
Oslo Gardermoen to Los Angeles flights
Oslo Gardermoen to West Palm Beach flights
Oslo Gardermoen to George Bush Intcntl flights
Oslo Gardermoen to Orlando flights
Sandefjord to Los Angeles flights
Oslo Gardermoen to O'Hare Intl flights
Oslo Gardermoen to Las Vegas flights
Bergen to John F Kennedy Intl flights
Bergen to Newark flights
Oslo Gardermoen to Dallas/Fort Worth flights
Oslo Gardermoen to Dulles Intl flights
Sandefjord to Newark flights
Oslo Gardermoen to Reagan-National flights
Oslo Gardermoen to Honolulu flights
Oslo Gardermoen to San Francisco flights
Oslo Gardermoen to Boston flights
Oslo Gardermoen to Tampa flights
Oslo Gardermoen to Denver flights
Oslo Gardermoen to Minneapolis flights
Sandefjord to Seattle flights
Oslo Gardermoen to Philadelphia flights
Oslo Gardermoen to Sky Harbor Intl flights
Oslo Gardermoen to Baltimore flights
Stavanger to John F Kennedy Intl flights
Oslo Gardermoen to Detroit flights
Oslo Gardermoen to Portland flights
Sandefjord to George Bush Intcntl flights
Stavanger to Newark flights
Sandefjord to Las Vegas flights
Oslo Gardermoen to Austin flights
Bergen to Miami flights
Sandefjord to Boston flights
Bergen to Los Angeles flights
Oslo Gardermoen to Nashville flights

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.