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$285+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

Round-trip from

$352
(Ticket)

One-way from

$285
(Finnair)

Popular in

July

Cheapest in

September

Average price

$537
From Oslo to Illinois
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One-way flight from Oslo to Illinois
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Highest demand for flights based on searches. 12% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 30, 2025.

This Ticket deal was found by Cheapflights users on 10/30. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:00 amOSL - ORD
1 stop13h 45mScandinavian Airlines
Sun 12/287:20 pmORD - OSL
1 stop15h 30mScandinavian Airlines
Deal found 10/30$352
This Flightnetwork deal was found by Cheapflights users on 10/29. 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.
Fri 12/55:55 amOSL - ORD
1 stop17h 50mScandinavian Airlines
Sun 12/77:20 pmORD - OSL
1 stop20h 10mScandinavian Airlines
Deal found 10/29$373
This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/142:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Sun 12/287:20 pmORD - TRF
1 stop14h 45mScandinavian Airlines
Deal found 10/30$386
This Ticket deal was found by Cheapflights users on 10/30. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:10 pmOSL - ORD
1 stop11h 10mIcelandair
Sat 11/156:30 pmORD - OSL
1 stop10h 05mIcelandair
Deal found 10/30$408
This Scandinavian Airlines deal was found by Cheapflights users on 10/29. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Mon 12/297:20 pmORD - TRF
1 stop14h 45mScandinavian Airlines
Deal found 10/29$410
This Scandinavian Airlines deal was found by Cheapflights users on 10/29. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:55 amOSL - ORD
1 stop17h 50mScandinavian Airlines
Mon 12/87:20 pmORD - OSL
1 stop18h 00mScandinavian Airlines
Deal found 10/29$411
This Scandinavian Airlines deal was found by Cheapflights users on 10/29. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/213:00 pmOSL - ORD
1 stop32h 45mScandinavian Airlines
Mon 12/297:20 pmORD - OSL
1 stop15h 00mScandinavian Airlines
Deal found 10/29$412
This Travelis deal was found by Cheapflights users on 10/29. 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.
Wed 12/242:50 pmOSL - ORD
1 stop32h 55mScandinavian Airlines
Sun 1/47:20 pmORD - OSL
1 stop15h 00mScandinavian Airlines
Deal found 10/29$467
This Delta deal was found by Cheapflights users on 10/29. 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.
Fri 12/59:25 amOSL - ORD
1 stop11h 55mDelta
Sun 12/77:00 amORD - OSL
2 stops18h 40mDelta
Deal found 10/29$481
This Flysmarter deal was found by Cheapflights users on 10/29. 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.
Fri 12/56:15 amOSL - ORD
2 stops15h 40mAir Canada
Sun 12/712:50 pmORD - OSL
2 stops17h 15mAir Canada
Deal found 10/29$482
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/119:25 amOSL - ORD
2 stops18h 04mDelta
Sat 11/1510:35 amORD - OSL
2 stops15h 05mDelta
Deal found 10/30$486
This Delta deal was found by Cheapflights users on 10/29. 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 12/66:30 amOSL - MDW
2 stops18h 48mDelta
Mon 12/86:40 pmMDW - OSL
2 stops36h 10mDelta
Deal found 10/29$498

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 October 30, 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

TRF - ORD

TRFORD

Oslo Sandefjord

Sun 12/14

2:35 pm-4:45 pm

1 stop33h 10m

Chicago O'Hare Intl

Sun 12/28

7:20 pm-5:05 pm

1 stop14h 45m

$386

OsloChicago

TRF - ORD

TRFORD

Oslo Sandefjord

Tue 12/23

2:35 pm-4:45 pm

1 stop33h 10m

Chicago O'Hare Intl

Mon 12/29

7:20 pm-5:05 pm

1 stop14h 45m

$410

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 12/4

5:55 am-4:45 pm

1 stop17h 50m

Chicago O'Hare Intl

Mon 12/8

7:20 pm-8:20 pm

1 stop18h 00m

$411

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 12/23

9:05 pm-4:45 pm

1 stop26h 40m

Chicago O'Hare Intl

Mon 12/29

7:20 pm-9:20 am

1 stop31h 00m

$412

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 12/23

9:05 pm-4:45 pm

1 stop26h 40m

Chicago O'Hare Intl

Wed 12/31

7:20 pm-2:15 pm

1 stop11h 55m

$474

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 11/20

12:40 pm-2:20 pm

1 stop32h 40m

Chicago O'Hare Intl

Wed 12/3

5:20 pm-4:20 pm

1 stop16h 00m

$499

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 12/4

9:25 am-6:27 pm

2 stops16h 02m

Chicago O'Hare Intl

Mon 12/8

5:20 pm-4:20 pm

1 stop16h 00m

$504

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 3/31

6:45 am-2:50 pm

1 stop15h 05m

Chicago O'Hare Intl

Wed 7/29

10:00 am-5:15 pm

2 stops24h 15m

$517

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Thu 2/26

7:05 am-7:30 pm

2 stops19h 25m

Lambert-St Louis

Mon 3/2

6:59 pm-10:40 pm

2 stops20h 41m

$519

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Fri 11/14

6:30 am-4:33 pm

2 stops17h 03m

Lambert-St Louis

Tue 11/18

11:39 am-8:40 am

2 stops14h 01m

$519

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 52 results
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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, November is the cheapest month in which you can book a flight from Oslo to Illinois (average of $342). Flying from Oslo to Illinois in July is currently the most expensive (average of $555). 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 October 30, 2025.

One of the essential ways to save on airfare from Oslo to Illinois is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 18% on airfare.

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 October 30, 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
1,548 reviews

Crew

8.0

Comfort

7.3

Food

6.6

Entertainment

6.6

Boarding

7.6

Overall

7.4

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
1,548 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Crew

8.0

Comfort

7.3

Food

6.6

Entertainment

6.6

Boarding

7.6

Overall

7.4

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
7.1
Good
562 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Crew

8.0

Comfort

7.3

Food

6.6

Entertainment

6.6

Boarding

7.6

Overall

7.4

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
7,542 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Crew

8.0

Comfort

7.3

Food

6.6

Entertainment

6.6

Boarding

7.6

Overall

7.4

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
7,488 reviews
Scandinavian Airlines
7.4
Good
1,548 reviews

Crew

8.0

Comfort

7.3

Food

6.6

Entertainment

6.6

Boarding

7.6

Overall

7.4

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 19h 25m. Fly via Scandinavian Airlines, Delta, or American Airlines to get the fastest option. There are 4296 mi between Oslo and Illinois. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $293 on Finnair. Other airlines that offer cheap prices include American Airlines from $312 and Scandinavian Airlines from $432 one-way.

  • 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, November is the cheapest month in which you can book a flight from Oslo to Illinois (average of $342). Flying from Oslo to Illinois in July is currently the most expensive (average of $555). 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 Oslo to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Oslo to Illinois

Discover the top airline that operate flights from Oslo to Illinois. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$521Average$620FlexibilityNo cancel feeOn-time77%

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