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$237+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
Mon 6/155:05 pm
OSL
-
ORD
1 stop26h 25m
Multiple Airlines
Sun 6/219:15 pm
ORD
-
OSL
1 stop19h 25m
Multiple Airlines
Deal found 1/27$392
This Ticket deal was found by Cheapflights users on 1/27. 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.
Mon 4/131:50 pm
OSL
-
ORD
1 stop11h 25m
Icelandair
Tue 4/217:25 pm
ORD
-
OSL
1 stop10h 10m
Icelandair
Deal found 1/27$393
This Ticket deal was found by Cheapflights users on 1/27. 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 2/81:05 pm
OSL
-
ORD
1 stop11h 15m
Icelandair
Sat 2/216:30 pm
ORD
-
OSL
1 stop10h 05m
Icelandair
Deal found 1/27$407
This Ticket deal was found by Cheapflights users on 1/27. 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 3/89:30 pm
OSL
-
ORD
1 stop26h 50m
Icelandair
Tue 3/247:30 pm
ORD
-
OSL
1 stop10h 05m
Icelandair
Deal found 1/27$415
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Mon 4/201:50 pm
OSL
-
ORD
1 stop11h 25m
Icelandair
Sun 4/267:25 pm
ORD
-
OSL
1 stop10h 10m
Icelandair
Deal found 1/27$442
This Ticket deal was found by Cheapflights users on 1/28. 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.
Fri 4/179:20 am
OSL
-
ORD
1 stop11h 55m
Multiple Airlines
Thu 4/305:10 pm
ORD
-
OSL
1 stop11h 35m
Multiple Airlines
Deal found 1/28$455
This Travelis deal was found by Cheapflights users on 1/28. 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 4/178:30 pm
OSL
-
ORD
2 stops28h 05m
Finnair
Thu 4/309:30 pm
ORD
-
OSL
1 stop15h 15m
Finnair
Deal found 1/28$470
This Icelandair deal was found by Cheapflights users on 1/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:50 pm
OSL
-
ORD
1 stop11h 25m
Icelandair
Sat 4/257:25 pm
ORD
-
OSL
1 stop10h 10m
Icelandair
Deal found 1/29$474
This Delta deal was found by Cheapflights users on 1/27. 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 4/136:30 am
OSL
-
MDW
2 stops18h 28m
Delta
Tue 4/211:23 pm
MDW
-
OSL
2 stops17h 22m
Delta
Deal found 1/27$495
This Delta deal was found by Cheapflights users on 1/27. 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 4/206:30 am
OSL
-
MDW
2 stops18h 28m
Delta
Sun 4/266:38 pm
MDW
-
OSL
2 stops14h 42m
Delta
Deal found 1/27$509
This Delta deal was found by Cheapflights users on 1/27. 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 2/256:30 am
OSL
-
MDW
2 stops19h 10m
Delta
Wed 3/410:49 am
MDW
-
OSL
2 stops14h 51m
Delta
Deal found 1/27$511
This British Airways deal was found by Cheapflights users on 1/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:50 am
OSL
-
STL
2 stops18h 58m
British Airways
Sun 3/86:33 pm
STL
-
OSL
2 stops22h 07m
British Airways
Deal found 1/26$539

Find flight deals from Oslo to Illinois

Keep the following information in mind while searching for Oslo to Illinois flight deals. Data was last updated January 29, 2026.

Round-trip from

$392
(Cheapflightsfares)

One-way from

$237
(Mytrip)

Popular in

July

Cheapest in

November

Average price

$479
From Oslo to Illinois
Search Deals
One-way flight from Oslo to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($88 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 January 2026
Search Deals

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 January 29, 2026.
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

Sat 4/18

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Sat 4/25

7:25 pm-12:35 pm

1 stop10h 10m

$474

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 5/29

4:30 pm-9:25 pm

1 stop11h 55m

Chicago O'Hare Intl

Fri 6/5

7:25 pm-3:25 pm

1 stop13h 00m

$489

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 4/13

6:30 am-2:30 pm

1 stop15h 00m

Chicago O'Hare Intl

Tue 4/21

1:36 pm-1:45 pm

2 stops17h 09m

$490

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Mon 4/13

6:30 am-5:58 pm

2 stops18h 28m

Chicago Midway

Tue 4/21

1:23 pm-1:45 pm

2 stops17h 22m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 5/29

4:30 pm-9:25 pm

1 stop11h 55m

Chicago O'Hare Intl

Mon 6/8

10:25 pm-3:25 pm

1 stop10h 00m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/28

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Mon 6/8

10:25 pm-3:25 pm

1 stop10h 00m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/28

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Sun 6/7

10:25 pm-3:25 pm

1 stop10h 00m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 5/29

4:30 pm-9:25 pm

1 stop11h 55m

Chicago O'Hare Intl

Sat 6/6

10:25 pm-3:25 pm

1 stop10h 00m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/28

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Fri 6/5

7:25 pm-12:35 pm

1 stop10h 10m

$495

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 4/20

12:50 pm-5:50 pm

1 stop12h 00m

Chicago O'Hare Intl

Sun 4/26

4:16 pm-4:35 pm

2 stops17h 19m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 60 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, April is the cheapest month in which you can book a flight from Oslo to Illinois (average of $340). Flying from Oslo to Illinois in July is currently the most expensive (average of $565). 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.

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 January 29, 2026.
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
7.3
Good
1,674 reviews

Overall

7.3

Entertainment

6.6

Food

6.7

Crew

8.0

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Scandinavian Airlines
7.3
Good
1,674 reviews
Scandinavian Airlines
7.3
Good
1,674 reviews

Overall

7.3

Entertainment

6.6

Food

6.7

Crew

8.0

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Icelandair
7.1
Good
606 reviews
Scandinavian Airlines
7.3
Good
1,674 reviews

Overall

7.3

Entertainment

6.6

Food

6.7

Crew

8.0

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Lufthansa
6.8
Okay
7,756 reviews
Scandinavian Airlines
7.3
Good
1,674 reviews

Overall

7.3

Entertainment

6.6

Food

6.7

Crew

8.0

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that

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 25m. Fly via Icelandair, Delta, or British Airways to get the fastest option. There are 4039 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 $398 on British Airways. Other airlines that offer cheap prices include Icelandair from $437 and Scandinavian Airlines from $502 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, April is the cheapest month in which you can book a flight from Oslo to Illinois (average of $340). Flying from Oslo to Illinois in July is currently the most expensive (average of $565). 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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