HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$368+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$451
(Flightsearch)

One-way from

$368
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$682
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 ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 31, 2025.

This Flightsearch deal was found by Cheapflights users on 7/29. 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 Flightsearch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/157:50 amOSL - STL
2 stops17h 40mBritish Airways
Tue 8/198:01 pmSTL - OSL
2 stops20h 24mBritish Airways
Deal found 7/29$451
This Delta deal was found by Cheapflights users on 7/31. 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 8/236:30 amOSL - MDW
2 stops19h 07mDelta
Mon 9/156:15 pmMDW - OSL
2 stops15h 25mDelta
Deal found 7/31$474
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 9/136:00 amOSL - ORD
2 stops18h 30mDelta
Sat 9/201:00 pmORD - OSL
2 stops15h 05mDelta
Deal found 7/30$501
This Flysmarter deal was found by Cheapflights users on 7/31. 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.
Sat 8/235:40 amOSL - ORD
1 stop14h 10mMultiple Airlines
Mon 9/152:00 pmORD - OSL
2 stops17h 10mMultiple Airlines
Deal found 7/31$503
This Austrian Airlines deal was found by Cheapflights users on 7/31. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/142:55 pmOSL - ORD
2 stops34h 30mAustrian Airlines
Sun 9/219:25 pmORD - OSL
2 stops57h 45mAustrian Airlines
Deal found 7/31$506
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:35 pmTRF - ORD
1 stop33h 10mScandinavian Airlines
Mon 12/87:00 amORD - TRF
2 stops24h 05mScandinavian Airlines
Deal found 7/30$507
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:45 amOSL - ORD
2 stops20h 13mUnited Airlines
Sat 10/410:30 pmORD - OSL
1 stop27h 25mUnited Airlines
Deal found 7/30$514
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Thu 9/256:45 amOSL - ORD
2 stops15h 19mAir Canada
Thu 10/93:50 pmORD - OSL
2 stops16h 50mAir Canada
Deal found 7/31$554
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/238:20 amOSL - ORD
2 stops18h 51mAmerican Airlines
Mon 9/155:40 pmORD - OSL
1 stop22h 50mAmerican Airlines
Deal found 7/30$565
This Brussels Airlines deal was found by Cheapflights users on 7/31. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:05 pmOSL - ORD
2 stops30h 15mBrussels Airlines
Sun 9/146:00 pmORD - OSL
2 stops16h 15mBrussels Airlines
Deal found 7/31$568
This British Airways deal was found by Cheapflights users on 7/31. 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.
Thu 9/257:45 amOSL - ORD
1 stop17h 30mBritish Airways
Thu 10/91:43 pmORD - OSL
2 stops19h 32mBritish Airways
Deal found 7/31$573
This Ticket deal was found by Cheapflights users on 7/31. 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 8/226:30 amOSL - ORD
1 stop14h 40mKLM
Sat 8/304:15 pmORD - OSL
1 stop15h 15mKLM
Deal found 7/31$606

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 July 31, 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

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Fri 8/15

7:50 am-6:30 pm

2 stops17h 40m

Lambert-St Louis

Tue 8/19

8:01 pm-11:25 pm

2 stops20h 24m

$451

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Sat 8/23

6:30 am-6:37 pm

2 stops19h 07m

Chicago Midway

Mon 9/15

6:15 pm-4:40 pm

2 stops15h 25m

$474

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sat 9/13

6:00 am-5:30 pm

2 stops18h 30m

Chicago O'Hare Intl

Sat 9/20

1:00 pm-11:05 am

2 stops15h 05m

$501

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sat 8/23

5:40 am-12:50 pm

1 stop14h 10m

Chicago O'Hare Intl

Mon 9/15

2:00 pm-2:10 pm

2 stops17h 10m

$503

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sun 9/14

2:55 pm-6:25 pm

2 stops34h 30m

Chicago O'Hare Intl

Sun 9/21

9:25 pm-2:10 pm

2 stops57h 45m

$506

OsloChicago

TRF - ORD

TRFORD

Oslo Sandefjord

Thu 12/4

2:35 pm-4:45 pm

1 stop33h 10m

Chicago O'Hare Intl

Mon 12/8

7:00 am-2:05 pm

2 stops24h 05m

$507

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Wed 10/1

6:45 am-7:58 pm

2 stops20h 13m

Chicago O'Hare Intl

Sat 10/4

10:30 pm-8:55 am

1 stop27h 25m

$514

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 9/25

6:45 am-3:04 pm

2 stops15h 19m

Chicago O'Hare Intl

Thu 10/9

3:50 pm-3:40 pm

2 stops16h 50m

$554

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sat 8/23

8:20 am-8:11 pm

2 stops18h 51m

Chicago O'Hare Intl

Mon 9/15

5:40 pm-11:30 pm

1 stop22h 50m

$565

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 9/1

6:05 pm-5:20 pm

2 stops30h 15m

Chicago O'Hare Intl

Sun 9/14

6:00 pm-5:15 pm

2 stops16h 15m

$568

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 41 results
1
2
3
...
5

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 July 31, 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 July 31, 2025.
Read reviews from past customers who have flown Delta, KLM, and LOT from Oslo to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
LOT
7.6
Good
1,105 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,316 reviews
Delta
8.0
Very good
7,981 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • 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 $374 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Lufthansa from $487 and Icelandair from $495 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, 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 Orlando flights
Oslo Gardermoen to Seattle flights
Oslo Gardermoen to Fort Lauderdale flights
Oslo Gardermoen to O'Hare Intl flights
Oslo Gardermoen to West Palm Beach flights
Oslo Gardermoen to Dulles Intl flights
Oslo Gardermoen to Detroit flights
Oslo Gardermoen to Los Angeles flights
Oslo Gardermoen to Baltimore flights
Oslo Gardermoen to Dallas/Fort Worth flights
Oslo Gardermoen to San Francisco flights
Oslo Gardermoen to Reagan-National flights
Sandefjord to Newark flights
Oslo Gardermoen to Honolulu flights
Oslo Gardermoen to Las Vegas flights
Sandefjord to Orlando flights
Oslo Gardermoen to Oakland flights
Oslo Gardermoen to San Jose flights
Sandefjord to Los Angeles flights
Oslo Gardermoen to Boston flights
Oslo Gardermoen to Stewart flights
Bergen to Newark flights
Bergen to John F Kennedy Intl flights
Sandefjord to Dulles Intl flights
Oslo Gardermoen to Hobby flights
Oslo Gardermoen to Portland flights
Sandefjord to Seattle flights
Sandefjord to San Francisco flights
Oslo Gardermoen to Tampa flights
Stavanger to John F Kennedy Intl flights
Bergen to Miami flights
Oslo Gardermoen to George Bush Intcntl flights
Oslo Gardermoen to San Diego flights
Stavanger to Newark 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.