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$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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$455
(Delta)

One-way from

$368
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$624
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. 15% potential increase in price ($91 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 June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/12. 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 9/116:30 amOSL - STL
2 stops21h 05mDelta
Mon 9/155:30 pmSTL - OSL
2 stops18h 20mDelta
Deal found 6/12$455
This Finnair deal was found by Cheapflights users on 6/10. 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.
Tue 7/157:25 pmOSL - ORD
1 stop23h 30mFinnair
Sun 7/209:30 pmORD - OSL
1 stop12h 05mFinnair
Deal found 6/10$478
This Delta deal was found by Cheapflights users on 6/12. 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 9/159:30 amMDW - OSL
2 stops16h 15mDelta
Deal found 6/12$479
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 8/146:35 amOSL - ORD
2 stops23h 55mUnited Airlines
Tue 8/266:00 pmORD - OSL
1 stop21h 10mUnited Airlines
Deal found 6/11$490
This Lufthansa deal was found by Cheapflights users on 6/12. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:45 pmOSL - STL
1 stop25h 45mLufthansa
Mon 9/155:30 pmSTL - OSL
2 stops17h 30mLufthansa
Deal found 6/12$530
This Gotogate deal was found by Cheapflights users on 6/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/142:55 pmTRF - ORD
1 stop32h 15mScandinavian Airlines
Mon 8/257:15 pmORD - TRF
1 stop12h 05mScandinavian Airlines
Deal found 6/11$534
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:15 amOSL - ORD
2 stops19h 06mLufthansa
Sat 1/310:35 pmORD - OSL
1 stop27h 10mLufthansa
Deal found 6/10$560
This AirNGo deal was found by Cheapflights users on 6/12. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/215:40 amOSL - ORD
1 stop13h 30mMultiple Airlines
Sun 8/39:40 pmORD - OSL
1 stop17h 30mMultiple Airlines
Deal found 6/12$569
This Gurufare deal was found by Cheapflights users on 6/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/157:25 pmOSL - ORD
1 stop25h 25mBritish Airways
Sun 7/209:15 pmORD - OSL
1 stop30h 10mBritish Airways
Deal found 6/11$572
This American Airlines deal was found by Cheapflights users on 6/10. 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 7/241:10 pmOSL - ORD
1 stop11h 40mAmerican Airlines
Thu 8/79:30 pmORD - OSL
1 stop12h 05mAmerican Airlines
Deal found 6/10$589
This Travelis deal was found by Cheapflights users on 6/10. 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.
Sat 8/26:15 pmOSL - ORD
1 stop28h 55mScandinavian Airlines
Sat 8/167:15 pmORD - OSL
1 stop31h 00mScandinavian Airlines
Deal found 6/10$606
This SWISS deal was found by Cheapflights users on 6/9. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/235:40 amOSL - ORD
2 stops42h 40mSWISS
Wed 7/302:20 pmORD - OSL
1 stop15h 45mSWISS
Deal found 6/9$622

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 June 12, 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

Thu 9/11

6:30 am-8:35 pm

2 stops21h 05m

Lambert-St Louis

Mon 9/15

5:30 pm-6:50 pm

2 stops18h 20m

$455

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 7/15

7:25 pm-11:55 am

1 stop23h 30m

Chicago O'Hare Intl

Sun 7/20

9:30 pm-4:35 pm

1 stop12h 05m

$478

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Sat 8/23

6:30 am-6:37 pm

2 stops19h 07m

Chicago Midway

Mon 9/15

9:30 am-8:45 am

2 stops16h 15m

$479

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 8/14

6:35 am-11:30 pm

2 stops23h 55m

Chicago O'Hare Intl

Tue 8/26

6:00 pm-10:10 pm

1 stop21h 10m

$490

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Thu 9/11

6:45 pm-1:30 pm

1 stop25h 45m

Lambert-St Louis

Mon 9/15

5:30 pm-6:00 pm

2 stops17h 30m

$530

OsloChicago

TRF - ORD

TRFORD

Oslo Sandefjord

Thu 8/14

2:55 pm-4:10 pm

1 stop32h 15m

Chicago O'Hare Intl

Mon 8/25

7:15 pm-2:20 pm

1 stop12h 05m

$534

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 7/21

5:40 am-12:10 pm

1 stop13h 30m

Chicago O'Hare Intl

Sun 8/3

9:40 pm-10:10 pm

1 stop17h 30m

$569

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 7/15

7:25 pm-1:50 pm

1 stop25h 25m

Chicago O'Hare Intl

Sun 7/20

9:15 pm-10:25 am

1 stop30h 10m

$572

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 7/24

1:10 pm-5:50 pm

1 stop11h 40m

Chicago O'Hare Intl

Thu 8/7

9:30 pm-4:35 pm

1 stop12h 05m

$589

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sat 8/2

6:15 pm-4:10 pm

1 stop28h 55m

Chicago O'Hare Intl

Sat 8/16

7:15 pm-9:15 am

1 stop31h 00m

$606

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 43 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, 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 June 12, 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.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Delta, KLM and LOT from Oslo to Illinois by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LOT
7.6
Good
1,077 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $482 on Scandinavian Airlines. Other airlines that offer cheap prices include Icelandair from $492 and LOT from $497 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

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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.
Oslo Gardermoen to Newark flights
Oslo Gardermoen to LaGuardia flights
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Sandefjord to John F Kennedy Intl flights
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Oslo Gardermoen to Boston flights
Sandefjord to Dulles Intl flights
Sandefjord to Newark flights
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Sandefjord to Los Angeles flights
Sandefjord to San Francisco flights
Bergen to John F Kennedy Intl flights
Bergen to Newark flights
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Sandefjord to Boston flights
Sandefjord to Seattle flights
Sandefjord to Orlando flights
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Sandefjord to Las Vegas flights
Bergen to San Francisco flights
Stavanger to John F Kennedy Intl flights
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Stavanger to Newark flights
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$563Average$745FlexibilityNo cancel feeOn-time76%

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