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$280+ 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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Round-trip from

$431
(Flightnetwork)

One-way from

$280
(Mytrip)

Popular in

July

Cheapest in

November

Average price

$510
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. 14% potential increase in price ($86 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 April 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 April 30, 2025.

This Flightnetwork deal was found by Cheapflights users on 4/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/121:50 pmOSL - ORD
1 stop11h 25mIcelandair
Tue 5/2710:15 pmORD - OSL
1 stop10h 10mIcelandair
Deal found 4/28$431
This Ticket deal was found by Cheapflights users on 4/28. 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.
Thu 5/1511:40 amOSL - ORD
1 stop12h 20mMultiple Airlines
Thu 5/294:44 pmORD - OSL
2 stops16h 51mMultiple Airlines
Deal found 4/28$444
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/269:20 amOSL - ORD
1 stop11h 50mDelta
Tue 9/25:45 pmORD - OSL
2 stops15h 55mDelta
Deal found 4/28$452
This British Airways deal was found by Cheapflights users on 4/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:50 amOSL - ORD
1 stop17h 25mBritish Airways
Fri 6/207:15 pmORD - OSL
1 stop20h 15mBritish Airways
Deal found 4/29$456
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/269:20 amOSL - MDW
2 stops16h 08mDelta
Tue 9/25:59 pmMDW - OSL
2 stops15h 41mDelta
Deal found 4/28$457
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:45 amOSL - ORD
1 stop15h 10mAmerican Airlines
Thu 5/2910:25 pmORD - OSL
1 stop18h 30mAmerican Airlines
Deal found 4/29$466
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1511:40 amOSL - ORD
1 stop12h 20mIberia
Thu 5/2910:25 pmORD - OSL
1 stop18h 30mIberia
Deal found 4/29$499
This Travelis deal was found by Cheapflights users on 4/29. 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 8/272:55 pmTRF - ORD
1 stop32h 15mScandinavian Airlines
Tue 9/27:15 pmORD - TRF
1 stop12h 05mScandinavian Airlines
Deal found 4/29$506
This Ovago deal was found by Cheapflights users on 4/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/245:20 pmOSL - ORD
2 stops25h 35mFinnair
Tue 7/89:15 pmORD - OSL
1 stop19h 10mFinnair
Deal found 4/27$514
This Expedia deal was found by Cheapflights users on 4/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:45 amOSL - ORD
1 stop12h 15mBrussels Airlines
Thu 5/296:05 pmORD - OSL
2 stops16h 10mBrussels Airlines
Deal found 4/29$526
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/196:35 amOSL - ORD
2 stops23h 55mUnited Airlines
Thu 7/2410:50 amORD - OSL
2 stops15h 10mUnited Airlines
Deal found 4/29$539
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/86:55 amOSL - ORD
1 stop16h 15mScandinavian Airlines
Sat 8/307:15 pmORD - OSL
1 stop14h 20mScandinavian Airlines
Deal found 4/29$548

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 April 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

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 5/12

1:50 pm-6:15 pm

1 stop11h 25m

Chicago O'Hare Intl

Tue 5/27

10:15 pm-3:25 pm

1 stop10h 10m

$431

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/15

11:40 am-5:00 pm

1 stop12h 20m

Chicago O'Hare Intl

Thu 5/29

4:44 pm-4:35 pm

2 stops16h 51m

$444

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 8/26

9:20 am-2:10 pm

1 stop11h 50m

Chicago O'Hare Intl

Tue 9/2

5:45 pm-4:40 pm

2 stops15h 55m

$452

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 6/13

7:50 am-6:15 pm

1 stop17h 25m

Chicago O'Hare Intl

Fri 6/20

7:15 pm-10:30 pm

1 stop20h 15m

$456

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Tue 8/26

9:20 am-6:28 pm

2 stops16h 08m

Chicago Midway

Tue 9/2

5:59 pm-4:40 pm

2 stops15h 41m

$457

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/15

7:45 am-3:55 pm

1 stop15h 10m

Chicago O'Hare Intl

Thu 5/29

10:25 pm-11:55 pm

1 stop18h 30m

$466

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/15

11:40 am-5:00 pm

1 stop12h 20m

Chicago O'Hare Intl

Thu 5/29

10:25 pm-11:55 pm

1 stop18h 30m

$499

OsloChicago

TRF - ORD

TRFORD

Oslo Sandefjord

Wed 8/27

2:55 pm-4:10 pm

1 stop32h 15m

Chicago O'Hare Intl

Tue 9/2

7:15 pm-2:20 pm

1 stop12h 05m

$506

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 6/24

5:20 pm-11:55 am

2 stops25h 35m

Chicago O'Hare Intl

Tue 7/8

9:15 pm-11:25 pm

1 stop19h 10m

$514

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Thu 5/15

6:45 am-12:00 pm

1 stop12h 15m

Chicago O'Hare Intl

Thu 5/29

6:05 pm-5:15 pm

2 stops16h 10m

$526

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 40 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 April 30, 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 April 30, 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
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
LOT
7.6
Good
1,069 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $440 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include Icelandair from $448 and LOT from $499 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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Sandefjord to Los Angeles flights
Oslo Gardermoen to Dallas/Fort Worth flights
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Sandefjord to Newark flights
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Sandefjord to San Francisco flights
Sandefjord to Seattle flights
Sandefjord to Dulles Intl flights
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Stavanger to Newark flights
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Top 2 airlines flying from Oslo to Illinois

Discover the top 2 airlines 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$416Average$512FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$507Average$745FlexibilityNo cancel feeOn-time76%

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