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$430+ Cheap flights from Oslo to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 2, 2025.

Round-trip from

$430
(Delta)

Popular in

July

Cheapest in

November

Average price

$514
From Oslo to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 2, 2025.

This Delta deal was found by Cheapflights users on 4/1. 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.
Sun 5/259:20 amOSL - ORD
1 stop11h 50mDelta
Mon 6/28:12 pmORD - OSL
2 stops15h 38mDelta
Deal found 4/1$430
This Finnair deal was found by Cheapflights users on 4/1. 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.
Mon 4/218:35 amOSL - ORD
1 stop16h 15mFinnair
Wed 5/710:25 pmORD - OSL
1 stop18h 05mFinnair
Deal found 4/1$439
This Delta deal was found by Cheapflights users on 4/1. 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 4/216:30 amOSL - MDW
2 stops18h 50mDelta
Wed 5/76:25 pmMDW - OSL
2 stops15h 15mDelta
Deal found 4/1$440
This Ovago deal was found by Cheapflights users on 4/1. 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.
Sun 5/258:35 amOSL - ORD
1 stop16h 15mMultiple Airlines
Mon 6/28:30 pmORD - OSL
1 stop31h 05mMultiple Airlines
Deal found 4/1$494
This Cheapflightsfares deal was found by Cheapflights users on 4/1. 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.
Tue 6/247:45 amOSL - ORD
1 stop15h 10mBritish Airways
Sun 7/209:15 pmORD - OSL
1 stop19h 25mBritish Airways
Deal found 4/1$499
This Ticket deal was found by Cheapflights users on 4/1. 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 5/167:50 amOSL - STL
2 stops23h 01mBritish Airways
Fri 5/234:15 pmSTL - OSL
2 stops20h 50mBritish Airways
Deal found 4/1$531
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/86:00 amOSL - ORD
1 stop17h 10mScandinavian Airlines
Sun 8/317:15 pmORD - OSL
1 stop17h 00mScandinavian Airlines
Deal found 4/1$540
This Brussels Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 8/86:05 pmOSL - ORD
2 stops24h 20mBrussels Airlines
Sun 8/315:55 pmORD - OSL
1 stop21h 55mBrussels Airlines
Deal found 4/1$562
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 8/86:35 amOSL - ORD
2 stops34h 04mUnited Airlines
Sun 8/3110:43 amORD - OSL
2 stops15h 17mUnited Airlines
Deal found 4/1$564
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 5/166:35 amOSL - STL
1 stop13h 55mUnited Airlines
Fri 5/231:00 pmSTL - OSL
2 stops22h 05mUnited Airlines
Deal found 4/1$588
This Lufthansa deal was found by Cheapflights users on 4/1. 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 8/96:55 pmOSL - ORD
2 stops26h 15mLufthansa
Sat 8/3010:30 pmORD - OSL
1 stop18h 20mLufthansa
Deal found 4/1$611
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/95:25 pmTRF - ORD
1 stop29h 45mScandinavian Airlines
Sat 8/307:15 pmORD - TRF
1 stop12h 05mScandinavian Airlines
Deal found 4/1$624

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 2, 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

Sun 5/25

9:20 am-2:10 pm

1 stop11h 50m

Chicago O'Hare Intl

Mon 6/2

8:12 pm-6:50 pm

2 stops15h 38m

$430

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Mon 4/21

8:35 am-5:50 pm

1 stop16h 15m

Chicago O'Hare Intl

Wed 5/7

10:25 pm-11:30 pm

1 stop18h 05m

$439

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

Mon 4/21

6:30 am-6:20 pm

2 stops18h 50m

Chicago Midway

Wed 5/7

6:25 pm-4:40 pm

2 stops15h 15m

$440

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Sun 5/25

8:35 am-5:50 pm

1 stop16h 15m

Chicago O'Hare Intl

Mon 6/2

8:30 pm-10:35 am

1 stop31h 05m

$494

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Tue 6/24

7:45 am-3:55 pm

1 stop15h 10m

Chicago O'Hare Intl

Sun 7/20

9:15 pm-11:40 pm

1 stop19h 25m

$499

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Fri 5/16

7:50 am-11:51 pm

2 stops23h 01m

Lambert-St Louis

Fri 5/23

4:15 pm-8:05 pm

2 stops20h 50m

$531

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 8/8

6:00 am-4:10 pm

1 stop17h 10m

Chicago O'Hare Intl

Sun 8/31

7:15 pm-7:15 pm

1 stop17h 00m

$540

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 8/8

6:05 pm-11:25 am

2 stops24h 20m

Chicago O'Hare Intl

Sun 8/31

5:55 pm-10:50 pm

1 stop21h 55m

$562

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

Fri 8/8

6:35 am-9:39 am

2 stops34h 04m

Chicago O'Hare Intl

Sun 8/31

10:43 am-9:00 am

2 stops15h 17m

$564

OsloSt. Louis

OSL - STL

OSLSTL

Oslo Gardermoen

Fri 5/16

6:35 am-1:30 pm

1 stop13h 55m

Lambert-St Louis

Fri 5/23

1:00 pm-6:05 pm

2 stops22h 05m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 39 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 $323). 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 2, 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 2, 2025.
Get a feel of what it's like to fly with Delta, LOT and Finnair 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
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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
1,065 reviews
Delta
8.0
Very good
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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
1,267 reviews
Delta
8.0
Very good
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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
Air France
7.4
Good
1,425 reviews
Delta
8.0
Very good
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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
United Airlines
7.4
Good
8,615 reviews
Delta
8.0
Very good
7,898 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

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 $451 on TAP AIR PORTUGAL. Other airlines that offer cheap prices include LOT from $484 and Lufthansa from $552 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 $323). 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 John F Kennedy Intl flights
Oslo Gardermoen to Newark flights
Oslo Gardermoen to Stewart flights
Oslo Gardermoen to Fort Lauderdale flights
Oslo Gardermoen to LaGuardia flights
Sandefjord to John F Kennedy Intl flights
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Oslo Gardermoen to Los Angeles flights
Oslo Gardermoen to Miami flights
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Sandefjord to Los Angeles flights
Oslo Gardermoen to Dallas/Fort Worth flights
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Oslo Gardermoen to San Francisco flights
Oslo Gardermoen to Minneapolis flights
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Oslo Gardermoen to Reagan-National flights
Stavanger to John F Kennedy Intl flights
Oslo Gardermoen to Las Vegas flights
Oslo Gardermoen to Oakland flights
Stavanger to Newark flights
Oslo Gardermoen to Nashville flights
Sandefjord to San Francisco flights
Oslo Gardermoen to Honolulu flights
Bergen to Newark flights
Sandefjord to Newark flights
Oslo Gardermoen to Dulles Intl flights
Sandefjord to Boston flights
Oslo Gardermoen to San Jose flights
Sandefjord to Seattle flights
Bergen to John F Kennedy Intl flights
Oslo Gardermoen to Baltimore flights
Oslo Gardermoen to Portland flights
Sandefjord to Orlando flights
Oslo Gardermoen to Hobby flights
Oslo Gardermoen to Denver flights
Oslo Gardermoen to Tampa flights
Trondheim to O'Hare Intl flights
Oslo Gardermoen to George Bush Intcntl flights
Bergen to Stewart flights
Oslo Gardermoen to Pensacola flights

Top 4 airlines flying from Oslo to Illinois

Discover the top 4 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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$416Average$512FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$462Average$573FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$463Average$664FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$507Average$659FlexibilityNo cancel feeOn-time76%

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