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$426+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
OSL — ORD
abr. 27 — may. 41
dom. 4/27
dom. 5/4
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 abril 22, 2025.

Round-trip from

$426
(Flightsearch)

Popular in

July

Cheapest in

November

Average price

$510
From Oslo to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($85 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 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 abril 22, 2025.

This Ticket deal was found by Cheapflights users on 4/22. 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.
jue. 5/227:45 amOSL - ORD
1 stop15h 10mBritish Airways
vie. 6/69:15 pmORD - OSL
1 stop18h 15mBritish Airways
Deal found 4/22$433
This American Airlines deal was found by Cheapflights users on 4/22. 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.
mié. 9/31:20 pmOSL - ORD
2 stops18h 39mAmerican Airlines
dom. 9/218:00 amORD - OSL
2 stops19h 35mAmerican Airlines
Deal found 4/22$450
This lastminute.com deal was found by Cheapflights users on 4/22. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/54:30 pmOSL - ORD
1 stop11h 45mIcelandair
vie. 9/1910:15 pmORD - OSL
1 stop10h 10mIcelandair
Deal found 4/22$451
This Scandinavian Airlines deal was found by Cheapflights users on 4/22. 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.
mié. 9/37:05 pmOSL - ORD
1 stop28h 05mScandinavian Airlines
lun. 9/227:15 pmORD - OSL
1 stop10h 40mScandinavian Airlines
Deal found 4/22$452
This Delta deal was found by Cheapflights users on 4/22. 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.
mié. 8/276:30 amOSL - ORD
1 stop15h 10mDelta
mar. 9/25:45 pmORD - OSL
2 stops15h 55mDelta
Deal found 4/22$456
This Delta deal was found by Cheapflights users on 4/22. 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.
mié. 8/276:30 amOSL - MDW
2 stops18h 58mDelta
mar. 9/25:59 pmMDW - OSL
2 stops15h 41mDelta
Deal found 4/22$461
This Flysmarter deal was found by Cheapflights users on 4/22. 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.
jue. 5/228:45 pmOSL - ORD
2 stops27h 15mMultiple Airlines
vie. 6/69:15 pmORD - OSL
1 stop18h 15mMultiple Airlines
Deal found 4/22$479
This Finnair deal was found by Cheapflights users on 4/22. 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.
sáb. 9/68:35 amOSL - ORD
2 stops34h 15mFinnair
lun. 9/224:56 pmORD - OSL
2 stops18h 44mFinnair
Deal found 4/22$498
This Lufthansa deal was found by Cheapflights users on 4/22. 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.
dom. 9/76:50 amOSL - ORD
1 stop20h 05mLufthansa
mié. 9/179:40 pmORD - OSL
1 stop13h 25mLufthansa
Deal found 4/22$499
This Air Canada deal was found by Cheapflights users on 4/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/26:45 amOSL - ORD
2 stops34h 06mAir Canada
dom. 9/211:05 pmORD - OSL
2 stops18h 40mAir Canada
Deal found 4/22$511
This Air France deal was found by Cheapflights users on 4/22. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/612:45 pmOSL - ORD
2 stops15h 19mAir France
sáb. 9/205:10 pmORD - OSL
1 stop16h 30mAir France
Deal found 4/22$548
This Ovago deal was found by Cheapflights users on 4/22. 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.
lun. 6/235:05 pmOSL - ORD
1 stop27h 45mIberia
dom. 7/69:15 pmORD - OSL
1 stop30h 10mIberia
Deal found 4/22$550

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 abril 22, 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

jue. 5/22

7:45 am-3:55 pm

1 stop15h 10m

Chicago O'Hare Intl

vie. 6/6

9:15 pm-10:30 pm

1 stop18h 15m

$433

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

mié. 9/3

1:20 pm-12:59 am

2 stops18h 39m

Chicago O'Hare Intl

dom. 9/21

8:00 am-10:35 am

2 stops19h 35m

$450

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

vie. 9/5

4:30 pm-9:15 pm

1 stop11h 45m

Chicago O'Hare Intl

vie. 9/19

10:15 pm-3:25 pm

1 stop10h 10m

$451

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

mié. 9/3

7:05 pm-4:10 pm

1 stop28h 05m

Chicago O'Hare Intl

lun. 9/22

7:15 pm-12:55 pm

1 stop10h 40m

$452

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

mié. 8/27

6:30 am-2:40 pm

1 stop15h 10m

Chicago O'Hare Intl

mar. 9/2

5:45 pm-4:40 pm

2 stops15h 55m

$456

OsloChicago

OSL - MDW

OSLMDW

Oslo Gardermoen

mié. 8/27

6:30 am-6:28 pm

2 stops18h 58m

Chicago Midway

mar. 9/2

5:59 pm-4:40 pm

2 stops15h 41m

$461

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

jue. 5/22

8:45 pm-5:00 pm

2 stops27h 15m

Chicago O'Hare Intl

vie. 6/6

9:15 pm-10:30 pm

1 stop18h 15m

$479

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

sáb. 9/6

8:35 am-11:50 am

2 stops34h 15m

Chicago O'Hare Intl

lun. 9/22

4:56 pm-6:40 pm

2 stops18h 44m

$498

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

dom. 9/7

6:50 am-7:55 pm

1 stop20h 05m

Chicago O'Hare Intl

mié. 9/17

9:40 pm-6:05 pm

1 stop13h 25m

$499

OsloChicago

OSL - ORD

OSLORD

Oslo Gardermoen

mar. 9/2

6:45 am-9:51 am

2 stops34h 06m

Chicago O'Hare Intl

dom. 9/21

1:05 pm-2:45 pm

2 stops18h 40m

$511

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 44 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 abril 22, 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 abril 22, 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
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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
KLM
7.8
Good
1,331 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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
1,272 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

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 $489 on LOT. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $499 and Lufthansa from $551 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 John F Kennedy Intl 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
Oslo Gardermoen to Seattle flights
Oslo Gardermoen to Minneapolis flights
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Oslo Gardermoen to Orlando flights
Sandefjord to Seattle flights
Sandefjord to San Francisco flights
Oslo Gardermoen to Nashville flights
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Sandefjord to Newark flights
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Bergen to John F Kennedy Intl flights
Oslo Gardermoen to Reagan-National flights
Sandefjord to Orlando flights
Stavanger to John F Kennedy Intl flights
Sandefjord to Las Vegas flights
Bergen to Newark flights
Stavanger to Newark flights
Oslo Gardermoen to Tampa flights
Oslo Gardermoen to Salt Lake City flights
Oslo Gardermoen to George Bush Intcntl flights
Sandefjord to Boston flights

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 abril 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$416Average$512FlexibilityNo cancel feeOn-time70%

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