$227 Find Cheap Flights from Oslo to Illinois - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals
Booking Insights

KAYAK's insights & trends for Oslo to Illinois flights

Get data-powered insights and trends into flights from Oslo to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Oslo Gardermoen Airport to Illinois?

Flight prices are below average for this route right now.

Flights to Illinois from Oslo Gardermoen Airport usually cost between $585 and $806 in October.
The lowest price found in the past 5 days was $371 on Scandinavian Airlines (Oct 15-Oct 28).

What is the cheapest month to fly from Oslo Gardermoen Airport to Illinois?

The cheapest month for flights from Oslo Gardermoen Airport to Illinois is January, when tickets cost $477 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $738 and $731 respectively.

How far in advance should I book a flight from Oslo Gardermoen Airport to Illinois?

To get a below average price on the flight from Oslo Gardermoen Airport to Illinois, you should book around 9 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low season

January

Cheapest flight

$227
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 23% increase in price.
Flight from Oslo to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Oslo to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Oslo to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Oslo to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Oslo to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Oslo to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Oslo to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Oslo to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Oslo to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Oslo to Illinois

 
Need help choosing which airline to fly with from Oslo to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
Scandinavian AirlinesOverall score based on 1963 reviews
8.0Crew
6.8Food
6.8Entertainment
7.7Boarding
7.3Comfort
Airline reviews

A short two hour flight, no food, but good assortment of drinks. The seats are a bit

10.0 ExcellentDavid, Aug 2026
Read more Scandinavian Airlines reviews

A short two hour flight, no food, but good assortment of drinks. The seats are a bit

Flight was cancelled without notice or any reason given. I found out coincidentally when i was checking the baggage allowance on the app, When contacting the airline, the only option peresented to us meant we lost a day of our weekend getaway. Had a lot of contact with airline prior to flight, trying to get them to resolve the issue. We could have traveled the first stretch ourselves but the airline refused to accommodate this. The airline outright refused to be forthcoming in agreeing to alternatives that would let ut keep the date we had booked, and so a third of our holiday effectively vanished. This meant a lot of hassle, changing hotel nights, activities etc. Furthermore and after the flight, customer service refused to answer our complaint unless we used their very restrictive online form, which gave us no chance to properly explain what our issues were. They have of course denied our complaint, and so i have to bring the matter further. If you have an alternative airline to use, please do. SAS treats its customers as a necessary evil.

Yes avoid JFK airport at all costs. A horror to navigate.

My daughter always gets sick when we order the gluten free meal option. Internet didn’t work as advertised.

The flight was very cold, and the seats were rather uncomfortable. The food has been better on our other SAS experiences. Most significantly, the luggage with most of my wife's personal items and clothes didn't make the flight. Hoping for a quick resolution, but no real opportunity to speak with a Human has us concerned.

It was so hot on the plane. No air jets above the seats

SAS is very good at service, the lounge was great, and flights were on time. Boarding is fast and efficient!

Please see my comments for the flight from Chicago to Copenhagen

We were sitting in SAS plus. Super friendly, service that went above and beyond on a Full Flight too! Meals were deliscious and trays were cleared promptly. Generous drinks offered throughout the flight. Would like to suggest better movies on offer to watch.... In all genres and maybe more cooking shows? There was only 1, Nadia's Everyday Baking... Thank you

Food was underwhelming. One free coke, charged $$ for one wine. Last year one wine was included. And prices were much lower.

There were no places to sit at the gate. Most people had to sit on the floor or stand waiting for the gate to open and board. We were told we needed passport and the person hardly looked at them. Maybe for 2 seconds. No announcement made asking to board by row or group. On a 5.5 hour flight the crew only came through the cabin 2 times offering water and buy everything else. For the price of the ticket at least offer free soda! The airliner was very comfortable

You should offer more than 1 cup of water on a 2.5 hour flight.

Crew was wonderful. I knew going in that the seats were not lie-flat in business class, but they reclined less than I expected. To save on waste, you have to ask for which pieces of the amenity kit you are interested in, which they will gladly give to you. Flight was fairly short, so no issues. I did have one piece of luggage not show up at terminal on landing. They were great about looking for it. Found it...it actually did make the flight and was listed as "not picked up" (?????--we stayed over an hour looking for it, including in the odd-sized baggage claim.) Since "not picked up" they will not ship to my house and I have to go back to airport, which is in another town. I probably could have pressed this issue, but headed back to airport for another flight anyway, so will pick up then.

Just be careful, it is not business class, not flat seats, just as in comfort plus.

At least one soda free, felt like I was nickeled to death.

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

We had to be bussed to the plane. And it was raining. Not a pleasant experience.

The cost for the flight was quite reasonable and transferring to a new flight in Reykjavík went smoothly. There was enough time to grab a bite to eat at the airport, and the luggage transferred to the new flight with no problem.

I didn't have food nor entertainment. Lots of leg room and seat was comfortable

Everything you need to know for your flight from Oslo to Illinois

Information on your arrival and departure airports