$348 Find Cheap Flights from Oslo Airport to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Oslo Gardermoen to Illinois departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Oslo to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Oslo to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Oslo Gardermoen to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Oslo Gardermoen to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Oslo Gardermoen to Illinois

Tue, Aug 11 - Tue, Aug 18
American Airlines Logo
7:45 am - 7:46 pm
OSL
-
ORD
19h 01m
2 stops
American Airlines Logo
7:05 pm - 11:20 pm
ORD
-
OSL
21h 15m
1 stop
$587American Airlines
Thu, Dec 17 - Tue, Jan 12
American Airlines Logo
7:05 am - 6:53 pm
OSL
-
ORD
18h 48m
2 stops
American Airlines Logo
9:50 pm - 10:40 pm
ORD
-
OSL
17h 50m
1 stop
$595American Airlines
Tue, Aug 11 - Tue, Aug 18
Multiple Airlines Logo
7:45 am - 5:15 pm
OSL
-
ORD
16h 30m
1 stop
Multiple Airlines Logo
11:15 am - 10:40 am
ORD
-
OSL
16h 25m
2 stops
$597Multiple Airlines
Thu, Dec 17 - Tue, Jan 12
British Airways Logo
11:45 am - 11:59 pm
OSL
-
ORD
19h 14m
2 stops
British Airways Logo
1:31 pm - 10:55 am
ORD
-
OSL
14h 24m
2 stops
$598British Airways
Tue, Aug 11 - Tue, Aug 18
Multiple Airlines Logo
7:45 am - 4:58 pm
OSL
-
ORD
16h 13m
2 stops
Multiple Airlines Logo
12:40 pm - 10:40 am
ORD
-
OSL
15h 00m
2 stops
$603Multiple Airlines
Mon, Aug 24 - Sun, Sep 6
American Airlines Logo
7:45 am - 3:55 pm
OSL
-
ORD
15h 10m
1 stop
American Airlines Logo
9:15 pm - 11:40 pm
ORD
-
OSL
19h 25m
1 stop
$606American Airlines
Fri, Oct 9 - Mon, Oct 12
British Airways Logo
11:45 am - 9:05 am
OSL
-
ORD
28h 20m
2 stops
British Airways Logo
5:32 pm - 4:20 pm
ORD
-
OSL
15h 48m
2 stops
$617British Airways
Thu, Jul 23 - Mon, Aug 3
Iberia Logo
2:55 pm - 4:00 pm
OSL
-
ORD
32h 05m
1 stop
Iberia Logo
9:30 pm - 12:05 pm
ORD
-
OSL
31h 35m
1 stop
$629Iberia
Wed, Aug 12 - Wed, Aug 19
Lufthansa Logo
6:35 am - 10:59 pm
OSL
-
STL
23h 24m
2 stops
Lufthansa Logo
3:30 pm - 6:25 pm
STL
-
OSL
19h 55m
1 stop
$694Lufthansa
Wed, Aug 12 - Wed, Aug 19
Lufthansa Logo
6:35 am - 1:25 pm
OSL
-
STL
13h 50m
1 stop
Lufthansa Logo
3:30 pm - 12:15 pm
STL
-
OSL
13h 45m
1 stop
$726Lufthansa
Booking Insights

KAYAK's insights & trends for Oslo Gardermoen to Illinois flights

Get data-powered insights and trends into flights from Oslo Gardermoen 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?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Oslo Gardermoen Airport to Illinois departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Oslo Gardermoen Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Oslo Gardermoen Airport to Illinois is February, when tickets cost $304 (return) on average. On the other hand, the most expensive months are July and May, when the average cost of round-trip tickets is $494 and $410 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Oslo Gardermoen Airport to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Oslo Gardermoen Airport to Illinois, you should book around 4 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$348
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Oslo to Chicago

FAQs - booking Illinois flights

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Oslo Airport 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 Airport 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 Airport 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 Airport 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 Airport 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 3 airlines serving from Oslo Gardermoen to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Oslo to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Oslo Gardermoen 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 1859 reviews
7.7Boarding
6.7Entertainment
8.0Crew
6.7Food
7.3Comfort
Airline reviews

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.

2.0 Mediocrethorsteinn, Jun 2026
OSL - CPH
Read more Scandinavian Airlines reviews

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.

This was my first time flying SAS and used them for 4 flights. The crews, flight and communication was outstanding. I flew premium economy and was extremely impressed by their SAS lounges. I will 100% ise SAS again. Everyone was so pleasant!

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

Awful. The Iceland airport was a complete mess. Boarding was a chaotic, the seats were awful, there was a group of rowdy 20 something men in our row hooting and hollering, ordering alcoholic drink after drink. Yelling and laughing at the top of their lungs and the crew just went along with it. Passengers complained to the men, asking if they could keep it down (it was a night time flight so people wanted to sleep). They never listened crew continued to laugh with them, flirt with them and serve them more drinks. No free food or snacks, seats were horribly uncomfortable. Worst flight I've had in a long time

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

Friendly flight crew. Airplane (757) configured as a domestic flight (no lie-flat seats) & no advanced meal selection.

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

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Everything could have been better. What needed to be wrong with United went wrong

It was good. The seats in economy weren’t bad

Very good. Comfortable and I felt well taken care of from start to finish

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

I don’t understand how they charge as much as they do for such a poor experience

I wish the plane had pod seating for business class. I had a window seat (8K) and I had to climb over the person sitting on the aisle when I needed to get up. Also there is no partition between the seats for privacy when sleeping. The Asian airlines have much nicer business class seating. Their seats are wider for better comfort when sleeping.

I came out early, 4 hrs before departure. The flight was changed 4 or 5 times with few minutes between new and schedule time , then 30 minutes delay, then up to 2hrs 30min delay. When I arrived in Frankfurt, no one help us to lead to the custom service. After almost 1 hour asking around then we must line up for another hour to get overnight and rebooking the next flight. We must find out how to get to the hotel by us self. The shuttle bus driver in Germany was not nice, speak German to English speaking and we must predict what she / he tried to tell us. We got up earlier and tried to not coming late to the check in and immigration procedure (we were told by the helping center that the immigration used to be over crowded) then we came there it was almost empty, then we must stay in the airport for hours not necessary. We got the coupons at the airport for compensation for waiting for delay flight for NOK 75 ( as low as 6 Euros) It is not enough to buy food at the airport price and Norwegian cost of living... How to drink a cup of cappuccino for NOK 72 when the stomach was empty for food in 16 hrs (from dinner at 6 pm the day before to 16 pm the day after) At the hotel in Frankfurt, we were offered two options spaghetti with biff or vegan food and a drink for 18 Euro. Almost 60 passenger ate the same food and I was remembered once time in former Soviet Union in 80's I travelled with Aeroflot and the passenger were stranded in the hotel for next flight and we were also offered only one choice of dinner, if we were hunger we must pay 1$ for 1 egg and another 1$ for two loaf of bread and butter. I can't believe Germany is to poor and inferior service like former USSR in 1980 decade. My good remembering of Luft Hansa disappear and changed totally by this service I got this time.

At Muchin the service woman for Lufthansa at the Airport was really horrible.

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

Information on your arrival and departure airports