$294 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 8/30. 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

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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Flights Deals

Best Illinois Flight Deals from Oslo Gardermoen

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
St. Louis
St. Louis2 stops$526
St. Louis
St. Louis2 stops$526

Cheap Flights from Oslo Gardermoen to Illinois

 
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

jue., sep. 4 - jue., sep. 18
Icelandair Logo
4:30 pm - 9:15 pmOSL-ORD
11h 45m1 stop
Icelandair Logo
7:25 pm - 12:35 pmORD-OSL
10h 10m1 stop
$393Icelandair
Find Deal
vie., ago. 22 - jue., sep. 4
TAP AIR PORTUGAL Logo
6:50 pm - 4:30 pmOSL-ORD
28h 40m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 5:50 pmORD-OSL
16h 50m1 stop
$413TAP AIR PORTUGAL
Find Deal
sáb., ago. 23 - lun., sep. 15
 Logo
7:15 pm - 2:10 pmOSL-ORD
25h 55m1 stop
 Logo
5:10 pm - 4:40 pmORD-OSL
16h 30m1 stop
sáb., ago. 23 - lun., sep. 15
KLM Logo
7:15 pm - 2:10 pmOSL-ORD
25h 55m1 stop
KLM Logo
4:40 pm - 8:45 amORD-OSL
33h 05m1 stop
$469KLM
Find Deal
jue., dic. 4 - lun., dic. 8
American Airlines Logo
7:00 am - 5:00 pmOSL-ORD
17h 00m1 stop
American Airlines Logo
11:45 am - 10:55 amORD-OSL
16h 10m2 stops
$473American Airlines
Find Deal
jue., dic. 4 - lun., dic. 8
American Airlines Logo
7:00 am - 8:04 pmOSL-ORD
20h 04m2 stops
American Airlines Logo
11:45 am - 10:55 amORD-OSL
16h 10m2 stops
$478American Airlines
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vie., ago. 22 - jue., sep. 4
 Logo
5:40 am - 12:50 pmOSL-ORD
14h 10m1 stop
 Logo
5:55 pm - 6:00 pmORD-OSL
17h 05m2 stops
sáb., ago. 23 - lun., sep. 15
British Airways Logo
8:20 am - 7:08 pmOSL-ORD
17h 48m2 stops
British Airways Logo
8:40 pm - 11:30 pmORD-OSL
19h 50m1 stop
$506British Airways
Find Deal
sáb., ago. 23 - lun., sep. 15
British Airways Logo
8:20 am - 5:32 pmOSL-ORD
16h 12m2 stops
British Airways Logo
5:40 pm - 4:35 pmORD-OSL
15h 55m2 stops
$538British Airways
Find Deal
lun., jul. 28 - mar., ago. 12
KLM Logo
6:30 am - 2:10 pmOSL-ORD
14h 40m1 stop
KLM Logo
4:15 pm - 6:35 pmORD-OSL
19h 20m1 stop
$597KLM
Find Deal
Useful Info

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?

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 November, when tickets cost $397 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $664 and $628 respectively.

What’s the cheapest day of the week to fly from Oslo Airport to Illinois?

The average price of all round-trip flights from Oslo Gardermoen Airport to Illinois clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Oslo Airport to Illinois, look for departures on Thursdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Illinois, Tuesday is the cheapest day to fly and Saturday is the most expensive.

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 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.


Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$294
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 35% 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.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $491 on average. Morning departures are around 26% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the evening, which is peak travel time and where the average cost of a ticket is $662.

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.
7.3
Scandinavian AirlinesOverall score based on 1421 reviews
7.9Crew
7.2Comfort
6.6Food
6.6Entertainment
7.6Boarding
Airline reviews

I paid for the seat with more leg room but on the day of my departure my seat was changed. I brought it to the airline costumer service and he was able to change it back. The person sitting next to me had the same exact issue.

8.0 ExcellentAnonymous, Jul 2025EWR - ARN
Read more Scandinavian Airlines reviews

I paid for the seat with more leg room but on the day of my departure my seat was changed. I brought it to the airline costumer service and he was able to change it back. The person sitting next to me had the same exact issue.

Food could have been better. My pasta was microwaved into a solid block. Inedible.

OK experience except for the fact that I had to pay $100 for one checked in bag in Amsterdam, while it was supposed to be free like it was on the flight from LAX to AMS. I want SAS to reimburse me for this!

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

No TV screen, free WiFi or power outlets, but seats were comfortable, food and drinks were great, service was awesome!

Very difficult to clearly hear the dialogue on videos due to airplane engine sound. Flying to Copenhagen audio was very clear. Food was excellent. Returning flight--Lunch and breakfast food was the worst I've experienced. Audio was terrible. Why the difference?

You changed our seats without letting us know. We booked two seats on the side of the plane including an aisle, but you ended up putting us in between two other people in the middle of the plane. My husband is 6' 6" and I'm 5' 11", so we need an aisle seat. We were able to move thankfully because the flight wasn't full, but I had to ask the stewardess. You also didn't give us a meal for several hours on the return flight, and it wasn't great (toast with olive/cheese). Finally, you lost our checked bags in Copenhagen so we had to wait an hour after we arrived before we realized they weren't coming. We put in a claim so hopefully we'll still get them.

The check in not ok! Demanding that we check our carry ons on check in! When there was plenty of available space inside the plane! And the staff at check- in was rude and not helpful and I was traveling with my autistic son and his service dog! Boarding was easy since we were priority boarding! The crew was ok expect from one guy flight attendant that was actually great!

Standard short hop flight. No food, no entertainment. Just get in, get something to drink, and try to be as comfortable as you can for an hour.

Travelling coach, comfort is all in one's perspective. Movie choices were great. Food was OK. Flight crew were pleasant. Tip: If they come through asking if you want tea or coffee, do not ask for water. They get miffed. So use the call button after they pass through.

The plane was very small and the aisle was so narrow that every time someone walked by they rubbed against me, so it was very uncomfortable.

Everything was good. Only issue comes from being vegan and flying. The food options are super limited.

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..

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

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

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

The flights were in time and the bags arrived. well done

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

The crew were good. The flight was on time. The entertainment choice was ok. But the food was bad, tasted and texture were awful.

After boarding we were waiting in the plane for more than one hour to take off without AC with very high temperature inside

The flight was an hour late leaving Heathrow. The food was mediocre. When we got to Austin, my husband’s luggage was missing. He filled out information at baggage claim. We are waiting to hear something. His name is Henry Jacob Braunig.

The food was very good and it came multiple times

Flight from LGW to JFK delayed by 4 hrs No explanation given until the pilot said the delay due to planned maintenance on the aircraft

We arrived late to London, and consequently were 5 min. late to be allowed through security for our next flight. Even though dozens of people missed the same flight, BA did not radio ahead to hold open security for an extra 5-10 min. to allow people to get on the flight. This caused an additional 6 hour delay in London after waiting over an hour in Customer Service to get rebooked. They did not have enough staff on hand to help people in a timely manner. Not at all happy with the BA's customer care or customer service.

All service prior to the flight was terrible: online check-in not working, no customer service tel,, multiple airport scanners not working, A huge mess.

CONSTANT ERROR MESSAGE THAT THE WIFI COULD NOT BE PURCHASED DUE TO INABILITY TO CONNECT PAYMENT SYSTEM VIA SATELLITE. THIS HAPPENED IN BOTH DIRECTIONS. THE MAIN REASON I TRAVEL IN PRIORITY IS TO BE ABLE TO WORK FOR WHICH I NEED ACCESS TO INTERNET. .

They lost my luggage. Lady who was helping with it in Austin was rude. Not very helpful!

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

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