$311 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 2/28. 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

Sun, Jan 25 - Sat, Feb 7
Icelandair Logo
9:30 pm - 5:20 pm
OSL
-
ORD
26h 50m1 stop
Icelandair Logo
6:30 pm - 8:35 pm
ORD
-
OSL
19h 05m1 stop
$378Icelandair
Wed, Apr 15 - Sun, Apr 19
Icelandair Logo
1:50 pm - 6:15 pm
OSL
-
ORD
11h 25m1 stop
Icelandair Logo
10:40 pm - 12:35 pm
ORD
-
OSL
30h 55m1 stop
$395Icelandair
Sun, Jan 25 - Sat, Feb 7
British Airways Logo
11:30 am - 1:50 pm
OSL
-
ORD
33h 20m1 stop
British Airways Logo
11:39 am - 10:30 am
ORD
-
OSL
15h 51m2 stops
$433British Airways
Sun, Jan 25 - Sat, Feb 7
British Airways Logo
7:20 am - 5:42 pm
OSL
-
ORD
17h 22m2 stops
British Airways Logo
11:39 am - 10:30 am
ORD
-
OSL
15h 51m2 stops
$438British Airways
Thu, Feb 5 - Mon, Feb 9
Scandinavian Airlines Logo
9:05 pm - 4:45 pm
OSL
-
ORD
26h 40m1 stop
Scandinavian Airlines Logo
7:20 pm - 2:15 pm
ORD
-
OSL
11h 55m1 stop
$467Scandinavian Airlines
Thu, Feb 5 - Mon, Feb 9
Scandinavian Airlines Logo
9:05 pm - 4:45 pm
OSL
-
ORD
26h 40m1 stop
Scandinavian Airlines Logo
7:20 pm - 7:15 pm
ORD
-
OSL
16h 55m1 stop
$468Scandinavian Airlines
Wed, Apr 15 - Sun, Apr 19
Multiple Airlines Logo
11:35 am - 9:30 pm
OSL
-
ORD
16h 55m2 stops
Multiple Airlines Logo
10:35 pm - 11:40 pm
ORD
-
OSL
18h 05m1 stop
$478Multiple Airlines
Sun, Jan 25 - Sat, Feb 7
Multiple Airlines Logo
6:25 am - 3:10 pm
OSL
-
ORD
15h 45m1 stop
Multiple Airlines Logo
4:25 pm - 10:30 pm
ORD
-
OSL
23h 05m1 stop
$481Multiple Airlines
Sat, Jan 3 - Wed, Jan 7
Lufthansa Logo
4:35 pm - 1:55 pm
OSL
-
STL
28h 20m1 stop
Lufthansa Logo
6:40 pm - 5:40 pm
STL
-
OSL
16h 00m2 stops
$1,768Lufthansa
Sat, Jan 3 - Wed, Jan 7
Lufthansa Logo
1:50 pm - 1:55 pm
OSL
-
STL
31h 05m1 stop
Lufthansa Logo
3:50 pm - 3:20 pm
STL
-
OSL
16h 30m1 stop
$2,098Lufthansa
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 January.

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 September, when tickets cost $445 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $686 and $646 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 5 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$311
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 31% 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.
7.4
Scandinavian AirlinesOverall score based on 1611 reviews
7.6Boarding
6.7Food
8.0Crew
7.3Comfort
6.7Entertainment
Airline reviews

Feels like economy sits are getting smaller especially while eating food

10.0 ExcellentAnonymous, Dec 2025
CPH - EWR
Read more Scandinavian Airlines reviews

Feels like economy sits are getting smaller especially while eating food

I was surprised how good an American airline can be - I was really impressed.

Cut out the nickel and dime pricing for "seat selection" and baggage, To do this on an international flight is just mind boggling. Seriously, why treat customers this way??? Nobody wants these hidden extra fees and everybody hates them. Also plane was too warm and no air vent, and water dripped from the ceiling at one point,

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

Scandinavian was perfect. Nice A350 with an on time departure and an an experienced crew. What a difference from TAP.

The staff were great, the food was good. I just hate being crammed in a tuna can for 10 hours cause I can’t afford a better seat.

Really like this airline. Best food for airlines and comfortable seats and attentive staff. Delay was due to air traffic.

Great logistics and timeliness as we arrived quite early. Flight smooth and fast. Excellent entertainment. Plane itself was a bit tired and the crew mostly indifferent. Baggage took forever but that’s on CPH. Would use SAS again for sure.

Baggage was mis-handled; food and grocery items in the baggage were damaged.

It was a good flight. Everyone was professional and the flight was smooth.

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

It was too cold in the plane my feet froze

Service was excellent. Food and drinks were very good except for a greasy lump of a donut at the end of the flight that left us both feeling internally disgusted.

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

No meals included on this long international flight. Most airlines will offer you a meal when flying internationally. Not Icelandair. Your included choices are water and coffee. Poor customer service. The airport was also very confusing.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Food was poor quality and the screens for entertainment didn’t work properly

It was a short flight, everything was good with it.

I darted through the Frankfurt airport to make my connecting flight. I asked if it was a possibility to upgrade and the agent did. This was the kindest gesture and it made up for the previous delayed flight and distress/anxiety of anticipating that Zi was going to miss my Frankfurt-Chicago connection. I cannot express my gratitude for the upgrade.. I am 5feet 10 inches do the leg space was amazing.

I meant this flight was not good, the one from Tirana to Frankfurt was better!

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

The crew was the best I’ve ever encountered. Business class was spacious, immaculate, and very modern.

I wish seats were not reclinable. It's so claustrophobic when the person in front of you spends most of a nine hour flight leaned all the way back. The crew was really nice though and the dinner (red Thai curry) was pretty compelling.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

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

Information on your arrival and departure airports