$344 Find Cheap Flights from Oslo Airport to Illinois - Compare and Save

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 9/21. 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

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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

Sat, Oct 31 - Wed, Nov 4
British Airways Logo
7:10 am - 9:00 pm
OSL
-
ORD
19h 50m
2 stops
British Airways Logo
1:31 pm - 10:55 am
ORD
-
OSL
14h 24m
2 stops
$574British Airways
Fri, Aug 21 - Sun, Sep 6
Icelandair Logo
4:30 pm - 9:25 pm
OSL
-
ORD
11h 55m
1 stop
Icelandair Logo
7:25 pm - 3:25 pm
ORD
-
OSL
13h 00m
1 stop
$584Icelandair
Mon, Aug 31 - Tue, Sep 15
Scandinavian Airlines Logo
9:00 pm - 4:10 pm
OSL
-
ORD
26h 10m
1 stop
Scandinavian Airlines Logo
7:15 pm - 5:20 pm
ORD
-
OSL
15h 05m
1 stop
$590Scandinavian Airlines
Thu, Dec 24 - Sun, Jan 10
American Airlines Logo
7:05 am - 7:15 pm
OSL
-
ORD
19h 10m
1 stop
American Airlines Logo
1:31 pm - 10:35 am
ORD
-
OSL
14h 04m
2 stops
$592American Airlines
Fri, Dec 25 - Sun, Jan 10
Scandinavian Airlines Logo
9:05 pm - 4:45 pm
OSL
-
ORD
26h 40m
1 stop
Scandinavian Airlines Logo
7:15 pm - 1:10 pm
ORD
-
OSL
10h 55m
1 stop
$593Scandinavian Airlines
Sat, Aug 22 - Sun, Sep 6
Lufthansa Logo
6:15 am - 2:55 pm
OSL
-
ORD
15h 40m
1 stop
Lufthansa Logo
10:30 pm - 12:05 am
ORD
-
OSL
18h 35m
1 stop
$598Lufthansa
Fri, Aug 21 - Sun, Sep 6
Scandinavian Airlines Logo
11:55 am - 4:10 pm
OSL
-
ORD
11h 15m
1 stop
Scandinavian Airlines Logo
7:15 pm - 6:10 pm
ORD
-
OSL
15h 55m
1 stop
$601Scandinavian Airlines
Sun, Dec 27 - Sun, Jan 10
Scandinavian Airlines Logo
6:30 am - 4:45 pm
OSL
-
ORD
17h 15m
1 stop
Scandinavian Airlines Logo
7:15 pm - 1:10 pm
ORD
-
OSL
10h 55m
1 stop
$607Scandinavian Airlines
Fri, Aug 21 - Sun, Sep 6
Finnair Logo
12:50 pm - 12:30 pm
OSL
-
ORD
30h 40m
2 stops
Finnair Logo
9:30 pm - 7:45 pm
ORD
-
OSL
15h 15m
1 stop
$610Finnair
Mon, Aug 24 - Tue, Sep 8
Iberia Logo
3:00 pm - 2:25 pm
OSL
-
ORD
30h 25m
1 stop
Iberia Logo
9:30 pm - 12:05 pm
ORD
-
OSL
31h 35m
1 stop
$614Iberia
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 October.

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 $509 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 46% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$344
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.

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

Information on your arrival and departure airports

Oslo Airport (OSL)