$361 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 9/26. 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, Sep 19 - Sat, Sep 26
Multiple Airlines Logo
6:30 am - 2:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
14h 45m1 stop Amsterdam Schiphol
Multiple Airlines Logo
5:10 pm - 11:45 amORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
11h 35m1 stop Paris Charles de Gaulle
$536Multiple Airlines
Sat, Sep 19 - Sat, Sep 26
Air France Logo
6:30 am - 3:10 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
15h 40m1 stop Paris Charles de Gaulle
Air France Logo
5:10 pm - 11:45 amORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
11h 35m1 stop Paris Charles de Gaulle
$537Air France
Wed, Sep 2 - Mon, Sep 21
Multiple Airlines Logo
6:30 am - 2:30 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
15h 00m1 stop Amsterdam Schiphol
Multiple Airlines Logo
5:10 pm - 4:40 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
16h 30m1 stop Paris Charles de Gaulle
$539Multiple Airlines
Thu, Sep 3 - Wed, Sep 16
Icelandair Logo
4:30 pm - 6:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
32h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
10:25 pm - 12:35 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
31h 10m1 stop Reykjavik Keflavik Intl
$543Icelandair
Thu, Sep 3 - Wed, Sep 16
Icelandair Logo
4:30 pm - 6:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
32h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
10:25 pm - 12:35 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
31h 10m1 stop Reykjavik Keflavik Intl
$545Icelandair
Sun, Oct 11 - Fri, Oct 16
Icelandair Logo
1:50 pm - 6:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
11h 25m1 stop Reykjavik Keflavik Intl
Icelandair Logo
10:25 pm - 3:25 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
10h 00m1 stop Reykjavik Keflavik Intl
$551Icelandair
Fri, Sep 4 - Tue, Sep 15
Icelandair Logo
4:30 pm - 6:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
32h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:25 pm - 12:35 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
10h 10m1 stop Reykjavik Keflavik Intl
$552Icelandair
Fri, Oct 9 - Fri, Oct 16
Icelandair Logo
4:30 pm - 6:15 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
32h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
10:25 pm - 3:25 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
10h 00m1 stop Reykjavik Keflavik Intl
$553Icelandair
Fri, Oct 9 - Thu, Oct 15
Scandinavian Airlines Logo
9:00 pm - 4:10 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
26h 10m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 2:05 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
11h 50m1 stop Kastrup Copenhagen
$587Scandinavian Airlines
Fri, Oct 9 - Thu, Oct 15
Scandinavian Airlines Logo
7:30 pm - 4:10 pmOSL  Oslo Gardermoen-ORD Chicago O'Hare Intl
27h 40m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
7:15 pm - 12:55 pmORD  Chicago O'Hare Intl-OSL Oslo Gardermoen
10h 40m1 stop Kastrup Copenhagen
$597Scandinavian Airlines
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 September.

Flight prices are below average for this route right now.

Flights to Illinois from Oslo Gardermoen Airport usually cost between $690 and $750 in September.
The lowest price found in the past 5 days was $536 on Multiple Airlines (Sep 19-Sep 26).

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 January, when tickets cost $463 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $733 and $731 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 6 weeks before departure, which saves you about 40% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Find deals

Good to know

Low season

January

Cheapest flight

$361
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 25% 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)