$351 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 10/15. 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

Thu, Oct 29 - Mon, Nov 2
American Airlines Logo
11:45 am - 8:25 pm
OSL
-
ORD
14h 40m
1 stop
American Airlines Logo
6:49 pm - 10:40 pm
ORD
-
OSL
20h 51m
2 stops
$571American Airlines
Thu, Oct 29 - Mon, Nov 2
British Airways Logo
7:05 am - 7:45 pm
OSL
-
ORD
18h 40m
1 stop
British Airways Logo
3:16 pm - 4:00 pm
ORD
-
OSL
17h 44m
2 stops
$575British Airways
Wed, Oct 28 - Fri, Nov 6
Delta Logo
6:05 am - 4:40 pm
OSL
-
ORD
16h 35m
2 stops
Delta Logo
11:19 am - 1:50 pm
ORD
-
OSL
19h 31m
2 stops
$576Delta
Wed, Sep 23 - Mon, Sep 28
Delta Logo
6:30 am - 4:13 pm
OSL
-
ORD
16h 43m
2 stops
Delta Logo
1:55 pm - 1:45 pm
ORD
-
OSL
16h 50m
2 stops
$577Delta
Wed, Sep 23 - Mon, Sep 28
Delta Logo
6:30 am - 6:33 pm
OSL
-
MDW
19h 03m
2 stops
Delta Logo
1:19 pm - 1:45 pm
MDW
-
OSL
17h 26m
2 stops
$577Delta
Thu, Sep 3 - Tue, Sep 15
American Airlines Logo
7:45 am - 7:46 pm
OSL
-
ORD
19h 01m
2 stops
American Airlines Logo
6:57 pm - 4:25 pm
ORD
-
OSL
14h 28m
2 stops
$580American Airlines
Fri, Aug 28 - Thu, Sep 10
British Airways Logo
7:50 am - 9:16 pm
OSL
-
ORD
20h 26m
2 stops
British Airways Logo
1:35 pm - 4:20 pm
ORD
-
OSL
19h 45m
2 stops
$581British Airways
Fri, Aug 28 - Thu, Sep 10
British Airways Logo
7:50 am - 9:16 pm
OSL
-
ORD
20h 26m
2 stops
British Airways Logo
1:35 pm - 4:20 pm
ORD
-
OSL
19h 45m
2 stops
$582British Airways
Thu, Dec 3 - Mon, Dec 7
United Airlines Logo
6:15 am - 11:09 pm
OSL
-
STL
23h 54m
2 stops
United Airlines Logo
7:04 pm - 5:40 pm
STL
-
OSL
15h 36m
2 stops
$701United Airlines
Thu, Dec 3 - Mon, Dec 7
United Airlines Logo
6:15 am - 11:09 pm
OSL
-
STL
23h 54m
2 stops
United Airlines Logo
7:04 pm - 5:40 pm
STL
-
OSL
15h 36m
2 stops
$702United 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 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 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 $729 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 39% 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

$351
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 10% 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)