Cheap Flights to Northern Illinois , IL from CA $457

It's as easy as counting 1-2-3 with Expedia. Step 1: Enter your travel details and hit "Search." Next, check the "No change fee" box just under the "Flexible change policies" filter to the left of your screen. Step 3. Snag a cheap and flexible airfare to Northern Illinois.

Score a seat with any of these leading airlines and get set to explore the best of Northern Illinois:

• United Airlines - 12,916 flights to or near Northern Illinois each month, including 12,777 flights to O'Hare Intl. Airport (ORD) and 138 to Quad City Intl. Airport (MLI) per month.
• American Airlines - 9,292 flights to or near Northern Illinois each month, including 9,109 flights to O'Hare Intl. Airport (ORD) and 182 to Quad City Intl. Airport (MLI) per month.
• Delta - 1,083 flights to or near Northern Illinois each month, including 1,023 flights to O'Hare Intl. Airport (ORD) and 60 to Quad City Intl. Airport (MLI) per month.

Book well in advance, consider nearby airports, avoid school vacation time — there are plenty of ways! One more is to make the most of Expedia's "flexible dates" function. Find a Northern Illinois flight, then check out the prices for nearby dates. In the last seven days, the lowest price for a flight to Northern Illinois was CA $682.

One-way flights from Toronto (YYZ) sold for as low as CA $457 in the last seven days. During this time, the cost of a round-trip journey to Northern Illinois varied between CA $682 and CA $682. If you find a deal, book fast — these fares don't stick around for long.

Depending on which airline you fly with and your final Northern Illinois destination, you'll have a number of main airports to choose from. They include:

• O'Hare Intl. Airport (ORD) - 24,728 flights per month.
• Quad City Intl. Airport (MLI) - 421 flights per month.
• Williamson County Regional Airport (MWA) - 52 flights per month.

Fly out on a Tuesday to increase your chances of securing the cheapest fare to Northern Illinois. Mondays are usually the next most affordable day to take off. Saturday is generally the most expensive day to fly anywhere.

Fares to Northern Illinois varied from CA $682 to CA $682 in the last seven days. Usually, the sooner you book the better the deal.

• Bursting with energy and cultural allure, Quad Cities is the perfect base for your Northern Illinois escape. Take in prominent attractions like RiverCenter, hit up the shops or wine and dine your way around some of this destination's fabulous restaurants. The choice is yours!
• Quad Cities features a humid continental climate. But before you jet off, check out what the weather will be up to when you're there. Hot, cold, wet or dry, it's smart to come prepared!
• Be sure to make New York your next stop. It's approximately 1400 kilometres to the east of Quad Cities and where you'll find Ellis Island, one of the city's leading tourist sights.

Anytime's a good time to visit Rockford, Northern Illinois's top city, but May, June and July are when it's at its busiest. Summer kicks off June 51 kg the States and is a perfect time to go if you like the outdoors. Temperatures usually range from 16ºC to 26ºC during this season.

The top month to book budget flights to Northern Illinois is February. Bear in mind that in the USA, the most expensive time to book a ticket is the festive month of December.