Cheap Flights to Southern Illinois , IL from CA $536

We get that travel arrangements can change in a flash, so reserving a flexible ticket with Expedia makes sense. Simply mark the "No change fee" box under the "Flexible change policies" filter. Your low-cost, flexible flight to Southern Illinois is just a few clicks away.

With a good range of airlines offering flights into or near Southern Illinois, you won't be short of options:

• Southwest Airlines - 2,907 flights to or near Southern Illinois each month, including 2,907 flights to Lambert-St. Louis Intl. Airport (STL) per month.
• American Airlines - 1,023 flights to or near Southern Illinois each month, including 810 flights to Lambert-St. Louis Intl. Airport (STL) per month.
• Delta - 602 flights to or near Southern Illinois each month, including 516 flights to Lambert-St. Louis Intl. Airport (STL) per month.

A helpful strategy for getting your hands on cheap tickets is to be flexible with your dates. Start by searching for your flight to Southern Illinois, then click on the "flexible dates" link for a list of prices for nearby days. Another helpful hint? Book well ahead of time. For an idea of fares, CA $929 was the best price for a flight to Southern Illinois in the last seven days.

You could have picked up a round-trip flight to Southern Illinois from anywhere between CA $929 and CA $929 in the last seven days. For one-way trips leaving from Toronto (YYZ), the lowest price during this period was just CA $536.

Land at any one of these major airports in Southern Illinois and you'll be perfectly placed to experience all that this renowned region has to offer:

• Lambert-St. Louis Intl. Airport (STL) - 5,094 flights per month.
• Evansville Regional Airport (EVV) - 325 flights per month.
• Williamson County Regional Airport (MWA) - 52 flights per month.

Consider jetting off early in the week to land a bargain airfare to Southern Illinois. Tuesday is usually the most cost-effective day to depart, with Monday running a close second. Saturday typically has the highest prices. This is because lots of travellers prefer to begin their break on a weekend.

In the last seven days, tickets to Southern Illinois fluctuated from CA $929 to CA $929.

• Get your vacation underway in the premier city of Alton and you'll have a seemingly endless list of attractions to enjoy. Argosy Casino is just the tip of the sightseeing iceberg. You'll want to soak up the buzzing nightlife, taste the local cuisine and shop up a storm while you're in town as well.
• If you're not sure what to pack beyond your credit card, passport and cellphone, check the local forecast. This will help you choose your travel wardrobe for the time of year you're staying in Alton, which has a humid subtropical climate.

If you like the lively energy of major cities, go to Belleville during April, May and June. This is a very popular time for one of Southern Illinois's much-loved destinations. Summer begins June 20 and brings average temperatures of between 19ºC and 29ºC. Time your getaway then and look forward to plenty of glorious sunny days.

The most cost-effective month to land a great deal to Southern Illinois is February, whereas prices are at their highest in December. Try to avoid this month if you're watching your pennies.