Flight Deals from Chicago to Calgary from $101

Fly from Chicago to Calgary when prices are lower in late October and avoid peak costs from late February to early April.

When planning your flight from Chicago to Calgary, you'll find that the highest prices typically occur from late February to early April, peaking around mid-March with costs reaching over $600. The low price period is mainly in late October, where prices can drop to around $250. Overall, the high season extends from late February to early June, while the low season spans late September to early November. Expect a significant price difference of nearly $400 between these seasons, making it crucial to book during the leaner months for savings.

Book your flight to Calgary at least 54 days before departure for the best prices; avoid waiting until 10 days prior to departure as prices increase sharply.

To ensure you secure the best deal for your flight from Chicago to Calgary, it's advisable to book approximately 54 days prior to your departure, when prices are typically around $339. Prices remain affordable if you purchase between 163-153 and 110-78 days out, but be wary if you wait until closer to your departure date, especially within 10 days, as prices can surge from $421 to $514. Waiting much longer can result in significantly higher costs, making it imperative to buy early to avoid overpaying.