$123 Cheap Alaska Airlines flights Ontario (ONT) to Chicago (ORD)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Alaska Airlines return flights from $239 from ONT to ORD. Affordable one-way options from $123 are also on offer.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the cheapest months to get away to Chicago with Alaska Airlines. You could also find fantastic deals on one-way and round-trip tickets in February.

For cheap Alaska Airlines fares from Los Angeles - Ontario Intl. Airport (ONT) to O’Hare Intl. Airport (ORD), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall price. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct route from ONT to ORD with Alaska Airlines or any other carriers, check the “Nonstop” filter when searching for flights.

To find the earliest departure from ONT to ORD with Alaska Airlines, filter your results by “Morning” and “Early Morning.” Booking an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Alaska Airlines flights from Los Angeles - Ontario Intl. Airport (ONT) to Chicago touch down at O’Hare Intl. Airport (ORD). This is the main gateway here.

Alaska Airlines makes traveling from ONT to ORD more enjoyable with a rewarding loyalty program and an excellent in-flight experience. You could even start earning points with Mileage Plan. Don’t forget to join our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of booking, but your airline may charge you after that. For more information about modifying your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to make changes without additional charges, tick the “Changes included” and “No cancel fee” filters when planning your next break.