$160 Cheap Delta flights Ontario (ONT) to Chicago (ORD)

You’ll find budget-friendly return Delta Air Lines flights from $278 from ONT to ORD by sorting your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $160 for a one-way journey.**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.

Browse for return or one-way flights to Chicago in January or February. You could find a cheap fare with Delta Air Lines during these off-peak travel months.

For cheap Delta Air Lines 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 influence the overall cost. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey 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 find out if there’s a direct trip from ONT to ORD with Delta Air Lines or another airline, select the “Nonstop” filter when searching for tickets.

To find the earliest departure from ONT to ORD with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Choosing an early flight usually means you’re less likely to experience cancellations.**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.

Delta Air Lines flights from Los Angeles - Ontario Intl. Airport (ONT) to Chicago come in to O’Hare Intl. Airport (ORD). This is the main gateway to this destination.

Delta Air Lines makes flying from ONT to ORD more enjoyable with a rewarding loyalty program and an excellent in-flight experience. You even have the chance to collect points with Delta SkyMiles. Be sure to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of booking, but your airline may add a charge after that time. For further details about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to make changes without additional costs, check the “No cancel fee” or “Changes included” filter when organizing your next escape.