$167 Cheap Delta flights Columbus (CMH) to Ontario (ONT)

Finding cheap one-way Delta Air Lines flights from CMH to ONT from $167 on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $297 for your next break.**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 least expensive months to jet off to Ontario with Delta Air Lines. You could also find great deals on return and one-way tickets in April.

To find cheap Delta Air Lines fares from John Glenn Columbus Intl. Airport (CMH) to Los Angeles - Ontario Intl. Airport (ONT), start searching one to three months before your intended departure. Securing 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 affect the overall price. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight 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.

Use our “Nonstop” filter when browsing for direct Delta Air Lines flights from CMH to ONT. It’s also a great way to compare other airlines offering the same direct trip.

Browse Delta Air Lines’s earliest flights from CMH to ONT by checking the “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**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 John Glenn Columbus Intl. Airport (CMH) to Ontario touch down at Los Angeles - Ontario Intl. Airport (ONT). This is the main entry point here.

With an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a popular option for many passengers heading from CMH to ONT. What’s more, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your fare type, a fee typically applies if you cancel or reschedule your booking more than 24 hours after it has been confirmed. To secure tickets with more flexibility, select our “No cancel fee” or “Changes included” filter while looking for flights. For more details on changing or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”