$154 Cheap Delta flights Indianapolis (IND) to Ontario (ONT)

Scoring cheap one-way Delta Air Lines flights from IND to ONT from $154 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $307 for your next exciting vacation.**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 get away 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 Indianapolis Intl. Airport (IND) to Los Angeles - Ontario Intl. Airport (ONT), start searching one to three months before your planned 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 impact the overall cost. Sunday is usually the cheapest, 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.

Select our “Nonstop” filter when browsing for direct Delta Air Lines flights from IND to ONT. It’s also a great way to compare other carriers offering the same nonstop route.

Filter your results by “Early Morning” and “Morning” to browse the earliest flights from IND to ONT. Setting off early means flight 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.

Los Angeles - Ontario Intl. Airport (ONT) is the main Ontario hub for Delta Air Lines flights from Indianapolis Intl. Airport (IND).

Jetting off from IND to ONT with Delta Air Lines comes with a host of benefits, including an excellent in-flight experience and a rewarding loyalty program. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to redeem on select future travel purchases. That’s in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually cancel or reschedule your flight, although additional fees may apply if your booking was made more than 24 hours ago. Prefer to keep your options open? Make use of Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t penalize you if you need to revise your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.