$150 Cheap Delta flights Ontario (ONT) to Miami (MIA)

Landing cheap one-way Delta Air Lines flights from ONT to MIA from $150 on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $259 for your next getaway.**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.

Delta Air Lines flights to Miami tend to be cheaper in the off-peak months of September and October. Whether you’re in search of a one-way or a return ticket, you could find a better deal then.

For cheap Delta Air Lines fares from Los Angeles - Ontario Intl. Airport (ONT) to Miami Intl. Airport (MIA), 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 impact the overall cost. Sunday is typically 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.

Enter your dates, click search and tick the “Nonstop” filter on Expedia to find any direct flights from ONT to MIA with Delta Air Lines or other airlines.

Find Delta Air Lines’s earliest flights from ONT to MIA by using the “Early Morning” and “Morning” filters. Not only will you arrive 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.

Miami Intl. Airport (MIA) is the primary Miami hub for Delta Air Lines flights from Los Angeles - Ontario Intl. Airport (ONT).

Offering a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a popular option for many passengers heading from ONT to MIA. 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 can be put toward future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually change or cancel your flight, although there may be additional charges if your booking was made more than 24 hours ago. Need to keep your options open? Make use of Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t penalize you if you have to adjust your plans. To update your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.