$157 Cheap Delta flights Grand Rapids (GRR) to Ontario (ONT)

Finding cheap one-way Delta Air Lines flights from GRR to ONT from $157 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $313 for your next adventure.**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.

Search for round-trip or one-way flights to Ontario in January or April. You could find lower fares with Delta Air Lines during these off-peak times.

Begin your search one to three months ahead of your departure date to score cheap fares on Delta Air Lines flights from Gerald R. Ford Intl. Airport (GRR) to Los Angeles - Ontario Intl. Airport (ONT). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*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.

Simply enter your dates, click search and check the “Nonstop” filter on Expedia to browse any direct flights from GRR to ONT with Delta Air Lines or other carriers.

Find Delta Air Lines’s earliest flights from GRR to ONT by using the “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being 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 Gerald R. Ford Intl. Airport (GRR) to Ontario come in to land at Los Angeles - Ontario Intl. Airport (ONT). This is the main entry point to this destination.

With an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a top choice for many travelers flying from GRR 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 can be used on future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually modify or cancel your flight, although there may be additional charges if you booked more than 24 hours ago. Need to keep your options open? Make use of our “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you need to revise your plans. To modify your itinerary, go to “Trips,” select your flight and click on “Manage Booking” for more information.