$117 Cheap Delta flights Boise (BOI) to Ontario (ONT)

Finding cheap one-way Delta Air Lines flights from BOI to ONT from $117 on Expedia is a breeze — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $233 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 cheapest months to travel to Ontario with Delta Air Lines. You could also find great deals on return and one-way tickets in April.

Look for cheap Delta Air Lines flights from Boise Airport (BOI) to Los Angeles - Ontario Intl. Airport (ONT) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 route from BOI to ONT with Delta Air Lines or other carriers, use our “Nonstop” filter when searching for tickets.

To find the earliest departure from BOI to ONT with Delta Air Lines, sort your results by “Early Morning” and “Morning.” Booking an early flight usually means 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 primary Ontario hub for Delta Air Lines flights from Boise Airport (BOI).

Delta Air Lines makes traveling from BOI to ONT more comfortable with an excellent in-flight experience and a rewarding loyalty program. You may even earn points with Delta SkyMiles. Be sure to sign up to our 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 often free within 24 hours of making a booking, but your airline may add a charge after that time. For further details about altering your reservation, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without extra charges, tick the “Changes included” and “No cancel fee” filters when organizing your trip.