$154 Cheap American Airlines flights Memphis (MEM) to Ontario (ONT)

Finding cheap one-way American Airlines flights from MEM to ONT from $154 on Expedia is simple — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $307 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.

Look for one-way or return flights to Ontario in January or April. You could find cheaper fares with American Airlines during these off-peak months.

Look for affordable American Airlines flights from Memphis Intl. Airport (MEM) to Los Angeles - Ontario Intl. Airport (ONT) one to three months ahead of your departure. 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 type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be 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 see if there’s a direct trip from MEM to ONT with American Airlines or another carrier, check the “Nonstop” box when browsing for flights.

Find American Airlines’s earliest flights from MEM to ONT by selecting our “Morning” and “Early Morning” filters. Not only will you get to where you’re going 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.

American Airlines flights from Memphis Intl. Airport (MEM) to Ontario touch down at Los Angeles - Ontario Intl. Airport (ONT). This is the main entry point to this city.

Changes are generally free within 24 hours of making a booking, but your airline may add a charge after that. For more information about altering your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to make changes without extra charges, apply the “Changes included” and “No cancel fee” filters when organizing your next escape.