$114 Cheap Frontier Airlines flights Fargo (FAR) to Ontario (ONT)

Finding cheap one-way Frontier Airlines flights from FAR to ONT from $114 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Or check out our affordable round-trip fares from $218 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.

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

To find cheap Frontier Airlines fares from Hector Intl. Airport (FAR) to Los Angeles - Ontario Intl. Airport (ONT), start searching one to three months before your planned departure. Reserving 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 influence the overall price. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book 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.

Click on the “Nonstop” filter when searching for direct Frontier Airlines flights from FAR to ONT. It’s also a good way to compare other airlines servicing the same nonstop journey.

Sort your results by “Morning” and “Early Morning” to see the earliest departures from FAR to ONT. Taking off early means you’re 20% less likely to experience cancellations.**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.

Frontier Airlines flights from Hector Intl. Airport (FAR) to Ontario touch down at Los Angeles - Ontario Intl. Airport (ONT). This is the main entry point to this destination.

Offering a rewarding loyalty program, Frontier Airlines is a popular choice for many travelers flying from FAR to ONT. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to change or cancel your flight, although additional fees may apply if you booked more than 24 hours ago. Want to keep your options open? Use Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you have to revise your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for more information.