$169 Cheap Frontier Airlines flights Ontario (ONT) to Knoxville (TYS)

View $169 flight on Sun, Aug 10, 2025Opens in a new window

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$169 Cheap Frontier Airlines flights Ontario (ONT) to Knoxville (TYS)

Prices were available within the past 7 days and start at $169 for one-way flights and $315 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Oct 1 - Mon, Oct 20
ONT
Ontario
TYS
Knoxville
$315 Roundtrip, found 14 hours ago
$315
Roundtrip
found 14 hours ago
Select Frontier Airlines flight, departing Wed, Oct 1 from Ontario to Knoxville, returning Mon, Oct 20, priced at $315 found 14 hours ago
Flights from Ontario (ONT) to Knoxville (TYS)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
McGhee Tyson
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Popular airline
Delta
Distance
1897 mi

Frequently asked questions

How much is a Frontier Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to McGhee Tyson Airport (TYS)?
Landing cheap one-way Frontier Airlines flights from ONT to TYS from $169 on Expedia couldn't be simpler --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from $315 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.
What is the cheapest month to fly from ONT to TYS with Frontier Airlines?
Frontier Airlines flights to Knoxville are often cheaper in the quieter months of January and December. Whether you need a one-way or a return ticket, you could score a better deal then.
What is the cheapest time to book flights from Los Angeles - Ontario Intl. Airport (ONT) to McGhee Tyson Airport (TYS) with Frontier Airlines?
Look for cheap Frontier Airlines flights from Los Angeles - Ontario Intl. Airport (ONT) to McGhee Tyson Airport (TYS) 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 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.
Does Frontier Airlines fly nonstop from Los Angeles - Ontario Intl. Airport (ONT) to McGhee Tyson Airport (TYS)?
Click on our "Nonstop" filter when browsing for direct Frontier Airlines flights from ONT to TYS. It's also a great way to compare other carriers servicing the same nonstop route.
What is the earliest Frontier Airlines flight from ONT to TYS?
Browse Frontier Airlines's earliest flights from ONT to TYS by checking the "Morning" and "Early 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.
What airports does Frontier Airlines fly into in Knoxville?
McGhee Tyson Airport (TYS) is the primary Knoxville gateway for Frontier Airlines flights from Los Angeles - Ontario Intl. Airport (ONT).
Why fly with Frontier Airlines from ONT to TYS?
A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to leave from ONT to TYS with Frontier Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* on top of Frontier Airlines's loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to McGhee Tyson Airport (TYS)?
Changes are usually free within 24 hours of making a booking, but your airline may charge a fee after that. For further information about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to change your itinerary without being charged, check the "Changes included" or "No cancel fee" filter when planning your next trip.

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