$139 Cheap Delta flights Knoxville (TYS) to Ontario (ONT)

Landing cheap one-way Delta Air Lines flights from TYS to ONT from $139 on Expedia is a cinch — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares from $283 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.

Browse for one-way or return flights to Ontario in January or April. You could find a cheap fare with Delta Air Lines during these quieter months.

Start searching one to three months before your departure to get cheap fares on Delta Air Lines flights from McGhee Tyson Airport (TYS) 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 reduce 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.

Use our “Nonstop” filter when browsing for direct Delta Air Lines flights from TYS to ONT. It’s also a great way to compare other airlines servicing the same direct route.

Browse Delta Air Lines’s earliest flights from TYS to ONT by checking the “Early Morning” and “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.

Catch a Delta Air Lines flight from McGhee Tyson Airport (TYS) to Ontario, and you’ll likely land at Los Angeles - Ontario Intl. Airport (ONT). This is the airline’s primary hub here.

Delta Air Lines makes traveling from TYS to ONT enjoyable with an excellent in-flight experience and a rewarding loyalty program. You may even earn points with Delta SkyMiles. Don’t forget to join our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can reschedule or cancel your flight, although additional charges may apply if your booking was made over 24 hours ago. Prefer to keep your options open? Apply the “Changes included” and “No cancel fee” filters to find flights that won’t penalize you if you need to revise your plans. To modify your booking, visit “Trips,” select your flight and click on “Manage Booking” for more information.