$324 Cheap Flights from Ithaca (ITH) to Ontario (ONT)

View $324 flight on Wed, Nov 19, 2025Opens in a new window

Popular airlines from Ithaca, NY (ITH-Tompkins Regional) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Ithaca to Ontario (ITH-ONT)

Prices were available within the past 7 days and start at $324 for one-way flights and $484 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Dec 16 - Tue, Jan 20
ITH
Ithaca
ONT
Ontario
$484 Roundtrip, found 4 days ago
$484
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Dec 16 from Ithaca to Ontario, returning Tue, Jan 20, priced at $484 found 4 days ago
Delta
Tue, Dec 16 - Wed, Jan 14
ITH
Ithaca
ONT
Ontario
$509 Roundtrip, found 4 days ago
$509
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Dec 16 from Ithaca to Ontario, returning Wed, Jan 14, priced at $509 found 4 days ago
United
Fri, Oct 31 - Wed, Nov 5
ITH
Ithaca
ONT
Ontario
$733 Roundtrip, found 20 hours ago
$733
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 31 from Ithaca to Ontario, returning Wed, Nov 5, priced at $733 found 20 hours ago
United
Fri, Oct 31 - Tue, Nov 4
ITH
Ithaca
ONT
Ontario
$796 Roundtrip, found 20 hours ago
$796
Roundtrip
found 20 hours ago
Select United flight, departing Fri, Oct 31 from Ithaca to Ontario, returning Tue, Nov 4, priced at $796 found 20 hours ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $349
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $349
Flights from Ithaca (ITH) to Ontario (ONT)
Origin airport
Tompkins Regional
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
United
Roundtrip price
$484
Distance
2281 mi

Ithaca to Ontario Flights

The cheapest times to fly from Ithaca to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ithaca to Ontario are during the month of December. You can find some of the cheapest flights from Ithaca to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ithaca to Ontario

Sunday is one of the best days to book for cheap flights from Ithaca to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ithaca to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ithaca to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $324 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ithaca to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ithaca to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $324 or cheap return flight from $484 from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT)?
December is the cheapest month to fly from ITH to ONT. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline flying from ITH to ONT, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT)?
There aren't any daily direct flights from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from ITH to ONT?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) on schedule, pick a flight that takes off from Tompkins Regional Airport (ITH) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your plane ticket from ITH to ONT shortly before your trip is typically more expensive. But if you're flexible with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book an ITH to ONT flight and hotel package?
You can save money by securing an ITH to ONT flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your preferred accommodations and flights, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Tompkins Regional Airport (ITH) to Los Angeles - Ontario Intl. Airport (ONT)?
Typically, you're able to cancel or reschedule your ITH to ONT flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you need more details, head to our Customer Service portal.

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*Available to One Key members.