$301 Cheap Flights from Wilmington (ILM) to Ontario (ONT)

View $301 flight on Fri, Jan 9, 2026Opens in a new window

Popular airlines from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Wilmington to Ontario (ILM-ONT)

Prices were available within the past 7 days and start at $301 for one-way flights and $359 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Feb 4 - Wed, Feb 11
ILM
Wilmington
ONT
Ontario
$359 Roundtrip, found 1 day ago
$359
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Feb 4 from Wilmington to Ontario, returning Wed, Feb 11, priced at $359 found 1 day ago
Delta
Wed, Feb 4 - Wed, Feb 11
ILM
Wilmington
ONT
Ontario
$364 Roundtrip, found 1 day ago
$364
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Feb 4 from Wilmington to Ontario, returning Wed, Feb 11, priced at $364 found 1 day ago
American Airlines
Fri, Dec 5 - Sun, Dec 7
ILM
Wilmington
ONT
Ontario
$369 Roundtrip, found 2 hours ago
$369
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Fri, Dec 5 from Wilmington to Ontario, returning Sun, Dec 7, priced at $369 found 2 hours ago
Delta
Fri, Dec 5 - Sun, Dec 7
ILM
Wilmington
ONT
Ontario
$374 Roundtrip, found 2 hours ago
$374
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Dec 5 from Wilmington to Ontario, returning Sun, Dec 7, priced at $374 found 2 hours ago
Delta
Sat, Apr 4 - Sat, Apr 11
ILM
Wilmington
ONT
Ontario
$379 Roundtrip, found 1 day ago
$379
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Apr 4 from Wilmington to Ontario, returning Sat, Apr 11, priced at $379 found 1 day ago
Delta
Sun, Nov 23 - Wed, Dec 3
ILM
Wilmington
ONT
Ontario
$379 Roundtrip, found 16 hours ago
$379
Roundtrip
found 16 hours ago
Select Delta flight, departing Sun, Nov 23 from Wilmington to Ontario, returning Wed, Dec 3, priced at $379 found 16 hours ago
Delta
Fri, Dec 5 - Sun, Dec 7
ILM
Wilmington
ONT
Ontario
$394 Roundtrip, found 2 hours ago
$394
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Dec 5 from Wilmington to Ontario, returning Sun, Dec 7, priced at $394 found 2 hours ago
Delta
Thu, Nov 20 - Fri, Dec 5
ILM
Wilmington
ONT
Ontario
$397 Roundtrip, found 5 days ago
$397
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Nov 20 from Wilmington to Ontario, returning Fri, Dec 5, priced at $397 found 5 days ago
Delta
Tue, Dec 16 - Wed, Dec 24
ILM
Wilmington
ONT
Ontario
$404 Roundtrip, found 1 day ago
$404
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Dec 16 from Wilmington to Ontario, returning Wed, Dec 24, priced at $404 found 1 day ago
United
Fri, Nov 14 - Sat, Nov 15
ILM
Wilmington
ONT
Ontario
$662 Roundtrip, found 8 hours ago
$662
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Nov 14 from Wilmington to Ontario, returning Sat, Nov 15, priced at $662 found 8 hours ago

Find the cheapest month to fly from Wilmington (ILM) to Ontario (ONT)

February is typically the cheapest month to fly

From $288 - $618 per traveler.

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 $343
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $343

Frequently asked questions

How much does a flight from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $301 or cheap return flight from $359 from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest month to fly from ILM to ONT is February, when there's less demand. Off-peak months are usually when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest ILM to ONT flight.
How many flights per day from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)?
You'll have to hop on a flight with a layover when traveling from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from ILM to ONT?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on various 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 Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)?
Book a flight from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this are on average 22% more likely to be canceled.**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 Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until right before your break to book a flight from ILM to ONT often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Be flexible with your itinerary for a better chance of scoring a bargain.
Is it cheaper to book an ILM to ONT flight and hotel package?
Opting for an ILM to ONT flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our impressive range of hotels and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Wilmington Intl. Airport (ILM) to Los Angeles - Ontario Intl. Airport (ONT)?
In most cases, you're able to cancel or reschedule your ILM to ONT flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you want more information, head to our Customer Service portal.

Travel information

Origin airport
Wilmington Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$358
Distance
2253 mi

Book with confidence

Wilmington to Ontario Flights

The cheapest times to fly from Wilmington 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 Wilmington to Ontario are during the month of February. You can find some of the cheapest flights from Wilmington to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Wilmington to Ontario

Sunday is one of the best days to book for cheap flights from Wilmington 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 Wilmington 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 Wilmington to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $301 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 Wilmington 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 Wilmington 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.

 

Wilmington to Ontario Flights

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*Available to One Key members.