£264 Cheap Delta flights from Atlanta to Ontario (ATL→ONT)

View £264 flight on Tue, 20 Jan 2026Opens in a new window
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Delta flights from Atlanta to Ontario (ATL→ONT)

Prices were available within the past 7 days and start at £264 for one-way flights and £236 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 20 Jan - Tue, 27 Jan
ATL
Atlanta
ONT
Ontario
£236 Return, found 18 hours ago
£236
Return
found 18 hours ago
Select Delta flight, departing Tue, 20 Jan from Atlanta to Ontario, returning Tue, 27 Jan, priced at £236 found 18 hours ago
Delta
Tue, 20 Jan - Tue, 27 Jan
ATL
Atlanta
ONT
Ontario
£302 Return, found 18 hours ago
£302
Return
found 18 hours ago
Select Delta flight, departing Tue, 20 Jan from Atlanta to Ontario, returning Tue, 27 Jan, priced at £302 found 18 hours ago
Delta
Tue, 20 Jan - Tue, 27 Jan
ATL
Atlanta
ONT
Ontario
£435 Return, found 18 hours ago
£435
Return
found 18 hours ago
Select Delta flight, departing Tue, 20 Jan from Atlanta to Ontario, returning Tue, 27 Jan, priced at £435 found 18 hours ago
Delta
Tue, 20 Jan - Tue, 27 Jan
ATL
Atlanta
ONT
Ontario
£441 Return, found 18 hours ago
£441
Return
found 18 hours ago
Select Delta flight, departing Tue, 20 Jan from Atlanta to Ontario, returning Tue, 27 Jan, priced at £441 found 18 hours ago
Flight from Atlanta to Ontario route information
Origin airport
Hartsfield-Jackson Atlanta Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Popular airline
Delta
Distance
3029 km
Average flight time
1 hour 23 mins

Frequently asked questions

How much is a Delta Air Lines flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the "Price (lowest to highest)" filter on Expedia to look for cheap Delta Air Lines round-trip flights from £236 from ATL to ONT. Affordable one-way tickets from £264 are available as well.**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 ATL to ONT with Delta Air Lines?
Delta Air Lines flights to Ontario are generally more affordable in the quieter months of January and April. Whether you're searching for a one-way or round-trip ticket, you could land a better deal then.
Does Delta Air Lines fly nonstop from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Book a seat on one of Delta Air Lines's 14 weekly direct flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT). To view available options, enter your destination, origin and dates and hit search. Then use the "Nonstop" and "Airline" filters.
How long does it take to fly from ATL to ONT with Delta Air Lines?
On average, it takes 4h 53m to travel nonstop from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines.
Which day of the week has the most Delta Air Lines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Tuesday has the most Delta Air Lines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT). With 2 daily departures, this is a great day to find something that will suit your schedule.
What airports does Delta Air Lines fly into in Ontario?
Los Angeles - Ontario Intl. Airport (ONT) is the main Ontario gateway for Delta Air Lines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL). Los Angeles Intl. Airport (LAX) and John Wayne Airport (SNA) are two other possibilities. When organising your break through Expedia, choose the "All Airports" option for your destination to see everything that's available.
What type of plane does Delta Air Lines fly from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Hop on a Delta Air Lines flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT), and you'll likely be flying on an Airbus A321. Keep in mind though, that the aircraft type can change depending on operational requirements.
Can I change or cancel my Delta Air Lines flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
It's usually possible to cancel or change your flight, although there may be additional charges if you made your booking over 24 hours ago. Need flexible options? Make use of our "No cancel fee" or "Changes included" filter to find flights that won't charge you extra if you need to adjust your plans. To modify your itinerary, go to "Trips," select your flight and click on "Manage Booking" for more information.
*Available to Expedia members.