$104 Cheap Flights from Atlanta (ATL) to Ontario (ONT)

View $104 flight on Wed, Apr 30, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Atlanta to Ontario (ATL-ONT)

Prices were available within the past 7 days and start at $104 for one-way flights and $198 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, May 9 - Sat, May 17
ATL
Atlanta
ONT
Ontario
$198 Roundtrip, found 9 hours ago
$198
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Fri, May 9 from Atlanta to Ontario, returning Sat, May 17, priced at $198 found 9 hours ago
Frontier Airlines
Sat, May 3 - Sat, May 10
ATL
Atlanta
ONT
Ontario
$208 Roundtrip, found 8 hours ago
$208
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Sat, May 3 from Atlanta to Ontario, returning Sat, May 10, priced at $208 found 8 hours ago
Frontier Airlines
Tue, May 6 - Sun, May 11
ATL
Atlanta
ONT
Ontario
$218 Roundtrip, found 3 hours ago
$218
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, May 6 from Atlanta to Ontario, returning Sun, May 11, priced at $218 found 3 hours ago
Frontier Airlines
Thu, May 29 - Mon, Jun 2
ATL
Atlanta
ONT
Ontario
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, May 29 from Atlanta to Ontario, returning Mon, Jun 2, priced at $228 just found
Frontier Airlines
Tue, May 6 - Sun, May 11
ATL
Atlanta
ONT
Ontario
$238 Roundtrip, found 3 hours ago
$238
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, May 6 from Atlanta to Ontario, returning Sun, May 11, priced at $238 found 3 hours ago
Frontier Airlines
Wed, Jun 4 - Tue, Jun 10
ATL
Atlanta
ONT
Ontario
$246 Roundtrip, found 1 day ago
$246
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jun 4 from Atlanta to Ontario, returning Tue, Jun 10, priced at $246 found 1 day ago
Southwest Airlines
Sat, May 31 - Wed, Jun 4
ATL
Atlanta
ONT
Ontario
$279 Roundtrip, found 8 hours ago
$279
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Sat, May 31 from Atlanta to Ontario, returning Wed, Jun 4, priced at $279 found 8 hours ago
United
Tue, May 13 - Wed, May 14
ATL
Atlanta
ONT
Ontario
$302 Roundtrip, found 4 days ago
$302
Roundtrip
found 4 days ago
Select United flight, departing Tue, May 13 from Atlanta to Ontario, returning Wed, May 14, priced at $302 found 4 days ago
American Airlines
Tue, Jul 1 - Sat, Jul 5
ATL
Atlanta
ONT
Ontario
$307 Roundtrip, found 2 hours ago
$307
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Jul 1 from Atlanta to Ontario, returning Sat, Jul 5, priced at $307 found 2 hours ago
Hawaiian Airlines
Thu, Sep 25 - Thu, Oct 2
ATL
Atlanta
ONT
Ontario
$342 Roundtrip, found 1 day ago
$342
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Thu, Sep 25 from Atlanta to Ontario, returning Thu, Oct 2, priced at $342 found 1 day ago

Frequently asked questions

How much does a flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab cheap return flights starting from $325 from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Delta flight leaving ATL on May 20 2025 and touching down at ONT. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from ATL to ONT?
The cheapest flights from ATL to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
When heading out of Hartsfield-Jackson Atlanta Intl. Airport (ATL), you can jump on a direct flight to Los Angeles - Ontario Intl. Airport (ONT) with Delta Air Lines.
What is the cheapest airline that flies from ATL to ONT?
Right now, the cheapest airline offering one-way flights from ATL to ONT is Delta. You can book a seat on this route from $299. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ATL on July 19 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Each day, an average of 2 nonstop flights take off from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT). Select the departure date that best fits your schedule.
What are the most popular departure times for flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
More passengers fly between ATL and ONT at 8 PM than at any other point in the day. Looking for a quieter experience? Travel outside of rush hours and there’s a chance you’ll save on your ticket as well.
What day of the week has the most flights from ATL to ONT?
If you fly on a Friday, you’ll get the greatest range of choices for flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT).
What is the earliest flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Hop on the earliest flight at around 9:55AM UTC-5, leaving from Hartsfield-Jackson Atlanta Intl. Airport (ATL). You’ll be in the air for approximately 4h 55m, landing at Los Angeles - Ontario Intl. Airport (ONT) at approximately 11:50AM UTC-8.
How long does it take to fly from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
Flights from ATL to ONT have an average travel time of 4 hours and 53 minutes. The distance between these two airports is 1,900 mi.
What airline has the least delays from ATL to ONT?
Delta Air Lines has the best track record for on-time direct flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT), with an on-time rating of 84%. Use the Expedia App to look up your flight status before you take off and get real-time updates about any trip changes.
What is the best time to fly from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) on schedule, select a flight that takes off from Hartsfield-Jackson Atlanta Intl. Airport (ATL) 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.
What airports do you fly into for Ontario from Hartsfield-Jackson Atlanta Intl. Airport (ATL)?
Board a direct flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Ontario and land at any one of these airports:

  • Los Angeles Intl. Airport (LAX)
  • John Wayne Airport (SNA)
  • Los Angeles - Ontario Intl. Airport (ONT)

Is it cheaper to buy a plane ticket from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your flight from ATL to ONT just before your getaway is usually more expensive. However, if you’re flexible with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book an ATL to ONT flight and hotel package?
You’ll typically save money by booking an ATL 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 it all in one convenient place. Once you’ve selected your ideal flights and accommodations, you can add extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Los Angeles - Ontario Intl. Airport (ONT)?
If you reserved your ATL to ONT flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.
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