atl-to-ont

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The cheapest times to fly from ATL to ONT are

  • January 1st to March 4th
  • August 6th to November 18th
  • December 3rd to December 16th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ATL to ONT is late September. Prices can be as high as $1048 for Sunday flights during late July, or as low as $282 for Tuesday flights around late September.

 

When to Fly to Ontario

Flying from Atlanta, GA (ATL) to Ontario, CA (ONT) will usually cost between $306 to $564 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $328. Due to high demand the most expensive time to fly is late July, with an average price of $572. Planning your trip to low-cost times can easily save you $244 on economy flights and even more on first-class flights. Generally, any price below $421 can be considered a good price for a round-trip ATL to ONT flight.

See below for a graph of average weekly prices for the ATL to ONT route. All prices are for round-trip tickets in USD.

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ATL to ONT Flight Prices

Compared to other flights, the ATL to ONT flight is much cheaper than the average and costs much less than the average flight leaving from Atlanta. The average price per mile (for a direct flight) is $0.14, which is far below average.

 

Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $89 (19%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $386. Return trip prices are from the ONT to ATL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

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Departure Day Prices

Return Trip Prices by Day

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Return Day Prices

 

Nonstop Flights and Layovers

Travelers looking to fly from ATL to ONT can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 4 hour 24 minutes may be realistic.

 

Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from ATL to ONT while comparing.

Destination alternative #1: Los Angeles International Airport (LAX) in Los Angeles, CA

  • 47 miles (76 km) away from ONT
  • Usually 21.73% less expensive than ONT
  • Nonstop flights available

See ATL to LAX flights

Destination alternative #2: Bob Hope Airport (BUR) in Burbank, CA

  • 44 miles (71 km) away from ONT
  • Usually 3.80% less expensive than ONT
  • Nonstop flights available

See ATL to BUR flights

Destination alternative #3: Long Beach Airport (LGB) in Long Beach, CA

  • 36 miles (58 km) away from ONT
  • Usually 3.56% less expensive than ONT
  • 1-layover flights available

See ATL to LGB flights

 

Flight Questions Answered

Still have questions about flying from ATL to ONT? We’ve got answers.

Which airlines fly this route?

You can find 7 major airlines flying this route most often: Alaska, American, Delta, Frontier, JetBlue, Southwest, United, and potentially more during busy seasons.

How far away is it from Ontario International Airport to Hartsfield-Jackson Atlanta International Airport?

The distance between the two airports is roughly 1895 miles or 3050 kilometers.

How long does it take to fly from ATL to ONT?

The real-world flight time for a nonstop ATL to ONT flight is about 4 hour 24 minutes.

How many flights go between Atlanta, GA and Ontario, CA?

It depends on the day of the week and the date, but a typical day might have around 82 available flights from ATL to ONT.

 

Airport Location Info

 

Departing Airport

Origination codeATL
Origination airport nameHartsfield-Jackson Atlanta International Airport
CityAtlanta, GA
Countrythe United States
Latitude33.6
Longitude-84.4

Return Airport

Destination codeONT
Destination airport nameOntario International Airport
CityOntario, CA
Countrythe United States
Latitude34.1
Longitude-117.6

 

Late and Early Flight Data

Flights from ATL to ONT tend to depart as late as the average flight. According to our recently updated data, 25% of flights departed 5 or more minutes late, and 2% of flights left 5 or more minutes early. On average you can expect to leave ONT heading for ATL about 18 minutes late. This does significantly impact arrival time, as the average landing time in Ontario, CA is about 2 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

  • Delta: 18 minutes late
  • Some airlines not reporting

 

Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.