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Route

Atlanta → Ontario

ATLAtlantaHartsfield Jackson Atlanta International Airport
ONTOntarioOntario International Airport
Distance
1,895 mi
Estimated flight time
~4h 20m

Ontario is currently 3 hours behind Atlanta.

Observed nonstop

View the reverse route

How often does this route fly?

Frequency

A couple of times a day

On average around 2 flights a day, observed from October 2025 to September 2026.

2
flights per day
3
busiest month · Oct
1
quietest month · Mar
4 hr 10 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 2Jan2026
  2. 2Feb
  3. 1Mar
  4. 1Apr
  5. 3May
  6. 2.5Jun
  7. 3Jul
  8. 2Aug
  9. 2Sep
  10. 3Oct2025
  11. 2Nov
  12. 2Dec

Airlines

Who flies it

Delta Air Linesall year

Through the day

Departure times

Local time in Atlanta. Most departures between 08:00 and 11:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 2.3Mon
  2. 2.1Tue
  3. 1.8Wed
  4. 2Thu
  5. 2.1Fri
  6. 2.1Sat
  7. 1.8Sun

Fleet

Aircraft observed

  1. Airbus A321A321101%
All the numbers in a table
MonthPer daySeenAirlines
January 2026255
  • Delta Air Lines54×
February 2026255
  • Delta Air Lines55×
March 2026140
  • Delta Air Lines39×
April 2026141
  • Delta Air Lines41×
May 2026373
  • Delta Air Lines73×
June 20262.574
  • Delta Air Lines74×
July 2026378
  • Delta Air Lines78×
August 2026268
  • Delta Air Lines68×
September 2026264
  • Delta Air Lines64×
October 2025376
  • Delta Air Lines76×
November 2025258
  • Delta Air Lines57×
December 2025251
  • Delta Air Lines51×

Airlines observed on this route

From observed callsign routes on ATL-ONT - not a booking guarantee.

Delta Air Lines

DL · DAL

Hub: ATL Atlanta

221 departure airportsView airline →

About this route

  • Domestic route: both airports are in the same country.
  • The opposite direction has also been observed as a direct connection.
  • Direct destinations observed from Atlanta: 203.
  • Direct destinations observed from Ontario: 63.

The airports on this route

Hartsfield Jackson Atlanta International Airport

Atlanta, United StatesATL / KATL

International hub · 203 direct destinations · 5 runways · longest runway 12,388 ft

80 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Ontario International Airport

Ontario, United StatesONT / KONT

Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft

82 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Alternative airports for this journey

Same journey, a different airport nearby - with an observed direct connection.

ATL SNAJohn Wayne Orange County International AirportSanta Ana is about 30 mi from Ontario.View route →ATL HHRJack Northrop Field Hawthorne Municipal AirportHawthorne is about 43 mi from Ontario.View route →ATL BURHollywood Burbank/Bob Hope AirportBurbank is about 45 mi from Ontario.View route →ATL LAXLos Angeles International AirportLos Angeles is about 47 mi from Ontario.View route →

About the route from Atlanta to Ontario

The observed direct connection between Hartsfield Jackson Atlanta International Airport (ATL) and Ontario International Airport (ONT) covers approximately 1,895 mi. The estimated flight time is around 4h 20m. Delta Air Lines has been observed on this connection in the available route data.

Frequently asked questions about this route

How far is Atlanta from Ontario by air?
The great-circle distance between Hartsfield Jackson Atlanta International Airport and Ontario International Airport is approximately 1,895 mi.
How long is the flight from Atlanta to Ontario?
Based on the distance, the estimated flight time is about 4h 20m. This is an estimate, not a schedule.
Is there a direct connection from Atlanta to Ontario?
Yes, a direct connection between ATL and ONT has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: Delta Air Lines.
How often is there a flight from Atlanta to Ontario?
On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 733 observed flights. Mainly Delta Air Lines. That is an observation, not a timetable.
What is the current time difference between Atlanta and Ontario?
Ontario is currently 3 hours behind Atlanta.

Where this data comes from

The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.

The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.

Route data updated on October 11, 2026.