Ontario (ONT) to Atlanta (ATL) flights
Delta Air Lines flies nonstop from Ontario International Airport to Hartsfield Jackson Atlanta International Airport, with about 19 flights a week in July 2026. The 1,900-mile flight takes about 4h 4m gate to gate.
- Distance
- 1,900 mi · 3,058 km
- Flight time
- 4h 4m
- Airlines
- 1
- Seats filled
- 88%
Airlines flying ONT to ATL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 19 | Airbus A321 | 151,948 | 4h 4m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ONT to ATL flight schedule
3 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 7:05am and the last at 10:00pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| DL 761Delta Air Lines | 7:05am | 2:29pm | 31 | 90% |
| DL 665Delta Air Lines | 12:00pm | 7:30pm | 31 | 84% |
| DL 2892Delta Air Lines | 10:00pm | 5:18am | 17 | 96% |
Is ONT to ATL on time?
From September 2025 to August 2026, 89% of 934 flights arrived within 15 minutes of schedule and 1.8% were cancelled. Flights leaving around 10pm were the most punctual (93%), those around 12pm the least (81%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (70%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 934 | 89% | 12 min | 1.8% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 7am to 8am | 266 | 92% | |
| 11am to 12pm | 144 | 86% | |
| 12pm to 1pm | 197 | 81% | |
| 1pm to 2pm | 24 | 91% | |
| 10pm to 11pm | 303 | 93% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 81 | 13,916 | |
| September 2025 | 77 | 12,783 | |
| October 2025 | 84 | 13,877 | |
| November 2025 | 82 | 12,836 | |
| December 2025 | 85 | 14,225 | |
| January 2026 | 61 | 9,522 | |
| February 2026 | 56 | 9,163 | |
| March 2026 | 57 | 9,830 | |
| April 2026 | 77 | 12,646 | |
| May 2026 | 92 | 15,085 | |
| June 2026 | 77 | 13,562 | |
| July 2026 | 82 | 14,503 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.