Airport reliability
Atlanta (ATL) on-time performance
How reliably flights leave Atlanta, GA (ATL) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Atlanta, GA315,727 departures in 12 months
- Departures on time
- 76.2% U.S. average 75.6%
- Cancelled
- 1.8% U.S. average 1.9%
- 60+ minutes late
- 7.4% U.S. average 8.1%
- Scheduled departures
- 315,727 12 months
What this means
ATL departures beat the U.S. average.
- 76.2% of the 315,727 scheduled departures from Atlanta (ATL) arrived at their destination on time, 0.6 points higher than the U.S. average of 75.6%.
- 1.8% of departures were cancelled (U.S. average 1.9%), and 7.4% arrived an hour or more late.
- Flights arriving at ATL were on time 80.3% of the time.
- Among airlines with at least 300 departures, United Airlines was the most punctual from ATL (78.2%) and Frontier Airlines the least (62.1%).
- Over the last 3 years, October was the most reliable month for departures from ATL (86.1% on time) and July the least reliable (63.7%).
- Cancellations peaked in January, when 3.7% of flights were cancelled.
- Flights scheduled to depart 6 am to 7 am were the most punctual (87.0% on time); flights scheduled to depart 6 pm to 7 pm were the least (67.0%).
Airlines at ATL
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| United Airlines | 78.2% | 1.5% | 8.7% | 84 min | 7,672 |
| Delta Air Lines | 78.0% | 1.7% | 6.3% | 59 min | 240,917 |
| Alaska Airlines | 77.9% | 0.8% | 5.7% | 54 min | 1,359 |
| Southwest Airlines | 75.2% | 1.1% | 7.3% | 59 min | 17,133 |
| American Airlines | 73.9% | 1.9% | 10.8% | 106 min | 6,907 |
| PSA AirlinesSold as American Eagle | 73.3% | 5.3% | 10.2% | 110 min | 3,319 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 72.7% | 2.6% | 11.7% | 106 min | 6,699 |
| Republic AirwaysSold as American Eagle, Delta Connection, United Express | 71.0% | 4.8% | 10.2% | 84 min | 3,135 |
| Envoy AirSold as American Eagle | 70.1% | 2.5% | 9.9% | 69 min | 1,064 |
| Spirit Airlines | 67.8% | 4.0% | 12.2% | 77 min | 3,886 |
| JetBlue Airways | 65.9% | 4.5% | 13.3% | 89 min | 2,858 |
| Frontier Airlines | 62.1% | 2.4% | 15.2% | 83 min | 20,778 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time ATL average 76.2%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 80.4% | 1,535 |
| Departing 6 am to 7 am | 87.0% | 5,879 |
| Departing 7 am to 8 am | 86.0% | 14,891 |
| Departing 8 am to 9 am | 86.6% | 23,848 |
| Departing 9 am to 10 am | 82.5% | 24,577 |
| Departing 10 am to 11 am | 81.9% | 18,021 |
| Departing 11 am to noon | 81.9% | 21,279 |
| Departing noon to 1 pm | 80.8% | 17,177 |
| Departing 1 pm to 2 pm | 79.2% | 16,030 |
| Departing 2 pm to 3 pm | 76.0% | 16,264 |
| Departing 3 pm to 4 pm | 72.2% | 22,900 |
| Departing 4 pm to 5 pm | 69.5% | 20,093 |
| Departing 5 pm to 6 pm | 68.5% | 16,713 |
| Departing 6 pm to 7 pm | 67.0% | 14,971 |
| Departing 7 pm to 8 pm | 67.5% | 20,841 |
| Departing 8 pm to 9 pm | 67.1% | 16,307 |
| Departing 9 pm to 10 pm | 72.4% | 19,461 |
| Departing 10 pm to 11 pm | 73.4% | 20,427 |
| Departing 11 pm to midnight | 75.8% | 4,513 |
Best and worst months at ATL
Share of scheduled flights on time 12-month average 76.2%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 75.0% | 74,791 |
| February | 81.4% | 70,485 |
| March | 76.9% | 81,596 |
| April | 79.6% | 80,516 |
| May | 72.7% | 84,680 |
| June | 73.6% | 84,050 |
| July | 63.7% | 86,691 |
| August | 76.4% | 84,054 |
| September | 84.7% | 82,430 |
| October | 86.1% | 86,644 |
| November | 85.0% | 81,376 |
| December | 78.8% | 82,805 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 86.3% | 25,839 |
| Oct 2025 | 81.3% | 27,556 |
| Nov 2025 | 78.2% | 25,888 |
| Dec 2025 | 71.3% | 25,764 |
| Jan 2026 | 74.3% | 24,595 |
| Feb 2026 | 79.0% | 23,024 |
| Mar 2026 | 72.0% | 26,669 |
| Apr 2026 | 81.1% | 26,607 |
| May 2026 | 76.1% | 27,535 |
| Jun 2026 | 78.7% | 26,961 |
| Jul 2026 | 64.6% | 28,068 |
| Aug 2026 | 72.9% | 27,221 |
Busiest routes from ATL
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| New York (LGA) | 68.6% | 4.3% | 6 | 8,502 |
| Orlando (MCO) | 68.9% | 1.6% | 4 | 8,267 |
| Fort Lauderdale (FLL) | 68.8% | 2.5% | 5 | 7,371 |
| Washington (DCA) | 66.0% | 3.4% | 6 | 6,798 |
| Dallas/Fort Worth (DFW) | 71.7% | 2.5% | 6 | 6,672 |
| Chicago (ORD) | 67.0% | 2.4% | 9 | 6,493 |
| Miami (MIA) | 69.9% | 1.6% | 6 | 6,280 |
| Newark (EWR) | 69.2% | 3.8% | 5 | 6,246 |
| Tampa (TPA) | 71.9% | 1.3% | 4 | 6,204 |
| Philadelphia (PHL) | 72.0% | 3.3% | 6 | 5,793 |
| Denver (DEN) | 76.9% | 1.1% | 4 | 5,594 |
| Baltimore (BWI) | 73.1% | 2.3% | 4 | 5,402 |
| Boston (BOS) | 71.2% | 2.3% | 4 | 5,054 |
| Houston (IAH) | 75.4% | 1.8% | 5 | 4,965 |
| Los Angeles (LAX) | 77.1% | 0.8% | 4 | 4,851 |
| Detroit (DTW) | 75.8% | 0.8% | 3 | 4,821 |
| Las Vegas (LAS) | 74.1% | 0.8% | 4 | 4,758 |
| Raleigh/Durham (RDU) | 78.7% | 1.5% | 3 | 4,642 |
| Austin (AUS) | 79.9% | 1.3% | 4 | 4,497 |
| Charlotte (CLT) | 78.5% | 1.9% | 4 | 4,381 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Atlanta, GA (ATL) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.