Best Time to Fly ATL to LGA: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → LaGuardia
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 73.1% of Atlanta (ATL) to New York (LGA) flights arrived on time (8,413 scheduled flights). That is 4.6 points below the national average of 77.6%.
Delta Air Lines was the most punctual of the 4 airlines on the route at 76.7%, while Frontier Airlines trailed at 49.2%.
September has been the best month (87% on time) and Sunday the weakest day of the week (70%).
4.0% of flights were cancelled, versus 1.8% nationally.
ATL to LGA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 76.7% | 62 min | 3.2% | 4,935 |
| Republic Airways | 76.0% | 88 min | 5.8% | 1,732 |
| Southwest Airlines | 71.2% | 64 min | 2.5% | 815 |
| Frontier Airlines | 49.2% | 102 min | 6.6% | 919 |
| Spirit Airlines | Limited data | 6 | ||
| American Airlines | Limited data | 6 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to LGA
On-time arrival % by scheduled departure hour (local time), 15,793 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.7% | 0.6% | 159 |
| 6am–7am | 92.5% | 2.6% | 1,271 |
| 7am–8am | 88.8% | 2.1% | 819 |
| 8am–9am | 86.8% | 1.8% | 986 |
| 9am–10am | 84.2% | 1.8% | 1,134 |
| 10am–11am | 85.6% | 1.9% | 820 |
| 11am–12pm | 82.0% | 2.2% | 1,041 |
| 12pm–1pm | 72.8% | 1.5% | 1,150 |
| 1pm–2pm | 77.9% | 2.1% | 797 |
| 2pm–3pm | 66.9% | 3.4% | 1,030 |
| 3pm–4pm | 66.8% | 4.5% | 1,164 |
| 4pm–5pm | 73.2% | 4.6% | 518 |
| 5pm–6pm | 64.6% | 4.2% | 683 |
| 6pm–7pm | 61.6% | 3.0% | 823 |
| 7pm–8pm | 60.9% | 3.8% | 1,424 |
| 8pm–9pm | 56.5% | 4.6% | 1,025 |
| 9pm–10pm | 64.1% | 4.0% | 949 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to LGA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 82.7% | +6.4 pts | 0.7% | 304 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.0% | -2.3 pts | 3.4% | 566 |
| Summer peak (Jun 15 - Aug 15) | 63.9% | -12.4 pts | 6.2% | 2,638 |
| All other days | 76.3% | — | 2.3% | 12,285 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).