Logan International (BOS) Delays and On-Time Departures
Boston, MA · ranked 265th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Boston (BOS) had 143,447 scheduled departures and 76.5% of them left on time (US average 77.4%).
That ranks 265th of 333 US airports tracked on this site, with 2.8% of departures cancelled.
Allegiant Air was the most punctual airline here, with 87.1% of departures on time.
November has been the best month (83% on time) and Sunday the weakest day of the week (75%).
Best time of day to fly out of Boston (BOS)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 4am–5am | Limited data | 1 | |
| 5am–6am | 93.3% | 1.9% | 9,529 |
| 6am–7am | 92.4% | 2.0% | 23,269 |
| 7am–8am | 90.0% | 1.8% | 28,051 |
| 8am–9am | 88.0% | 1.6% | 23,145 |
| 9am–10am | 87.1% | 1.6% | 19,476 |
| 10am–11am | 84.0% | 1.4% | 16,873 |
| 11am–12pm | 82.7% | 1.5% | 16,400 |
| 12pm–1pm | 79.5% | 1.7% | 14,826 |
| 1pm–2pm | 79.4% | 1.5% | 13,535 |
| 2pm–3pm | 77.2% | 1.9% | 13,591 |
| 3pm–4pm | 71.5% | 2.2% | 18,723 |
| 4pm–5pm | 67.4% | 2.5% | 17,644 |
| 5pm–6pm | 66.3% | 3.0% | 19,811 |
| 6pm–7pm | 64.0% | 2.7% | 17,581 |
| 7pm–8pm | 62.5% | 3.5% | 16,429 |
| 8pm–9pm | 58.8% | 3.2% | 15,199 |
| 9pm–10pm | 59.7% | 4.2% | 4,421 |
| 10pm–11pm | 62.8% | 5.7% | 598 |
| 11pm–12am | Limited data | 9 | |
Airlines at BOS ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| Allegiant Air | 87.1% | 83.6% | 0.7% | 607 |
| United Airlines | 81.3% | 78.7% | 1.9% | 12,960 |
| Hawaiian Airlines | 80.6% | 73.1% | 1.5% | 68 |
| Envoy Air | 79.5% | 80.2% | 2.2% | 2,035 |
| Delta Air Lines | 79.1% | 76.9% | 2.1% | 26,458 |
| Republic Airways | 79.0% | 78.0% | 4.0% | 34,144 |
| Alaska Airlines | 78.9% | 72.3% | 1.1% | 2,443 |
| American Airlines | 78.0% | 78.6% | 2.5% | 17,113 |
| Frontier Airlines | 74.8% | 69.0% | 1.7% | 930 |
| JetBlue | 72.6% | 71.7% | 3.0% | 37,422 |
| Southwest Airlines | 64.9% | 70.8% | 1.6% | 7,248 |
| Spirit Airlines | 64.4% | 64.2% | 5.2% | 2,019 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of BOS
On-time departures by day, 24 months.
Best month to fly out of BOS
On-time departures by month, 24 months.
Holiday travel at Boston (BOS)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 80.6% | +0.9 pts | 0.8% | 5,466 |
| Christmas & New Year (Dec 20 - Jan 3) | 68.4% | -11.4 pts | 2.5% | 10,396 |
| Summer peak (Jun 15 - Aug 15) | 72.5% | -7.3 pts | 3.9% | 52,335 |
| All other days | 79.8% | — | 1.8% | 220,914 |
Monthly on-time departure trend at BOS
On-time departure % each month, with the 12-month US average for reference.
Routes from Boston (BOS)
Every route from BOS with its own page, by number of flights (last 12 months, on-time arrivals).