Best Time to Fly PHX to BOS: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Logan International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.6% of Phoenix (PHX) to Boston (BOS) flights arrived on time (2,015 scheduled flights). That is 1.0 points below the national average of 77.6%.
Delta Air Lines was the most punctual of the 3 airlines on the route at 77.4%, while JetBlue trailed at 72.2%.
December has been the best month (83% on time) and Thursday the weakest day of the week (73%).
1.8% of flights were cancelled, versus 1.8% nationally.
PHX to BOS 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 | 77.4% | 105 min | 2.1% | 429 |
| American Airlines | 77.2% | 68 min | 1.6% | 1,313 |
| JetBlue | 72.2% | 80 min | 2.2% | 273 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to BOS
On-time arrival % by scheduled departure hour (local time), 4,241 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 78.0% | 0.0% | 360 |
| 9am–10am | 85.0% | 0.9% | 337 |
| 10am–11am | 78.3% | 4.2% | 48 |
| 11am–12pm | 79.1% | 0.0% | 91 |
| 12pm–1pm | 75.0% | 0.2% | 535 |
| 1pm–2pm | 74.2% | 1.8% | 597 |
| 2pm–3pm | 81.6% | 0.0% | 49 |
| 3pm–4pm | 70.0% | 1.0% | 313 |
| 4pm–5pm | 76.2% | 2.2% | 276 |
| 5pm–6pm | 83.0% | 1.0% | 101 |
| 9pm–10pm | 80.3% | 1.2% | 247 |
| 10pm–11pm | 81.9% | 1.3% | 1,034 |
| 11pm–12am | 81.1% | 1.6% | 253 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHX to BOS
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) | 79.5% | -0.3 pts | 1.3% | 79 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.4% | -1.4 pts | 2.0% | 203 |
| Summer peak (Jun 15 - Aug 15) | 70.8% | -9.1 pts | 1.4% | 640 |
| All other days | 79.8% | — | 1.0% | 3,319 |
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).