Best Time to Fly PHX to BUF: On-Time Stats by Hour & Airline
Phoenix Sky Harbor International → Buffalo Niagara International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.6% of Phoenix (PHX) to Buffalo (BUF) flights arrived on time (199 scheduled flights). That is 2.0 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (85% on time) and Thursday the weakest day of the week (64%).
1.0% of flights were cancelled, versus 1.8% nationally.
PHX to BUF 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 |
|---|---|---|---|---|
| Southwest Airlines | 75.6% | 39 min | 1.0% | 199 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHX to BUF
On-time arrival % by scheduled departure hour (local time), 586 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 25 | |
| 8am–9am | 87.3% | 0.0% | 55 |
| 9am–10am | 74.5% | 1.0% | 104 |
| 10am–11am | Limited data | 6 | |
| 11am–12pm | 72.3% | 1.2% | 84 |
| 1pm–2pm | Limited data | 18 | |
| 2pm–3pm | 78.8% | 0.0% | 52 |
| 3pm–4pm | 69.8% | 0.0% | 97 |
| 4pm–5pm | 63.0% | 0.0% | 108 |
| 5pm–6pm | 70.0% | 0.0% | 30 |
| 6pm–7pm | Limited data | 6 | |
| 7pm–8pm | Limited data | 1 | |
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 BUF
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) | Limited data | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 64.5% | -11.0 pts | 3.1% | 32 |
| Summer peak (Jun 15 - Aug 15) | 59.4% | -16.1 pts | 0.0% | 69 |
| All other days | 75.5% | — | 0.2% | 472 |
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).