Best Time to Fly BUF to PHX: On-Time Stats by Hour & Airline
Buffalo Niagara International → Phoenix Sky Harbor International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.7% of Buffalo (BUF) to Phoenix (PHX) flights arrived on time (199 scheduled flights). That is 2.1 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Sunday was the most reliable day (81% on time) and July the worst month (60%).
The cancellation rate was 0.5% (US average 1.8%).
BUF to PHX 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 | 79.7% | 56 min | 0.5% | 199 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BUF to PHX
On-time arrival % by scheduled departure hour (local time), 586 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 14 | |
| 6am–7am | 89.8% | 0.0% | 49 |
| 7am–8am | 91.1% | 0.0% | 45 |
| 8am–9am | Limited data | 24 | |
| 11am–12pm | Limited data | 6 | |
| 12pm–1pm | Limited data | 17 | |
| 1pm–2pm | Limited data | 21 | |
| 2pm–3pm | Limited data | 14 | |
| 3pm–4pm | 74.0% | 0.8% | 120 |
| 4pm–5pm | 76.1% | 0.0% | 144 |
| 5pm–6pm | 70.7% | 1.3% | 76 |
| 6pm–7pm | Limited data | 9 | |
| 7pm–8pm | 61.7% | 0.0% | 47 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BUF to PHX
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) | 71.0% | -8.4 pts | 3.1% | 32 |
| Summer peak (Jun 15 - Aug 15) | 63.2% | -16.1 pts | 0.0% | 69 |
| All other days | 79.4% | — | 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).