Best Time to Fly EWR to BUF: On-Time Stats by Hour & Airline
Newark Liberty International → Buffalo Niagara International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.0% of Newark (EWR) to Buffalo (BUF) flights arrived on time (481 scheduled flights). That is 3.3 points above the national average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 84.6%, while United Airlines trailed at 65.1%.
May has been the best month (84% on time) and Monday the weakest day of the week (71%).
5.0% of flights were cancelled, versus 1.8% nationally.
EWR 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 |
|---|---|---|---|---|
| Republic Airways | 84.6% | 70 min | 5.8% | 394 |
| United Airlines | 65.1% | 79 min | 1.1% | 87 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EWR to BUF
On-time arrival % by scheduled departure hour (local time), 1,074 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 95.3% | 0.8% | 130 |
| 9am–10am | 80.8% | 3.1% | 97 |
| 10am–11am | 85.5% | 0.0% | 83 |
| 2pm–3pm | 97.2% | 0.0% | 71 |
| 4pm–5pm | 86.0% | 12.3% | 106 |
| 5pm–6pm | Limited data | 14 | |
| 8pm–9pm | 76.6% | 11.3% | 53 |
| 9pm–10pm | 64.0% | 4.0% | 396 |
| 10pm–11pm | 61.2% | 6.5% | 124 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EWR 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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 72.2% | -5.2 pts | 10.0% | 40 |
| Summer peak (Jun 15 - Aug 15) | 73.2% | -4.2 pts | 11.3% | 231 |
| All other days | 77.4% | — | 2.4% | 779 |
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).