Best Time to Fly JFK to PWM: On-Time Stats by Hour & Airline
John F. Kennedy International → Portland International Jetport
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.5% of New York (JFK) to Portland (PWM) flights arrived on time (398 scheduled flights). That is 3.1 points below the national average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 92.9%, while JetBlue trailed at 71.4%.
November has been the best month (93% on time) and Sunday the weakest day of the week (67%).
4.3% of flights were cancelled, versus 1.8% nationally.
JFK to PWM 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 | 92.9% | 124 min | 9.7% | 62 |
| JetBlue | 71.4% | 80 min | 3.3% | 336 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly JFK to PWM
On-time arrival % by scheduled departure hour (local time), 1,129 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 5 | |
| 8am–9am | Limited data | 29 | |
| 9am–10am | Limited data | 14 | |
| 10am–11am | 73.6% | 0.0% | 53 |
| 11am–12pm | Limited data | 18 | |
| 12pm–1pm | 83.5% | 2.5% | 361 |
| 1pm–2pm | 72.3% | 3.0% | 67 |
| 3pm–4pm | 86.7% | 3.2% | 31 |
| 5pm–6pm | Limited data | 34 | |
| 8pm–9pm | Limited data | 26 | |
| 9pm–10pm | 72.4% | 1.5% | 196 |
| 10pm–11pm | 65.3% | 9.0% | 279 |
| 11pm–12am | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on JFK to PWM
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 | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 14 | ||
| Summer peak (Jun 15 - Aug 15) | 53.2% | -26.4 pts | 12.0% | 267 |
| All other days | 79.6% | — | 1.8% | 836 |
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).