About 1 in 4 F9 1517 flights from Philadelphia arrived 15+ minutes late, diverted or cancelled over the past year (26%); 4.1% were cancelled. The typical flight landed 10 minutes early.
F9 1517: PHL → RDU
Scheduled to leave Philadelphia at 12:01 p.m. local time. Over the past year it arrived on time 74% of the time (246 flights), worse than other F9 flights on the route at that hour (84%). Last seen in the data Aug 17, 2026.
Usually Frontier Airlines's last flight of the day from Philadelphia to Raleigh (64% of days). Frontier Airlines's last PHL–RDU flight was cancelled 5.5% of the time, against 1.2% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 7:20 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 40 | 57% |
| Tuesday | 19 | — |
| Wednesday | 23 | 87% |
| Thursday | 41 | 80% |
| Friday | 41 | 76% |
| Saturday | 37 | 73% |
| Sunday | 45 | 69% |
Why it was late
All flights PHL → RDU · Connecting off F9 1517? Check the risk
Questions
How often is F9 1517 from PHL to RDU late?
Frontier Airlines 1517 from Philadelphia, PA to Raleigh/Durham, NC arrived 15 or more minutes late, was diverted or was cancelled on 26% of 246 scheduled flights between September 2025 and August 2026. 4.1% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.