About 1 in 2 F9 1726 flights from Philadelphia arrived 15+ minutes late, diverted or cancelled over the past year (45%); 2.9% were cancelled. The typical flight landed 8 minutes late.
F9 1726: PHL → SJU
Scheduled to leave Philadelphia at 10:59 p.m. local time. Over the past year it arrived on time 55% of the time (206 flights), better than other F9 flights on the route at that hour (48%). Last seen in the data Aug 31, 2026.
Usually Frontier Airlines's last flight of the day from Philadelphia to San Juan (56% of days). Frontier Airlines's last PHL–SJU flight was cancelled 4.4% of the time, against 2.5% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 11:55 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 32 | 59% |
| Tuesday | 21 | 62% |
| Wednesday | 19 | — |
| Thursday | 35 | 54% |
| Friday | 36 | 42% |
| Saturday | 26 | 50% |
| Sunday | 37 | 57% |
Why it was late
All flights PHL → SJU · Connecting off F9 1726? Check the risk
Questions
How often is F9 1726 from PHL to SJU late?
Frontier Airlines 1726 from Philadelphia, PA to San Juan, PR arrived 15 or more minutes late, was diverted or was cancelled on 45% of 206 scheduled flights between September 2025 and August 2026. 2.9% 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.