BOS to PHL flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to Philadelphia International Airport · 280 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOS or PHL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boston (BOS) to Philadelphia (PHL) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.1% were cancelled, and 10% arrived an hour or more late.
- Republic Airways was the most punctual airline here (79% on time); JetBlue was the least (72%).
- Departures scheduled around 6am did best (95% on time); around 8pm did worst (56%).
- Saturday was the most reliable day to fly (85% on time) and Monday the least (73%).
- The largest source of delay minutes was late-arriving aircraft (58%).
Which airline is most on time from BOS to PHL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Frontier Airlines | 79% | 0.0% | 13 min | 7.0% | 43 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 79% | 3.4% | 15 min | 9.1% | 1,772 |
| American Airlines | 76% | 2.8% | 26 min | 10.7% | 2,274 |
| JetBlue | 72% | 3.3% | 19 min | 12.4% | 892 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am92%130 flights
- 6am95%381 flights
- 7am92%402 flights
- 8am85%417 flights
- 9am86%404 flights
- 10am84%236 flights
- 11am81%349 flights
- 12pm76%221 flights
- 1pm76%209 flights
- 2pm74%135 flights
- 3pm73%572 flights
- 4pm66%227 flights
- 5pm66%336 flights
- 6pm58%259 flights
- 7pm60%430 flights
- 8pm56%251 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%5.8% cancelled
- Tuesday78%3.9% cancelled
- Wednesday78%1.5% cancelled
- Thursday74%1.5% cancelled
- Friday76%0.8% cancelled
- Saturday85%2.2% cancelled
- Sunday73%5.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft58%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion14%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather57%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)18%
- Security0%
BOS to PHL: common questions
- How often are BOS to PHL flights on time?
- 77% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Boston to Philadelphia cancelled?
- 3.1% of scheduled flights were cancelled (152 of 4,981).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 86 min behind schedule on average, and 10.4% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHL to BOS — 75% on time
More flights from Boston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOS → PHL, nonstop flights by US airlines that report to the DOT. How we calculate this.