Route on-time record
EYW to PHL: most on-time flights and the best time to fly
Key West (Key West International Airport) to Philadelphia (Philadelphia International Airport). 493 nonstop flights in Jun 2025 to May 2026, 68% arrived within 15 minutes and 2.8% were cancelled. The most reliable flight number was American 1417 at 5:42 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
EYW → PHL
Key West to Philadelphia: 493 nonstop flights a year
On time (12 months)
68%
Cancelled
2.8%
avg delay 39 min
Best time to leave
Noon to 3 PM
81% on time vs 60% 3 to 6 PM
Most reliable airline
American
59% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · American 1417
5:42 PM → 8:46 PM3h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20.
58%
chance on time
- On time (history)
- 61%
- Cancelled
- 0.0%
- Avg arrival delay
- 58 min
- Arrived on time 61% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 60% on time; Noon to 3 PM: 81%).
Limited track record · 44 flights
Find American 1417 fares Opens this date on Aviasales#2 · American 3147
5:04 PM → 8:07 PM3h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
58%
chance on time
- On time (history)
- 60%
- Cancelled
- 3.0%
- Avg arrival delay
- 51 min
- Arrived on time 60% of the time (254 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 60% on time; Noon to 3 PM: 81%).
- 61% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 254 flights
Find American 3147 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines59%
321 flights · 59% on time as flown · 2.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Noon to 3 PM81%
189 flights · avg delay 11 min
- 3 to 6 PM60%
303 flights · avg delay 56 min
Best day: Thursday (75%). Worst: Saturday (60%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft54%
- Airline (crew, maintenance, boarding)28%
- Severe weather13%
- Air traffic control and airport volume5%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
EYW to PHL questions
- What time of day is best to fly EYW to PHL?
- Noon to 3 PM: 81% of flights arrived on time, against 60% for departures 3 to 6 PM.
- Which airline is most on time from EYW to PHL?
- American, with a season-adjusted 59% chance of operating and arriving on time over 321 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on EYW to PHL?
- July (52% on time); the best was October (83%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from EYW
- PHL to EYW (return)
- EYW to ATL 86%
- EYW to CLT 82%
- EYW to MIA 80%
- EYW to ORD 67%
- EYW to DCA 76%
- EYW to EWR 70%
- EYW to LGA 71%
- EYW to DFW 69%
- EYW to PIE 83%
Live status: FAA delays and ground stops