Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 2551
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
F9 2551 · PHL → ATL
departs 6:30 AM ET · arrives 9:05 AM ET
Forecast issued Sat 1:00 AM ET · 54h before departure
Watch this flight
Other days
Today 23%
Sun 10/4 30%
Mon 10/5
Fri 10/9 18%
Odds over time
Arrive at ATL more than 15 minutes late?
31%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
18%
Arrive 1h+ late
12%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.3d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
31%
Yes 31%
No 69%
Leave PHL more than 15 minutes late?
Calm-weather odds: 17% · changed – in 24h
–
18%
Yes 18%
No 82%
Arrive at ATL more than an hour late?
Calm-weather odds: 9% · changed – in 24h
–
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
2%
Yes 2%
No 98%
How late will it get to ATL?
On time or early
67%
15–30 min late
11%
30 min–1 hour late
8%
1–2 hours late
6%
Over 2 hours late
5%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
F9's recent on-time record
↑
Cloud base down to 300 ft, visibility down to 2 mi, 0.7 in of rain forecast at ATL that day
↑
This flight has been late 28% of the time recently
↓
Early flights usually leave on time
↓
Other factors
Weather at each end
PHL (origin)
Gusts 19 kt Ceiling 200 ft Visibility 0.4 mi Precip none
ATL (destination)
Gusts 14 kt Ceiling 300 ft Visibility 2 mi Precip 0.67 in
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.