Schedule: a typical summer Sunday (the flights of Jul 26, 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
Sunday, October 4
F9 2551 · PHL → ATL
departs 6:30 AM ET · arrives 9:05 AM ET
Forecast issued Fri 2:00 AM ET · 52h before departure
Watch this flight
Other days
Today 19%
Sat 10/3 18%
Sun 10/4
Mon 10/5 25%
Tue 10/6 19%
Wed 10/7 17%
Odds over time
Arrive at ATL more than 15 minutes late?
28%
chance · ±0 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
16%
Arrive 1h+ late
8%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.4d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
28%
Yes 28%
No 72%
Leave PHL more than 15 minutes late?
Calm-weather odds: 15% · changed – in 24h
–
16%
Yes 16%
No 84%
Arrive at ATL more than an hour late?
Calm-weather odds: 8% · changed – in 24h
–
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to ATL?
On time or early
71%
15–30 min late
14%
30 min–1 hour late
6%
1–2 hours late
4%
Over 2 hours late
3%
Cancelled
1%
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 1 mi, 1.4 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 12 kt Ceiling 200 ft Visibility 1 mi Precip 0.11 in
ATL (destination)
Gusts 10 kt Ceiling 300 ft Visibility 1 mi Precip 1.36 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.