Schedule: a typical summer Wednesday (the flights of Jul 29, 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
Wednesday, September 30
F9 2551 · PHL → ATL
departs 6:30 AM ET · arrives 9:05 AM ET
Forecast issued Wed 10:00 PM ET · 16h after departure
Watch this flight
Other days
Wed 9/30
Today 18%
Sat 10/3 17%
Sun 10/4 21%
Mon 10/5 25%
Tue 10/6 19%
Wed 10/7 17%
Odds over time
Arrive at ATL more than 15 minutes late?
30%
chance · ±0 pts
+9 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
30%
Leave 15+ late
18%
Arrive 1h+ late
9%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 30% · changed +9 pts in 24h
+9 pts
30%
Yes 30%
No 70%
Leave PHL more than 15 minutes late?
Calm-weather odds: 18% · changed +3 pts in 24h
+3 pts
18%
Yes 18%
No 82%
Arrive at ATL more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to ATL?
On time or early
69%
15–30 min late
8%
30 min–1 hour late
13%
1–2 hours late
6%
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
↑
This flight has been late 28% of the time recently
↑
Cloud base down to 200 ft, visibility down to 0.5 mi forecast at ATL that day
↓
Early flights usually leave on time
↓
Other factors
Weather at each end
PHL (origin)
Gusts 8 kt Ceiling 4,500 ft Visibility 10+ mi Precip none
ATL (destination)
Gusts 9 kt Ceiling 200 ft Visibility 0.5 mi Precip none
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.