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 4427
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
F9 4427 · BWI → ATL
departs 8:36 AM ET · arrives 10:47 AM ET
Forecast issued Fri 7:00 PM ET · 38h before departure
Watch this flight
Other days
Today 22%
Sat 10/3 25%
Sun 10/4
Mon 10/5 25%
Tue 10/6 17%
Wed 10/7 18%
Thu 10/8 19%
Odds over time
Arrive at ATL more than 15 minutes late?
35%
chance · ±4 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
35%
Leave 15+ late
19%
Arrive 1h+ late
7%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 22% · changed +2 pts in 24h
+2 pts
35%
Yes 35%
No 65%
Leave BWI more than 15 minutes late?
Calm-weather odds: 19% · changed +2 pts in 24h
+2 pts
19%
Yes 19%
No 81%
Arrive at ATL more than an hour late?
Calm-weather odds: 8% · changed −1 pt in 24h
−1 pt
7%
Yes 7%
No 93%
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
65%
15–30 min late
13%
30 min–1 hour late
14%
1–2 hours late
3%
Over 2 hours late
4%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 300 ft, visibility down to 1 mi, 2.0 in of rain forecast at ATL that day
↑
F9's recent on-time record
↑
This flight has been late 23% of the time recently
↓
Early flights usually leave on time
↓
8am departures from BWI are usually not late
Weather at each end
BWI (origin)
Gusts 12 kt Ceiling 200 ft Visibility 1 mi Precip 0.38 in
ATL (destination)
Gusts 11 kt Ceiling 300 ft Visibility 1 mi Precip 1.96 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.