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 4427
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
F9 4427 · BWI → ATL
departs 8:36 AM ET · arrives 10:47 AM ET
Forecast issued Sat 11:00 AM ET · 46h before departure
Watch this flight
Other days
Today 33%
Sun 10/4 30%
Mon 10/5
Tue 10/6 17%
Wed 10/7 18%
Thu 10/8 19%
Fri 10/9 22%
Odds over time
Arrive at ATL more than 15 minutes late?
30%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
17%
Arrive 1h+ late
8%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.4d
Now
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 19% · changed +0 pts in 24h
+0 pts
30%
Yes 30%
No 70%
Leave BWI more than 15 minutes late?
Calm-weather odds: 17% · changed +0 pts in 24h
+0 pts
17%
Yes 17%
No 83%
Arrive at ATL more than an hour late?
Calm-weather odds: 6% · changed −2 pts in 24h
−2 pts
8%
Yes 8%
No 92%
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
12%
30 min–1 hour late
9%
1–2 hours late
4%
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
↑
F9's recent on-time record
↑
Cloud base down to 300 ft, visibility down to 1 mi, 0.5 in of rain forecast at ATL that day
↑
This flight has been late 23% of the time recently
↓
Mondays in October are usually quieter than average
↓
Other factors
Weather at each end
BWI (origin)
Gusts 18 kt Ceiling 200 ft Visibility 0.5 mi Precip none
ATL (destination)
Gusts 13 kt Ceiling 300 ft Visibility 1 mi Precip 0.48 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.