Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 3691
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
F9 3691 · IAD → ATL
departs 8:33 PM ET · arrives 10:44 PM ET
Forecast issued Fri 4:00 AM ET · 17h before departure
Watch this flight
Other days
Today
Sun 10/4 51%
Tue 10/6 25%
Wed 10/7 26%
Odds over time
Arrive at ATL more than 15 minutes late?
39%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
39%
Leave 15+ late
36%
Arrive 1h+ late
14%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.9d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
39%
Yes 39%
No 61%
Leave IAD more than 15 minutes late?
Calm-weather odds: 28% · changed −2 pts in 24h
−2 pts
36%
Yes 36%
No 64%
Arrive at ATL more than an hour late?
Calm-weather odds: 13% · changed +0 pts in 24h
+0 pts
14%
Yes 14%
No 86%
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
61%
15–30 min late
12%
30 min–1 hour late
13%
1–2 hours late
8%
Over 2 hours late
6%
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 37% of the time recently
↑
Arrivals into ATL at that hour are often late
↓
Other factors
↓
Mostly benign weather forecast at ATL
Weather at each end
IAD (origin)
Gusts 14 kt Ceiling 2,700 ft Visibility 10+ mi Precip 0.01 in
ATL (destination)
Gusts 8 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.02 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.