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 1248
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
F9 1248 · DEN → GRR
departs 3:08 PM MT · arrives 7:40 PM ET
Forecast issued Fri 1:00 AM ET · 64h before departure
Watch this flight
Other days
Today 26%
Sat 10/3 19%
Sun 10/4
Mon 10/5 24%
Thu 10/8 11%
Odds over time
Arrive at GRR more than 15 minutes late?
25%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
27%
Arrive 1h+ late
7%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.8d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 23% · changed – in 24h
–
25%
Yes 25%
No 75%
Leave DEN more than 15 minutes late?
Calm-weather odds: 27% · changed – in 24h
–
27%
Yes 27%
No 73%
Arrive at GRR more than an hour late?
Calm-weather odds: 5% · changed – in 24h
–
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to GRR?
On time or early
74%
15–30 min late
13%
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
↑
3pm departures from DEN are often late
↑
Other factors
↓
GRR usually runs smoothly
↓
Mostly benign weather forecast at GRR
Weather at each end
DEN (origin)
Gusts 28 kt Ceiling none (clear) Visibility 10+ mi Precip none
GRR (destination)
Gusts 22 kt Ceiling 4,200 ft Visibility 10+ 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.