Schedule: a typical summer Saturday (the flights of Jul 25, 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
Saturday, October 3
F9 1248 · DEN → GRR
departs 3:08 PM MT · arrives 7:40 PM ET
Forecast issued Thu 10:00 PM ET · 43h before departure
Watch this flight
Other days
Today 19%
Fri 10/2 26%
Sat 10/3
Sun 10/4 26%
Mon 10/5 24%
Odds over time
Arrive at GRR more than 15 minutes late?
20%
chance · ±1 pts
+1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
20%
Leave 15+ late
23%
Arrive 1h+ late
7%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.8d
Now
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 18% · changed +1 pt in 24h
+1 pt
20%
Yes 20%
No 80%
Leave DEN more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
23%
Yes 23%
No 77%
Arrive at GRR more than an hour late?
Calm-weather odds: 5% · 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 GRR?
On time or early
79%
15–30 min late
8%
30 min–1 hour late
4%
1–2 hours late
5%
Over 2 hours late
2%
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 DEN
Weather at each end
DEN (origin)
Gusts 20 kt Ceiling none (clear) Visibility 10+ mi Precip none
GRR (destination)
Gusts 11 kt Ceiling none (clear) Visibility 8 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.