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 4545
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
F9 4545 · DEN → SEA
departs 7:13 AM MT · arrives 9:17 AM PT
Forecast issued Sat 6:00 PM ET · 39h before departure
Watch this flight
Other days
Today 35%
Sun 10/4 25%
Mon 10/5
Fri 10/9 19%
Odds over time
Arrive at SEA more than 15 minutes late?
25%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
19%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.4d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
25%
Yes 25%
No 75%
Leave DEN more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
19%
Yes 19%
No 81%
Arrive at SEA more than an hour late?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
74%
15–30 min late
14%
30 min–1 hour late
6%
1–2 hours late
3%
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
↑
SEA is prone to delays
↑
Cloud base down to 200 ft forecast at SEA that day
↓
Mostly benign weather forecast at DEN
↓
Early flights usually leave on time
Weather at each end
DEN (origin)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
SEA (destination)
Gusts 6 kt Ceiling 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.