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 4545
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
F9 4545 · DEN → SEA
departs 7:13 AM MT · arrives 9:17 AM PT
Forecast issued Fri 10:00 PM ET · 13h after departure
Watch this flight
Other days
Fri 10/2
Today 37%
Mon 10/5 33%
Fri 10/9 19%
Odds over time
Arrive at SEA more than 15 minutes late?
22%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
22%
Leave 15+ late
21%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.5d
2d
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 22% · changed −3 pts in 24h
−3 pts
22%
Yes 22%
No 78%
Leave DEN more than 15 minutes late?
Calm-weather odds: 21% · changed −6 pts in 24h
−6 pts
21%
Yes 21%
No 79%
Arrive at SEA more than an hour late?
Calm-weather odds: 5% · changed −3 pts in 24h
−3 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
77%
15–30 min late
13%
30 min–1 hour late
4%
1–2 hours late
4%
Over 2 hours late
1%
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
↑
DEN is busy at that time
↓
Gusts to 29 kt forecast at DEN that day
↓
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 10 kt Ceiling 1,500 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.