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 4545
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
F9 4545 · DEN → SEA
departs 7:13 AM MT · arrives 9:17 AM PT
Forecast issued Sat 4:00 PM ET · 17h before departure
Watch this flight
Other days
Today 34%
Sun 10/4
Mon 10/5 25%
Fri 10/9 19%
Odds over time
Arrive at SEA more than 15 minutes late?
31%
chance · ±0 pts
+9 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
19%
Arrive 1h+ late
7%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.5d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 25% · changed +9 pts in 24h
+9 pts
31%
Yes 31%
No 69%
Leave DEN more than 15 minutes late?
Calm-weather odds: 19% · changed +1 pt in 24h
+1 pt
19%
Yes 19%
No 81%
Arrive at SEA more than an hour late?
Calm-weather odds: 6% · 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 SEA?
On time or early
68%
15–30 min late
20%
30 min–1 hour late
4%
1–2 hours late
6%
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
↑
Arrivals into SEA at that hour are often late
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at DEN
Weather at each end
DEN (origin)
Gusts 24 kt Ceiling none (clear) Visibility 10+ mi Precip none
SEA (destination)
Gusts 6 kt Ceiling 400 ft Visibility 9 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.