Schedule: a typical summer Wednesday (the flights of Jul 29, 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
Wednesday, September 30
F9 4545 · DEN → SEA
departs 7:13 AM MT · arrives 9:17 AM PT
Forecast issued Wed 10:00 PM ET · 13h after departure
Watch this flight
Other days
Wed 9/30
Today 33%
Mon 10/5 26%
Fri 10/9 19%
Odds over time
Arrive at SEA more than 15 minutes late?
16%
chance · ±0 pts
−11 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
16%
Leave 15+ late
17%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 16% · changed −11 pts in 24h
−11 pts
16%
Yes 16%
No 84%
Leave DEN more than 15 minutes late?
Calm-weather odds: 17% · changed −2 pts in 24h
−2 pts
17%
Yes 17%
No 83%
Arrive at SEA more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
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
83%
15–30 min late
8%
30 min–1 hour late
5%
1–2 hours late
2%
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
↓
Mostly benign weather forecast at DEN
↓
Early flights usually leave on time
Weather at each end
DEN (origin)
Gusts 20 kt Ceiling 8,000 ft Visibility 10+ mi Precip 0.03 in
SEA (destination)
Gusts 9 kt Ceiling 1,300 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.