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 687
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
F9 687 · DCA → DEN
departs 1:59 PM ET · arrives 3:53 PM MT
Forecast issued Fri 12:00 AM ET · 62h before departure
Watch this flight
Other days
Today 28%
Sat 10/3 17%
Sun 10/4
Mon 10/5 29%
Wed 10/7 17%
Thu 10/8 17%
Odds over time
Arrive at DEN more than 15 minutes late?
30%
chance · ±3 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
28%
Arrive 1h+ late
13%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.7d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
30%
Yes 30%
No 70%
Leave DCA more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
28%
Yes 28%
No 72%
Arrive at DEN more than an hour late?
Calm-weather odds: 6% · changed – in 24h
–
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to DEN?
On time or early
69%
15–30 min late
8%
30 min–1 hour late
9%
1–2 hours late
8%
Over 2 hours late
5%
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
↑
Cloud base down to 1,300 ft, 0.4 in of rain forecast at DCA that day
↑
1pm departures from DCA are often late
↓
Gusts to 28 kt forecast at DEN that day
↓
Sundays in October are usually quieter than average
Weather at each end
DCA (origin)
Gusts 9 kt Ceiling 1,300 ft Visibility 10+ mi Precip 0.40 in
DEN (destination)
Gusts 28 kt Ceiling none (clear) 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.