Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 3990
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
F9 3990 · DFW → DTW
departs 2:29 PM CT · arrives 6:15 PM ET
Forecast issued Thu 4:00 PM ET · 48h before departure
Watch this flight
Other days
Today 69%
Fri 10/2 46%
Sat 10/3
Sun 10/4 30%
Mon 10/5 28%
Tue 10/6 17%
Wed 10/7 20%
Odds over time
Arrive at DTW more than 15 minutes late?
34%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
34%
Leave 15+ late
42%
Arrive 1h+ late
13%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
4.7d
Now
1d
12h
6h
Departs
Lands
Arrive at DTW more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
34%
Yes 34%
No 66%
Leave DFW more than 15 minutes late?
Calm-weather odds: 22% · changed +4 pts in 24h
+4 pts
42%
Yes 42%
No 58%
Arrive at DTW more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to DTW?
On time or early
65%
15–30 min late
12%
30 min–1 hour late
9%
1–2 hours late
7%
Over 2 hours late
6%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, 0.4 in of rain forecast at DFW that day
↑
2pm departures from DFW are often late
↑
F9's recent on-time record
↓
Mostly benign weather forecast at DTW
↓
DTW usually runs smoothly
Weather at each end
DFW (origin)
Gusts 14 kt Ceiling 500 ft Visibility 4 mi Precip 0.35 in
DTW (destination)
Gusts 10 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.