Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · 4 nonstops

Sun, Oct 11: F9 685 at 07:00 is the safest bet, 10% chance of being 15+ min late; evening flights run 34–36%.

Safest bet that day F9 685 DCA 07:00 → DEN 09:01 · 10% chance 15+ min late · usually 86% on time Riskiest UA 746 DCA 16:13 → DEN 18:25 · 36% chance 15+ min late · usually 80% on time

Every nonstop on Sun, Oct 11

12-month record →

Ranked by the chance of arriving 15+ minutes late (typical odds: the weather this date has had in past years), with each flight’s on-time record over Aug 2025 – Jul 2026 beside it. Times are local. Pick a flight for its forecast. Click a column to sort.


F9 685 Frontier Flight history →	DCA 07:00	DEN 09:01	10%	4%	0.9%	86%
F9 687 Frontier Flight history →	DCA 13:59	DEN 15:53	26%	10%	1.0%	84%
F9 689 Frontier Flight history →	DCA 18:00	DEN 20:07	34%	13%	1.2%	68%
UA 746 United Flight history →	DCA 16:13	DEN 18:25	36%	12%	0.9%	80%worse than usual

Alternatives with one stop that day

All connections →


Delta Details →	DCA 06:00 → DTW 07:29DL 2869	1h 11m Detroit	DTW 08:40 → DEN 09:47DL 1113	5h 47m	96%	86%
American Details →	DCA 06:27 → ORD 07:35AA 523	47m Chicago	ORD 08:22 → DEN 10:18AA 1225	5h 51m	87%	70%
United Details →	DCA 06:30 → ORD 07:46UA 1793	51m Chicago	ORD 08:37 → DEN 10:11UA 318	5h 41m	89%	68%

How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); flights of airlines we don’t forecast yet use their 12-month record and are marked. Makes the connection: the first flight’s 12-month lateness curve, scaled so its chance of arriving 15+ min late matches the day’s forecast, at the layover minus the 45-minute minimum (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled × second flight within 15 minutes, each from the day’s forecast.

About this data: forecast odds from our model for Sun, Oct 11 (newest published update); 12-month records from US DOT on-time data, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. JSON