Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 8:00 PM ET · 14 nonstops

Sun, Oct 11: DL 1646 at 07:00 is the safest bet, 8% chance of being 15+ min late; evening flights run 22–38%.

Safest bet that day DL 1646 ATL 07:00 → DTW 08:55 · 8% chance 15+ min late · usually 92% on time Riskiest F9 1264 ATL 22:35 → DTW 00:40 · 38% chance 15+ min late · usually 72% 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.


DL 1646 Delta Flight history →	ATL 07:00	DTW 08:55	8%	2%	0.7%	92%
DL 643 Delta	ATL 08:23	DTW 10:19	11%	2%	0.6%	no record
DL 1240 Delta Flight history →	ATL 11:00	DTW 12:56	14%	3%	0.7%	85%
DL 1298 Delta Flight history →	ATL 09:20	DTW 11:10	15%	3%	0.7%	87%
DL 1031 Delta Flight history →	ATL 14:00	DTW 15:55	17%	4%	0.7%	85%
DL 1005 Delta Flight history →	ATL 15:28	DTW 17:27	22%	5%	0.7%	79%
DL 1478 Delta Flight history →	ATL 18:11	DTW 20:13	22%	6%	0.7%	76%
DL 2940 Delta Flight history →	ATL 22:59	DTW 00:59	24%	6%	0.7%	73%
F9 2898 Frontier Flight history →	ATL 11:29	DTW 13:33	24%	9%	0.8%	65%
DL 2067 Delta Flight history →	ATL 17:11	DTW 19:14	25%	6%	0.7%	76%
DL 1262 Delta Flight history →	ATL 19:11	DTW 21:11	26%	7%	0.7%	69%
DL 1232 Delta Flight history →	ATL 20:30	DTW 22:33	27%	7%	0.7%	68%
DL 651 Delta Flight history →	ATL 21:45	DTW 23:44	27%	6%	0.7%	78%
F9 1264 Frontier Flight history →	ATL 22:35	DTW 00:40	38%	14%	0.9%	72%

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