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 looks like a normal day here: all 4 nonstops are 6–13% likely to arrive 15+ min late.

Safest bet that day DL 3996 IAD 06:00 → MSP 07:53 · 6% chance 15+ min late · usually 91% on time Riskiest DL 3783 IAD 18:46 → MSP 20:56 · 13% 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.


DL 3996 Delta flown by SkyWest Flight history →	IAD 06:00	MSP 07:53	6%	5%	0.6%	91%
UA 2604 United	IAD 08:50	MSP 10:41	7%	4%	0.6%	no record
DL 3699 Delta flown by SkyWest Flight history →	IAD 11:35	MSP 13:35	8%	5%	0.7%	87%
DL 3783 Delta flown by SkyWest Flight history →	IAD 18:46	MSP 20:56	13%	8%	0.8%	80%

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