Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · 3 nonstops

Thu, Oct 8: AA 4549 at 06:00 is the safest bet, 7% chance of being 15+ min late; the others run 11–21%.

Safest bet that day AA 4549 SDF 06:00 → DCA 07:50 · 7% chance 15+ min late · usually 91% on time Riskiest AA 5602 SDF 18:01 → DCA 19:56 · 21% chance 15+ min late · usually 77% on time

Every nonstop on Thu, Oct 8

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.


AA 4549 American flown by Republic Flight history →	SDF 06:00	DCA 07:50	7%	2%	0.8%	91%
YX 4802 Republic	SDF 11:09	DCA 13:04	11%	4%	0.6%	no record
AA 5602 American flown by PSA Flight history →	SDF 18:01	DCA 19:56	21%	10%	1.9%	77%

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 Thu, Oct 8 (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