Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · 6 nonstops

Thu, Oct 8: AA 4642 at 06:00 is the safest bet, 6% chance of being 15+ min late; evening flights run 24–35%.

Safest bet that day AA 4642 CMH 06:00 → BOS 08:06 · 6% chance 15+ min late · usually 95% on time Riskiest MQ 3922 CMH 16:02 → BOS 18:08 · 35% chance 15+ min late

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 4642 American flown by Republic Flight history →	CMH 06:00	BOS 08:06	6%	2%	0.9%	95%
DL 5663 Delta flown by Republic Flight history →	CMH 06:13	BOS 08:20	6%	2%	0.9%	92%
DL 5654 Delta flown by Republic Flight history →	CMH 11:11	BOS 13:15	12%	4%	0.7%	87%
YX 4524 Republic	CMH 11:54	BOS 14:14	13%	7%	0.7%	no record
DL 5653 Delta flown by Republic Flight history →	CMH 17:40	BOS 19:50	24%	9%	0.8%	68%
MQ 3922 Envoy	CMH 16:02	BOS 18:08	35%	15%	0.6%	no record

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