Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sun 4:00 PM ET · 7 nonstops

Fri, Oct 9: UA 1977 at 07:30 is the safest bet, 7% chance of being 15+ min late; evening flights run 21–38%.

Safest bet that day UA 1977 IAH 07:30 → BOS 12:28 · 7% chance 15+ min late · usually 94% on time Riskiest B6 1632 IAH 18:31 → BOS 23:24 · 38% chance 15+ min late · usually 37% on time

Every nonstop on Fri, Oct 9

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.


UA 1977 United Flight history →	IAH 07:30	BOS 12:28	7%	3%	0.6%	94%
UA 2393 United Flight history →	IAH 09:50	BOS 14:48	13%	5%	0.6%	82%
UA 1957 United Flight history →	IAH 12:30	BOS 17:34	18%	8%	0.6%	61%
UA 521 United Flight history →	IAH 18:15	BOS 23:19	21%	7%	0.7%	68%
UA 2161 United Flight history →	IAH 16:40	BOS 21:44	21%	8%	0.7%	69%
B6 932 JetBlue Flight history →	IAH 13:14	BOS 18:10	33%	15%	0.7%	60%
B6 1632 JetBlue Flight history →	IAH 18:31	BOS 23:24	38%	17%	0.9%	37%

Alternatives with one stop that day

All connections →


Delta Details →	IAH 07:00 → ATL 10:04DL 1315	1h 06m Atlanta	ATL 11:10 → BOS 13:47DL 862	5h 47m	94%	83%
Delta Details →	IAH 05:30 → DTW 09:18DL 1389	47m Detroit	DTW 10:05 → BOS 12:00DL 2648	5h 30m	90%	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 Fri, Oct 9 (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