Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 14 nonstops

Wed, Oct 7: DL 400 at 07:10 is the safest bet, 10% chance of being 15+ min late; evening flights run 12–19%.

Safest bet that day DL 400 SFO 07:10 → BOS 15:55 · 10% chance 15+ min late · usually 89% on time Riskiest B6 1734 SFO 10:25 → BOS 19:12 · 38% chance 15+ min late · usually 70% on time

Every nonstop on Wed, Oct 7

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 400 Delta Flight history →	SFO 07:10	BOS 15:55	10%	4%	1.0%	89%
UA 796 United Flight history →	SFO 21:03	BOS 05:41	12%	4%	0.6%	87%
UA 1665 United Flight history →	SFO 23:05	BOS 08:01	13%	3%	0.7%	84%
B6 434 JetBlue Flight history →	SFO 07:47	BOS 16:45	15%	5%	1.4%	86%
UA 2647 United Flight history →	SFO 08:10	BOS 17:04	17%	6%	0.7%	82%
B6 134 JetBlue Flight history →	SFO 21:44	BOS 06:28	19%	7%	1.0%	65%
DL 860 Delta Flight history →	SFO 15:00	BOS 23:41	26%	11%	0.9%	37%
B6 1234 JetBlue	SFO 14:37	BOS 23:30	28%	14%	1.2%	no record
UA 1372 United Flight history →	SFO 12:25	BOS 21:21	30%	12%	0.8%	79%
UA 2634 United	SFO 14:12	BOS 23:06	30%	12%	0.8%	no record
DL 977 Delta Flight history →	SFO 12:20	BOS 21:02	33%	14%	1.0%	60%
B6 1034 JetBlue Flight history →	SFO 11:22	BOS 20:17	34%	14%	1.5%	54%
UA 2356 United Flight history →	SFO 10:05	BOS 18:59	36%	16%	0.8%	63%
B6 1734 JetBlue Flight history →	SFO 10:25	BOS 19:12	38%	15%	1.6%	70%

Alternatives with one stop that day

All connections →


Delta Details →	SFO 05:50 → SLC 08:40DL 1331	1h 10m Salt Lake City	SLC 09:50 → BOS 16:36DL 657	7h 46m	98%	78%
Delta Details →	SFO 18:07 → LAX 19:32DL 1559	1h 28m Los Angeles	LAX 21:00 → BOS 05:30 +1DL 507	8h 23m	92%	78%
United Details →	SFO 00:01 → EWR 08:46UA 2416	1h 14m Newark	EWR 10:00 → BOS 11:16UA 375	8h 15m	95%	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 Wed, Oct 7 (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