Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sat 8:00 PM ET · 25 nonstops

Fri, Oct 9: WN 2399 at 05:10 is the safest bet, 5% chance of being 15+ min late; evening flights run 11–37%.

Safest bet that day WN 2399 LAX 05:10 → HOU 10:30 · 5% chance 15+ min late · usually 88% on time Riskiest WN 4858 LAX 18:50 → HOU 00:10 · 37% chance 15+ min late · usually 23% 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.


WN 2399 Southwest Flight history →	LAX 05:10	HOU 10:30	5%	1%	1.3%	88%
UA 654 United Flight history →	LAX 05:45	IAH 11:12	5%	2%	0.7%	96%
UA 1936 United Flight history →	ONT 05:45	IAH 11:04	5%	2%	0.8%	91%
UA 700 United Flight history →	SNA 07:45	IAH 13:07	8%	3%	0.7%	93%
UA 491 United Flight history →	LAX 00:51	IAH 06:12	8%	2%	0.7%	92%
UA 1397 United Flight history →	LAX 07:05	IAH 12:34	8%	3%	0.7%	94%
UA 1416 United Flight history →	LAX 08:10	IAH 13:40	11%	3%	0.7%	91%
UA 387 United Flight history →	LAX 19:21	IAH 00:50	11%	5%	0.6%	91%
WN 2483 Southwest Flight history →	LGB 08:50	HOU 14:05	12%	4%	1.3%	88%
UA 277 United Flight history →	LAX 10:10	IAH 15:40	13%	4%	0.7%	88%
UA 643 United Flight history →	SNA 15:05	IAH 20:27	13%	4%	0.7%	87%
UA 2086 United Flight history →	LAX 11:54	IAH 17:22	13%	5%	0.7%	86%
UA 2377 United Flight history →	LAX 15:20	IAH 20:49	13%	5%	0.7%	87%
UA 2403 United Flight history →	LAX 17:45	IAH 23:14	13%	6%	0.6%	82%
UA 1591 United Flight history →	LAX 13:10	IAH 18:39	16%	6%	0.7%	73%
UA 2050 United Flight history →	SNA 11:58	IAH 17:20	17%	5%	0.7%	64%
WN 4868 Southwest Flight history →	ONT 09:40	HOU 14:50	17%	3%	1.2%	69%
DL 1143 Delta Flight history →	LAX 09:40	IAH 15:04	17%	4%	0.8%	86%
F9 2412 Frontier Flight history →	ONT 09:32	IAH 14:52	18%	5%	1.0%	79%
AA 5005 American flown by SkyWest Flight history →	LAX 14:11	IAH 19:43	18%	7%	0.6%	77%
DL 1287 Delta Flight history →	LAX 18:35	IAH 23:59	20%	7%	0.7%	85%
WN 2402 Southwest Flight history →	LAX 23:40	HOU 05:00	29%	8%	0.6%	67%
F9 1756 Frontier Flight history →	LAX 18:25	IAH 23:56	32%	14%	0.9%	70%
WN 3225 Southwest Flight history →	LAX 14:10	HOU 19:35	34%	10%	0.7%	24%
WN 4858 Southwest Flight history →	LAX 18:50	HOU 00:10	37%	10%	0.7%	23%

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