Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 8:00 PM ET · connections flying that day

Sat, Oct 10: Delta via Atlanta, leaving 07:30, is the safest bet: 83% chance of reaching Denver on time.

Nonstops that day

All 1 nonstop →


UA 1368 United Flight history →	SJU 13:40	DEN 18:15	14%	4%	0.6%	87%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Denver is 2 h behind San Juan). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	SJU 07:30 → ATL 11:14DL 1763	1h 41m Atlanta	ATL 12:55 → DEN 14:00DL 957	8h 30m	98%	83%
United Details →	SJU 16:55 → IAD 20:56UA 2024	1h 27m Dulles	IAD 22:23 → DEN 00:30 +1UA 495	9h 35m	94%	83%
United Details →	SJU 07:00 → IAH 10:53UA 1644	1h 40m Houston	IAH 12:33 → DEN 14:17UA 2168	9h 17m	98%	83%
JetBlue Details →	SJU 05:01 → JFK 08:54B6 2904	3h 16m New York	JFK 12:10 → DEN 14:37B6 1497	11h 36m	99%	81%
United Details →	SJU 01:00 → EWR 05:10UA 2219	2h 40m Newark	EWR 07:50 → DEN 10:09UA 1758	11h 09m	94%	78%
Delta Details →	SJU 12:54 → ATL 16:43DL 1930	2h 42m Atlanta	ATL 19:25 → DEN 20:43DL 746	9h 49m	100%	77%
United Details →	SJU 14:55 → IAH 18:51UA 668	1h 19m Houston	IAH 20:10 → DEN 21:29UA 685	8h 34m	93%	74%
United Details →	SJU 15:56 → ORD 20:15UA 2088	1h 36m Chicago	ORD 21:51 → DEN 23:23UA 767	9h 27m	95%	68%

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 Sat, Oct 10 (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