Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · connections flying that day

Thu, Oct 8 looks like a normal day here: all 2 nonstops are 10–20% likely to arrive 15+ min late.

Nonstops that day

All 2 nonstops →


DL 665 Delta Flight history →	ATL 09:21	ONT 10:38	10%	3%	0.6%	85%
DL 2891 Delta Flight history →	ATL 17:05	ONT 18:30	20%	6%	0.6%	50%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Ontario on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Ontario is 3 h behind Atlanta). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	ATL 08:15 → SLC 10:14DL 830	1h 03m Salt Lake City	SLC 11:17 → ONT 12:12DL 1173	6h 57m	95%	88%
Delta Details →	ATL 09:50 → SEA 12:13DL 774	2h 17m Seattle	SEA 14:30 → ONT 17:21DL 4031 · flown by SkyWest	10h 31m	99%	85%
American Details →	ATL 07:48 → PHX 09:00AA 1777	1h 56m Phoenix	PHX 10:56 → ONT 12:29AA 2661	7h 41m	96%	82%
American Details →	ATL 06:01 → DFW 07:33AA 2770	3h 16m Dallas-Fort Worth	DFW 10:49 → ONT 12:10AA 2956	9h 09m	99%	82%
American Details →	ATL 08:22 → DFW 09:55AA 1567	2h 20m Dallas-Fort Worth	DFW 12:15 → ONT 13:42AA 2635	8h 20m	97%	81%
United Details →	ATL 08:53 → DEN 10:28UA 340	57m Denver	DEN 11:25 → ONT 12:47UA 430	6h 54m	87%	75%
United Details →	ATL 06:30 → SFO 08:35UA 571	2h 05m San Francisco	SFO 10:40 → ONT 12:12UA 2661	8h 42m	98%	75%
JetBlue Details →	ATL 14:15 → JFK 16:40B6 120	3h 00m New York	JFK 19:40 → ONT 22:44B6 355	11h 29m	100%	69%

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