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 looks like a normal day here: all 2 nonstops are 15–24% likely to arrive 15+ min late.

Nonstops that day

All 2 nonstops →


DL 665 Delta Flight history →	ATL 09:21	ONT 10:38	15%	4%	0.6%	85%
DL 2891 Delta Flight history →	ATL 17:05	ONT 18:30	24%	8%	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 10m Salt Lake City	SLC 11:24 → ONT 12:22DL 1173	7h 07m	93%	85%
Delta Details →	ATL 09:50 → SEA 12:13DL 774	2h 17m Seattle	SEA 14:30 → ONT 17:21DL 4031 · flown by SkyWest	10h 31m	98%	82%
Delta Details →	ATL 14:28 → SEA 16:43DL 481	3h 16m Seattle	SEA 19:59 → ONT 22:52DL 3884 · flown by SkyWest	11h 24m	99%	80%
Delta Details →	ATL 17:55 → SLC 19:56DL 653	1h 39m Salt Lake City	SLC 21:35 → ONT 22:23DL 1614	7h 28m	92%	79%
United Details →	ATL 08:45 → DEN 10:06UA 340	1h 19m Denver	DEN 11:25 → ONT 12:47UA 430	7h 02m	92%	79%
American Details →	ATL 07:48 → PHX 09:00AA 1777	1h 46m Phoenix	PHX 10:46 → ONT 12:12AA 2661	7h 24m	93%	76%
American Details →	ATL 06:01 → DFW 07:33AA 2770	3h 07m Dallas-Fort Worth	DFW 10:40 → ONT 11:56AA 2956	8h 55m	98%	72%
American Details →	ATL 08:22 → DFW 09:55AA 1567	2h 25m Dallas-Fort Worth	DFW 12:20 → ONT 13:34AA 2635	8h 12m	95%	71%

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