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 9–13% likely to arrive 15+ min late.

Nonstops that day

All 2 nonstops →


DL 409 Delta	ONT 07:05	ATL 14:12	9%	2%	0.8%	no record
DL 665 Delta Flight history →	ONT 12:00	ATL 19:29	13%	4%	2.0%	85%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	ONT 06:00 → SLC 08:48DL 2708	1h 07m Salt Lake City	SLC 09:55 → ATL 15:39DL 835	6h 39m	96%	83%
Delta Details →	ONT 18:01 → SEA 20:50DL 4031 · flown by SkyWest	2h 17m Seattle	SEA 23:07 → ATL 07:03 +1DL 567	10h 02m	97%	81%
United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 57m Denver	DEN 10:17 → ATL 15:23UA 2806	7h 23m	99%	80%
Delta Details →	ONT 06:20 → SEA 09:15DL 3816 · flown by SkyWest	2h 44m Seattle	SEA 11:59 → ATL 20:04DL 554	10h 44m	98%	72%
United Details →	ONT 06:49 → ORD 12:53UA 2226	1h 02m Chicago	ORD 13:55 → ATL 17:10UA 356	7h 21m	90%	70%
American Details →	ONT 05:34 → DFW 10:41AA 1412	2h 44m Dallas-Fort Worth	DFW 13:25 → ATL 16:43AA 2398	8h 09m	98%	66%
American Details →	ONT 08:24 → DFW 13:36AA 2893	2h 30m Dallas-Fort Worth	DFW 16:06 → ATL 19:26AA 2403	8h 02m	95%	55%
American Details →	ONT 13:03 → PHX 14:31AA 2661	1h 40m Phoenix	PHX 16:11 → ATL 22:50AA 2391	6h 47m	90%	55%

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