Wednesday, October 7 · our forecast odds · issued Mon 10:00 AM ET · connections flying that day

Wed, Oct 7 looks like a normal day here: all 2 nonstops are 4–6% likely to arrive 15+ min late.

Nonstops that day


DL 409 Delta	ONT 07:02	ATL 14:11	4%	2%	0.6%	no record
DL 665 Delta Flight history →	ONT 11:48	ATL 19:15	6%	2%	0.6%	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.


United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 48m Denver	DEN 10:08 → ATL 15:15UA 2806	7h 15m	99%	90%
Delta Details →	ONT 06:00 → SLC 08:48DL 2708	1h 07m Salt Lake City	SLC 09:55 → ATL 15:39DL 835	6h 39m	97%	89%
Delta Details →	ONT 18:01 → SEA 20:50DL 4031 · flown by SkyWest	2h 24m Seattle	SEA 23:14 → ATL 07:12 +1DL 567	10h 11m	99%	89%
American Details →	ONT 05:34 → DFW 10:41AA 1412	1h 21m Dallas-Fort Worth	DFW 12:02 → ATL 15:31AA 1008	6h 57m	96%	85%
United Details →	ONT 06:59 → ORD 13:00UA 2226	55m Chicago	ORD 13:55 → ATL 17:10UA 356	7h 11m	90%	83%
Frontier Details →	ONT 06:00 → DEN 09:24F9 1500	3h 12m Denver	DEN 12:36 → ATL 17:55F9 3600	8h 55m	98%	83%
American Details →	ONT 08:26 → DFW 13:41AA 2893	3h 26m Dallas-Fort Worth	DFW 17:07 → ATL 20:35AA 2403	9h 09m	98%	81%
Delta Details →	ONT 06:20 → SEA 09:15DL 3816 · flown by SkyWest	2h 44m Seattle	SEA 11:59 → ATL 20:04DL 554	10h 44m	99%	81%

How these are worked out. Each flight’s odds are our forecast for that day; 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 Wed, Oct 7 (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