Wednesday, October 7 · our forecast odds · issued Mon 9:00 PM ET · connections flying that day

Wed, Oct 7: Southwest via Denver, leaving 07:05, is the safest bet: 85% chance of reaching Ontario on time.

Nonstops that day


DL 665 Delta Flight history →	ATL 09:21	ONT 10:38	8%	2%	0.6%	85%
DL 2891 Delta Flight history →	ATL 19:01	ONT 20:49	15%	4%	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 18:00 → SLC 20:02DL 653	2h 57m Salt Lake City	SLC 22:59 → ONT 23:48DL 1614	8h 48m	99%	91%
Delta Details →	ATL 08:15 → SLC 10:14DL 830	1h 02m Salt Lake City	SLC 11:16 → ONT 12:16DL 1173	7h 01m	96%	90%
Southwest Details →	ATL 07:27 → LAS 08:24WN 212	3h 15m Las Vegas	LAS 11:39 → ONT 12:46WN 955	8h 19m	100%	88%
American Details →	ATL 08:22 → DFW 09:55AA 1567	2h 13m Dallas-Fort Worth	DFW 12:08 → ONT 13:31AA 2635	8h 09m	98%	88%
Delta Details →	ATL 14:38 → SEA 16:49DL 481	3h 10m Seattle	SEA 19:59 → ONT 22:52DL 3884 · flown by SkyWest	11h 14m	100%	87%
United Details →	ATL 08:46 → DEN 10:14UA 340	1h 11m Denver	DEN 11:25 → ONT 12:47UA 430	7h 01m	96%	86%
Southwest Details →	ATL 07:05 → DEN 08:07WN 204	52m Denver	DEN 08:59 → ONT 10:22WN 4794	6h 17m	88%	85%
American Details →	ATL 07:48 → PHX 09:00AA 1777	1h 49m Phoenix	PHX 10:49 → ONT 12:19AA 2661	7h 31m	96%	84%

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