Tuesday, October 6 · our forecast odds · issued Mon 4:00 PM ET · connections flying that day

Tomorrow looks like a normal day here: all 2 nonstops are 9–18% likely to arrive 15+ min late.

Nonstops that day


DL 665 Delta Flight history →	ATL 09:21	ONT 10:38	9%	2%	0.6%	85%
DL 2891 Delta Flight history →	ATL 18:55	ONT 20:41	18%	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 08:15 → SLC 10:14DL 830	1h 32m Salt Lake City	SLC 11:46 → ONT 12:45DL 2743	7h 30m	98%	91%
Delta Details →	ATL 18:00 → SLC 20:02DL 653	2h 57m Salt Lake City	SLC 22:59 → ONT 23:48DL 1614	8h 48m	99%	90%
Southwest Details →	ATL 08:31 → BNA 08:37WN 186	3h 38m Nashville	BNA 12:15 → ONT 14:27WN 4586	8h 56m	100%	88%
Southwest Details →	ATL 09:45 → HOU 11:00WN 241	2h 25m Houston	HOU 13:25 → ONT 14:50WN 4965	8h 05m	99%	87%
Southwest Details →	ATL 07:07 → DEN 08:16WN 204	1h 07m Denver	DEN 09:23 → ONT 10:45WN 4794	6h 38m	93%	85%
Southwest Details →	ATL 07:17 → LAS 08:32WN 212	1h 09m Las Vegas	LAS 09:41 → ONT 10:52WN 2362	6h 35m	95%	83%
Frontier Details →	ATL 10:43 → DFW 12:18F9 1269	3h 24m Dallas-Fort Worth	DFW 15:42 → ONT 17:08F9 4689	9h 25m	97%	83%
United Details →	ATL 08:50 → DEN 10:24UA 340	1h 01m Denver	DEN 11:25 → ONT 12:47UA 430	6h 57m	92%	83%

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 Tue, Oct 6 (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