Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · connections flying that day

Wed, Oct 7: Delta via Minneapolis, leaving 11:35, is the safest bet: 82% chance of reaching Salt Lake City on time.

Nonstops that day

All 2 nonstops →


DL 432 Delta Flight history →	IAD 07:15	SLC 09:54	6%	2%	0.8%	85%
UA 2410 United Flight history →	IAD 17:50	SLC 20:46	22%	5%	0.7%	80%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Salt Lake City is 2 h behind Dulles). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	IAD 06:00 → ATL 07:43DL 2127	2h 27m Atlanta	ATL 10:10 → SLC 12:10DL 387	8h 10m	98%	91%
Delta Details →	IAD 08:27 → ATL 10:18DL 3080	3h 37m Atlanta	ATL 13:55 → SLC 15:51DL 423	9h 24m	99%	88%
Frontier Details →	IAD 06:01 → LAS 08:06F9 4277	1h 49m Las Vegas	LAS 09:55 → SLC 12:30F9 3016	8h 29m	96%	88%
United Details →	IAD 12:40 → SFO 15:27UA 1434	3h 18m San Francisco	SFO 18:45 → SLC 21:45UA 5590 · flown by SkyWest	11h 05m	98%	87%
Delta Details →	IAD 12:37 → ATL 14:28DL 1444	3h 32m Atlanta	ATL 18:00 → SLC 20:02DL 653	9h 25m	99%	86%
United Details →	IAD 15:56 → DEN 18:03UA 395	3h 02m Denver	DEN 21:05 → SLC 22:44UA 5646 · flown by SkyWest	8h 48m	97%	86%
Delta Details →	IAD 10:21 → ATL 12:05DL 1324	3h 15m Atlanta	ATL 15:20 → SLC 17:18DL 526	8h 57m	98%	86%
Delta Details →	IAD 07:00 → SEA 09:45DL 1015	3h 45m Seattle	SEA 13:30 → SLC 16:40DL 1120	11h 40m	99%	84%

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 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