Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sun 4:00 PM ET · connections flying that day

Fri, Oct 9: Delta via Salt Lake City, leaving 06:00, is the safest bet: 87% chance of reaching Atlanta on time; the tightest one-ticket connections make it only 68% of the time.

Nonstops that day

All 2 nonstops →


DL 635 Delta Flight history →	BOI 23:10	ATL 05:16	18%	4%	0.7%	78%
DL 874 Delta Flight history →	BOI 14:03	ATL 20:19	19%	5%	0.6%	89%

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 2 h ahead of Boise). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	BOI 05:30 → MSP 09:10DL 2808	1h 22m Minneapolis	MSP 10:32 → ATL 14:04DL 1046	6h 34m	98%	87%
Delta Details →	BOI 06:00 → SLC 07:11DL 2173	59m Salt Lake City	SLC 08:10 → ATL 13:54DL 897	5h 54m	96%	87%
United Details →	BOI 05:00 → DEN 07:05UA 5924 · flown by SkyWest	2h 55m Denver	DEN 10:00 → ATL 15:09UA 2424	8h 09m	99%	86%
Southwest Details →	BOI 06:00 → LAS 06:45WN 701	1h 40m Las Vegas	LAS 08:25 → ATL 15:25WN 4482	7h 25m	100%	85%
Delta Details →	BOI 08:25 → SLC 09:44DL 3607 · flown by SkyWest	3h 51m Salt Lake City	SLC 13:35 → ATL 19:22DL 906	8h 57m	100%	84%
Delta Details →	BOI 18:42 → SLC 19:57DL 2920	3h 38m Salt Lake City	SLC 23:35 → ATL 05:14 +1DL 912	8h 32m	99%	84%
United Details →	BOI 06:30 → SFO 07:30UA 4678 · flown by SkyWest	1h 15m San Francisco	SFO 08:45 → ATL 16:48UA 702	8h 18m	97%	83%
Delta Details →	BOI 10:29 → MSP 14:11DL 2017	3h 07m Minneapolis	MSP 17:18 → ATL 21:05DL 1036	8h 36m	100%	82%
Tight connection: often missed
American Details →	BOI 15:54 → DFW 20:15AA 1531	55m Dallas-Fort Worth	DFW 21:10 → ATL 00:19 +1AA 2749	6h 25m	70%	48%
American Details →	BOI 13:57 → PHX 15:16AA 4948 · flown by SkyWest	55m Phoenix	PHX 16:11 → ATL 22:50AA 2391	6h 53m	68%	47%

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 Fri, Oct 9 (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