tailodds FORECAST
Tickets
Any day
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 looks like a normal day here: all 2 nonstops are 4–8% likely to arrive 15+ min late.

Nonstops that day

All 2 nonstops →
DL 3940 Delta flown by SkyWest Flight history → COS 08:10 SLC 10:09 4% 3% 0.6% 96%
DL 4449 Delta flown by SkyWest Flight history → COS 18:16 SLC 20:09 8% 4% 0.6% 91%

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. Layovers up to 4 hours. Pick a connection for its 12-month details.
SouthwestDetails → COS 05:45 → DEN 06:45WN 1220 1h 00m Denver DEN 07:45 → SLC 09:20WN 452 3h 35m 97% 91%
UnitedDetails → COS 05:30 → DEN 06:35UA 4697 · flown by SkyWest 1h 25m Denver DEN 08:00 → SLC 09:37UA 497 4h 07m 98% 90%
UnitedDetails → COS 07:05 → DEN 08:10UA 4696 · flown by SkyWest 3h 30m Denver DEN 11:40 → SLC 13:13UA 1963 6h 08m 100% 84%
UnitedDetails → COS 11:31 → DEN 12:45UA 4675 · flown by SkyWest 3h 44m Denver DEN 16:29 → SLC 18:10UA 5261 · flown by SkyWest 6h 39m 99% 81%
UnitedDetails → COS 08:45 → DEN 10:02UA 4725 · flown by SkyWest 3h 38m Denver DEN 13:40 → SLC 15:13UA 1840 6h 28m 99% 79%
UnitedDetails → COS 17:07 → DEN 18:20UA 4719 · flown by SkyWest 2h 45m Denver DEN 21:05 → SLC 22:44UA 5646 · flown by SkyWest 5h 37m 96% 78%
UnitedDetails → COS 13:30 → DEN 14:24UA 730 3h 21m Denver DEN 17:45 → SLC 19:25UA 5762 · flown by SkyWest 5h 55m 97% 77%
SouthwestDetails → COS 16:55 → DEN 17:45WN 1222 3h 10m Denver DEN 20:55 → SLC 22:40WN 1737 5h 45m 98% 71%
Tight connection: often missed
SouthwestDetails → COS 21:05 → PHX 21:55WN 1231 55m Phoenix PHX 22:50 → SLC 01:30 +1WN 849 4h 25m 66% 44%
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