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Delta Air Lines / TWF → SLC

DL 4323 on time

Delta Air Lines 4323: Twin Falls to Salt Lake City at 11:35 a.m.; Salt Lake City to Twin Falls at 9:45 a.m. (past 12 months). Figures below the title are for TWF → SLC, its busiest leg

On time
96%
177 flights · likely 92–98%
Cancelled
0.0%
of scheduled flights
Typical arrival
−13 min
median vs schedule
When late
+95 min
average delay
Similar flights
96%
DL, same route & hour

About 1 in 25 DL 4323 flights from Twin Falls arrived 15+ minutes late, diverted or cancelled over the past year (4%); 0.0% were cancelled. The typical flight landed 13 minutes early.

DL 4323: TWF → SLC

Scheduled to leave Twin Falls at 11:35 a.m. local time, operated by SkyWest as OO 4323. Over the past year it arrived on time 96% of the time (177 flights), in line with other DL flights on the route at that hour (96%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: 100% on time (24 flights)100MarApr 2026: 93% on time (30 flights)93AprMay 2026: 97% on time (31 flights)97MayJun 2026: 93% on time (30 flights)93JunJul 2026: 97% on time (31 flights)97JulAug 2026: 97% on time (31 flights)97Aug

By day of week

DayFlightsOn time
Monday2696%
Tuesday25100%
Wednesday25100%
Thursday2592%
Friday2592%
Saturday2592%
Sunday26100%

Why it was late

Airline (crew, maintenance, ops) 97%Air traffic & airport (NAS) 3%

All flights TWF → SLC · Connecting off DL 4323? Check the risk

DL 4323: SLC → TWF

Scheduled to leave Salt Lake City at 9:45 a.m. local time, operated by SkyWest as OO 4323. Over the past year it arrived on time 93% of the time (177 flights), in line with other DL flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: 100% on time (24 flights)100MarApr 2026: 90% on time (30 flights)90AprMay 2026: 94% on time (31 flights)94MayJun 2026: 87% on time (30 flights)87JunJul 2026: 100% on time (31 flights)100JulAug 2026: 90% on time (31 flights)90Aug

By day of week

DayFlightsOn time
Monday2696%
Tuesday25100%
Wednesday2592%
Thursday2592%
Friday2584%
Saturday2588%
Sunday26100%

Why it was late

Airline (crew, maintenance, ops) 85%Air traffic & airport (NAS) 12%Severe weather 3%

All flights SLC → TWF · Connecting off DL 4323? Check the risk

Questions

How often is DL 4323 from TWF to SLC late?

Delta Air Lines 4323 from Twin Falls, ID to Salt Lake City, UT arrived 15 or more minutes late, was diverted or was cancelled on 4% of 177 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

How often is DL 4323 from SLC to TWF late?

Delta Air Lines 4323 from Salt Lake City, UT to Twin Falls, ID arrived 15 or more minutes late, was diverted or was cancelled on 7% of 177 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.