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Delta Air Lines / SJC → SLC

DL 1254 on time

Delta Air Lines 1254: San Jose to Salt Lake City at 1:40 p.m.; Salt Lake City to San Jose at 11:30 a.m. (past 12 months). Figures below the title are for SJC → SLC, its busiest leg

On time
93%
239 flights · likely 89–96%
Cancelled
0.0%
of scheduled flights
Typical arrival
−17 min
median vs schedule
When late
+87 min
average delay
Similar flights
92%
DL, same route & hour

About 1 in 15 DL 1254 flights from San Jose arrived 15+ minutes late, diverted or cancelled over the past year (7%); 0.0% were cancelled. The typical flight landed 17 minutes early.

DL 1254: SJC → SLC

Scheduled to leave San Jose at 1:40 p.m. local time. Over the past year it arrived on time 93% of the time (239 flights), in line with other DL flights on the route at that hour (92%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jan 2026: 93% on time (27 flights)93JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 87% on time (31 flights)87MarApr 2026: 100% on time (30 flights)100AprMay 2026: 94% on time (31 flights)94MayJun 2026: 97% on time (30 flights)97JunJul 2026: 94% on time (31 flights)94JulAug 2026: 94% on time (31 flights)94Aug

By day of week

DayFlightsOn time
Monday3594%
Tuesday3497%
Wednesday3491%
Thursday3497%
Friday3491%
Saturday3497%
Sunday3485%

Why it was late

Late inbound plane 65%Airline (crew, maintenance, ops) 34%Air traffic & airport (NAS) 1%

All flights SJC → SLC · Connecting off DL 1254? Check the risk

DL 1254: SLC → SJC

Scheduled to leave Salt Lake City at 11:30 a.m. local time. Over the past year it arrived on time 90% of the time (239 flights), better than other DL flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jan 2026: 81% on time (27 flights)81JanFeb 2026: 79% on time (28 flights)79FebMar 2026: 84% on time (31 flights)84MarApr 2026: 97% on time (30 flights)97AprMay 2026: 100% on time (31 flights)100MayJun 2026: 93% on time (30 flights)93JunJul 2026: 94% on time (31 flights)94JulAug 2026: 94% on time (31 flights)94Aug

By day of week

DayFlightsOn time
Monday3591%
Tuesday3494%
Wednesday3494%
Thursday3491%
Friday3491%
Saturday3485%
Sunday3485%

Why it was late

Airline (crew, maintenance, ops) 48%Late inbound plane 32%Air traffic & airport (NAS) 13%Severe weather 7%

All flights SLC → SJC · Connecting off DL 1254? Check the risk

Questions

How often is DL 1254 from SJC to SLC late?

Delta Air Lines 1254 from San Jose, CA to Salt Lake City, UT arrived 15 or more minutes late, was diverted or was cancelled on 7% of 239 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

How often is DL 1254 from SLC to SJC late?

Delta Air Lines 1254 from Salt Lake City, UT to San Jose, CA arrived 15 or more minutes late, was diverted or was cancelled on 10% of 239 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.