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Delta Air Lines / SLC → DEN

DL 1553 on time

Delta Air Lines 1553: Salt Lake City to Denver at 10:15 a.m.; Denver to Salt Lake City at 12:45 p.m. (past 12 months). Figures below the title are for SLC → DEN, its busiest leg

On time
78%
324 flights · likely 74–83%
Cancelled
0.3%
of scheduled flights
Typical arrival
−8 min
median vs schedule
When late
+45 min
average delay
Similar flights
77%
DL, same route & hour

About 1 in 5 DL 1553 flights from Salt Lake City arrived 15+ minutes late, diverted or cancelled over the past year (22%); 0.3% were cancelled. The typical flight landed 8 minutes early.

DL 1553: SLC → DEN

Scheduled to leave Salt Lake City at 10:15 a.m. local time. Over the past year it arrived on time 78% of the time (324 flights), in line with other DL flights on the route at that hour (77%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 77% on time (30 flights)77SepOct 2025: 72% on time (29 flights)72OctNov 2025: 93% on time (29 flights)93NovDec 2025: 80% on time (30 flights)80DecJan 2026: 81% on time (31 flights)81JanFeb 2026: 79% on time (28 flights)79FebMar 2026: too few flights (7 flights)MarApr 2026: 83% on time (18 flights)83AprMay 2026: 84% on time (31 flights)84MayJun 2026: 77% on time (30 flights)77JunJul 2026: 87% on time (30 flights)87JulAug 2026: 48% on time (31 flights)48Aug

By day of week

DayFlightsOn time
Monday4871%
Tuesday4777%
Wednesday4787%
Thursday4781%
Friday4473%
Saturday4785%
Sunday4475%

Why it was late

Airline (crew, maintenance, ops) 45%Air traffic & airport (NAS) 31%Severe weather 16%Late inbound plane 8%

All flights SLC → DEN · Connecting off DL 1553? Check the risk

DL 1553: DEN → SLC

Scheduled to leave Denver at 12:45 p.m. local time. Over the past year it arrived on time 78% of the time (253 flights), in line with other DL flights on the route at that hour (80%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Aug 2025: 90% on time (31 flights)90AugSep 2025: 87% on time (30 flights)87SepOct 2025: too few flights (5 flights)OctDec 2025: too few flights (12 flights)DecJan 2026: 81% on time (31 flights)81JanFeb 2026: 75% on time (28 flights)75FebMar 2026: too few flights (7 flights)MarApr 2026: 89% on time (18 flights)89AprMay 2026: 90% on time (31 flights)90MayJun 2026: 67% on time (30 flights)67JunJul 2026: 80% on time (30 flights)80JulAug 2026: 58% on time (31 flights)58Aug

By day of week

DayFlightsOn time
Monday3784%
Tuesday3675%
Wednesday3675%
Thursday3686%
Friday3672%
Saturday3786%
Sunday3569%

Why it was late

Late inbound plane 62%Airline (crew, maintenance, ops) 27%Air traffic & airport (NAS) 10%Severe weather 1%

All flights DEN → SLC · Connecting off DL 1553? Check the risk

Questions

How often is DL 1553 from SLC to DEN late?

Delta Air Lines 1553 from Salt Lake City, UT to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 22% of 324 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.

How often is DL 1553 from DEN to SLC late?

Delta Air Lines 1553 from Denver, CO to Salt Lake City, UT arrived 15 or more minutes late, was diverted or was cancelled on 22% of 253 scheduled flights between September 2025 and August 2026. 1.2% 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.