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Delta Air Lines / DTW → SAN

DL 492 on time

Delta Air Lines 492: Detroit to San Diego at 8:40 a.m.; San Diego to Detroit at 11:37 a.m. (past 12 months). Figures below the title are for DTW → SAN, its busiest leg

On time
82%
365 flights · likely 78–86%
Cancelled
0.8%
of scheduled flights
Typical arrival
−4 min
median vs schedule
When late
+56 min
average delay
Similar flights
82%
DL, same route & hour

About 1 in 6 DL 492 flights from Detroit arrived 15+ minutes late, diverted or cancelled over the past year (18%); 0.8% were cancelled. The typical flight landed 4 minutes early.

DL 492: DTW → SAN

Scheduled to leave Detroit at 8:40 a.m. local time. Over the past year it arrived on time 82% of the time (365 flights), in line with other DL flights on the route at that hour (82%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 77% on time (30 flights)77SepOct 2025: 97% on time (31 flights)97OctNov 2025: 73% on time (30 flights)73NovDec 2025: 71% on time (31 flights)71DecJan 2026: 68% on time (31 flights)68JanFeb 2026: 82% on time (28 flights)82FebMar 2026: 87% on time (31 flights)87MarApr 2026: 83% on time (30 flights)83AprMay 2026: 90% on time (31 flights)90MayJun 2026: 90% on time (30 flights)90JunJul 2026: 77% on time (31 flights)77JulAug 2026: 87% on time (31 flights)87Aug

By day of week

DayFlightsOn time
Monday5387%
Tuesday5283%
Wednesday5281%
Thursday5287%
Friday5277%
Saturday5281%
Sunday5279%

Why it was late

Airline (crew, maintenance, ops) 63%Air traffic & airport (NAS) 33%Late inbound plane 3%Severe weather 1%

All flights DTW → SAN · Connecting off DL 492? Check the risk

DL 492: SAN → DTW

Scheduled to leave San Diego at 11:37 a.m. local time. Over the past year it arrived on time 80% of the time (288 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: 55% on time (31 flights)55AugSep 2025: 80% on time (30 flights)80SepOct 2025: 94% on time (31 flights)94OctNov 2025: 69% on time (29 flights)69NovDec 2025: 63% on time (19 flights)63DecJan 2026: 81% on time (27 flights)81JanFeb 2026: 79% on time (28 flights)79FebMar 2026: too few flights (7 flights)MarMay 2026: 88% on time (25 flights)88MayJun 2026: 80% on time (30 flights)80JunJul 2026: 68% on time (31 flights)68JulAug 2026: 90% on time (31 flights)90Aug

By day of week

DayFlightsOn time
Monday4286%
Tuesday4193%
Wednesday4178%
Thursday4180%
Friday4274%
Saturday4168%
Sunday4080%

Why it was late

Late inbound plane 51%Airline (crew, maintenance, ops) 32%Air traffic & airport (NAS) 16%

All flights SAN → DTW · Connecting off DL 492? Check the risk

Questions

How often is DL 492 from DTW to SAN late?

Delta Air Lines 492 from Detroit, MI to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 365 scheduled flights between September 2025 and August 2026. 0.8% were cancelled.

How often is DL 492 from SAN to DTW late?

Delta Air Lines 492 from San Diego, CA to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 20% of 288 scheduled flights between September 2025 and August 2026. 1.0% 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.