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Delta Air Lines / DTW → AZO

DL 3919 on time

Delta Air Lines 3919: Detroit to Kalamazoo at 4:19 p.m.; Kalamazoo to Detroit at 6:00 p.m. (past 12 months). Figures below the title are for DTW → AZO, its busiest leg

On time
66%
210 flights · likely 60–72%
Cancelled
1.4%
of scheduled flights
Typical arrival
−5 min
median vs schedule
When late
+98 min
average delay
Similar flights
71%
DL, same route & hour

About 1 in 3 DL 3919 flights from Detroit arrived 15+ minutes late, diverted or cancelled over the past year (34%); 1.4% were cancelled. The typical flight landed 5 minutes early.

DL 3919: DTW → AZO

Scheduled to leave Detroit at 4:19 p.m. local time, operated by SkyWest as OO 3919. Over the past year it arrived on time 66% of the time (210 flights), worse than other DL flights on the route at that hour (71%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%May 2025: 88% on time (26 flights)88MayJun 2025: too few flights (6 flights)JunNov 2025: too few flights (2 flights)NovDec 2025: too few flights (2 flights)DecJan 2026: 48% on time (25 flights)48JanFeb 2026: 58% on time (26 flights)58FebMar 2026: 50% on time (28 flights)50MarApr 2026: too few flights (10 flights)AprMay 2026: 84% on time (25 flights)84MayJun 2026: 87% on time (30 flights)87JunJul 2026: 61% on time (31 flights)61JulAug 2026: 71% on time (31 flights)71Aug

By day of week

DayFlightsOn time
Monday3063%
Tuesday3063%
Wednesday3073%
Thursday3168%
Friday3161%
Saturday3063%
Sunday2871%

Why it was late

Airline (crew, maintenance, ops) 69%Severe weather 24%Air traffic & airport (NAS) 7%

All flights DTW → AZO · Connecting off DL 3919? Check the risk

DL 3919: AZO → DTW

Scheduled to leave Kalamazoo at 6:00 p.m. local time, operated by SkyWest as OO 3919. Over the past year it arrived on time 69% of the time (183 flights), in line with other DL flights on the route at that hour (72%). Last seen in the data Aug 31, 2026.

Usually Delta Air Lines's last flight of the day from Kalamazoo to Detroit (100% of days). Delta Air Lines's last AZO–DTW flight was cancelled 2.2% of the time, against 2.6% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 5:27 a.m. the next morning.

Month by month

40%70%100%May 2025: 90% on time (30 flights)90MayJun 2025: too few flights (7 flights)JunNov 2025: too few flights (2 flights)NovDec 2025: too few flights (2 flights)DecJan 2026: too few flights (13 flights)JanFeb 2026: too few flights (14 flights)FebMar 2026: 52% on time (25 flights)52MarApr 2026: too few flights (10 flights)AprMay 2026: 80% on time (25 flights)80MayJun 2026: 87% on time (30 flights)87JunJul 2026: 61% on time (31 flights)61JulAug 2026: 71% on time (31 flights)71Aug

By day of week

DayFlightsOn time
Monday3060%
Tuesday2157%
Wednesday2181%
Thursday3165%
Friday3171%
Saturday2176%
Sunday2875%

Why it was late

Airline (crew, maintenance, ops) 64%Severe weather 27%Air traffic & airport (NAS) 10%

All flights AZO → DTW · Connecting off DL 3919? Check the risk

Questions

How often is DL 3919 from DTW to AZO late?

Delta Air Lines 3919 from Detroit, MI to Kalamazoo, MI arrived 15 or more minutes late, was diverted or was cancelled on 34% of 210 scheduled flights between September 2025 and August 2026. 1.4% were cancelled.

How often is DL 3919 from AZO to DTW late?

Delta Air Lines 3919 from Kalamazoo, MI to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 31% of 183 scheduled flights between September 2025 and August 2026. 1.6% 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.