ON TIMEBOARD
Delta Air Lines / RDU → MSP

DL 2521 on time

Delta Air Lines 2521: Raleigh to Minneapolis at 3:05 p.m.; Minneapolis to Raleigh at 10:30 a.m. (past 12 months). Figures below the title are for RDU → MSP, its busiest leg

On time
84%
182 flights · likely 77–88%
Cancelled
0.0%
of scheduled flights
Typical arrival
−10 min
median vs schedule
When late
+74 min
average delay
Similar flights
87%
DL, same route & hour

About 1 in 6 DL 2521 flights from Raleigh arrived 15+ minutes late, diverted or cancelled over the past year (16%); 0.0% were cancelled. The typical flight landed 10 minutes early.

DL 2521: RDU → MSP

Scheduled to leave Raleigh at 3:05 p.m. local time. Over the past year it arrived on time 84% of the time (182 flights), worse 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%May 2025: 76% on time (25 flights)76MayJun 2025: 83% on time (30 flights)83JunJul 2025: 65% on time (31 flights)65JulAug 2025: 90% on time (31 flights)90AugSep 2025: 77% on time (30 flights)77SepOct 2025: 100% on time (28 flights)100OctNov 2025: 85% on time (26 flights)85NovDec 2025: too few flights (1 flights)DecMay 2026: 90% on time (20 flights)90MayJun 2026: 78% on time (23 flights)78JunJul 2026: 75% on time (24 flights)75JulAug 2026: 80% on time (30 flights)80Aug

By day of week

DayFlightsOn time
Monday3090%
Tuesday2879%
Wednesday28100%
Thursday2976%
Friday2983%
Saturday10—
Sunday2875%

Why it was late

Airline (crew, maintenance, ops) 42%Late inbound plane 40%Air traffic & airport (NAS) 15%Severe weather 3%

All flights RDU → MSP · Connecting off DL 2521? Check the risk

DL 2521: MSP → RDU

Scheduled to leave Minneapolis at 10:30 a.m. local time. Over the past year it arrived on time 85% of the time (182 flights), in line with other DL flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%May 2025: 88% on time (25 flights)88MayJun 2025: 73% on time (30 flights)73JunJul 2025: 74% on time (31 flights)74JulAug 2025: 87% on time (31 flights)87AugSep 2025: 77% on time (30 flights)77SepOct 2025: 100% on time (28 flights)100OctNov 2025: 88% on time (26 flights)88NovDec 2025: too few flights (1 flights)DecMay 2026: 90% on time (20 flights)90MayJun 2026: 74% on time (23 flights)74JunJul 2026: 79% on time (24 flights)79JulAug 2026: 87% on time (30 flights)87Aug

By day of week

DayFlightsOn time
Monday3097%
Tuesday2882%
Wednesday28100%
Thursday2979%
Friday2979%
Saturday10—
Sunday2871%

Why it was late

Airline (crew, maintenance, ops) 74%Air traffic & airport (NAS) 15%Late inbound plane 12%

All flights MSP → RDU · Connecting off DL 2521? Check the risk

Questions

How often is DL 2521 from RDU to MSP late?

Delta Air Lines 2521 from Raleigh/Durham, NC to Minneapolis, MN arrived 15 or more minutes late, was diverted or was cancelled on 16% of 182 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

How often is DL 2521 from MSP to RDU late?

Delta Air Lines 2521 from Minneapolis, MN to Raleigh/Durham, NC arrived 15 or more minutes late, was diverted or was cancelled on 15% of 182 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.