ON TIMEBOARD
Delta Air Lines / CLE → BOS

DL 5674 on time

Delta Air Lines 5674: Cleveland to Boston at 11:15 a.m.; Boston to Cleveland at 8:30 a.m. (past 12 months). Figures below the title are for CLE → BOS, its busiest leg

On time
87%
199 flights · likely 82–91%
Cancelled
1.5%
of scheduled flights
Typical arrival
−16 min
median vs schedule
When late
+63 min
average delay
Similar flights
86%
DL, same route & hour

About 1 in 8 DL 5674 flights from Cleveland arrived 15+ minutes late, diverted or cancelled over the past year (13%); 1.5% were cancelled. The typical flight landed 16 minutes early.

DL 5674: CLE → BOS

Scheduled to leave Cleveland at 11:15 a.m. local time, operated by Republic Airways as YX 5674. Over the past year it arrived on time 87% of the time (199 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%Jun 2025: 83% on time (18 flights)83JunJul 2025: 100% on time (20 flights)100JulAug 2025: 100% on time (21 flights)100AugSep 2025: 95% on time (19 flights)95SepOct 2025: 89% on time (27 flights)89OctNov 2025: 71% on time (24 flights)71NovDec 2025: 82% on time (17 flights)82DecApr 2026: too few flights (14 flights)AprMay 2026: 90% on time (20 flights)90MayJun 2026: 92% on time (26 flights)92JunJul 2026: 85% on time (26 flights)85JulAug 2026: 88% on time (26 flights)88Aug

By day of week

DayFlightsOn time
Monday3681%
Tuesday3488%
Wednesday3494%
Thursday3482%
Friday3485%
Saturday14—
Sunday13—

Why it was late

Airline (crew, maintenance, ops) 46%Air traffic & airport (NAS) 34%Late inbound plane 14%Severe weather 7%

All flights CLE → BOS · Connecting off DL 5674? Check the risk

DL 5674: BOS → CLE

Scheduled to leave Boston at 8:30 a.m. local time, operated by Republic Airways as YX 5674. Over the past year it arrived on time 92% of the time (199 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%Jun 2025: 94% on time (18 flights)94JunJul 2025: 91% on time (23 flights)91JulAug 2025: 96% on time (23 flights)96AugSep 2025: 95% on time (19 flights)95SepOct 2025: 93% on time (27 flights)93OctNov 2025: 96% on time (25 flights)96NovDec 2025: 94% on time (17 flights)94DecApr 2026: too few flights (14 flights)AprMay 2026: 95% on time (20 flights)95MayJun 2026: 88% on time (26 flights)88JunJul 2026: 88% on time (25 flights)88JulAug 2026: 92% on time (26 flights)92Aug

By day of week

DayFlightsOn time
Monday3686%
Tuesday3491%
Wednesday3497%
Thursday3591%
Friday3494%
Saturday14—
Sunday12—

Why it was late

Airline (crew, maintenance, ops) 51%Air traffic & airport (NAS) 37%Severe weather 8%Late inbound plane 4%

All flights BOS → CLE · Connecting off DL 5674? Check the risk

Questions

How often is DL 5674 from CLE to BOS late?

Delta Air Lines 5674 from Cleveland, OH to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 13% of 199 scheduled flights between September 2025 and August 2026. 1.5% were cancelled.

How often is DL 5674 from BOS to CLE late?

Delta Air Lines 5674 from Boston, MA to Cleveland, OH arrived 15 or more minutes late, was diverted or was cancelled on 8% of 199 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.