ON TIMEBOARD
Delta Air Lines / BOS → PIT

DL 5678 on time

Delta Air Lines 5678: Boston to Pittsburgh at 8:45 a.m.; Pittsburgh to Boston at 10:59 a.m. (past 12 months). Figures below the title are for BOS → PIT, its busiest leg

On time
88%
223 flights · likely 83–92%
Cancelled
1.8%
of scheduled flights
Typical arrival
−11 min
median vs schedule
When late
+73 min
average delay
Similar flights
90%
DL, same route & hour

About 1 in 8 DL 5678 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (12%); 1.8% were cancelled. The typical flight landed 11 minutes early.

DL 5678: BOS → PIT

Scheduled to leave Boston at 8:45 a.m. local time, operated by Republic Airways as YX 5678. Over the past year it arrived on time 88% of the time (223 flights), in line with other DL flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Apr 2025: 79% on time (28 flights)79AprMay 2025: 97% on time (30 flights)97MayJun 2025: too few flights (7 flights)JunDec 2025: too few flights (10 flights)DecJan 2026: 82% on time (28 flights)82JanFeb 2026: 76% on time (25 flights)76FebMar 2026: 85% on time (26 flights)85MarApr 2026: 93% on time (28 flights)93AprMay 2026: 100% on time (27 flights)100MayJun 2026: 100% on time (26 flights)100JunJul 2026: 85% on time (27 flights)85JulAug 2026: 81% on time (26 flights)81Aug

By day of week

DayFlightsOn time
Monday3786%
Tuesday3683%
Wednesday3692%
Thursday3591%
Friday3589%
Saturday3786%
Sunday7—

Why it was late

Late inbound plane 53%Airline (crew, maintenance, ops) 34%Air traffic & airport (NAS) 10%Severe weather 4%

All flights BOS → PIT · Connecting off DL 5678? Check the risk

DL 5678: PIT → BOS

Scheduled to leave Pittsburgh at 10:59 a.m. local time, operated by Republic Airways as YX 5678. Over the past year it arrived on time 85% of the time (169 flights), in line with other DL flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2025: 95% on time (20 flights)95MarApr 2025: too few flights (11 flights)AprMay 2025: 96% on time (25 flights)96MayJun 2025: too few flights (7 flights)JunJan 2026: 83% on time (24 flights)83JanFeb 2026: 84% on time (25 flights)84FebMar 2026: 88% on time (26 flights)88MarApr 2026: 89% on time (28 flights)89AprMay 2026: too few flights (5 flights)MayJun 2026: 82% on time (17 flights)82JunJul 2026: 83% on time (23 flights)83JulAug 2026: 81% on time (21 flights)81Aug

By day of week

DayFlightsOn time
Monday3171%
Tuesday3087%
Wednesday3087%
Thursday2997%
Friday2983%
Saturday17—
Sunday3—

Why it was late

Airline (crew, maintenance, ops) 49%Late inbound plane 22%Air traffic & airport (NAS) 18%Severe weather 10%

All flights PIT → BOS · Connecting off DL 5678? Check the risk

Questions

How often is DL 5678 from BOS to PIT late?

Delta Air Lines 5678 from Boston, MA to Pittsburgh, PA arrived 15 or more minutes late, was diverted or was cancelled on 12% of 223 scheduled flights between September 2025 and August 2026. 1.8% were cancelled.

How often is DL 5678 from PIT to BOS late?

Delta Air Lines 5678 from Pittsburgh, PA to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 15% of 169 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.