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Delta Air Lines / BOS → MKE

DL 5614 on time

Delta Air Lines 5614: Boston to Milwaukee at 9:10 a.m.; Milwaukee to Boston at 11:58 a.m. (past 12 months). Figures below the title are for BOS → MKE, its busiest leg

On time
87%
247 flights · likely 82–90%
Cancelled
2.0%
of scheduled flights
Typical arrival
−10 min
median vs schedule
When late
+48 min
average delay
Similar flights
88%
DL, same route & hour

About 1 in 7 DL 5614 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (13%); 2.0% were cancelled. The typical flight landed 10 minutes early.

DL 5614: BOS → MKE

Scheduled to leave Boston at 9:10 a.m. local time, operated by Republic Airways as YX 5614. Over the past year it arrived on time 87% of the time (247 flights), in line with other DL flights on the route at that hour (88%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Aug 2025: 87% on time (31 flights)87AugSep 2025: 73% on time (30 flights)73SepOct 2025: 84% on time (31 flights)84OctNov 2025: 72% on time (29 flights)72NovDec 2025: too few flights (13 flights)DecJan 2026: too few flights (4 flights)JanMar 2026: 95% on time (20 flights)95MarApr 2026: 100% on time (23 flights)100AprMay 2026: 96% on time (26 flights)96MayJun 2026: 96% on time (23 flights)96JunJul 2026: 87% on time (23 flights)87JulAug 2026: 88% on time (25 flights)88Aug

By day of week

DayFlightsOn time
Monday4190%
Tuesday4080%
Wednesday4093%
Thursday3987%
Friday3681%
Saturday3485%
Sunday17—

Why it was late

Airline (crew, maintenance, ops) 62%Air traffic & airport (NAS) 31%Late inbound plane 7%

All flights BOS → MKE · Connecting off DL 5614? Check the risk

DL 5614: MKE → BOS

Scheduled to leave Milwaukee at 11:58 a.m. local time, operated by Republic Airways as YX 5614. Over the past year it arrived on time 66% of the time (236 flights), better than other DL flights on the route at that hour (61%). Last seen in the data Aug 31, 2026.

Month by month

10%55%100%Aug 2025: 80% on time (25 flights)80AugSep 2025: 24% on time (29 flights)24SepOct 2025: 35% on time (31 flights)35OctNov 2025: 77% on time (30 flights)77NovDec 2025: too few flights (5 flights)DecJan 2026: too few flights (1 flights)JanMar 2026: 95% on time (20 flights)95MarApr 2026: 78% on time (23 flights)78AprMay 2026: 77% on time (26 flights)77MayJun 2026: 83% on time (23 flights)83JunJul 2026: 65% on time (23 flights)65JulAug 2026: 76% on time (25 flights)76Aug

By day of week

DayFlightsOn time
Monday3956%
Tuesday3964%
Wednesday4070%
Thursday3967%
Friday3574%
Saturday3070%
Sunday14—

Why it was late

Air traffic & airport (NAS) 48%Airline (crew, maintenance, ops) 28%Severe weather 17%Late inbound plane 7%

All flights MKE → BOS · Connecting off DL 5614? Check the risk

Questions

How often is DL 5614 from BOS to MKE late?

Delta Air Lines 5614 from Boston, MA to Milwaukee, WI arrived 15 or more minutes late, was diverted or was cancelled on 13% of 247 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.

How often is DL 5614 from MKE to BOS late?

Delta Air Lines 5614 from Milwaukee, WI to Boston, MA arrived 15 or more minutes late, was diverted or was cancelled on 34% of 236 scheduled flights between September 2025 and August 2026. 2.5% 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.