Flight number record
DL 1432
Delta Air Lines · Boston to Detroit
- Route
- BOS → DTW
- Departs
- 17:15
- Flights
- 347
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1432, check with Delta Air Lines.
DL 1432 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 347 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so DL 1432 runs 9 points behind the country as a whole. Across a thousand flights that is about 87 extra late arrivals.
Key figures
On time
68.6%
Arrivals under 15 minutes late, of 341 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
1.44%
National rate is 1.89%
1 hour+ late
12.6%
National rate is 8.3%
These figures cover 347 flights between September 2025 and August 2026. Beyond the headline rate, 12.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1432 flies
DL 1432 flies BOS to DTW without a single fixed slot. Its most common scheduled departure was 17:15, used on 108 of 347 flights, with 16:58 (44 flights) and 16:54 (36 flights) next.
- Departs 17:15108 flights31.1%
- Departs 16:5844 flights12.7%
- Departs 16:5436 flights10.4%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 17:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1432 runs level with that at 68.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1432 next to BOS to DTW
Every carrier on BOS to DTW combined arrived on time 75.7% of the time across 2,575 flights, so DL 1432 is 7 points behind it. Delta flew 1,718 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1432thin sample | 347 | 68.6% | 72 min | 1.44% | C |
| All Delta Air Lines on BOS–DTW | 1,718 | 78.1% | 79 min | 2.21% | B |
| All carriers on BOS–DTW | 2,575 | 75.7% | 78 min | 2.80% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1432 quarter by quarter
DL 1432 did not run the same all year. Its best quarter was Jan–Mar 2026 at 77.1% on time and its weakest Jul–Sep 2026 at 60.0%, a swing of 17 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights76.7%
- Oct–Dec 202579 flights65.8%
- Jan–Mar 202686 flights77.1%
- Apr–Jun 202690 flights66.3%
- Jul–Sep 202662 flights60.0%
Scale runs 50% to 85%.
By weekday, DL 1432 did best on Saturday at 79.2% on time and worst on Sunday at 53.2%. Each day rests on about 50 flights, so a gap of 26 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1432 runs when it is late
The 107 late arrivals split 35 under half an hour, 29 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early83 flights24.3%
- Within 15 min151 flights44.3%
- 15–29 min late35 flights10.3%
- 30–59 min late29 flights8.5%
- 1–2 hours late22 flights6.5%
- 2+ hours late21 flights6.2%
Scale runs 0% to 100%.
Share of 341 completed flights by arrival against schedule.
28 of 116 late departures made up the time and arrived on time, 24% of them. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DTW.
The worst days
Worst days for DL 1432
The latest arrival of the period was on 12 October 2025, 4 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across October, May, September, July and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 October 2025 | 4 hours 43 minutes | Carrier |
| 19 May 2026 | 4 hours 28 minutes | National Airspace System |
| 25 September 2025 | 4 hours 11 minutes | Late-arriving aircraft |
| 31 July 2026 | 4 hours 9 minutes | Carrier |
| 27 January 2026 | 3 hours 54 minutes | Late-arriving aircraft |
Delay causes
Why DL 1432 runs late
Late-arriving aircraft accounts for 50% of the 7,729 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 27%National Airspace System
- 22%Carrier
- 1%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,729 reported delay minutes here, that single category outweighs weather by 44 to one. The split is drawn from 7,729 delay minutes reported on DL 1432.
Cancellations sit at 1.44% against a national 1.89%, which is ordinary. Diversions add another 0.29%.
Connections and routes
What a delay on this flight costs
12.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 632 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on two other city pairs in the data, including ATL to IAH (12) and IAH to ATL (12), but none flew often enough under DL 1432 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to DTW only.
One caution: this is a thin sample. 347 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 1432
For a booking, DL 1432 is a flight to put a long connection behind. 12.6% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- BOS to DTW, every carrier and departure
- DTW to BOS, the return direction
- Delta Air Lines 1748 on the same route86.9%
- Delta Air Lines 1019 on the same route94.1%
- Delta Air Lines 2222 on the same route80.7%
- Boston Logan International (BOS) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.