Flight number record

DL 1432

Delta Air Lines · Boston to Detroit

Route: BOS → DTW
Departs: 17:15
Flights: 346
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 8 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 346 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.6%, so DL 1432 runs 8 points behind the country as a whole. Across a thousand flights that is about 75 extra late arrivals.

On time

70.1%

Arrivals under 15 minutes late, of 341 completed flights

Avg delay

73 min

Across delayed arrivals only, not all flights

Cancelled

1.16%

National rate is 1.81%

1 hour+ late

12.0%

National rate is 8.1%

These figures cover 346 flights between July 2025 and June 2026. Beyond the headline rate, 12.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 51 of 346 flights, with 16:58 (44 flights) and 16:54 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:1551 flights14.7%
Departs 16:5844 flights12.7%
Departs 16:5436 flights10.4%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 68.2%, and DL 1432 runs level with that at 70.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1432 next to BOS to DTW

Every carrier on BOS to DTW combined arrived on time 77.6% of the time across 2,591 flights, so DL 1432 is 8 points behind it. Delta flew 1,712 flights on the same city pair under all its flight numbers, including this one, and those ran 79.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 12 points.

DL 1432 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1432thin sample	346	70.1%	73 min	1.16%	C
All Delta Air Lines on BOS–DTW	1,712	79.6%	77 min	2.04%	B
All carriers on BOS–DTW	2,591	77.6%	75 min	2.12%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 Oct–Dec 2025 at 65.8%, a swing of 11 points on roughly 87 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 202591 flights71.1%
Oct–Dec 202579 flights65.8%
Jan–Mar 202686 flights77.1%
Apr–Jun 202690 flights66.3%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1432 did best on Saturday at 81.2% on time and worst on Sunday at 53.2%. Each day rests on about 49 flights, so a gap of 28 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1432 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 7,434 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
53%
Carrier
23%
National Airspace System
23%
Extreme weather
1%

53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 7,434 reported delay minutes here, that single category outweighs weather by 45 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 7,434 delay minutes reported on DL 1432.

Cancellations sit at 1.16% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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. 346 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. 12.0% 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures