Flight number record

DL 1355

Delta Air Lines · Detroit to Tampa

Route: DTW → TPA
Departs: 20:30
Flights: 337
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1355, check with Delta Air Lines.

DL 1355 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 337 flights, with a median arrival 2 minutes early.

On time

73.9%

Arrivals under 15 minutes late, of 333 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

1.19%

National rate is 1.81%

1 hour+ late

8.1%

National rate is 8.1%

These figures cover 337 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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 1355 flies

DL 1355 flies DTW to TPA without a single fixed slot. Its most common scheduled departure was 20:30, used on 38 of 337 flights, with 21:15 (36 flights) and 18:55 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:3038 flights11.3%
Departs 21:1536 flights10.7%
Departs 18:5534 flights10.1%

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 20:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1355 runs 3 points better at 73.9%. 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 1355 next to DTW to TPA

Every carrier on DTW to TPA combined arrived on time 79.0% of the time across 2,370 flights, so DL 1355 is 5 points behind it. Delta flew 1,716 flights on the same city pair under all its flight numbers, including this one, and those ran 80.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 8 points.

DL 1355 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1355thin sample	337	73.9%	71 min	1.19%	C
All Delta Air Lines on DTW–TPA	1,716	80.9%	61 min	1.34%	B
All carriers on DTW–TPA	2,370	79.0%	61 min	1.86%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1355 quarter by quarter

DL 1355 did not run the same all year. Its best quarter was Apr–Jun 2026 at 80.2% on time and its weakest Jul–Sep 2025 at 66.2%, a swing of 14 points on roughly 84 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 202572 flights66.2%
Oct–Dec 202584 flights77.1%
Jan–Mar 202690 flights70.5%
Apr–Jun 202691 flights80.2%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1355 did best on Thursday at 86.3% on time and worst on Sunday at 64.0%. Each day rests on about 48 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1355 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 6,200 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.

Carrier
48%
Extreme weather
19%
Late-arriving aircraft
17%
National Airspace System
17%

Extreme weather accounts for 19% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.0 times the usual weather exposure. The split is drawn from 6,200 delay minutes reported on DL 1355.

Cancellations sit at 1.19% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 983 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.

Every one of the 337 flights under DL 1355 in the data flew DTW to TPA. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 337 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 1355

For a booking, DL 1355 is one of the weaker ways to fly DTW to TPA: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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