Flight number record

DL 1225

Delta Air Lines · Detroit to Fort Myers

Route: DTW → RSW
Departs: 14:02
Flights: 344
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1225, check with Delta Air Lines.

DL 1225 lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 344 flights, with a median arrival 2 minutes early.

On time

77.2%

Arrivals under 15 minutes late, of 333 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

2.33%

National rate is 1.81%

1 hour+ late

7.5%

National rate is 8.1%

These figures cover 344 flights between July 2025 and June 2026. The median arrival is 2 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 1225 flies

DL 1225 flies DTW to RSW without a single fixed slot. Its most common scheduled departure was 14:02, used on 90 of 344 flights, with 14:00 (66 flights) and 14:56 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:0290 flights26.2%
Departs 14:0066 flights19.2%
Departs 14:5638 flights11.0%

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 14:02 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 1225 runs 5 points better at 77.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1225 next to DTW to RSW

Every carrier on DTW to RSW combined arrived on time 74.7% of the time across 1,820 flights, so DL 1225 is 3 points ahead of it. Delta flew 1,354 flights on the same city pair under all its flight numbers, including this one, and those ran 75.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 1225 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1225thin sample	344	77.2%	70 min	2.33%	B
All Delta Air Lines on DTW–RSW	1,354	75.1%	68 min	1.33%	B
All carriers on DTW–RSW	1,820	74.7%	67 min	2.03%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1225 quarter by quarter

DL 1225 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jan–Mar 2026 at 69.0%, a swing of 14 points on roughly 86 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 202592 flights83.3%
Oct–Dec 202575 flights79.2%
Jan–Mar 202686 flights69.0%
Apr–Jun 202691 flights77.0%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1225 did best on Thursday at 85.4% on time and worst on Sunday at 63.0%. Each day rests on about 49 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1225 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 5,316 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
47%
Late-arriving aircraft
23%
National Airspace System
20%
Extreme weather
10%

The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,523 of the 5,316 delay minutes reported here. The split is drawn from 5,316 delay minutes reported on DL 1225.

Cancellations sit at 2.33% against a national 1.81%, which is ordinary. Diversions add another 0.87%.

Connections and routes

What a delay on this flight costs

7.5% 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 1,084 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 RSW to DTW (240) and GNV to ATL (16), but none flew often enough under DL 1225 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to RSW only.

One caution: this is a thin sample. 344 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 1225

For a booking, read DL 1225 as 77.2% on time with 2.33% cancelled over 344 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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