Flight number record
DL 1225
Delta Air Lines · Detroit to Fort Myers
- Route
- DTW → RSW
- Departs
- 14:02
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. 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 rests on 340 flights, with a median arrival 3 minutes early.
Key figures
On time
77.6%
Arrivals under 15 minutes late, of 331 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.76%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. The median arrival is 3 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.
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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 69 of 340 flights, with 14:56 (38 flights) and 15:22 (36 flights) next.
- Departs 14:0269 flights20.3%
- Departs 14:5638 flights11.2%
- Departs 15:2236 flights10.6%
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 14:02 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1225 runs 6 points better at 77.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1225 next to DTW to RSW
Every carrier on DTW to RSW combined arrived on time 74.5% of the time across 1,774 flights, so DL 1225 is 3 points ahead of it. Delta flew 1,357 flights on the same city pair under all its flight numbers, including this one, and those ran 75.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1225thin sample | 340 | 77.6% | 68 min | 1.76% | B |
| All Delta Air Lines on DTW–RSW | 1,357 | 75.4% | 69 min | 1.18% | B |
| All carriers on DTW–RSW | 1,774 | 74.5% | 67 min | 1.97% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 90.0% on time and its weakest Jan–Mar 2026 at 69.0%, a swing of 21 points on roughly 68 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 flights90.0%
- Oct–Dec 202575 flights79.2%
- Jan–Mar 202686 flights69.0%
- Apr–Jun 202691 flights77.0%
- Jul–Sep 202658 flights82.8%
Scale runs 60% to 95%.
By weekday, DL 1225 did best on Tuesday at 89.1% on time and worst on Sunday at 66.0%. Each day rests on about 49 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1225 runs when it is late
The 74 late arrivals split 27 under half an hour, 21 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early53 flights16.0%
- Within 15 min204 flights61.6%
- 15–29 min late27 flights8.2%
- 30–59 min late21 flights6.3%
- 1–2 hours late16 flights4.8%
- 2+ hours late10 flights3.0%
Scale runs 0% to 100%.
Share of 331 completed flights by arrival against schedule.
11 of 63 late departures made up the time and arrived on time, 17% of them. In the other direction, 22 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 RSW.
The worst days
Worst days for DL 1225
The latest arrival of the period was on 16 March 2026, 6 hours 43 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 6 hours 43 minutes | National Airspace System |
| 18 October 2025 | 5 hours 25 minutes | Carrier |
| 7 December 2025 | 5 hours 22 minutes | Late-arriving aircraft |
| 18 May 2026 | 4 hours 20 minutes | Carrier |
| 24 January 2026 | 4 hours 8 minutes | Carrier |
Delay causes
Why DL 1225 runs late
Carrier accounts for 47% of the 5,040 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 28%Late-arriving aircraft
- 22%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,371 of the 5,040 delay minutes reported here. The split is drawn from 5,040 delay minutes reported on DL 1225.
Cancellations sit at 1.76% against a national 1.89%, which is ordinary. Diversions add another 0.88%.
Connections and routes
What a delay on this flight costs
7.9% of arrivals land an hour or more late, close to the national 8.3%, so 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.
The same number turns up on two other city pairs in the data, including RSW to DTW (178) 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. 340 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 77.6% on time with 1.76% cancelled over 340 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to RSW, every carrier and departure
- RSW to DTW, the return direction
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Southwest Florida International (RSW) 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
- Worst months to fly in the US, ranked by the data
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.