Flight number record
DL 1089
Delta Air Lines · Atlanta to Fort Myers
- Route
- ATL → RSW
- Departs
- 08:05
- Flights
- 360
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1089, check with Delta Air Lines.
DL 1089 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 360 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 1089's record is 12 points better than the US average of 77.3%. That gap is worth roughly 121 fewer late arrivals for every thousand flights.
Key figures
On time
89.4%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
42 min
Across delayed arrivals only, not all flights
Cancelled
2.50%
National rate is 1.89%
1 hour+ late
2.3%
National rate is 8.3%
These figures cover 360 flights between September 2025 and August 2026. The median arrival is 9 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 1089 flies
DL 1089 flies ATL to RSW without a single fixed slot. Its most common scheduled departure was 08:05, used on 168 of 360 flights, with 08:15 (43 flights) next.
- Departs 08:05168 flights46.7%
- Departs 08:1543 flights11.9%
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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1089 runs 6 points better at 89.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1089 next to ATL to RSW
Every carrier on ATL to RSW combined arrived on time 76.8% of the time across 2,806 flights, so DL 1089 is 13 points ahead of it. Delta flew 2,720 flights on the same city pair under all its flight numbers, including this one, and those ran 77.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1089thin sample | 360 | 89.4% | 42 min | 2.50% | A |
| All Delta Air Lines on ATL–RSW | 2,720 | 77.4% | 57 min | 1.58% | B |
| All carriers on ATL–RSW | 2,806 | 76.8% | 57 min | 1.60% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1089 quarter by quarter
Quarter by quarter DL 1089 held fairly steady: 87.4% in Oct–Dec 2025, 87.4% in Jan–Mar 2026, 88.9% in Apr–Jun 2026 and 93.4% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202525 flights—
- Oct–Dec 202592 flights87.4%
- Jan–Mar 202690 flights87.4%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights93.4%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1089 did best on Thursday at 96.0% on time and worst on Monday at 83.3%. Each day rests on about 51 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1089 runs when it is late
The 37 late arrivals split 17 under half an hour, 12 between 30 and 60 minutes, and 8 an hour or more.
- 15+ min early82 flights23.4%
- Within 15 min231 flights66.0%
- 15–29 min late17 flights4.9%
- 30–59 min late12 flights3.4%
- 1–2 hours late7 flights2.0%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 350 completed flights by arrival against schedule.
7 of 33 late departures made up the time and arrived on time, 21% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 1089
The latest arrival of the period was on 7 December 2025, 2 hours 30 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 |
|---|---|---|
| 7 December 2025 | 2 hours 30 minutes | National Airspace System |
| 23 June 2026 | 1 hour 43 minutes | Carrier |
| 29 October 2025 | 1 hour 30 minutes | Carrier |
| 5 July 2026 | 1 hour 20 minutes | Carrier |
| 16 March 2026 | 1 hour 17 minutes | National Airspace System |
Delay causes
Why DL 1089 runs late
Carrier accounts for 52% of the 1,546 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 38%National Airspace System
- 10%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 801 of the 1,546 delay minutes reported here. The split is drawn from 1,546 delay minutes reported on DL 1089.
Cancellations run at 2.50%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.3% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 515 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.
DL 1089 is not only a ATL to RSW flight. It also flew RSW to ATL (345 flights, 88.2% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 360 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| RSW to ATLthin sample | 345 | 88.2% | 76 min | 2.03% | A |
What to do with this
Booking DL 1089
For a booking, the cancellation rate is the figure to plan around on DL 1089: 2.50% of its 360 scheduled flights did not operate. A late arrival costs roughly 40 minutes, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to RSW, every carrier and departure
- RSW to ATL, the return direction
- Delta Air Lines 1196 on the same route82.4%
- Delta Air Lines 1153 on the same route83.3%
- Delta Air Lines 1124 on the same route71.8%
- Delta Air Lines 1736 on the same route65.6%
- Delta Air Lines 1217 on the same route71.8%
- Hartsfield-Jackson Atlanta International (ATL) 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
- What a cancellation rate actually tells you (and what it hides)
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.