Carrier performance at one airport
DL→FLL
Delta Air Lines at Fort Lauderdale-Hollywood International
- Departures
- 12,884
- Period
- July 2025 to June 2026
- Routes
- 11
- Rank here
- #2 of 9
Delta Air Lines at Fort Lauderdale lands a B, level with the national rate of 77.6%. Roughly one flight in four arrive 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 12,884 flights, of which United Airlines flew 8,891 at 82.4% on time.
Measured against the airport rather than the country, Delta Air Lines runs 6 points ahead of the 71.5% weighted average across all carriers at FLL. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
77.2%
12,578 completed departures
Avg delay
78 min
Across delayed flights only
Cancelled
2.12%
At FLL, this carrier only
Rank here
#2
Of 9 carriers clearing the floor at FLL
These figures cover 13,000 flights between July 2025 and June 2026. Beyond the headline rate, 9.0% 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.
Against the competition
Every carrier at FLL, ranked
The choice of carrier is not cosmetic here. United Airlines arrives on time 82.4% of the time; Allegiant Air manages 62.4%. Sample sizes sit next to every figure, because a two-point gap across 4,620 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 8,891 | 82.4% | 83 min | 1.09% | B |
| Delta Air Lines (this page) | 12,884 | 77.2% | 78 min | 2.12% | B |
| American Airlines | 7,624 | 74.5% | 100 min | 2.53% | C |
| Southwest Airlines | 11,598 | 72.3% | 55 min | 1.08% | C |
| Alaska Airlines | 644 | 71.0% | 57 min | 1.09% | C |
| JetBlue Airways | 22,308 | 68.4% | 66 min | 2.16% | C |
| Spirit Airlines | 18,393 | 67.6% | 70 min | 3.74% | C− |
| Frontier Airlines | 3,202 | 64.6% | 95 min | 3.00% | D |
| Allegiant Air | 4,620 | 62.4% | 76 min | 0.93% | D+ |
Spirit Airlines cancels 3.7% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where Delta Air Lines flies from FLL
Delta Air Lines operates 11 routes out of FLL with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| FLL to ATL · Atlanta | 4,268 | 78.9% | 74 min | 1.66% | B |
| FLL to DTW · Detroit | 1,817 | 79.3% | 75 min | 1.27% | B |
| FLL to JFK · New York | 1,615 | 76.4% | 85 min | 3.65% | B− |
| FLL to LGA · New York | 1,598 | 72.7% | 68 min | 3.69% | C− |
| FLL to BOS · Boston | 884 | 71.8% | 79 min | 3.05% | C− |
| FLL to MSP · Minneapolis | 709 | 81.6% | 83 min | 1.55% | B |
| FLL to CVG · Cincinnati | 533 | 72.7% | 78 min | 1.31% | C |
| FLL to SLC · Salt Lake City | 366 | 76.4% | 89 min | 0.55% | B+ |
| FLL to RDU · Raleighthin sample | 364 | 74.4% | 104 min | 1.10% | C |
| FLL to SEA · Seattlethin sample | 364 | 73.8% | 79 min | 1.65% | C |
| FLL to LAX · Los Angelesthin sample | 363 | 85.8% | 96 min | 1.10% | A |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against 20 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am2,618 flights92.3%
- 8am–11am1,324 flights84.5%
- 11am–2pm2,788 flights77.1%
- 2pm–5pm2,677 flights72.3%
- 5pm–8pm2,444 flights67.6%
- 8pm–5am1,033 flights64.4%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 64.4% on time, against 92.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 11am–2pm window is the busiest, with 2,788 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 67.7% on time, 16 points below September, the best at 83.5%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 1,279 flights.
Delay causes
What holds this operation up
- 43%Late-arriving aircraft
- 34%Carrier
- 19%National Airspace System
- 4%Extreme weather
- 0%Security
43% 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 223,000 reported delay minutes here, that single category outweighs weather by 12 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 223,125 reported delay minutes.
Cancellations sit at 2.12% against a national 1.81%, which is ordinary. Diversions add another 0.26%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.0% 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.
12,884 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 83.5% on time and July 67.7%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 12,578 completed flights over 12 months sit behind that.
Common questions
Delta Air Lines at FLL
How often is Delta Air Lines at FLL delayed?
Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.8% of the 12,884 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Delta Air Lines at FLL?
United Airlines leads at 82.4% on time across 8,891 flights. Allegiant Air is at the other end on 62.4%, a gap of 20 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Delta Air Lines at FLL?
The 5am–8am departure window is the strongest at 92.3% on time. The 8pm–5am window is the weakest at 64.4%, 28 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on Delta Air Lines at FLL?
July is the weakest month at 67.7% on time, compared with 83.5% in September. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- Delta Air Lines network-wide record
- Fort Lauderdale-Hollywood International (FLL) all carriers
- FLL to ATL route record78.9%
- FLL to DTW route record79.3%
- FLL to JFK route record76.4%
- FLL to LGA route record72.7%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.