Flight number record
DL 2514
Delta Air Lines · Salt Lake City to Houston
- Route
- SLC → IAH
- Departs
- 17:35
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2514, check with Delta Air Lines.
DL 2514 lands a B+, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 365 flights, with a median arrival 6 minutes early.
Key figures
On time
78.2%
Arrivals under 15 minutes late, of 363 completed flights
Avg delay
110 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
8.5%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2514 flies
DL 2514 flies SLC to IAH without a single fixed slot. Its most common scheduled departure was 17:35, used on 145 of 365 flights, with 17:40 (103 flights) and 17:45 (86 flights) next.
- Departs 17:35145 flights39.7%
- Departs 17:40103 flights28.2%
- Departs 17:4586 flights23.6%
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 17:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2514 runs 10 points better at 78.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2514 next to SLC to IAH
Every carrier on SLC to IAH combined arrived on time 86.1% of the time across 1,931 flights, so DL 2514 is 8 points behind it. Delta flew 1,016 flights on the same city pair under all its flight numbers, including this one, and those ran 83.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2514 | 365 | 78.2% | 110 min | 0.27% | B+ |
| All Delta Air Lines on SLC–IAH | 1,016 | 83.1% | 77 min | 0.20% | B+ |
| All carriers on SLC–IAH | 1,931 | 86.1% | 77 min | 0.73% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2514 quarter by quarter
DL 2514 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jul–Sep 2026 at 71.0%, a swing of 12 points on roughly 73 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 flights83.3%
- Oct–Dec 202592 flights79.3%
- Jan–Mar 202690 flights78.4%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights71.0%
Scale runs 65% to 90%.
By weekday, DL 2514 did best on Friday at 84.6% on time and worst on Sunday at 68.0%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2514 runs when it is late
DL 2514 often beats the schedule: 95 of 363 completed flights, 26%, arrived 15 minutes or more early. The 79 late arrivals split 26 under half an hour, 22 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early95 flights26.2%
- Within 15 min189 flights52.1%
- 15–29 min late26 flights7.2%
- 30–59 min late22 flights6.1%
- 1–2 hours late11 flights3.0%
- 2+ hours late20 flights5.5%
Scale runs 0% to 100%.
Share of 363 completed flights by arrival against schedule.
15 of 82 late departures made up the time and arrived on time, 18% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 2514
The latest arrival of the period was on 21 November 2025, 18 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 November 2025 | 18 hours 43 minutes | Carrier |
| 12 November 2025 | 15 hours 5 minutes | Carrier |
| 10 May 2026 | 14 hours 21 minutes | Extreme weather |
| 18 September 2025 | 14 hours 19 minutes | Carrier |
| 25 July 2026 | 3 hours 27 minutes | Carrier |
Delay causes
Why DL 2514 runs late
Carrier accounts for 66% of the 8,720 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 15%Late-arriving aircraft
- 12%Extreme weather
- 7%National Airspace System
Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 8,720 delay minutes reported on DL 2514.
Cancellations are rare at 0.27%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.5% 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 close to two hours, which a normal layover absorbs.
The 1,195 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.
Every one of the 365 flights under DL 2514 in the data flew SLC to IAH. 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. 365 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 2514
For a booking, DL 2514 is one of the weaker ways to fly SLC to IAH: 8 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.
Related
Where to go next
- SLC to IAH, every carrier and departure
- IAH to SLC, the return direction
- Delta Air Lines 2502 on the same route89.0%
- United Airlines 2366 on the same route94.4%
- Salt Lake City International (SLC) delay statistics
- George Bush Intercontinental (IAH) 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.