Flight number record

DL 2514

Delta Air Lines · Salt Lake City to Houston

Route: SLC → IAH
Departs: 17:35
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2514, check with Delta Air Lines.

DL 2514 lands a B+, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 6 minutes early.

On time

78.2%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

122 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.81%

1 hour+ late

9.1%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 9.1% 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.

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 207 of 365 flights, with 17:40 (103 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:35207 flights56.7%
Departs 17:40103 flights28.2%

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 17:35 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, 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.

Against the route

DL 2514 next to SLC to IAH

Every carrier on SLC to IAH combined arrived on time 84.7% of the time across 1,957 flights, so DL 2514 is 7 points behind it. Delta flew 1,011 flights on the same city pair under all its flight numbers, including this one, and those ran 82.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 3 points.

DL 2514 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2514	365	78.2%	122 min	0.27%	B+
All Delta Air Lines on SLC–IAH	1,011	82.1%	81 min	0.20%	B+
All carriers on SLC–IAH	1,957	84.7%	75 min	0.82%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2514 quarter by quarter

Quarter by quarter DL 2514 held fairly steady: 75.0% in Jul–Sep 2025, 79.3% in Oct–Dec 2025, 78.4% in Jan–Mar 2026 and 80.2% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights75.0%
Oct–Dec 202592 flights79.3%
Jan–Mar 202690 flights78.4%
Apr–Jun 202691 flights80.2%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2514 ranged from 71.7% on Tuesday to 82.7% on Monday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2514 runs late

One category carries most of the weight here. Carrier accounts for 70% of the 9,596 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
70%
Late-arriving aircraft
13%
Extreme weather
10%
National Airspace System
6%

The largest share of delay minutes, 70%, 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 6,757 of the 9,596 delay minutes reported here. The split is drawn from 9,596 delay minutes reported on DL 2514.

Cancellations are rare at 0.27%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.1% 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.

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. 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.

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: 7 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.

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