Flight number record

DL 2708

Delta Air Lines · Ontario to Salt Lake City

Route: ONT → SLC
Departs: 06:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2708, check with Delta Air Lines.

DL 2708 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 365 flights, with a median arrival 14 minutes early.

Set against the rest of the country, DL 2708's record is 18 points better than the US average of 77.6%. That gap is worth roughly 177 fewer late arrivals for every thousand flights.

On time

95.3%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

100 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

1.9%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 14 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.

Schedule

When DL 2708 flies

DL 2708 is scheduled to leave Ontario (ONT) at 06:00 local time and reach Salt Lake City (SLC) at 08:50. That slot held for 335 of the 365 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:00335 flights91.8%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2708 runs 6 points better at 95.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2708 next to ONT to SLC

Every carrier on ONT to SLC combined arrived on time 91.7% of the time across 1,239 flights, so DL 2708 is 4 points ahead of it. Delta flew 902 flights on the same city pair under all its flight numbers, including this one, and those ran 91.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 14 points.

DL 2708 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2708	365	95.3%	100 min	0.55%	A+
All Delta Air Lines on ONT–SLC	902	91.7%	83 min	1.11%	A
All carriers on ONT–SLC	1,239	91.7%	83 min	0.89%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2708 quarter by quarter

Quarter by quarter DL 2708 held fairly steady: 94.6% in Jul–Sep 2025, 92.4% in Oct–Dec 2025, 97.7% in Jan–Mar 2026 and 96.7% 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 flights94.6%
Oct–Dec 202592 flights92.4%
Jan–Mar 202690 flights97.7%
Apr–Jun 202691 flights96.7%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2708 ranged from 92.0% on Monday to 98.1% on Tuesday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2708 runs late

One category carries most of the weight here. Carrier accounts for 80% of the 1,706 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
80%
Late-arriving aircraft
16%
National Airspace System
4%

The largest share of delay minutes, 80%, 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 1,363 of the 1,706 delay minutes reported here. The split is drawn from 1,706 delay minutes reported on DL 2708.

Cancellations are rare at 0.55%, 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

Badly late arrivals are rare here: only 1.9% land an hour or more behind schedule, against 8.1% 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 558 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 2708 in the data flew ONT to SLC. 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 2708

For a booking, DL 2708 has one of the better records a US domestic flight can show: 95.3% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.

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