Flight number record

DL 705

Delta Air Lines · Salt Lake City to New York

Route: SLC → JFK
Departs: 23:55
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 705, check with Delta Air Lines.

DL 705 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 363 flights, with a median arrival 17 minutes early.

Set against the rest of the country, DL 705's record is 11 points better than the US average of 77.6%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.

On time

88.8%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

1.65%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. The median arrival is 17 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 705 flies

DL 705 flies SLC to JFK without a single fixed slot. Its most common scheduled departure was 23:55, used on 141 of 363 flights, with 23:59 (92 flights) and 23:50 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:55141 flights38.8%
Departs 23:5992 flights25.3%
Departs 23:5052 flights14.3%

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 23:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 705 runs 18 points better at 88.8%. 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 705 next to SLC to JFK

Every carrier on SLC to JFK combined arrived on time 82.0% of the time across 1,931 flights, so DL 705 is 7 points ahead of it. Delta flew 1,538 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 705 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 705thin sample	363	88.8%	60 min	1.65%	A
All Delta Air Lines on SLC–JFK	1,538	83.5%	68 min	1.63%	B
All carriers on SLC–JFK	1,931	82.0%	76 min	1.92%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 705 quarter by quarter

DL 705 did not run the same all year. Its best quarter was Oct–Dec 2025 at 93.3% on time and its weakest Apr–Jun 2026 at 82.4%, a swing of 11 points on roughly 91 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 202591 flights92.2%
Oct–Dec 202591 flights93.3%
Jan–Mar 202690 flights87.1%
Apr–Jun 202691 flights82.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 705 ranged from 86.0% on Monday to 91.8% on Sunday. 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 705 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 2,417 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
48%
Late-arriving aircraft
45%
National Airspace System
7%

45% 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 2,417 reported delay minutes here, that single category outweighs weather by 45 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 2,417 delay minutes reported on DL 705.

Cancellations sit at 1.65% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% 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.

At 1,990 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

Every one of the 363 flights under DL 705 in the data flew SLC to JFK. 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. 363 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 705

For a booking, read DL 705 as 88.8% on time with 1.65% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular 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