Flight number record

DL 705

Delta Air Lines · Salt Lake City to New York

Route: SLC → JFK
Departs: 23:59
Flights: 364
Period: September 2025 to August 2026

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

DL 705 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 364 flights, with a median arrival 15 minutes early.

Set against the rest of the country, DL 705's record is 9 points better than the US average of 77.3%. That gap is worth roughly 92 fewer late arrivals for every thousand flights.

On time

86.5%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.89%

1 hour+ late

5.1%

National rate is 8.3%

These figures cover 364 flights between September 2025 and August 2026. The median arrival is 15 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.

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Schedule

When DL 705 flies

DL 705 flies SLC to JFK without a single fixed slot. Its most common scheduled departure was 23:59, used on 154 of 364 flights, with 23:55 (135 flights) and 23:50 (52 flights) next.

Departs 23:59154 flights42.3%
Departs 23:55135 flights37.1%
Departs 23:5052 flights14.3%

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 23:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 705 runs 16 points better at 86.5%. 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 705 next to SLC to JFK

Every carrier on SLC to JFK combined arrived on time 81.3% of the time across 1,932 flights, so DL 705 is 5 points ahead of it. Delta flew 1,539 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 5 points.

DL 705 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 705thin sample	364	86.5%	60 min	1.92%	A
All Delta Air Lines on SLC–JFK	1,539	83.2%	66 min	1.95%	B
All carriers on SLC–JFK	1,932	81.3%	72 min	2.59%	B
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 705 quarter by quarter

DL 705 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jul–Sep 2026 at 75.0%, a swing of 25 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 flights100.0%
Oct–Dec 202591 flights93.3%
Jan–Mar 202690 flights87.1%
Apr–Jun 202691 flights82.4%
Jul–Sep 202662 flights75.0%

Scale runs 65% to 100%.

By weekday, DL 705 did best on Sunday at 93.9% on time and worst on Monday at 80.8%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 705 runs when it is late

DL 705 often beats the schedule: 185 of 356 completed flights, 52%, arrived 15 minutes or more early. The 48 late arrivals split 16 under half an hour, 14 between 30 and 60 minutes, and 18 an hour or more.

15+ min early185 flights52.0%
Within 15 min123 flights34.6%
15–29 min late16 flights4.5%
30–59 min late14 flights3.9%
1–2 hours late11 flights3.1%
2+ hours late7 flights2.0%

Scale runs 0% to 100%.

Share of 356 completed flights by arrival against schedule.

A late pushback is often recovered here: of 66 departures that left 15 minutes late or more, 24 still arrived on time. Only 6 left on time and still arrived late.

The worst days

Worst days for DL 705

The latest arrival of the period was on 8 November 2025, 3 hours 2 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of DL 705 in the period
Date	Arrived late by	Largest filed cause
8 November 2025	3 hours 2 minutes	Carrier
25 February 2026	2 hours 41 minutes	Carrier
17 April 2026	2 hours 30 minutes	Late-arriving aircraft
14 April 2026	2 hours 23 minutes	Late-arriving aircraft
6 August 2026	2 hours 15 minutes	Carrier

Delay causes

Why DL 705 runs late

Carrier accounts for 50% of the 2,877 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
50%
Late-arriving aircraft
41%
National Airspace System
9%

41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,877 reported delay minutes here, that single category outweighs weather by 41 to one. The split is drawn from 2,877 delay minutes reported on DL 705.

Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

5.1% 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 about an hour, which a normal layover absorbs.

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 364 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. 364 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 86.5% on time with 1.92% cancelled over 364 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures