Flight number record

DL 1607

Delta Air Lines · Salt Lake City to Reno

Route: SLC → RNO
Departs: 22:59
Flights: 365
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1607, check with Delta Air Lines.

DL 1607 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 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 365 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 1607's record is 8 points better than the US average of 77.3%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.

On time

85.2%

Arrivals under 15 minutes late, of 364 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.89%

1 hour+ late

4.1%

National rate is 8.3%

These figures cover 365 flights between September 2025 and August 2026. The median arrival is 9 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 1607 flies

DL 1607 flies SLC to RNO without a single fixed slot. Its most common scheduled departure was 22:59, used on 117 of 365 flights, with 23:20 (49 flights) next.

Departs 22:59117 flights32.1%
Departs 23:2049 flights13.4%

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 22:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1607 runs 15 points better at 85.2%. 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 1607 next to SLC to RNO

Every carrier on SLC to RNO combined arrived on time 87.7% of the time across 1,201 flights, so DL 1607 is 3 points behind it. Delta flew 730 flights on the same city pair under all its flight numbers, including this one, and those ran 86.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.

DL 1607 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1607	365	85.2%	61 min	0.27%	A+
All Delta Air Lines on SLC–RNO	730	86.1%	64 min	0.27%	A+
All carriers on SLC–RNO	1,201	87.7%	65 min	0.17%	A+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 1607 quarter by quarter

DL 1607 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Apr–Jun 2026 at 78.0%, a swing of 19 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 flights96.7%
Oct–Dec 202592 flights86.8%
Jan–Mar 202690 flights86.7%
Apr–Jun 202691 flights78.0%
Jul–Sep 202662 flights85.5%

Scale runs 70% to 100%.

By weekday, DL 1607 ranged from 80.8% on Sunday to 92.3% on Tuesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late DL 1607 runs when it is late

DL 1607 often beats the schedule: 104 of 364 completed flights, 29%, arrived 15 minutes or more early. The 54 late arrivals split 22 under half an hour, 17 between 30 and 60 minutes, and 15 an hour or more.

15+ min early104 flights28.6%
Within 15 min206 flights56.6%
15–29 min late22 flights6.0%
30–59 min late17 flights4.7%
1–2 hours late11 flights3.0%
2+ hours late4 flights1.1%

Scale runs 0% to 100%.

Share of 364 completed flights by arrival against schedule.

A late pushback is often recovered here: of 62 departures that left 15 minutes late or more, 22 still arrived on time. 14 flights left on time and still arrived late.

The worst days

Worst days for DL 1607

The latest arrival of the period was on 29 November 2025, 9 hours 20 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of DL 1607 in the period
Date	Arrived late by	Largest filed cause
29 November 2025	9 hours 20 minutes	Carrier
24 June 2026	7 hours 23 minutes	Carrier
7 June 2026	2 hours 33 minutes	Late-arriving aircraft
16 July 2026	2 hours 10 minutes	Late-arriving aircraft
29 May 2026	1 hour 40 minutes	Late-arriving aircraft

Delay causes

Why DL 1607 runs late

Carrier accounts for 58% of the 3,301 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
58%
Late-arriving aircraft
27%
National Airspace System
14%
Extreme weather
1%

The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,910 of the 3,301 delay minutes reported here. The split is drawn from 3,301 delay minutes reported on DL 1607.

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

Badly late arrivals are rare here: only 4.1% land an hour or more behind schedule, against 8.3% 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.

Every one of the 365 flights under DL 1607 in the data flew SLC to RNO. 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 1607

For a booking, DL 1607 has one of the better records a US domestic flight can show: 85.2% on time and 0.27% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures