Flight number record

DL 1607

Delta Air Lines · Salt Lake City to Reno

Route: SLC → RNO
Departs: 22:59
Flights: 365
Period: July 2025 to June 2026

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

DL 1607 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. 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 7 points better than the US average of 77.6%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 364 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.81%

1 hour+ late

4.1%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 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.

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 129 of 365 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:59129 flights35.3%

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 22:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1607 runs 14 points better at 84.1%. 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 1607 next to SLC to RNO

Every carrier on SLC to RNO combined arrived on time 87.8% of the time across 1,195 flights, so DL 1607 is 4 points behind it. Delta flew 730 flights on the same city pair under all its flight numbers, including this one, and those ran 85.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 1607 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1607	365	84.1%	68 min	0.27%	B+
All Delta Air Lines on SLC–RNO	730	85.6%	69 min	0.27%	A+
All carriers on SLC–RNO	1,195	87.8%	65 min	0.17%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1607 quarter by quarter

Quarter by quarter DL 1607 held fairly steady: 84.8% in Jul–Sep 2025, 86.8% in Oct–Dec 2025, 86.7% in Jan–Mar 2026 and 78.0% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights84.8%
Oct–Dec 202592 flights86.8%
Jan–Mar 202690 flights86.7%
Apr–Jun 202691 flights78.0%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1607 ranged from 78.8% on Thursday to 90.4% on Wednesday. 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.

Delay causes

Why DL 1607 runs late

One category carries most of the weight here. Carrier accounts for 66% of the 3,940 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
66%
Late-arriving aircraft
22%
National Airspace System
12%
Extreme weather
1%

The largest share of delay minutes, 66%, 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 2,599 of the 3,940 delay minutes reported here. The split is drawn from 3,940 delay minutes reported on DL 1607.

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

Badly late arrivals are rare here: only 4.1% 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.

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, read DL 1607 as 84.1% on time with 0.27% cancelled over 365 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