Flight number record
DL 1087
Delta Air Lines · Salt Lake City to Los Angeles
- Route
- SLC → LAX
- Departs
- 07:45
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1087, check with Delta Air Lines.
DL 1087 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 362 flights, with a median arrival 11 minutes early.
Set against the rest of the country, DL 1087's record is 14 points better than the US average of 77.3%. That gap is worth roughly 138 fewer late arrivals for every thousand flights.
Key figures
On time
91.1%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
0.83%
National rate is 1.89%
1 hour+ late
1.7%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. The median arrival is 11 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 1087 flies
DL 1087 flies SLC to LAX without a single fixed slot. Its most common scheduled departure was 07:45, used on 251 of 362 flights.
- Departs 07:45251 flights69.3%
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 07:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1087 runs level with that at 91.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1087 next to SLC to LAX
Every carrier on SLC to LAX combined arrived on time 85.6% of the time across 4,196 flights, so DL 1087 is 6 points ahead of it. Delta flew 2,459 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 81.1%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1087thin sample | 362 | 91.1% | 48 min | 0.83% | A+ |
| All Delta Air Lines on SLC–LAX | 2,459 | 83.5% | 52 min | 0.53% | B+ |
| All carriers on SLC–LAX | 4,196 | 85.6% | 55 min | 0.48% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1087 quarter by quarter
DL 1087 did not run the same all year. Its best quarter was Jan–Mar 2026 at 94.3% on time and its weakest Jul–Sep 2026 at 82.3%, a swing of 12 points on roughly 72 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 flights86.7%
- Oct–Dec 202590 flights93.3%
- Jan–Mar 202689 flights94.3%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights82.3%
Scale runs 75% to 100%.
By weekday, DL 1087 ranged from 86.3% on Sunday to 98.0% 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.
Arrival by arrival
How late DL 1087 runs when it is late
DL 1087 often beats the schedule: 131 of 359 completed flights, 36%, arrived 15 minutes or more early. The 32 late arrivals split 10 under half an hour, 16 between 30 and 60 minutes, and 6 an hour or more.
- 15+ min early131 flights36.5%
- Within 15 min196 flights54.6%
- 15–29 min late10 flights2.8%
- 30–59 min late16 flights4.5%
- 1–2 hours late4 flights1.1%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
5 of 28 late departures made up the time and arrived on time, 18% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1087
The latest arrival of the period was on 26 December 2025, 2 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 December 2025 | 2 hours 46 minutes | Carrier |
| 14 May 2026 | 2 hours 31 minutes | Carrier |
| 6 August 2026 | 1 hour 28 minutes | Carrier |
| 11 January 2026 | 1 hour 20 minutes | Carrier |
| 24 July 2026 | 1 hour 6 minutes | Carrier |
Delay causes
Why DL 1087 runs late
Carrier accounts for 79% of the 1,524 delay minutes carriers reported here, and the remaining four split what is left.
- 79%Carrier
- 17%National Airspace System
- 4%Late-arriving aircraft
The largest share of delay minutes, 79%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,197 of the 1,524 delay minutes reported here. The split is drawn from 1,524 delay minutes reported on DL 1087.
Cancellations are rare at 0.83%, 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 1.7% 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.
The 590 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.
Every one of the 362 flights under DL 1087 in the data flew SLC to LAX. 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. 362 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 1087
For a booking, DL 1087 has one of the better records a US domestic flight can show: 91.1% on time and 0.83% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to LAX, every carrier and departure
- LAX to SLC, the return direction
- Delta Air Lines 829 on the same route86.5%
- Delta Air Lines 841 on the same route78.1%
- Delta Air Lines 1142 on the same route73.7%
- Delta Air Lines 1095 on the same route91.1%
- Delta Air Lines 1161 on the same route81.4%
- Salt Lake City International (SLC) delay statistics
- Los Angeles International (LAX) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.