Flight number record
DL 2874
Delta Air Lines · Salt Lake City to Seattle
- Route
- SLC → SEA
- Departs
- 07:45
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2874, check with Delta Air Lines.
DL 2874 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 365 flights, with a median arrival 11 minutes early.
Set against the rest of the country, DL 2874's record is 15 points better than the US average of 77.3%. That gap is worth roughly 153 fewer late arrivals for every thousand flights.
Key figures
On time
92.6%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 365 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 2874 flies
DL 2874 flies SLC to SEA without a single fixed slot. Its most common scheduled departure was 07:45, used on 139 of 365 flights, with 07:50 (82 flights) and 07:55 (49 flights) next.
- Departs 07:45139 flights38.1%
- Departs 07:5082 flights22.5%
- Departs 07:5549 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 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 2874 runs 3 points better at 92.6%. 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 2874 next to SLC to SEA
Every carrier on SLC to SEA combined arrived on time 79.9% of the time across 4,098 flights, so DL 2874 is 13 points ahead of it. Delta flew 2,234 flights on the same city pair under all its flight numbers, including this one, and those ran 82.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2874 | 365 | 92.6% | 52 min | 0.27% | A+ |
| All Delta Air Lines on SLC–SEA | 2,234 | 82.7% | 53 min | 0.49% | B+ |
| All carriers on SLC–SEA | 4,098 | 79.9% | 55 min | 0.81% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2874 quarter by quarter
Quarter by quarter DL 2874 held fairly steady: 93.3% in Jul–Sep 2025, 90.2% in Oct–Dec 2025, 93.3% in Jan–Mar 2026, 93.4% in Apr–Jun 2026 and 93.5% in Jul–Sep 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights90.2%
- Jan–Mar 202690 flights93.3%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights93.5%
Scale runs 80% to 100%.
By weekday, DL 2874 ranged from 88.5% on Sunday to 96.2% on Wednesday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2874 runs when it is late
DL 2874 often beats the schedule: 137 of 364 completed flights, 38%, arrived 15 minutes or more early. The 27 late arrivals split 7 under half an hour, 11 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early137 flights37.6%
- Within 15 min200 flights54.9%
- 15–29 min late7 flights1.9%
- 30–59 min late11 flights3.0%
- 1–2 hours late7 flights1.9%
- 2+ hours late2 flights0.5%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
A late pushback is often recovered here: of 25 departures that left 15 minutes late or more, 8 still arrived on time. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2874
The latest arrival of the period was on 17 March 2026, 2 hours 36 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 March 2026 | 2 hours 36 minutes | Late-arriving aircraft |
| 25 June 2026 | 2 hours 15 minutes | Carrier |
| 1 December 2025 | 1 hour 35 minutes | Carrier |
| 31 July 2026 | 1 hour 30 minutes | Carrier |
| 11 January 2026 | 1 hour 27 minutes | Carrier |
Delay causes
Why DL 2874 runs late
Carrier accounts for 61% of the 1,395 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 23%National Airspace System
- 11%Late-arriving aircraft
- 5%Extreme weather
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 851 of the 1,395 delay minutes reported here. The split is drawn from 1,395 delay minutes reported on DL 2874.
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 2.5% 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 689 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 365 flights under DL 2874 in the data flew SLC to SEA. 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 2874
For a booking, DL 2874 has one of the better records a US domestic flight can show: 92.6% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to SEA, every carrier and departure
- SEA to SLC, the return direction
- Delta Air Lines 2995 on the same route87.1%
- Delta Air Lines 2817 on the same route77.3%
- Delta Air Lines 871 on the same route80.3%
- Alaska Airlines 796 on the same route83.9%
- Delta Air Lines 2921 on the same route84.0%
- Alaska Airlines 734 on the same route65.9%
- Salt Lake City International (SLC) delay statistics
- Seattle-Tacoma International (SEA) 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.