Flight number record
DL 1373
Delta Air Lines · Salt Lake City to Portland
- Route
- SLC → PDX
- Departs
- 22:50
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1373, check with Delta Air Lines.
DL 1373 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 40 minutes. That rests on 348 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 1373's record is 9 points better than the US average of 77.3%. That gap is worth roughly 89 fewer late arrivals for every thousand flights.
Key figures
On time
86.2%
Arrivals under 15 minutes late, of 348 completed flights
Avg delay
41 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
2.6%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. The median arrival is 7 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 1373 flies
DL 1373 flies SLC to PDX without a single fixed slot. Its most common scheduled departure was 22:50, used on 138 of 348 flights, with 22:45 (78 flights) and 21:45 (74 flights) next.
- Departs 22:50138 flights39.7%
- Departs 22:4578 flights22.4%
- Departs 21:4574 flights21.3%
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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1373 runs 16 points better at 86.2%. 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 1373 next to SLC to PDX
Every carrier on SLC to PDX combined arrived on time 87.9% of the time across 2,384 flights, so DL 1373 is 2 points behind it. Delta flew 1,695 flights on the same city pair under all its flight numbers, including this one, and those ran 87.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1373thin sample | 348 | 86.2% | 41 min | 0.00% | A+ |
| All Delta Air Lines on SLC–PDX | 1,695 | 87.9% | 53 min | 1.42% | A |
| All carriers on SLC–PDX | 2,384 | 87.9% | 56 min | 1.13% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1373 quarter by quarter
DL 1373 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 75.8%, a swing of 18 points on roughly 70 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 flights93.3%
- Oct–Dec 202579 flights87.3%
- Jan–Mar 202686 flights89.5%
- Apr–Jun 202691 flights86.8%
- Jul–Sep 202662 flights75.8%
Scale runs 65% to 100%.
By weekday, DL 1373 did best on Tuesday at 98.0% on time and worst on Sunday at 77.6%. Each day rests on about 50 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1373 runs when it is late
Most of the lateness is short. 25 of the 48 late arrivals were under half an hour behind, and 9 reached an hour or more.
- 15+ min early76 flights21.8%
- Within 15 min224 flights64.4%
- 15–29 min late25 flights7.2%
- 30–59 min late14 flights4.0%
- 1–2 hours late7 flights2.0%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 348 completed flights by arrival against schedule.
11 of 52 late departures made up the time and arrived on time, 21% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for DL 1373
The latest arrival of the period was on 15 March 2026, 3 hours 10 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 March 2026 | 3 hours 10 minutes | Carrier |
| 7 December 2025 | 2 hours 9 minutes | Carrier |
| 2 May 2026 | 1 hour 54 minutes | Carrier |
| 25 September 2025 | 1 hour 43 minutes | Late-arriving aircraft |
| 29 July 2026 | 1 hour 29 minutes | Carrier |
Delay causes
Why DL 1373 runs late
Carrier accounts for 70% of the 1,967 delay minutes carriers reported here, and the remaining four split what is left.
- 70%Carrier
- 19%Late-arriving aircraft
- 11%National Airspace System
The largest share of delay minutes, 70%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,381 of the 1,967 delay minutes reported here. The split is drawn from 1,967 delay minutes reported on DL 1373.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are 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 2.6% 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 630 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.
The same number turns up on one other city pair in the data, including DTW to PHL (15), but none flew often enough under DL 1373 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to PDX only.
One caution: this is a thin sample. 348 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 1373
For a booking, DL 1373 has one of the better records a US domestic flight can show: 86.2% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to PDX, every carrier and departure
- PDX to SLC, the return direction
- Delta Air Lines 1209 on the same route87.5%
- Delta Air Lines 1244 on the same route87.8%
- Delta Air Lines 1203 on the same route90.5%
- Salt Lake City International (SLC) delay statistics
- Portland International (PDX) 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.