Flight number record
DL 2363
Delta Air Lines · St. Louis to Salt Lake City
- Route
- STL → SLC
- Departs
- 07:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2363, check with Delta Air Lines.
DL 2363 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 close to two hours. That rests on 365 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 2363's record is 14 points better than the US average of 77.3%. That gap is worth roughly 139 fewer late arrivals for every thousand flights.
Key figures
On time
91.2%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
112 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
3.0%
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 2363 flies
DL 2363 flies STL to SLC without a single fixed slot. Its most common scheduled departure was 07:00, used on 92 of 365 flights, with 08:00 (86 flights) next.
- Departs 07:0092 flights25.2%
- Departs 08:0086 flights23.6%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2363 runs level with that at 91.2%. 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 2363 next to STL to SLC
Every carrier on STL to SLC combined arrived on time 86.8% of the time across 990 flights, so DL 2363 is 4 points ahead of it. Delta flew 981 flights on the same city pair under all its flight numbers, including this one, and those ran 87.0% 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 2363 | 365 | 91.2% | 112 min | 0.82% | A+ |
| All Delta Air Lines on STL–SLC | 981 | 87.0% | 103 min | 0.92% | A+ |
| All carriers on STL–SLC | 990 | 86.8% | 102 min | 0.91% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2363 quarter by quarter
Quarter by quarter DL 2363 held fairly steady: 90.0% in Jul–Sep 2025, 85.7% in Oct–Dec 2025, 91.0% in Jan–Mar 2026, 94.5% in Apr–Jun 2026 and 95.1% in Jul–Sep 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 202530 flights90.0%
- Oct–Dec 202592 flights85.7%
- Jan–Mar 202690 flights91.0%
- Apr–Jun 202691 flights94.5%
- Jul–Sep 202662 flights95.1%
Scale runs 75% to 100%.
By weekday, DL 2363 did best on Tuesday at 96.2% on time and worst on Saturday at 80.8%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2363 runs when it is late
DL 2363 often beats the schedule: 122 of 362 completed flights, 34%, arrived 15 minutes or more early. The 32 late arrivals split 13 under half an hour, 8 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early122 flights33.7%
- Within 15 min208 flights57.5%
- 15–29 min late13 flights3.6%
- 30–59 min late8 flights2.2%
- 1–2 hours late4 flights1.1%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
6 of 34 late departures made up the time and arrived on time, 18% of them. Only 4 left on time and still arrived late.
The worst days
Worst days for DL 2363
The latest arrival of the period was on 5 February 2026, 15 hours 10 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 February 2026 | 15 hours 10 minutes | Carrier |
| 28 March 2026 | 7 hours 35 minutes | Carrier |
| 8 November 2025 | 6 hours 57 minutes | Extreme weather |
| 8 July 2026 | 6 hours 11 minutes | Carrier |
| 25 September 2025 | 3 hours 37 minutes | Extreme weather |
Delay causes
Why DL 2363 runs late
Carrier accounts for 73% of the 3,571 delay minutes carriers reported here, and the remaining four split what is left.
- 73%Carrier
- 24%Extreme weather
- 4%National Airspace System
Extreme weather accounts for 24% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.9 times the usual weather exposure. The split is drawn from 3,571 delay minutes reported on DL 2363.
Cancellations are rare at 0.82%, 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 3.0% 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 1,156 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 2363 in the data flew STL to SLC. 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 2363
For a booking, DL 2363 has one of the better records a US domestic flight can show: 91.2% on time and 0.82% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- STL to SLC, every carrier and departure
- SLC to STL, the return direction
- Delta Air Lines 1492 on the same route82.2%
- Delta Air Lines 2455 on the same route88.4%
- St. Louis Lambert International (STL) delay statistics
- Salt Lake City International (SLC) 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.