Flight number record
DL 696
Delta Air Lines · Salt Lake City to Boston
- Route
- SLC → BOS
- Departs
- 23:31
- Flights
- 337
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 696, check with Delta Air Lines.
DL 696 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 about 35 minutes. That rests on 337 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 696'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 331 completed flights
Avg delay
36 min
Across delayed arrivals only, not all flights
Cancelled
1.78%
National rate is 1.89%
1 hour+ late
1.5%
National rate is 8.3%
These figures cover 337 flights between September 2025 and August 2026. The median arrival is 12 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 696 flies
DL 696 flies SLC to BOS without a single fixed slot. Its most common scheduled departure was 23:31, used on 65 of 337 flights, with 23:59 (45 flights) next.
- Departs 23:3165 flights19.3%
- Departs 23:5945 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 23:31 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 696 runs 21 points better at 91.2%. 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 696 next to SLC to BOS
Every carrier on SLC to BOS combined arrived on time 80.6% of the time across 1,264 flights, so DL 696 is 11 points ahead of it. Delta flew 1,083 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 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 696thin sample | 337 | 91.2% | 36 min | 1.78% | A |
| All Delta Air Lines on SLC–BOS | 1,083 | 82.7% | 59 min | 1.29% | B |
| All carriers on SLC–BOS | 1,264 | 80.6% | 62 min | 1.98% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 696 quarter by quarter
Quarter by quarter DL 696 held fairly steady: 93.3% in Jul–Sep 2025, 92.9% in Oct–Dec 2025, 87.7% in Jan–Mar 2026, 91.1% in Apr–Jun 2026 and 91.8% in Jul–Sep 2026. A spread of 6 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 202586 flights92.9%
- Jan–Mar 202669 flights87.7%
- Apr–Jun 202691 flights91.1%
- Jul–Sep 202661 flights91.8%
Scale runs 80% to 100%.
By weekday, DL 696 did best on Wednesday at 100.0% on time and worst on Sunday at 82.0%. Each day rests on about 48 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 696 runs when it is late
DL 696 often beats the schedule: 148 of 331 completed flights, 45%, arrived 15 minutes or more early. Most of the lateness is short. 19 of the 29 late arrivals were under half an hour behind, and 5 reached an hour or more. Not one arrived two hours late.
- 15+ min early148 flights44.7%
- Within 15 min154 flights46.5%
- 15–29 min late19 flights5.7%
- 30–59 min late5 flights1.5%
- 1–2 hours late5 flights1.5%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 331 completed flights by arrival against schedule.
5 of 22 late departures made up the time and arrived on time, 23% of them. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 696
The latest arrival of the period was on 16 March 2026, 1 hour 31 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 |
|---|---|---|
| 16 March 2026 | 1 hour 31 minutes | Carrier |
| 8 March 2026 | 1 hour 28 minutes | Carrier |
| 27 October 2025 | 1 hour 26 minutes | Carrier |
| 30 July 2026 | 1 hour 20 minutes | Late-arriving aircraft |
| 29 December 2025 | 1 hour 5 minutes | Late-arriving aircraft |
Delay causes
Why DL 696 runs late
Carrier accounts for 46% of the 1,039 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 28%National Airspace System
- 26%Late-arriving aircraft
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 479 of the 1,039 delay minutes reported here. The split is drawn from 1,039 delay minutes reported on DL 696.
Cancellations sit at 1.78% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.5% 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.
At 2,105 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 337 flights under DL 696 in the data flew SLC to BOS. 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. 337 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 696
For a booking, read DL 696 as 91.2% on time with 1.78% cancelled over 337 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to BOS, every carrier and departure
- BOS to SLC, the return direction
- Delta Air Lines 657 on the same route81.2%
- Delta Air Lines 702 on the same route76.3%
- Salt Lake City International (SLC) delay statistics
- Boston Logan International (BOS) 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.