Flight number record
DL 2335
Delta Air Lines · Idaho Falls to Salt Lake City
- Route
- IDA → SLC
- Departs
- 06:00
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2335, check with Delta Air Lines.
DL 2335 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.9 hours. That rests on 317 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 2335's record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 313 completed flights
Avg delay
175 min
Across delayed arrivals only, not all flights
Cancelled
1.26%
National rate is 1.89%
1 hour+ late
4.5%
National rate is 8.3%
These figures cover 317 flights between September 2025 and August 2026. The median arrival is 8 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 2335 flies
DL 2335 flies IDA to SLC without a single fixed slot. Its most common scheduled departure was 06:00, used on 215 of 317 flights, with 05:25 (62 flights) next.
- Departs 06:00215 flights67.8%
- Departs 05:2562 flights19.6%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 2335 runs level with that at 89.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 2335 next to IDA to SLC
Every carrier on IDA to SLC combined arrived on time 91.8% of the time across 1,195 flights, so DL 2335 is 2 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2335thin sample | 317 | 89.8% | 175 min | 1.26% | A |
| All Delta Air Lines on IDA–SLCthin sample | 317 | 89.8% | 175 min | 1.26% | A |
| All carriers on IDA–SLC | 1,195 | 91.8% | 109 min | 0.42% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2335 quarter by quarter
DL 2335 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Oct–Dec 2025 at 83.3%, a swing of 17 points on roughly 63 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 flights100.0%
- Oct–Dec 202580 flights83.3%
- Jan–Mar 202666 flights89.2%
- Apr–Jun 202679 flights86.1%
- Jul–Sep 202662 flights98.4%
Scale runs 75% to 100%.
By weekday, DL 2335 did best on Tuesday at 95.6% on time and worst on Wednesday at 82.2%. Each day rests on about 45 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2335 runs when it is late
DL 2335 often beats the schedule: 87 of 313 completed flights, 28%, arrived 15 minutes or more early. The 32 late arrivals split 14 under half an hour, 4 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early87 flights27.8%
- Within 15 min194 flights62.0%
- 15–29 min late14 flights4.5%
- 30–59 min late4 flights1.3%
- 1–2 hours late4 flights1.3%
- 2+ hours late10 flights3.2%
Scale runs 0% to 100%.
Share of 313 completed flights by arrival against schedule.
4 of 27 late departures made up the time and arrived on time, 15% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 2335
The latest arrival of the period was on 28 May 2026, 16 hours 26 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 |
|---|---|---|
| 28 May 2026 | 16 hours 26 minutes | Carrier |
| 20 February 2026 | 14 hours 5 minutes | Carrier |
| 3 December 2025 | 14 hours 4 minutes | Carrier |
| 19 December 2025 | 12 hours 42 minutes | Carrier |
| 12 February 2026 | 5 hours 13 minutes | Extreme weather |
Delay causes
Why DL 2335 runs late
Carrier accounts for 89% of the 5,589 delay minutes carriers reported here, and the remaining four split what is left.
- 89%Carrier
- 7%Extreme weather
- 4%National Airspace System
The largest share of delay minutes, 89%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,967 of the 5,589 delay minutes reported here. The split is drawn from 5,589 delay minutes reported on DL 2335.
Cancellations sit at 1.26% 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 4.5% 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.
Every one of the 317 flights under DL 2335 in the data flew IDA 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. 317 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 2335
For a booking, DL 2335 has one of the better records a US domestic flight can show: 89.8% on time and 1.26% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IDA to SLC, every carrier and departure
- SLC to IDA, the return direction
- SkyWest Airlines 3895 on the same route90.9%
- 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.