Flight number record

DL 2335

Delta Air Lines · Idaho Falls to Salt Lake City

Route: IDA → SLC
Departs: 06:00
Flights: 317
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.8 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 11 points better than the US average of 77.6%. That gap is worth roughly 106 fewer late arrivals for every thousand flights.

On time

88.2%

Arrivals under 15 minutes late, of 314 completed flights

Avg delay

167 min

Across delayed arrivals only, not all flights

Cancelled

0.95%

National rate is 1.81%

1 hour+ late

5.4%

National rate is 8.1%

These figures cover 317 flights between July 2025 and June 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.

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. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00215 flights67.8%
Departs 05:2562 flights19.6%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 88.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2335 next to IDA to SLC

Every carrier on IDA to SLC combined arrived on time 91.6% of the time across 1,189 flights, so DL 2335 is 3 points behind it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 2335 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2335thin sample	317	88.2%	167 min	0.95%	A+
All Delta Air Lines on IDA–SLCthin sample	317	88.2%	167 min	0.95%	A+
All carriers on IDA–SLC	1,189	91.6%	106 min	0.34%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 93.5% on time and its weakest Oct–Dec 2025 at 83.3%, a swing of 10 points on roughly 79 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 202592 flights93.5%
Oct–Dec 202580 flights83.3%
Jan–Mar 202666 flights89.2%
Apr–Jun 202679 flights86.1%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2335 did best on Sunday at 95.5% on time and worst on Wednesday at 80.0%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2335 runs late

One category carries most of the weight here. Carrier accounts for 86% of the 6,170 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
86%
Extreme weather
6%
Late-arriving aircraft
4%
National Airspace System
4%

The largest share of delay minutes, 86%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,277 of the 6,170 delay minutes reported here. The split is drawn from 6,170 delay minutes reported on DL 2335.

Cancellations sit at 0.95% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.8 hours, which a normal layover absorbs.

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: 88.2% on time and 0.95% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures