Flight number record

DL 2608

Delta Air Lines · Salt Lake City to Idaho Falls

Route: SLC → IDA
Departs: 21:30
Flights: 317
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2608, check with Delta Air Lines.

DL 2608 lands a B+, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 317 flights, with a median arrival 7 minutes early.

On time

78.0%

Arrivals under 15 minutes late, of 313 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

0.95%

National rate is 1.81%

1 hour+ late

9.3%

National rate is 8.1%

These figures cover 317 flights between July 2025 and June 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 2608 flies

DL 2608 flies SLC to IDA without a single fixed slot. Its most common scheduled departure was 21:30, used on 123 of 317 flights, with 21:15 (92 flights) and 21:40 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:30123 flights38.8%
Departs 21:1592 flights29.0%
Departs 21:4055 flights17.4%

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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2608 runs 8 points better at 78.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2608 next to SLC to IDA

Every carrier on SLC to IDA combined arrived on time 89.3% of the time across 1,189 flights, so DL 2608 is 11 points behind it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 2608 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2608thin sample	317	78.0%	69 min	0.95%	B+
All Delta Air Lines on SLC–IDAthin sample	317	78.0%	69 min	0.95%	B+
All carriers on SLC–IDA	1,189	89.3%	72 min	0.34%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2608 quarter by quarter

DL 2608 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.2% on time and its weakest Jul–Sep 2025 at 68.5%, a swing of 23 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 flights68.5%
Oct–Dec 202580 flights71.8%
Jan–Mar 202665 flights82.5%
Apr–Jun 202680 flights91.2%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2608 did best on Saturday at 86.4% on time and worst on Friday at 66.7%. Each day rests on about 45 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2608 runs late

One category carries most of the weight here. Carrier accounts for 63% of the 4,758 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
63%
Late-arriving aircraft
21%
Extreme weather
11%
National Airspace System
5%

Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 4,758 delay minutes reported on DL 2608.

Cancellations sit at 0.95% against a national 1.81%, which is ordinary. Diversions add another 0.32%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

Every one of the 317 flights under DL 2608 in the data flew SLC to IDA. 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 2608

For a booking, DL 2608 is one of the weaker ways to fly SLC to IDA: 11 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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