Flight number record
DL 2608
Delta Air Lines · Salt Lake City to Idaho Falls
- Route
- SLC → IDA
- Departs
- 21:30
- Flights
- 317
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2608, check with Delta Air Lines.
DL 2608 lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 317 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 2608's record is 4 points better than the US average of 77.3%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.
Key figures
On time
81.4%
Arrivals under 15 minutes late, of 312 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.26%
National rate is 1.89%
1 hour+ late
7.1%
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.
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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 129 of 317 flights, with 21:15 (92 flights) and 21:40 (55 flights) next.
- Departs 21:30129 flights40.7%
- Departs 21:1592 flights29.0%
- Departs 21:4055 flights17.4%
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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2608 runs 11 points better at 81.4%. 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 2608 next to SLC to IDA
Every carrier on SLC to IDA combined arrived on time 89.6% of the time across 1,195 flights, so DL 2608 is 8 points behind it. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2608thin sample | 317 | 81.4% | 64 min | 1.26% | B |
| All Delta Air Lines on SLC–IDAthin sample | 317 | 81.4% | 64 min | 1.26% | B |
| All carriers on SLC–IDA | 1,195 | 89.6% | 67 min | 0.42% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 Oct–Dec 2025 at 71.8%, a swing of 19 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 flights76.7%
- Oct–Dec 202580 flights71.8%
- Jan–Mar 202665 flights82.5%
- Apr–Jun 202680 flights91.2%
- Jul–Sep 202662 flights82.0%
Scale runs 65% to 95%.
By weekday, DL 2608 did best on Wednesday at 88.4% on time and worst on Friday at 71.1%. Each day rests on about 45 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2608 runs when it is late
DL 2608 often beats the schedule: 78 of 312 completed flights, 25%, arrived 15 minutes or more early. The 58 late arrivals split 14 under half an hour, 22 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early78 flights25.0%
- Within 15 min176 flights56.4%
- 15–29 min late14 flights4.5%
- 30–59 min late22 flights7.1%
- 1–2 hours late18 flights5.8%
- 2+ hours late4 flights1.3%
Scale runs 0% to 100%.
Share of 312 completed flights by arrival against schedule.
8 of 59 late departures made up the time and arrived on time, 14% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for DL 2608
The latest arrival of the period was on 29 July 2026, 10 hours 30 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across July, December, January and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 July 2026 | 10 hours 30 minutes | Extreme weather |
| 14 December 2025 | 3 hours 1 minute | Late-arriving aircraft |
| 2 January 2026 | 2 hours 49 minutes | Carrier |
| 24 October 2025 | 2 hours 17 minutes | Late-arriving aircraft |
| 19 July 2026 | 1 hour 34 minutes | Carrier |
Delay causes
Why DL 2608 runs late
Carrier accounts for 50% of the 3,699 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 22%Late-arriving aircraft
- 19%Extreme weather
- 10%National Airspace System
Extreme weather accounts for 19% 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 3.1 times the usual weather exposure. The split is drawn from 3,699 delay minutes reported on DL 2608.
Cancellations sit at 1.26% against a national 1.89%, which is ordinary. Diversions add another 0.32%.
Connections and routes
What a delay on this flight costs
7.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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: 8 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.
Related
Where to go next
- SLC to IDA, every carrier and departure
- IDA to SLC, the return direction
- SkyWest Airlines 3895 on the same route89.4%
- 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.