Flight number record

DL 2111

Delta Air Lines · Salt Lake City to Boise

Route: SLC → BOI
Departs: 21:50
Flights: 347
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2111, check with Delta Air Lines.

DL 2111 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 347 flights, with a median arrival 8 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 342 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.44%

National rate is 1.81%

1 hour+ late

5.8%

National rate is 8.1%

These figures cover 347 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 2111 flies

DL 2111 flies SLC to BOI without a single fixed slot. Its most common scheduled departure was 21:50, used on 58 of 347 flights, with 22:50 (55 flights) and 22:45 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:5058 flights16.7%
Departs 22:5055 flights15.9%
Departs 22:4552 flights15.0%

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 21:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2111 runs 11 points better at 81.0%. 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 2111 next to SLC to BOI

Every carrier on SLC to BOI combined arrived on time 87.1% of the time across 1,742 flights, so DL 2111 is 6 points behind it. Delta flew 1,223 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2111 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2111thin sample	347	81.0%	62 min	1.44%	B
All Delta Air Lines on SLC–BOI	1,223	84.7%	59 min	1.06%	B
All carriers on SLC–BOI	1,742	87.1%	57 min	0.80%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2111 quarter by quarter

Quarter by quarter DL 2111 held fairly steady: 83.3% in Jul–Sep 2025, 84.3% in Oct–Dec 2025, 79.3% in Jan–Mar 2026 and 77.3% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202584 flights83.3%
Oct–Dec 202585 flights84.3%
Jan–Mar 202687 flights79.3%
Apr–Jun 202691 flights77.3%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2111 did best on Tuesday at 94.3% on time and worst on Friday at 72.0%. Each day rests on about 50 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2111 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 4,012 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
58%
Late-arriving aircraft
27%
National Airspace System
11%
Extreme weather
4%

The largest share of delay minutes, 58%, 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 2,346 of the 4,012 delay minutes reported here. The split is drawn from 4,012 delay minutes reported on DL 2111.

Cancellations sit at 1.44% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.8% 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 an hour, which a normal layover absorbs.

Every one of the 347 flights under DL 2111 in the data flew SLC to BOI. 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. 347 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 2111

For a booking, DL 2111 is one of the weaker ways to fly SLC to BOI: 6 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