Carrier route record

DLBUR→SLC

Delta Air Lines · Burbank to Salt Lake City

Flights: 394
Period: July 2025 to June 2026
Share of route: 27%
Carriers: 3

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

Delta on BUR to SLC 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.9 hours. That rests on 394 flights, with a median arrival 17 minutes early.

Set against the rest of the country, Delta's BUR to SLC record is 15 points better than the US average of 77.6%. That gap is worth roughly 145 fewer late arrivals for every thousand flights.

On time

92.1%

Arrivals under 15 minutes late, of 392 completed flights

Avg delay

172 min

Across delayed arrivals only, not all flights

Cancelled

0.51%

National rate is 1.81%

Whole route

90.9%

Every carrier on BUR to SLC, 1,484 flights

These figures cover 394 flights between July 2025 and June 2026. The median arrival is 17 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.

Carrier by carrier

Delta against every carrier on BUR to SLC

Delta flew 394 of the 1,484 flights on BUR to SLC, about 27% of it. Its 92.1% on time is about level with the route as a whole at 90.9%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from SkyWest at 92.3% to Southwest at 76.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on BUR to SLC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines	962	92.3%	69 min	0.52%	A+
Delta Air Lines (this page)	394	92.1%	172 min	0.51%	A+
Southwest Airlinesthin sample	128	76.6%	57 min	0.00%	B+

Flight by flight

Delta flight numbers on BUR to SLC

DL 258207:0093.3% · 314 flights

Departure window

When Delta runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 394 flights.

5am–8am330 flights93.3%
8am–11am—
11am–2pm60 flights86.7%
2pm–5pm4 flights—
5pm–8pm—
8pm–5am—

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 86.7% on time against 93.3% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5am–8am window is the busiest, with 330 flights scheduled in it.

Across the year

Delta on BUR to SLC through the year

Darker means more delays. Figures are on-time percentages.June best, August worst

August is the worst month at 83.9% on time, 16 points below June, the best at 100.0%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 55 flights.

Across the week, Tuesday is the strongest day at 94.3% on time and Thursday the weakest at 89.3%. 5 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Delta runs late on this route

One category carries most of the weight here. Carrier accounts for 46% of the 5,334 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
46%
Late-arriving aircraft
28%
Extreme weather
20%
National Airspace System
6%

Extreme weather accounts for 20% 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 monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.3 times the usual weather exposure. The split is drawn from 5,334 reported delay minutes.

The largest share of delay minutes, 46%, 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 2,452 of the 5,334 delay minutes reported here.

Cancellations are rare at 0.51%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.1% 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.

The 574 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg is a different operation and performs like one: it runs 81.6% on time across 394 flights, 11 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 11 points of difference.

One caution: this is a thin sample. 394 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 Delta on BUR to SLC

Put together: treat all of this as provisional. 394 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 92.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 392 completed flights over 12 months sit behind that.

Where to go next

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