Flight number record

DL 920

Delta Air Lines · San Francisco to Salt Lake City

Route: SFO → SLC
Departs: 09:55
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 920, check with Delta Air Lines.

DL 920 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 about an hour on average. That is a workable record, not a spotless one. That rests on 361 flights, with a median arrival 10 minutes early.

On time

78.1%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

1.39%

National rate is 1.81%

1 hour+ late

7.6%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. The median arrival is 10 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 920 flies

DL 920 flies SFO to SLC without a single fixed slot. Its most common scheduled departure was 09:55, used on 75 of 361 flights, with 09:50 (57 flights) and 09:46 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:5575 flights20.8%
Departs 09:5057 flights15.8%
Departs 09:4639 flights10.8%

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 09:55 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 920 runs 6 points worse at 78.1%. 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 920 next to SFO to SLC

Every carrier on SFO to SLC combined arrived on time 77.2% of the time across 3,471 flights, so DL 920 is about level with it. Delta flew 1,708 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 920 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 920thin sample	361	78.1%	65 min	1.39%	B
All Delta Air Lines on SFO–SLC	1,708	78.1%	77 min	0.88%	B+
All carriers on SFO–SLC	3,471	77.2%	70 min	0.89%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 920 quarter by quarter

DL 920 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.2% on time and its weakest Apr–Jun 2026 at 62.9%, a swing of 22 points on roughly 90 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 flights81.5%
Oct–Dec 202588 flights85.2%
Jan–Mar 202690 flights82.8%
Apr–Jun 202691 flights62.9%

Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 920 ranged from 72.0% on Monday to 83.0% on Tuesday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 920 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 69% of the 5,057 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.

Late-arriving aircraft
69%
Carrier
24%
National Airspace System
6%
Extreme weather
1%

69% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,057 reported delay minutes here, that single category outweighs weather by 69 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,057 delay minutes reported on DL 920.

Cancellations sit at 1.39% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.6% 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.

The 599 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.

DL 920 is not only a SFO to SLC flight. It also flew SLC to SFO (361 flights, 67.7% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 361 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.

Other routes flown as DL 920
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to SFOthin sample	361	67.7%	47 min	1.39%	C

What to do with this

Booking DL 920

For a booking, read DL 920 as 78.1% on time with 1.39% cancelled over 361 flights. Those are rates from the past twelve months, not a forecast for any particular 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