Airport month record

SLCOCT

Salt Lake City International in October 2025

Departures: 9,841
Month: October 2025
National, same month: 79.7%
Carriers: 9

Historical statistics for October 2025, not live status or a forecast for this year’s October. For today’s conditions at SLC, see live FAA status.

SLC in October earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 6 points better than the national rate of 79.7%. When something does go wrong the average delay runs about an hour. That rests on 9,841 flights, of which SkyWest Airlines flew 3,070 at 92.5% on time.

SkyWest Airlines is the most reliable of the five carriers covered here at 92.5% on time across 3,070 flights.

On time

85.7%

Arrivals under 15 minutes late, of 9,814 completed departures

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.11%

Nationally in October: 0.53%

Whole year

84.8%

SLC across all twelve months

These figures cover 9,841 departures from Salt Lake City International in October 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

October next to SLC's other months

Against SLC's own year, October ran level with the twelve-month rate of 84.8%, which makes it number four of twelve months, best first. Cancellations were unusually low for SLC in October, at 0.11% against 0.76% across the year. Either side of it, September ran 88.2% on time and November 86.5%, so this month sits in line with its neighbours.

SLC month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	10,346	79.5%	69 min	0.67%	B+
August 2025	9,985	84.3%	62 min	0.39%	B+
September 2025	9,344	88.2%	62 min	0.19%	A+
October 2025 (this page)	9,841	85.7%	60 min	0.11%	A+
November 2025	9,197	86.5%	71 min	1.72%	A
December 2025	9,740	83.8%	64 min	0.84%	B+
January 2026	9,515	85.5%	66 min	1.79%	A
February 2026	9,167	85.5%	73 min	0.99%	A+
March 2026	10,632	85.8%	67 min	1.21%	A
April 2026	9,877	84.4%	60 min	0.38%	B+
May 2026	10,146	85.3%	57 min	0.42%	A+
June 2026	10,084	83.3%	64 min	0.48%	B+

Departure window

The best time of day to leave SLC in October

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 10 points, against 15 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am759 flights91.5%
8am–11am1,924 flights90.5%
11am–2pm1,984 flights84.6%
2pm–5pm1,833 flights83.0%
5pm–8pm1,303 flights81.3%
8pm–5am2,038 flights85.4%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.5% of the time, against 81.3% for the evening window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 2,038 flights scheduled in it.

Across the week, Tuesday is the strongest day at 89.4% on time and Monday the weakest at 81.7%. 8 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at SLC in October

The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 92.5% of the time; Southwest Airlines manages 77.6%. Sample sizes sit next to every figure, because a two-point gap across 968 flights means less than a ten-point one.

Carriers at SLC in October 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	4,547	84.1%	57 min	0.04%	B+
SkyWest Airlines	3,070	92.5%	61 min	0.00%	A+
Southwest Airlines	968	77.6%	45 min	0.00%	B+
United Airlines	376	82.6%	51 min	0.53%	B+
American Airlines	367	79.7%	111 min	0.54%	B+
Frontier Airlinesthin sample	322	81.0%	95 min	0.31%	B+
Alaska Airlinesthin sample	118	82.5%	57 min	3.39%	B−
Hawaiian Airlinesthin sample	31	80.6%	55 min	0.00%	B+
JetBlue Airwaysthin sample	31	80.6%	43 min	0.00%	B+

The spread between SkyWest and Southwest is 15 points, wide enough that it should decide the booking. On a hundred trips that is 15 more arrivals inside the on-time window.

Route by route

Busiest routes out of SLC in October

Routes from SLC in October 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
SLC to DEN · Denver	662	79.6%	53 min	0.00%	B+
SLC to PHX · Phoenix	476	79.4%	53 min	0.00%	B+
SLC to SEA · Seattle	367	79.6%	56 min	1.36%	B
SLC to LAX · Los Angelesthin sample	349	85.7%	58 min	0.00%	A+
SLC to DFW · Dallas-Fort Worththin sample	323	79.9%	92 min	0.62%	B+
SLC to LAS · Las Vegasthin sample	320	80.0%	95 min	0.00%	B+
SLC to SFO · San Franciscothin sample	283	70.3%	59 min	0.00%	C+
SLC to ORD · Chicagothin sample	265	79.8%	94 min	0.38%	B+
SLC to ATL · Atlantathin sample	253	92.1%	50 min	0.00%	A+
SLC to SAN · San Diegothin sample	238	80.2%	51 min	0.00%	B+
SLC to PDX · Portlandthin sample	211	90.0%	70 min	0.00%	A+
SLC to SMF · Sacramentothin sample	191	80.1%	67 min	0.00%	B+
SLC to SGU · St. Georgethin sample	178	91.0%	76 min	0.00%	A+
SLC to SJC · San Josethin sample	168	87.5%	43 min	0.00%	A+
SLC to JFK · New Yorkthin sample	157	84.5%	58 min	0.64%	B+
SLC to SNA · Santa Anathin sample	157	78.3%	41 min	0.00%	B+
SLC to BOI · Boisethin sample	155	89.0%	39 min	0.00%	A+
SLC to AUS · Austinthin sample	153	80.8%	54 min	0.00%	B+
SLC to OAK · Oaklandthin sample	150	90.7%	37 min	0.00%	A+
SLC to GEG · Spokanethin sample	146	89.6%	65 min	0.68%	A+
SLC to IAH · Houstonthin sample	146	89.0%	70 min	0.68%	A+
SLC to BUR · Burbankthin sample	138	80.3%	42 min	0.00%	B+
SLC to LGB · Long Beachthin sample	127	88.2%	32 min	0.00%	A+
SLC to DTW · Detroitthin sample	124	94.4%	65 min	0.00%	A+
SLC to MSP · Minneapolisthin sample	124	94.4%	32 min	0.00%	A+

Delay causes

What held SLC up in October

One category carries most of the weight here. Carrier accounts for 48% of the 84,000 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
48%
Late-arriving aircraft
28%
National Airspace System
20%
Extreme weather
4%
Security
0%

The largest share of delay minutes, 48%, 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 40,000 of the 84,000 delay minutes reported here. The split is drawn from 84,039 reported delay minutes.

Cancellations are rare at 0.11%, below the national 0.53% 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.

Badly late arrivals are rare here: only 4.1% land an hour or more behind schedule, against 6.3% 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.

What to do with this

Flying from SLC in October

For a October trip through SLC: expect 85.7% on time and 0.11% cancelled, going by October 2025. The 5am–8am window was the strongest part of the day.

Salt Lake City International (SLC), the whole year
SLC in July79.5%
SLC in August84.3%
SLC in September88.2%
SLC in November86.5%
SLC in December83.8%
SLC in January85.5%
SLC in February85.5%
SLC in March85.8%
SLC in April84.4%
SLC in May85.3%
SLC in June83.3%

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