Airport month record
SLCAPR
Salt Lake City International in April 2026
- Departures
- 9,877
- Month
- April 2026
- National, same month
- 79.8%
- Carriers
- 8
Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at SLC, see live FAA status.
SLC in April earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 5 points better than the national rate of 79.8%. When something does go wrong the average delay runs about an hour. That rests on 9,877 flights, of which SkyWest Airlines flew 3,093 at 87.5% on time.
SkyWest Airlines is the most reliable of the four carriers covered here at 87.5% on time across 3,093 flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 9,814 completed departures
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.38%
Nationally in April: 0.90%
Whole year
84.8%
SLC across all twelve months
These figures cover 9,877 departures from Salt Lake City International in April 2026. 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
April next to SLC's other months
Against SLC's own year, April ran level with the twelve-month rate of 84.8%, which makes it number eight of twelve months, best first. Cancellations were unusually low for SLC in April, at 0.38% against 0.76% across the year. Either side of it, March ran 85.8% on time and May 85.3%, so this month sits in line with its neighbours.
| 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 | 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 (this page) | 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 April
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 9,877 flights.
- 5am–8am890 flights90.3%
- 8am–11am2,072 flights86.7%
- 11am–2pm1,871 flights83.4%
- 2pm–5pm1,740 flights80.5%
- 5pm–8pm1,292 flights82.6%
- 8pm–5am2,012 flights84.7%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.3% of the time, against 80.5% for the afternoon 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 8am–11am window is the busiest, with 2,072 flights scheduled in it.
Across the week, Wednesday is the strongest day at 88.6% on time and Thursday the weakest at 75.5%. 13 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at SLC in April
The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 87.5% of the time; Southwest Airlines manages 73.8%. Sample sizes sit next to every figure, because a two-point gap across 906 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 4,616 | 84.9% | 55 min | 0.28% | B+ |
| SkyWest Airlines | 3,093 | 87.5% | 64 min | 0.23% | A+ |
| Southwest Airlines | 906 | 73.8% | 39 min | 0.44% | C+ |
| American Airlines | 384 | 82.4% | 106 min | 1.82% | B |
| Frontier Airlinesthin sample | 363 | 81.0% | 108 min | 1.38% | B |
| United Airlinesthin sample | 351 | 84.1% | 74 min | 0.28% | B+ |
| Alaska Airlinesthin sample | 134 | 78.9% | 41 min | 0.75% | B+ |
| JetBlue Airwaysthin sample | 30 | 86.7% | 69 min | 0.00% | A+ |
The spread between SkyWest and Southwest is 14 points, wide enough that it should decide the booking. On a hundred trips that is 14 more arrivals inside the on-time window.
Route by route
Busiest routes out of SLC in April
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SLC to DEN · Denver | 640 | 80.2% | 48 min | 0.00% | B+ |
| SLC to PHX · Phoenix | 522 | 83.6% | 82 min | 0.57% | B+ |
| SLC to LAX · Los Angelesthin sample | 342 | 85.1% | 46 min | 0.00% | A+ |
| SLC to LAS · Las Vegasthin sample | 338 | 76.0% | 51 min | 0.00% | B+ |
| SLC to DFW · Dallas-Fort Worththin sample | 320 | 79.4% | 98 min | 1.25% | B |
| SLC to SEA · Seattlethin sample | 315 | 89.2% | 44 min | 0.32% | A+ |
| SLC to SFO · San Franciscothin sample | 294 | 49.8% | 66 min | 1.36% | F |
| SLC to SAN · San Diegothin sample | 272 | 84.2% | 47 min | 0.00% | B+ |
| SLC to ORD · Chicagothin sample | 267 | 76.9% | 75 min | 1.50% | B |
| SLC to ATL · Atlantathin sample | 251 | 86.9% | 86 min | 0.00% | A+ |
| SLC to PDX · Portlandthin sample | 186 | 90.2% | 51 min | 1.61% | A |
| SLC to SMF · Sacramentothin sample | 173 | 87.7% | 43 min | 1.16% | A |
| SLC to JFK · New Yorkthin sample | 162 | 83.9% | 82 min | 0.00% | B+ |
| SLC to SNA · Santa Anathin sample | 161 | 81.6% | 40 min | 1.86% | B |
| SLC to SGU · St. Georgethin sample | 159 | 91.8% | 78 min | 0.00% | A+ |
| SLC to MCO · Orlandothin sample | 151 | 88.1% | 48 min | 0.00% | A+ |
| SLC to BOI · Boisethin sample | 150 | 84.6% | 42 min | 0.67% | B+ |
| SLC to AUS · Austinthin sample | 149 | 87.1% | 46 min | 1.34% | A |
| SLC to GEG · Spokanethin sample | 146 | 89.0% | 44 min | 0.00% | A+ |
| SLC to MSP · Minneapolisthin sample | 146 | 93.8% | 29 min | 0.68% | A+ |
| SLC to IAH · Houstonthin sample | 144 | 85.3% | 60 min | 0.00% | A+ |
| SLC to OAK · Oaklandthin sample | 137 | 87.6% | 61 min | 0.00% | A+ |
| SLC to SJC · San Josethin sample | 135 | 88.8% | 62 min | 0.74% | A+ |
| SLC to LGB · Long Beachthin sample | 133 | 78.2% | 45 min | 0.00% | B+ |
| SLC to DTW · Detroitthin sample | 120 | 89.2% | 38 min | 0.00% | A+ |
Delay causes
What held SLC up in April
One category carries most of the weight here. Carrier accounts for 48% of the 92,000 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.
- 48%Carrier
- 25%Late-arriving aircraft
- 23%National Airspace System
- 4%Extreme weather
- 0%Security
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 44,000 of the 92,000 delay minutes reported here. The split is drawn from 91,962 reported delay minutes.
Cancellations are rare at 0.38%, below the national 0.90% 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 6.4% 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 April
For a April trip through SLC: expect 84.4% on time and 0.38% cancelled, going by April 2026. The 5am–8am window was the strongest part of the day.
Related
Where to go next
- Salt Lake City International (SLC), the whole year
- SLC in July79.5%
- SLC in August84.3%
- SLC in September88.2%
- SLC in October85.7%
- SLC in November86.5%
- SLC in December83.8%
- SLC in January85.5%
- SLC in February85.5%
- SLC in March85.8%
- 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.