Airport month record
SLCJUN
Salt Lake City International in June 2026
- Departures
- 10,084
- Month
- June 2026
- National, same month
- 74.3%
- Carriers
- 8
Historical statistics for June 2026, not live status or a forecast for this year’s June. For today’s conditions at SLC, see live FAA status.
SLC in June lands a B+, 9 points better than the national rate of 74.3%. About one flight in six 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 10,084 flights, of which SkyWest Airlines flew 3,189 at 91.7% on time.
SkyWest Airlines is the most reliable of the five carriers covered here at 91.7% on time across 3,189 flights.
Key figures
On time
83.3%
Arrivals under 15 minutes late, of 10,007 completed departures
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
0.48%
Nationally in June: 1.65%
Whole year
84.8%
SLC across all twelve months
These figures cover 10,084 departures from Salt Lake City International in June 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
June next to SLC's other months
Against SLC's own year, June ran 2 points worse than the twelve-month rate of 84.8%, which makes it number eleven of twelve months, best first.
| 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 | 9,877 | 84.4% | 60 min | 0.38% | B+ |
| May 2026 | 10,146 | 85.3% | 57 min | 0.42% | A+ |
| June 2026 (this page) | 10,084 | 83.3% | 64 min | 0.48% | B+ |
Departure window
The best time of day to leave SLC in June
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against 22 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am896 flights91.7%
- 8am–11am2,061 flights87.9%
- 11am–2pm1,920 flights84.5%
- 2pm–5pm1,633 flights80.3%
- 5pm–8pm1,422 flights76.6%
- 8pm–5am2,152 flights81.1%
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 91.7% of the time, against 76.6% for the evening window. That is 15 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 2,152 flights scheduled in it.
Across the week, Tuesday is the strongest day at 86.2% on time and Thursday the weakest at 80.0%. 6 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at SLC in June
The choice of carrier is not cosmetic here. SkyWest Airlines arrives on time 91.7% of the time; Southwest Airlines manages 69.8%. Sample sizes sit next to every figure, because a two-point gap across 926 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 4,670 | 82.0% | 56 min | 0.43% | B+ |
| SkyWest Airlines | 3,189 | 91.7% | 76 min | 0.03% | A+ |
| Southwest Airlines | 926 | 69.8% | 51 min | 0.00% | C+ |
| United Airlines | 405 | 75.6% | 89 min | 1.48% | B |
| American Airlines | 404 | 75.5% | 113 min | 3.96% | B− |
| Frontier Airlinesthin sample | 276 | 79.8% | 85 min | 1.45% | B |
| Alaska Airlinesthin sample | 155 | 76.8% | 53 min | 0.00% | B+ |
| JetBlue Airwaysthin sample | 50 | 75.5% | 65 min | 2.00% | B |
American Airlines cancels 4.0% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Busiest routes out of SLC in June
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SLC to DEN · Denver | 658 | 78.6% | 70 min | 0.15% | B+ |
| SLC to PHX · Phoenix | 435 | 78.8% | 71 min | 0.46% | B+ |
| SLC to SEA · Seattlethin sample | 358 | 76.8% | 70 min | 0.00% | B+ |
| SLC to LAX · Los Angelesthin sample | 327 | 86.5% | 43 min | 0.00% | A+ |
| SLC to DFW · Dallas-Fort Worththin sample | 326 | 76.3% | 79 min | 3.68% | B− |
| SLC to LAS · Las Vegasthin sample | 293 | 71.7% | 56 min | 0.00% | C+ |
| SLC to SFO · San Franciscothin sample | 291 | 42.4% | 70 min | 1.03% | F |
| SLC to ORD · Chicagothin sample | 291 | 75.2% | 98 min | 2.41% | B |
| SLC to SAN · San Diegothin sample | 254 | 76.5% | 53 min | 1.18% | B |
| SLC to ATL · Atlantathin sample | 242 | 89.5% | 48 min | 0.41% | A+ |
| SLC to PDX · Portlandthin sample | 215 | 86.4% | 48 min | 0.93% | A+ |
| SLC to SMF · Sacramentothin sample | 199 | 82.3% | 57 min | 0.50% | B+ |
| SLC to AUS · Austinthin sample | 163 | 75.5% | 48 min | 0.00% | B+ |
| SLC to SJC · San Josethin sample | 163 | 83.4% | 67 min | 0.00% | B+ |
| SLC to JFK · New Yorkthin sample | 150 | 80.3% | 46 min | 0.67% | B+ |
| SLC to DTW · Detroitthin sample | 148 | 88.5% | 53 min | 0.00% | A+ |
| SLC to BOI · Boisethin sample | 147 | 91.0% | 104 min | 2.04% | A |
| SLC to SGU · St. Georgethin sample | 147 | 89.0% | 80 min | 0.00% | A+ |
| SLC to GEG · Spokanethin sample | 146 | 82.8% | 74 min | 0.68% | B+ |
| SLC to SNA · Santa Anathin sample | 144 | 88.9% | 41 min | 0.00% | A+ |
| SLC to MSP · Minneapolisthin sample | 143 | 86.7% | 45 min | 0.00% | A+ |
| SLC to IAH · Houstonthin sample | 142 | 80.0% | 57 min | 1.41% | B |
| SLC to LGB · Long Beachthin sample | 133 | 91.6% | 44 min | 1.50% | A |
| SLC to OAK · Oaklandthin sample | 121 | 92.6% | 45 min | 0.00% | A+ |
| SLC to IDA · Idaho Fallsthin sample | 120 | 95.8% | 38 min | 0.00% | A+ |
Delay causes
What held SLC up in June
One category carries most of the weight here. Carrier accounts for 44% of the 107,000 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.
- 44%Carrier
- 32%Late-arriving aircraft
- 21%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 44%, 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 48,000 of the 107,000 delay minutes reported here. The split is drawn from 107,345 reported delay minutes.
Cancellations are rare at 0.48%, below the national 1.65% 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.
5.2% of arrivals land an hour or more late, close to the national 9.7%. 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.
What to do with this
Flying from SLC in June
For a June trip through SLC: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 91.7% on time, and with 5.2% of arrivals an hour or more late, a connection here deserves more slack than the same trip in September would.
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 April84.4%
- SLC in May85.3%
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.