SAN to SLC flight delays & on-time performance
Nonstop flights from San Diego International Airport to Salt Lake City International Airport · 626 miles · Aug 2025 – Jul 2026
- SAN: Airport closed. Closed, expected to reopen Oct 11 at 13:00 UTC.
On-time arrivals
84%
arrived < 15 min late
Cancelled
0.7%
21 flights
Avg arrival delay
11 min
65 min when late
Airlines
4
3,011 flights tracked
Key facts
- Flights from San Diego (SAN) to Salt Lake City (SLC) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.7% were cancelled, and 5% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (89% on time); Southwest Airlines was the least (76%).
- Departures scheduled around 6am did best (96% on time); around 3pm did worst (67%).
- Tuesday was the most reliable day to fly (89% on time) and Friday the least (78%).
- The largest source of delay minutes was late-arriving aircraft (57%).
Which airline is most on time from SAN to SLC?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 89% | 0.8% | 9 min | 4.0% | 1,733 |
| Frontier Airlines | 83% | 0.8% | 17 min | 6.7% | 121 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 79% | 0.7% | 14 min | 8.2% | 749 |
| Southwest Airlines | 76% | 0.2% | 12 min | 5.7% | 408 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am96%387 flights
- 8am88%165 flights
- 9am92%477 flights
- 10am90%62 flights
- 11am78%63 flights
- 12pm82%50 flights
- 1pm84%429 flights
- 3pm67%126 flights
- 4pm70%86 flights
- 5pm78%626 flights
- 6pm68%75 flights
- 7pm86%351 flights
- 8pm73%84 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday88%0.4% cancelled
- Tuesday89%0.5% cancelled
- Wednesday88%1.0% cancelled
- Thursday78%0.9% cancelled
- Friday78%0.2% cancelled
- Saturday88%1.3% cancelled
- Sunday82%0.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft57%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion11%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)57%
- Extreme weather24%
- Air traffic control & airport congestion19%
- Security0%
SAN to SLC: common questions
- How often are SAN to SLC flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Diego to Salt Lake City cancelled?
- 0.7% of scheduled flights were cancelled (21 of 3,011).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 5.4% of flights were an hour or more late.
- How long is taxi time at SAN?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SLC to SAN — 82% on time
More flights from San Diego
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAN → SLC, nonstop flights by US airlines that report to the DOT. How we calculate this.