SFO to SLC flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Salt Lake City International Airport · 599 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or SLC right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Francisco (SFO) to Salt Lake City (SLC) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1% were cancelled, and 8% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (77% on time); Frontier Airlines was the least (70%).
- Departures scheduled around 5am did best (96% on time); around 4pm did worst (63%).
- Saturday was the most reliable day to fly (83% on time) and Monday the least (70%).
- The largest source of delay minutes was late-arriving aircraft (51%).
Which airline is most on time from SFO 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 | 77% | 1.0% | 18 min | 7.9% | 1,709 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 77% | 1.2% | 17 min | 7.7% | 1,044 |
| United Airlines | 76% | 0.2% | 14 min | 7.6% | 505 |
| Frontier Airlines | 70% | 2.1% | 25 min | 12.0% | 195 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am96%258 flights
- 6am95%107 flights
- 8am92%280 flights
- 9am79%449 flights
- 10am82%45 flights
- 12pm76%244 flights
- 1pm64%472 flights
- 3pm81%42 flights
- 4pm63%421 flights
- 5pm73%351 flights
- 6pm81%314 flights
- 7pm79%278 flights
- 8pm64%133 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday70%1.7% cancelled
- Tuesday81%0.4% cancelled
- Wednesday80%0.6% cancelled
- Thursday74%0.6% cancelled
- Friday75%1.1% cancelled
- Saturday83%1.2% cancelled
- Sunday77%1.3% 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 aircraft51%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion16%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)57%
- Air traffic control & airport congestion40%
- Extreme weather3%
- Security0%
SFO to SLC: common questions
- How often are SFO to SLC flights on time?
- 77% 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 Francisco to Salt Lake City cancelled?
- 1.0% of scheduled flights were cancelled (35 of 3,453).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 70 min behind schedule on average, and 8.0% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SLC to SFO — 66% on time
More flights from San Francisco
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → SLC, nonstop flights by US airlines that report to the DOT. How we calculate this.