SLC to SFO flight delays & on-time performance
Nonstop flights from Salt Lake City International Airport to San Francisco International Airport · 599 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SLC or SFO right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Salt Lake City (SLC) to San Francisco (SFO) arrived on time 66% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1% were cancelled, and 11% arrived an hour or more late.
- United Airlines was the most punctual airline here (71% on time); Delta Air Lines was the least (64%).
- Departures scheduled around 6am did best (93% on time); around 9am did worst (27%).
- Saturday was the most reliable day to fly (75% on time) and Monday the least (59%).
- The largest source of delay minutes was air traffic control & airport congestion (54%).
Which airline is most on time from SLC to SFO?
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 |
|---|---|---|---|---|---|
| United Airlines | 71% | 0.2% | 21 min | 12.5% | 507 |
| Frontier Airlines | 67% | 2.6% | 34 min | 15.3% | 195 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 66% | 1.1% | 27 min | 13.1% | 1,045 |
| Delta Air Lines | 64% | 1.0% | 20 min | 9.7% | 1,707 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am93%190 flights
- 7am68%377 flights
- 8am73%213 flights
- 9am27%147 flights
- 11am62%393 flights
- 12pm78%160 flights
- 1pm86%161 flights
- 3pm65%357 flights
- 4pm72%429 flights
- 5pm73%147 flights
- 8pm46%479 flights
- 9pm60%85 flights
- 10pm66%259 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday59%1.5% cancelled
- Tuesday74%0.9% cancelled
- Wednesday66%0.8% cancelled
- Thursday62%0.8% cancelled
- Friday66%1.1% cancelled
- Saturday75%0.7% cancelled
- Sunday62%1.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion54%
- Airline (crew, maintenance, cleaning, fueling)25%
- Late-arriving aircraft20%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)60%
- Air traffic control & airport congestion37%
- Extreme weather3%
- Security0%
SLC to SFO: common questions
- How often are SLC to SFO flights on time?
- 66% 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 Salt Lake City to San Francisco cancelled?
- 1.0% of scheduled flights were cancelled (35 of 3,454).
- How long are typical delays?
- Across all flights the average arrival delay was 23 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 11.5% of flights were an hour or more late.
- How long is taxi time at SLC?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SFO to SLC — 77% on time
More flights from Salt Lake City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SLC → SFO, nonstop flights by US airlines that report to the DOT. How we calculate this.