SFO to SUN flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Friedman Memorial Airport · 587 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or SUN 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 Sun Valley/Hailey/Ketchum (SUN) arrived on time 83% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.3% were cancelled, and 5% arrived an hour or more late.
- SkyWest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9am did best (85% on time); around 6pm did worst (84%).
- Tuesday was the most reliable day to fly (90% on time) and Monday the least (79%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (58%).
Which airline is most on time from SFO to SUN?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 83% | 0.3% | 14 min | 5.5% | 293 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am69%13 flights
- 9am85%101 flights
- 6pm84%153 flights
- 7pm86%14 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%0.0% cancelled
- Tuesday90%0.0% cancelled
- Wednesday83%0.0% cancelled
- Thursday81%0.0% cancelled
- Friday81%0.0% cancelled
- Saturday87%0.0% cancelled
- Sunday81%2.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)58%
- Late-arriving aircraft23%
- Air traffic control & airport congestion17%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
SFO to SUN: common questions
- How often are SFO to SUN flights on time?
- 83% 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 Sun Valley/Hailey/Ketchum cancelled?
- 0.3% of scheduled flights were cancelled (1 of 293).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 77 min behind schedule on average, and 5.5% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SUN to SFO — 63% on time
More flights from San Francisco
More flights to Sun Valley/Hailey/Ketchum
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → SUN, nonstop flights by US airlines that report to the DOT. How we calculate this.