SEA to SUN flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Friedman Memorial Airport · 475 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or SUN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Sun Valley/Hailey/Ketchum (SUN) arrived on time 87% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0% were cancelled, and 8% arrived an hour or more late.
- SkyWest Airlines is the only airline reporting nonstop flights on this route.
- Saturday was the most reliable day to fly (100% on time) and Sunday the least (90%).
- The largest source of delay minutes was extreme weather (84%).
Which airline is most on time from SEA 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. | 87% | 0.0% | 17 min | 7.9% | 38 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
Not enough departures across different hours to compare.
Best day of the week
On-time arrival rate by day of departure.
- Monday67%0.0% cancelled
- Tuesday100%0.0% cancelled
- Wednesday0%0.0% cancelled
- Thursday100%0.0% cancelled
- Friday89%0.0% cancelled
- Saturday100%0.0% cancelled
- Sunday90%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Extreme weather84%
- Airline (crew, maintenance, cleaning, fueling)9%
- Air traffic control & airport congestion7%
- Late-arriving aircraft0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
SEA to SUN: common questions
- How often are SEA to SUN flights on time?
- 87% 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 Seattle to Sun Valley/Hailey/Ketchum cancelled?
- 0.0% of scheduled flights were cancelled (0 of 38).
- 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 121 min behind schedule on average, and 7.9% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 27 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SUN to SEA — 89% on time
More flights from Seattle
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: SEA → SUN, nonstop flights by US airlines that report to the DOT. How we calculate this.