SJC to SEA flight delays & on-time performance
Nonstop flights from Mineta San Jose International Airport to Seattle–Tacoma International Airport · 696 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SJC or SEA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Jose (SJC) to Seattle (SEA) arrived on time 83% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.6% were cancelled, and 4% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (89% on time); Southwest Airlines was the least (77%).
- Departures scheduled around 6am did best (96% on time); around 7pm did worst (65%).
- Wednesday was the most reliable day to fly (88% on time) and Thursday the least (79%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from SJC to SEA?
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 |
|---|---|---|---|---|---|
| American Airlines | 100% | 0.0% | 5 min | 0.0% | 2 |
| United Airlines | 100% | 0.0% | 0 min | 0.0% | 1 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 89% | 0.2% | 8 min | 3.1% | 1,594 |
| Alaska Airlines | 81% | 1.3% | 10 min | 4.5% | 1,878 |
| Southwest Airlines | 77% | 0.0% | 11 min | 4.5% | 906 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am96%338 flights
- 7am95%445 flights
- 8am68%268 flights
- 9am81%152 flights
- 10am88%240 flights
- 11am90%487 flights
- 12pm81%132 flights
- 1pm81%98 flights
- 2pm81%537 flights
- 3pm85%245 flights
- 4pm89%185 flights
- 5pm83%270 flights
- 6pm80%454 flights
- 7pm65%248 flights
- 8pm78%174 flights
- 9pm69%108 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday83%0.4% cancelled
- Tuesday87%0.5% cancelled
- Wednesday88%0.7% cancelled
- Thursday79%0.6% cancelled
- Friday81%1.5% cancelled
- Saturday87%0.2% cancelled
- Sunday80%0.3% 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)37%
- Late-arriving aircraft31%
- Air traffic control & airport congestion25%
- Extreme weather7%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)74%
- Extreme weather22%
- Air traffic control & airport congestion4%
- Security0%
SJC to SEA: common questions
- How often are SJC to SEA 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 Jose to Seattle cancelled?
- 0.6% of scheduled flights were cancelled (27 of 4,381).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 52 min behind schedule on average, and 4.0% of flights were an hour or more late.
- How long is taxi time at SJC?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SEA to SJC — 81% on time
More flights from San Jose
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SJC → SEA, nonstop flights by US airlines that report to the DOT. How we calculate this.