SEA to SJC flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Mineta San Jose International Airport · 696 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or SJC 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 San Jose (SJC) arrived on time 81% 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 (87% on time); Southwest Airlines was the least (72%).
- Departures scheduled around 8am did best (92% on time); around 8pm did worst (67%).
- Wednesday was the most reliable day to fly (86% on time) and Friday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (41%).
Which airline is most on time from SEA to SJC?
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% | 4 |
| United Airlines | 100% | 0.0% | 0 min | 0.0% | 1 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 87% | 0.2% | 9 min | 3.8% | 1,593 |
| Alaska Airlines | 81% | 1.1% | 10 min | 4.0% | 1,881 |
| Southwest Airlines | 72% | 0.2% | 13 min | 5.6% | 905 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am95%73 flights
- 7am91%378 flights
- 8am92%451 flights
- 9am88%194 flights
- 10am86%200 flights
- 11am75%469 flights
- 12pm77%261 flights
- 1pm81%178 flights
- 2pm85%279 flights
- 3pm75%336 flights
- 4pm86%274 flights
- 5pm80%424 flights
- 6pm75%134 flights
- 7pm80%343 flights
- 8pm67%312 flights
- 9pm65%78 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%0.4% cancelled
- Tuesday86%0.3% cancelled
- Wednesday86%0.6% cancelled
- Thursday79%0.6% cancelled
- Friday77%1.0% cancelled
- Saturday83%0.6% cancelled
- Sunday78%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)41%
- Late-arriving aircraft36%
- Air traffic control & airport congestion12%
- Extreme weather10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)72%
- Extreme weather24%
- Air traffic control & airport congestion4%
- Security0%
SEA to SJC: common questions
- How often are SEA to SJC flights on time?
- 81% 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 San Jose cancelled?
- 0.6% of scheduled flights were cancelled (25 of 4,384).
- 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 48 min behind schedule on average, and 4.3% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SJC to SEA — 83% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → SJC, nonstop flights by US airlines that report to the DOT. How we calculate this.