Skip to content
WanderNerd
Check a flight

Route Reliability

Seattle → San Jose

SEA–SJC · 696 miles · Seattle–Tacoma International Airport to San José Mineta International Airport

87
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0.9%
Cancelled
4,414
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines89%1,518 flights
  2. 2.Alaska Airlines81%1,944 flights
  3. 3.Southwest Airlines75%947 flights

Not enough history to rank: American Airlines (4 flights), United Airlines (1 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning flights do better here.

SEA–SJC flights departing between 6–9 AM arrived on time 93% of the time, versus 67% between 9 PM–12 AM.

Friday is doing you no favors.

SEA–SJC flights arrived on time 88% of the time on Wednesdays. On Fridays: 78%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 89% of the time on this route; Southwest Airlines managed 75%.

Ticking up lately.

SEA–SJC flights arrived on time 86% of the time over the last three months in the data, compared with 83% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon81%(671 flights)
  • Tue87%(621 flights)
  • Wed88%(619 flights)
  • Thu82%(665 flights)
  • Fri78%(649 flights)
  • Sat83%(510 flights)
  • Sun79%(638 flights)
On-time by departure window
  • 6–9 AM93%(889 flights)
  • 9 AM–12 PM81%(902 flights)
  • 12–3 PM82%(699 flights)
  • 3–6 PM81%(989 flights)
  • 6–9 PM76%(840 flights)
  • 9 PM–12 AM67%(54 flights)
On-time trend by month
88%
May

Jun 77% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%407
July 202574%415
August 202579%394
September 202584%371
October 202584%392
November 202586%375
December 202579%350
January 202684%327
February 202685%342
March 202681%323
April 202690%304
May 202688%373

Same trip, other airports

Keep nerding

Based on 4,414 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.