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Route Reliability

San Jose → Seattle

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

88
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min early
Average arrival delay
0.9%
Cancelled
4,412
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 Airlines83%1,943 flights
  3. 3.Southwest Airlines77%948 flights

Not enough history to rank: American Airlines (2 flights), United Airlines (1 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning flights do better here.

SJC–SEA flights departing between 6–9 AM arrived on time 90% of the time, versus 67% between 9 PM–12 AM.

Friday is doing you no favors.

SJC–SEA flights arrived on time 90% of the time on Tuesdays. On Fridays: 79%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 89% of the time on this route; Southwest Airlines managed 77%.

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
  • Mon83%(678 flights)
  • Tue90%(624 flights)
  • Wed89%(615 flights)
  • Thu79%(664 flights)
  • Fri79%(644 flights)
  • Sat88%(510 flights)
  • Sun82%(636 flights)
On-time by departure window
  • 6–9 AM90%(990 flights)
  • 9 AM–12 PM88%(928 flights)
  • 12–3 PM83%(764 flights)
  • 3–6 PM84%(742 flights)
  • 6–9 PM74%(811 flights)
  • 9 PM–12 AM67%(136 flights)
On-time trend by month
83%
May

Jun 78% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%407
July 202579%416
August 202581%394
September 202584%371
October 202585%390
November 202585%375
December 202581%349
January 202688%330
February 202693%339
March 202687%321
April 202687%305
May 202683%374

Same trip, other airports

Keep nerding

Based on 4,412 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.