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Route Reliability

Seattle → PSC

SEA–PSC · 172 miles · Seattle–Tacoma International Airport to PSC Airport

87
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
2 min
Average arrival delay
1.1%
Cancelled
2,720
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 Lines87%1,106 flights
  2. 2.Alaska Airlines83%1,614 flights

What the data says

The 12–3 PM departure wins.

SEA–PSC flights departing between 12–3 PM arrived on time 87% of the time, versus 78% between 6–9 AM.

Thursday is the weak spot.

SEA–PSC flights arrived on time 90% of the time on Tuesdays. On Thursdays: 80%.

Delta Air Lines has a slight edge here.

Delta Air Lines arrived on time 87% of the time on this route; Alaska Airlines managed 83%.

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
  • Mon84%(403 flights)
  • Tue90%(378 flights)
  • Wed86%(366 flights)
  • Thu80%(389 flights)
  • Fri83%(391 flights)
  • Sat87%(357 flights)
  • Sun81%(401 flights)
On-time by departure window
  • 6–9 AM78%(36 flights)
  • 9 AM–12 PM85%(724 flights)
  • 12–3 PM87%(254 flights)
  • 3–6 PM86%(524 flights)
  • 6–9 PM82%(450 flights)
  • 9 PM–12 AM83%(697 flights)
On-time trend by month
86%
May

Jun 77% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%246
July 202581%240
August 202583%254
September 202589%226
October 202585%228
November 202589%206
December 202582%232
January 202683%201
February 202686%180
March 202686%195
April 202687%208
May 202686%269

Keep nerding

Based on 2,720 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.