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Route Reliability

Seattle → Pittsburgh

SEA–PIT · 2,125 miles · Seattle–Tacoma International Airport to Pittsburgh International Airport

81
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
5 min
Average arrival delay
0.8%
Cancelled
471
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 77% of the time across 471 flights. No comparison to make.

What the data says

9 PM–12 AM has a slight edge.

Departures between 9 PM–12 AM arrived on time 81% of the time, against 76% between 9 AM–12 PM.

Friday is doing you no favors.

SEA–PIT flights arrived on time 86% of the time on Tuesdays and just 67% on Fridays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon75%(72 flights)
  • Tue86%(63 flights)
  • Wed82%(65 flights)
  • Thu79%(72 flights)
  • Fri67%(70 flights)
  • Sat80%(50 flights)
  • Sun75%(73 flights)
On-time by departure window
  • 9 AM–12 PM76%(336 flights)
  • 9 PM–12 AM81%(129 flights)
On-time trend by month
84%
May

Jun 70% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%59
July 202568%60
August 202566%58
September 202585%52
October 202594%32
November 202585%26
December 202572%29
January 202682%22
February 202685%20
March 202677%26
April 202683%30
May 202684%51

Keep nerding

Based on 471 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.