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Route Reliability

Spokane → Seattle

GEG–SEA · 224 miles · Spokane International Airport to Seattle–Tacoma International Airport

89
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
1 min
Average arrival delay
1.1%
Cancelled
6,398
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 Lines91%2,962 flights
  2. 2.Alaska Airlines81%3,436 flights

What the data says

Morning-you made the right choice.

GEG–SEA flights departing between 3–6 AM arrived on time 94% of the time, versus 78% between 6–9 PM.

Friday is doing you no favors.

GEG–SEA flights arrived on time 90% of the time on Wednesdays. On Fridays: 81%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 91% of the time on this route; Alaska Airlines managed 81%.

Ticking up lately.

GEG–SEA flights arrived on time 90% of the time over the last three months in the data, compared with 85% 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
  • Mon86%(928 flights)
  • Tue88%(927 flights)
  • Wed90%(905 flights)
  • Thu81%(911 flights)
  • Fri81%(892 flights)
  • Sat87%(857 flights)
  • Sun87%(902 flights)
On-time by departure window
  • 3–6 AM94%(574 flights)
  • 6–9 AM92%(1480 flights)
  • 9 AM–12 PM84%(1354 flights)
  • 12–3 PM82%(844 flights)
  • 3–6 PM84%(1159 flights)
  • 6–9 PM78%(901 flights)
  • 9 PM–12 AM90%(10 flights)
On-time trend by month
91%
May

Jun 79% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%562
July 202581%600
August 202582%585
September 202587%556
October 202586%560
November 202589%495
December 202581%498
January 202684%490
February 202691%469
March 202688%496
April 202690%476
May 202691%535

Keep nerding

Based on 6,398 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.