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Route Reliability

Kalispell → Seattle

FCA–SEA · 379 miles · Glacier Park International Airport to Seattle–Tacoma International Airport

88
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
2 min early
Average arrival delay
1.5%
Cancelled
1,106
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 87% of the time across 1,106 flights. No comparison to make.

What the data says

The 6–9 AM departure wins.

FCA–SEA flights departing between 6–9 AM arrived on time 95% of the time, versus 74% between 9 AM–12 PM.

Friday is doing you no favors.

FCA–SEA flights arrived on time 91% of the time on Tuesdays. On Fridays: 83%.

Slipping a little lately.

FCA–SEA flights arrived on time 82% of the time over the last three months in the data, compared with 89% 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
  • Mon89%(155 flights)
  • Tue91%(158 flights)
  • Wed87%(155 flights)
  • Thu84%(152 flights)
  • Fri83%(158 flights)
  • Sat90%(149 flights)
  • Sun83%(161 flights)
On-time by departure window
  • 6–9 AM95%(357 flights)
  • 9 AM–12 PM74%(19 flights)
  • 12–3 PM87%(409 flights)
  • 3–6 PM80%(64 flights)
  • 6–9 PM77%(239 flights)
On-time trend by month
79%
May

Jun 85% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%89
July 202591%90
August 202581%124
September 202589%120
October 202593%88
November 202591%66
December 202589%75
January 202690%86
February 202688%84
March 202682%90
April 202685%85
May 202679%91

Keep nerding

Based on 1,106 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.