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Route Reliability

Seattle → Kalispell

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

87
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
1.4%
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 85% of the time across 1,106 flights. No comparison to make.

What the data says

Morning flights do better here.

SEA–FCA flights departing between 6–9 AM arrived on time 90% of the time, versus 80% between 12–3 PM.

Friday is doing you no favors.

SEA–FCA flights arrived on time 88% of the time on Sundays. On Fridays: 79%.

Ticking up lately.

SEA–FCA flights arrived on time 90% of the time over the last three months in the data, compared with 87% 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%(159 flights)
  • Tue87%(158 flights)
  • Wed87%(153 flights)
  • Thu83%(151 flights)
  • Fri79%(158 flights)
  • Sat87%(150 flights)
  • Sun88%(160 flights)
On-time by departure window
  • 6–9 AM90%(19 flights)
  • 9 AM–12 PM87%(331 flights)
  • 12–3 PM80%(144 flights)
  • 3–6 PM84%(243 flights)
  • 9 PM–12 AM86%(352 flights)
On-time trend by month
91%
May

Jun 69% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%90
July 202588%91
August 202575%124
September 202589%120
October 202586%88
November 202588%66
December 202576%75
January 202694%86
February 202689%84
March 202686%88
April 202693%86
May 202691%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.