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Route Reliability

Seattle → GTF

SEA–GTF · 512 miles · Seattle–Tacoma International Airport to GTF Airport

88
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
3 min
Average arrival delay
0.5%
Cancelled
364
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 83% of the time across 364 flights. No comparison to make.

What the data says

Departure time hasn't mattered much.

On-time rates stay between 83% and 83% across the day.

Mondays have been rough.

SEA–GTF flights arrived on time 92% of the time on Wednesdays and just 75% on Mondays. That gap is worth planning around.

Ticking up lately.

SEA–GTF flights arrived on time 85% of the time over the last three months in the data, compared with 80% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon75%(52 flights)
  • Tue87%(52 flights)
  • Wed92%(52 flights)
  • Thu78%(51 flights)
  • Fri82%(50 flights)
  • Sat86%(51 flights)
  • Sun81%(53 flights)
On-time by departure window
  • 12–3 PM83%(240 flights)
  • 3–6 PM83%(121 flights)
On-time trend by month
74%
May

Jun 72% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%29
July 202581%31
August 202581%31
September 202583%30
October 202594%31
November 202593%29
December 202574%31
January 202690%31
February 202675%28
March 202679%29
April 2026100%30
May 202674%31

Keep nerding

Based on 364 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.