Skip to content
WanderNerd
Check a flight

Flight Reliability

AS 641 · Alaska Airlines

Tucson → Seattle (TUS–SEA)

88
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0.6%
Cancelled
5 min early
Median arrival delay

Based on 335 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AS 641 departing between 12–3 PM arrived on time 90% of the time, versus 75% between 3–6 PM.

Friday is doing you no favors.

AS 641 arrived on time 92% of the time on Saturdays and just 73% on Fridays. That gap is worth planning around.

A bit behind the TUS–SEA route.

AS 641 arrived on time 82% of the time, versus 88% across the TUS–SEA route.

Trending in the right direction.

AS 641 arrived on time 86% of the time over the last three months in the data, compared with 75% in the three months before that.

The breakdown

On-time by weekday
  • Mon85%(52 flights)
  • Tue83%(46 flights)
  • Wed87%(45 flights)
  • Thu84%(50 flights)
  • Fri73%(51 flights)
  • Sat92%(36 flights)
  • Sun76%(53 flights)
On-time by departure window
  • 12–3 PM90%(164 flights)
  • 3–6 PM75%(169 flights)
On-time trend by month
87%
May

Jun 73% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202597%31
August 202587%31
September 2025100%30
October 202571%21
November 202561%28
December 202552%23
January 202682%27
February 202692%24
March 202682%28
April 202690%29
May 202687%31
Departures on time
75%
Diverted
0%
Flights flown
333
Months covered
12

Same route, other flights

Keep nerding

Based on 335 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.