Skip to content
WanderNerd
Check a flight

Flight Reliability

AS 387 · Alaska Airlines

Minneapolis → Seattle (MSP–SEA)99% of its flights flew this route. The rest (BOS–PDX) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
6 min early
Average arrival delay
1.1%
Cancelled
12 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

AS 387 departing between 6–9 AM arrived on time 88% of the time, versus 63% between 12–3 PM.

Saturday has been the better bet.

A small edge: 88% on time on Saturdays against 82% on Sundays.

A bit ahead of the MSP–SEA route.

AS 387 arrived on time 86% of the time, versus 82% across the MSP–SEA route.

A bit ahead of the Alaska Airlines network.

AS 387 arrived on time 86% of the time, versus 80% across the Alaska Airlines network.

The breakdown

On-time by weekday
  • Mon86%(50 flights)
  • Tue86%(51 flights)
  • Wed85%(52 flights)
  • Thu84%(50 flights)
  • Fri88%(48 flights)
  • Sat88%(51 flights)
  • Sun82%(49 flights)
On-time by departure window
  • 6–9 AM88%(318 flights)
  • 12–3 PM63%(30 flights)
  • 6–9 PM—(3 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%29
July 202594%31
August 202597%31
September 2025100%30
October 202593%30
November 202587%23
December 202553%30
January 202671%31
February 202674%27
March 202664%28
April 202697%30
May 202697%31
Departures on time
90%
Diverted
0%
Flights flown
351
Months covered
12

Same route, other flights

Keep nerding

Based on 355 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.