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Route Reliability

Portland → Missoula

PDX–MSO · 418 miles · Portland International Airport to Missoula Montana Airport

93
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
0 min
Average arrival delay
0.4%
Cancelled
561
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 88% of the time across 561 flights. No comparison to make.

What the data says

Morning flights do better here.

PDX–MSO flights departing between 9 AM–12 PM arrived on time 91% of the time, versus 83% between 9 PM–12 AM.

Friday is doing you no favors.

PDX–MSO flights arrived on time 93% of the time on Saturdays. On Fridays: 86%.

Ticking up lately.

PDX–MSO flights arrived on time 92% 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
  • Mon87%(83 flights)
  • Tue87%(78 flights)
  • Wed86%(79 flights)
  • Thu87%(79 flights)
  • Fri86%(79 flights)
  • Sat93%(75 flights)
  • Sun88%(84 flights)
On-time by departure window
  • 9 AM–12 PM91%(357 flights)
  • 9 PM–12 AM83%(200 flights)
On-time trend by month
94%
May

Jun 83% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%60
July 202589%61
August 202587%62
September 202590%48
October 202588%56
November 202593%59
December 202568%56
January 202697%35
February 202696%28
March 202684%31
April 2026100%30
May 202694%31

Keep nerding

Based on 561 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.