Skip to content
WanderNerd
Check a flight

Route Reliability

Missoula → Portland

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

94
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
4 min early
Average arrival delay
1.4%
Cancelled
563
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 91% of the time across 563 flights. No comparison to make.

What the data says

Morning flights do better here.

MSO–PDX flights departing between 6–9 AM arrived on time 100% of the time, versus 88% between 12–3 PM.

Friday is doing you no favors.

MSO–PDX flights arrived on time 96% of the time on Saturdays. On Fridays: 82%.

Ticking up lately.

MSO–PDX flights arrived on time 89% of the time over the last three months in the data, compared with 85% 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
  • Mon94%(84 flights)
  • Tue95%(82 flights)
  • Wed86%(76 flights)
  • Thu91%(78 flights)
  • Fri82%(78 flights)
  • Sat96%(81 flights)
  • Sun93%(76 flights)
On-time by departure window
  • 3–6 AM96%(185 flights)
  • 6–9 AM100%(18 flights)
  • 12–3 PM88%(352 flights)
On-time trend by month
93%
May

Jun 93% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%60
July 202592%61
August 202595%62
September 202598%48
October 202593%56
November 202597%57
December 202575%56
January 202697%36
February 202682%28
March 202684%31
April 202690%30
May 202693%30

Keep nerding

Based on 563 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.