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Route Reliability

Portland → Boise

PDX–BOI · 344 miles · Portland International Airport to Boise Airport

94
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
0 min
Average arrival delay
0.7%
Cancelled
1,748
Flights in the data

Data through May 2026.

Alaska Airlines is the only airline in this data on this route, arriving on time 89% of the time across 1,748 flights. No comparison to make.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 93% of the time, against 87% between 9 PM–12 AM.

Monday has been the better bet.

A small edge: 94% on time on Mondays against 87% on Thursdays.

Ticking up lately.

PDX–BOI flights arrived on time 93% of the time over the last three months in the data, compared with 89% 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%(260 flights)
  • Tue90%(245 flights)
  • Wed87%(247 flights)
  • Thu87%(254 flights)
  • Fri90%(256 flights)
  • Sat90%(208 flights)
  • Sun87%(264 flights)
On-time by departure window
  • 6–9 AM93%(364 flights)
  • 9 AM–12 PM93%(360 flights)
  • 12–3 PM87%(326 flights)
  • 3–6 PM87%(339 flights)
  • 9 PM–12 AM87%(345 flights)
On-time trend by month
89%
May

Jun 84% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%147
July 202588%150
August 202591%150
September 202588%145
October 202588%150
November 202585%135
December 202585%152
January 202691%138
February 202691%127
March 202695%148
April 202695%146
May 202689%146

Keep nerding

Based on 1,748 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.