BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOI→PDX

Boise, ID (BOI) to Portland, OR (PDX) flight delay odds

91.4% of 1,115 official scheduled BOI-to-PDX flights arrived on time; 4.4% arrived at least 30 minutes late and 0.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
91.4%arrived on time
4.4%30+ min late
0.5%cancelled
1,115scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late2.3%all scheduled flights
120+ minutes late0.8%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-3.6 mincompleted flights

Which departure time was most reliable for BOI to PDX?

Among qualifying BOI-to-PDX departure window results, Evening had the highest on-time rate: 100.0% of 41 flights. Afternoon was lowest at 87.4% across 573 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning28595.4%2.8%0.4%
Late morning21694.9%3.2%0.0%
Afternoon57387.4%5.9%0.9%
Evening41100.0%0.0%0.0%

Which weekday was most reliable for BOI to PDX?

Among qualifying BOI-to-PDX weekday results, Tuesday had the highest on-time rate: 95.5% of 155 flights. Friday was lowest at 86.3% across 168 flights.

DayFlightsOn time30+ minCancelled
Monday16895.2%4.2%0.0%
Tuesday15595.5%1.9%0.6%
Wednesday15491.6%3.2%0.0%
Thursday16989.9%4.7%0.6%
Friday16886.3%6.5%0.6%
Saturday13590.4%3.7%2.2%
Sunday16691.0%6.0%0.0%

Which airline was most reliable for BOI to PDX?

Among qualifying BOI-to-PDX airline results, Alaska Airlines had the highest on-time rate: 91.5% of 658 flights. SkyWest Airlines was lowest at 91.2% across 457 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines65891.5%4.6%0.2%
SkyWest Airlines45791.2%4.2%1.1%

Which month was most reliable for BOI to PDX?

Among qualifying BOI-to-PDX month results, October 2025 had the highest on-time rate: 95.8% of 119 flights. December 2025 was lowest at 84.8% across 105 flights.

MonthFlightsOn time30+ minCancelled
July 20258993.3%3.4%0.0%
August 202510290.2%3.9%0.0%
September 202512095.0%4.2%0.0%
October 202511995.8%2.5%0.8%
November 202510887.0%4.6%3.7%
December 202510584.8%6.7%0.0%
January 202610393.2%3.9%0.0%
February 20269594.7%4.2%0.0%
March 20268489.3%8.3%0.0%
April 20265794.7%1.8%0.0%
May 20267685.5%3.9%1.3%
June 20265793.0%5.3%0.0%

What drove BOI to PDX delay minutes?

Late aircraft was the largest recorded BOI-to-PDX delay category, accounting for 57.4% of 5,308 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.7%
Late aircraft57.4%
National airspace9.0%
Weather2.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.