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

Boston, MA (BOS) to Portland, OR (PDX) flight delay odds

74.9% of 649 official scheduled BOS-to-PDX flights arrived on time; 14.5% arrived at least 30 minutes late and 1.1% 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 SIGNALGenerally reliable
74.9%arrived on time
14.5%30+ min late
1.1%cancelled
649scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.5%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+3.2 mincompleted flights

Which departure time was most reliable for BOS to PDX?

Among qualifying BOS-to-PDX departure window results, Early morning had the highest on-time rate: 92.4% of 210 flights. Evening was lowest at 64.0% across 297 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning21092.4%2.4%0.0%
Late morning4185.4%7.3%0.0%
Afternoon10166.3%19.8%3.0%
Evening29764.0%22.2%1.3%

Which weekday was most reliable for BOS to PDX?

Among qualifying BOS-to-PDX weekday results, Saturday had the highest on-time rate: 79.8% of 84 flights. Thursday was lowest at 68.5% across 92 flights.

DayFlightsOn time30+ minCancelled
Monday10275.5%5.9%3.9%
Tuesday9875.5%14.3%0.0%
Wednesday8078.8%16.2%1.2%
Thursday9268.5%22.8%0.0%
Friday10269.6%18.6%1.0%
Saturday8479.8%9.5%0.0%
Sunday9178.0%14.3%1.1%

Which airline was most reliable for BOS to PDX?

Among qualifying BOS-to-PDX airline results, Alaska Airlines had the highest on-time rate: 77.1% of 533 flights. JetBlue Airways was lowest at 64.7% across 116 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines53377.1%12.0%1.1%
JetBlue Airways11664.7%25.9%0.9%

Which month was most reliable for BOS to PDX?

Among qualifying BOS-to-PDX month results, August 2025 had the highest on-time rate: 89.7% of 87 flights. March 2026 was lowest at 47.2% across 36 flights.

MonthFlightsOn time30+ minCancelled
July 20259259.8%25.0%1.1%
August 20258789.7%8.0%0.0%
September 20255086.0%8.0%0.0%
October 20254872.9%18.8%4.2%
November 20253873.7%18.4%0.0%
December 20253953.8%20.5%2.6%
January 20263164.5%19.4%6.5%
February 20262281.8%4.5%4.5%
March 20263647.2%27.8%0.0%
April 20264586.7%8.9%0.0%
May 20266085.0%8.3%0.0%
June 202610180.2%9.9%0.0%

What drove BOS to PDX delay minutes?

Late aircraft was the largest recorded BOS-to-PDX delay category, accounting for 42.4% of 8,792 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.3%
Late aircraft42.4%
National airspace28.4%
Weather2.6%
Security0.2%
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.