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

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

78.1% of 649 official scheduled PDX-to-BOS flights arrived on time; 11.4% arrived at least 30 minutes late and 0.8% 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
78.1%arrived on time
11.4%30+ min late
0.8%cancelled
649scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+3.4 mincompleted flights

Which departure time was most reliable for PDX to BOS?

Among qualifying PDX-to-BOS departure window results, Early morning had the highest on-time rate: 81.4% of 349 flights. Night was lowest at 73.8% across 240 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning34981.4%8.0%0.9%
Afternoon6076.7%16.7%0.0%
Night24073.8%15.0%0.8%

Which weekday was most reliable for PDX to BOS?

Among qualifying PDX-to-BOS weekday results, Sunday had the highest on-time rate: 82.4% of 102 flights. Tuesday was lowest at 74.1% across 81 flights.

DayFlightsOn time30+ minCancelled
Monday10180.2%8.9%3.0%
Tuesday8174.1%14.8%0.0%
Wednesday9176.9%11.0%0.0%
Thursday10076.0%14.0%1.0%
Friday9977.8%11.1%0.0%
Saturday7578.7%8.0%0.0%
Sunday10282.4%11.8%1.0%

Which airline was most reliable for PDX to BOS?

Among qualifying PDX-to-BOS airline results, Alaska Airlines had the highest on-time rate: 81.1% of 533 flights. JetBlue Airways was lowest at 64.7% across 116 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines53381.1%8.4%0.8%
JetBlue Airways11664.7%25.0%0.9%

Which month was most reliable for PDX to BOS?

Among qualifying PDX-to-BOS month results, February 2026 had the highest on-time rate: 95.5% of 22 flights. October 2025 was lowest at 64.6% across 48 flights.

MonthFlightsOn time30+ minCancelled
July 20259268.5%19.6%1.1%
August 20258877.3%10.2%0.0%
September 20254973.5%16.3%0.0%
October 20254864.6%18.8%2.1%
November 20253886.8%5.3%0.0%
December 20253979.5%10.3%0.0%
January 20263076.7%3.3%6.7%
February 20262295.5%0.0%4.5%
March 20263691.7%2.8%0.0%
April 20264582.2%6.7%0.0%
May 20266183.6%11.5%0.0%
June 202610179.2%11.9%0.0%

What drove PDX to BOS delay minutes?

National airspace was the largest recorded PDX-to-BOS delay category, accounting for 35.7% of 7,217 BTS-attributed delay minutes during July 2025–June 2026.

Airline31.9%
Late aircraft32.1%
National airspace35.7%
Weather0.3%
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.