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

Portland, OR (PDX) to Detroit, MI (DTW) flight delay odds

Historically, 77.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 390 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
77.4%arrived on time
12.3%30+ min late
0.8%cancelled
390scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.9%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+16.0 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Late morning14282.4%9.9%0.0%
Night23375.5%13.7%1.3%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday6280.6%11.3%1.6%
Tuesday5082.0%6.0%0.0%
Wednesday4973.5%12.2%0.0%
Thursday6172.1%21.3%0.0%
Friday6283.9%4.8%1.6%
Saturday4379.1%14.0%0.0%
Sunday6371.4%15.9%1.6%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines39077.4%12.3%0.8%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20255771.9%17.5%0.0%
August 20255076.0%10.0%0.0%
September 20254285.7%7.1%0.0%
October 20254889.6%8.3%0.0%
November 20252979.3%13.8%0.0%
December 20253158.1%16.1%3.2%
January 2026475.0%25.0%0.0%
March 20262470.8%16.7%4.2%
April 20263093.3%0.0%0.0%
May 20263164.5%19.4%3.2%
June 20264479.5%13.6%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline51.8%
Late aircraft43.1%
National airspace5.1%
Weather0.0%
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.