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

Denver, CO (DEN) to Portland, OR (PDX) flight delay odds

Historically, 73.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 4,289 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
73.6%arrived on time
15.7%30+ min late
0.4%cancelled
4,289scheduled 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 late2.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+9.4 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
Early morning86285.8%7.2%0.0%
Late morning88882.3%8.9%0.7%
Afternoon96476.9%12.4%0.2%
Evening1,15760.2%25.5%0.6%
Night41859.1%28.0%1.0%

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
Monday64870.2%18.2%0.2%
Tuesday58078.3%13.6%0.2%
Wednesday57573.0%14.8%0.2%
Thursday65270.6%17.0%0.6%
Friday65973.1%16.2%1.1%
Saturday53376.7%13.7%0.4%
Sunday64274.0%15.6%0.5%

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
United Airlines1,82181.3%12.0%0.4%
Southwest Airlines1,56362.3%21.5%0.3%
Alaska Airlines58176.9%13.3%0.7%
Frontier Airlines31179.7%11.6%0.6%
SkyWest Airlines1346.2%38.5%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202546162.3%22.8%2.2%
August 202543771.4%19.0%0.0%
September 202539582.0%10.4%0.0%
October 202539376.8%12.0%0.0%
November 202534578.6%11.9%1.7%
December 202534665.6%20.5%0.3%
January 202626982.9%11.2%0.4%
February 202624578.8%15.9%0.0%
March 202629469.7%15.6%0.0%
April 202630385.8%7.3%0.0%
May 202636679.0%12.3%0.0%
June 202643560.2%23.7%0.2%

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.

Airline31.7%
Late aircraft53.4%
National airspace13.4%
Weather1.3%
Security0.1%
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.