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

Raleigh/Durham, NC (RDU) to Denver, CO (DEN) flight delay odds

Historically, 79.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,771 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
79.0%arrived on time
12.7%30+ min late
0.8%cancelled
1,771scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.1%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+5.3 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 morning72790.9%3.4%1.1%
Late morning5988.1%6.8%1.7%
Afternoon50175.8%16.2%0.4%
Evening46662.7%24.2%0.6%

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
Monday26773.4%16.1%0.7%
Tuesday24684.1%9.3%0.0%
Wednesday23184.4%8.2%0.0%
Thursday26278.2%12.6%0.8%
Friday26575.1%17.7%0.0%
Saturday23881.1%12.2%0.8%
Sunday26277.9%11.8%3.4%

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 Airlines77685.4%9.4%0.6%
Southwest Airlines70973.2%15.2%0.8%
Frontier Airlines28675.9%15.4%1.4%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202518365.0%24.0%0.5%
August 202516369.3%19.0%1.2%
September 202513380.5%13.5%0.0%
October 202513684.6%9.6%0.0%
November 202513884.8%7.2%0.0%
December 202514769.4%17.7%0.0%
January 202613881.9%7.2%5.8%
February 202612886.7%9.4%1.6%
March 202614984.6%12.1%0.7%
April 202614783.0%9.5%0.0%
May 202615588.4%7.1%0.6%
June 202615476.0%11.7%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.

Airline21.9%
Late aircraft43.0%
National airspace29.4%
Weather5.0%
Security0.7%
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.