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

Raleigh/Durham, NC (RDU) to Chicago, IL (ORD) flight delay odds

72.2% of 3,589 official scheduled RDU-to-ORD flights arrived on time; 16.8% arrived at least 30 minutes late and 2.4% 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
72.2%arrived on time
16.8%30+ min late
2.4%cancelled
3,589scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.3%all scheduled flights
120+ minutes late4.8%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+15.4 mincompleted flights

Which departure time was most reliable for RDU to ORD?

Among qualifying RDU-to-ORD departure window results, Late morning had the highest on-time rate: 86.5% of 620 flights. Evening was lowest at 50.3% across 748 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning91384.9%7.4%2.8%
Late morning62086.5%8.4%1.5%
Afternoon1,27369.8%18.5%2.4%
Evening74850.3%30.7%2.5%

Which weekday was most reliable for RDU to ORD?

Among qualifying RDU-to-ORD weekday results, Tuesday had the highest on-time rate: 75.4% of 483 flights. Sunday was lowest at 69.0% across 554 flights.

DayFlightsOn time30+ minCancelled
Monday55372.0%17.0%2.9%
Tuesday48375.4%15.5%2.1%
Wednesday48275.1%15.4%1.0%
Thursday54471.1%17.5%2.6%
Friday53469.9%17.6%1.1%
Saturday43973.8%14.1%3.2%
Sunday55469.0%19.5%4.0%

Which airline was most reliable for RDU to ORD?

Among qualifying RDU-to-ORD airline results, American Airlines had the highest on-time rate: 79.2% of 553 flights. Frontier Airlines was lowest at 54.2% across 131 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,29575.2%14.1%1.2%
Republic Airways1,01867.5%19.4%3.6%
American Airlines55379.2%11.9%3.4%
Envoy Air52370.4%19.3%1.7%
Frontier Airlines13154.2%32.8%5.3%
SkyWest Airlines6776.1%14.9%0.0%
PSA Airlines250.0%50.0%0.0%

Which month was most reliable for RDU to ORD?

Among qualifying RDU-to-ORD month results, September 2025 had the highest on-time rate: 82.7% of 266 flights. July 2025 was lowest at 63.0% across 276 flights.

MonthFlightsOn time30+ minCancelled
July 202527663.0%22.8%2.5%
August 202527372.5%17.6%2.9%
September 202526682.7%7.1%0.0%
October 202532770.9%19.3%0.3%
November 202530972.2%17.5%3.9%
December 202529071.0%20.7%1.0%
January 202623369.5%13.3%7.3%
February 202624477.5%12.3%1.2%
March 202631665.8%22.2%2.8%
April 202635468.9%19.8%2.0%
May 202637479.7%12.0%1.1%
June 202632772.2%15.0%4.9%

What drove RDU to ORD delay minutes?

National airspace was the largest recorded RDU-to-ORD delay category, accounting for 35.2% of 83,068 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.9%
Late aircraft34.6%
National airspace35.2%
Weather7.2%
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.