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

Chattanooga, TN (CHA) to Chicago, IL (ORD) flight delay odds

66.8% of 953 official scheduled CHA-to-ORD flights arrived on time; 18.7% arrived at least 30 minutes late and 4.1% 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 SIGNALHigher disruption
66.8%arrived on time
18.7%30+ min late
4.1%cancelled
953scheduled 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 late4.9%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+15.3 mincompleted flights

Which departure time was most reliable for CHA to ORD?

Among qualifying CHA-to-ORD departure window results, Early morning had the highest on-time rate: 78.5% of 400 flights. Evening was lowest at 53.3% across 302 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning40078.5%12.0%2.5%
Late morning9870.4%16.3%6.1%
Afternoon15360.8%24.2%4.6%
Evening30253.3%25.5%5.3%

Which weekday was most reliable for CHA to ORD?

Among qualifying CHA-to-ORD weekday results, Saturday had the highest on-time rate: 74.8% of 107 flights. Sunday was lowest at 60.4% across 139 flights.

DayFlightsOn time30+ minCancelled
Monday14560.7%24.8%6.9%
Tuesday13271.2%18.2%1.5%
Wednesday14469.4%19.4%2.8%
Thursday14268.3%15.5%4.2%
Friday14465.3%18.1%2.1%
Saturday10774.8%13.1%7.5%
Sunday13960.4%20.1%4.3%

Which airline was most reliable for CHA to ORD?

Among qualifying CHA-to-ORD airline results, Envoy Air had the highest on-time rate: 73.2% of 205 flights. Republic Airways was lowest at 64.3% across 238 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines51065.5%18.0%5.1%
Republic Airways23864.3%21.4%3.4%
Envoy Air20573.2%17.1%2.4%

Which month was most reliable for CHA to ORD?

Among qualifying CHA-to-ORD month results, August 2025 had the highest on-time rate: 87.5% of 24 flights. July 2025 was lowest at 51.7% across 29 flights.

MonthFlightsOn time30+ minCancelled
July 20252951.7%27.6%0.0%
August 20252487.5%8.3%0.0%
September 20255870.7%20.7%0.0%
October 202513270.5%18.9%0.0%
November 202511871.2%14.4%6.8%
December 20256261.3%32.3%3.2%
January 20265763.2%14.0%5.3%
February 20267764.9%28.6%0.0%
March 202615758.6%21.0%8.9%
April 202615364.7%15.0%6.5%
May 20265381.1%9.4%1.9%
June 20263375.8%9.1%3.0%

What drove CHA to ORD delay minutes?

Late aircraft was the largest recorded CHA-to-ORD delay category, accounting for 36.0% of 19,969 BTS-attributed delay minutes during July 2025–June 2026.

Airline29.4%
Late aircraft36.0%
National airspace29.2%
Weather5.4%
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.