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

Baltimore, MD (BWI) to Chicago, IL (ORD) flight delay odds

72.9% of 2,690 official scheduled BWI-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
72.9%arrived on time
16.8%30+ min late
2.4%cancelled
2,690scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.7%all scheduled flights
120+ minutes late4.9%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+15.3 mincompleted flights

Which departure time was most reliable for BWI to ORD?

Among qualifying BWI-to-ORD departure window results, Early morning had the highest on-time rate: 87.7% of 754 flights. Evening was lowest at 54.2% across 927 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning75487.7%5.3%2.0%
Late morning78382.5%9.3%1.9%
Afternoon20365.5%26.6%2.5%
Evening92754.2%30.2%3.2%

Which weekday was most reliable for BWI to ORD?

Among qualifying BWI-to-ORD weekday results, Saturday had the highest on-time rate: 78.5% of 335 flights. Sunday was lowest at 69.0% across 422 flights.

DayFlightsOn time30+ minCancelled
Monday41470.3%19.1%2.9%
Tuesday36176.2%13.3%1.7%
Wednesday35473.2%18.9%1.1%
Thursday40172.8%16.0%1.7%
Friday40371.7%15.4%2.7%
Saturday33578.5%13.1%2.7%
Sunday42269.0%20.9%3.8%

Which airline was most reliable for BWI to ORD?

Among qualifying BWI-to-ORD airline results, Southwest Airlines had the highest on-time rate: 84.7% of 124 flights. SkyWest Airlines was lowest at 42.9% across 42 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,14874.0%15.9%1.3%
Envoy Air90371.7%18.1%3.8%
Republic Airways27480.3%9.5%2.9%
Frontier Airlines15061.3%26.0%4.0%
Southwest Airlines12484.7%6.5%0.8%
SkyWest Airlines4242.9%40.5%2.4%
American Airlines2638.5%46.2%0.0%
Spirit Airlines2382.6%17.4%0.0%

Which month was most reliable for BWI to ORD?

Among qualifying BWI-to-ORD month results, September 2025 had the highest on-time rate: 81.9% of 248 flights. December 2025 was lowest at 60.5% across 205 flights.

MonthFlightsOn time30+ minCancelled
July 202524361.7%26.3%4.1%
August 202525274.6%17.9%1.2%
September 202524881.9%11.3%0.0%
October 202524678.0%13.0%0.0%
November 202521668.5%19.9%6.0%
December 202520560.5%24.9%2.0%
January 202615169.5%13.2%5.3%
February 202616680.7%9.6%2.4%
March 202619868.7%20.2%4.0%
April 202625374.7%15.4%3.2%
May 202627378.4%13.6%0.7%
June 202623974.1%15.5%2.1%

What drove BWI to ORD delay minutes?

National airspace was the largest recorded BWI-to-ORD delay category, accounting for 33.0% of 62,588 BTS-attributed delay minutes during July 2025–June 2026.

Airline19.5%
Late aircraft30.7%
National airspace33.0%
Weather16.8%
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.