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

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

70.0% of 2,696 official scheduled ORD-to-BWI flights arrived on time; 18.1% arrived at least 30 minutes late and 2.6% 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 SIGNALVariable
70.0%arrived on time
18.1%30+ min late
2.6%cancelled
2,696scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.5%all scheduled flights
120+ minutes late3.8%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+12.7 mincompleted flights

Which departure time was most reliable for ORD to BWI?

Among qualifying ORD-to-BWI departure window results, Early morning had the highest on-time rate: 85.1% of 612 flights. Evening was lowest at 60.5% across 731 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning61285.1%6.5%2.0%
Late morning34974.8%14.9%0.6%
Afternoon89666.5%20.8%3.0%
Evening73160.5%23.8%3.6%
Night10861.1%32.4%1.9%

Which weekday was most reliable for ORD to BWI?

Among qualifying ORD-to-BWI weekday results, Saturday had the highest on-time rate: 74.0% of 335 flights. Wednesday was lowest at 67.1% across 356 flights.

DayFlightsOn time30+ minCancelled
Monday41467.4%22.7%1.4%
Tuesday36173.1%16.9%2.2%
Wednesday35667.1%19.1%0.8%
Thursday40673.4%14.0%3.2%
Friday40367.7%19.6%1.7%
Saturday33574.0%13.7%3.6%
Sunday42167.7%19.5%4.8%

Which airline was most reliable for ORD to BWI?

Among qualifying ORD-to-BWI airline results, Envoy Air had the highest on-time rate: 73.4% of 903 flights. SkyWest Airlines was lowest at 61.0% across 41 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,15169.9%17.5%1.4%
Envoy Air90373.4%15.4%3.8%
Republic Airways27467.9%21.5%3.6%
Frontier Airlines15062.7%22.7%4.0%
Southwest Airlines12462.1%23.4%1.6%
SkyWest Airlines4161.0%31.7%2.4%
Spirit Airlines2777.8%14.8%0.0%
American Airlines2657.7%26.9%0.0%

Which month was most reliable for ORD to BWI?

Among qualifying ORD-to-BWI month results, September 2025 had the highest on-time rate: 80.6% of 248 flights. March 2026 was lowest at 58.6% across 198 flights.

MonthFlightsOn time30+ minCancelled
July 202524759.9%23.9%4.0%
August 202525373.9%16.2%1.2%
September 202524880.6%10.9%0.0%
October 202524678.5%11.0%0.0%
November 202521567.4%17.2%7.0%
December 202520759.9%24.6%1.9%
January 202615068.0%18.7%5.3%
February 202616774.3%16.2%2.4%
March 202619858.6%29.8%5.6%
April 202625268.7%16.7%3.2%
May 202627474.5%13.5%0.4%
June 202623971.1%21.8%2.1%

What drove ORD to BWI delay minutes?

Late aircraft was the largest recorded ORD-to-BWI delay category, accounting for 45.6% of 49,158 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.9%
Late aircraft45.6%
National airspace21.3%
Weather10.2%
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.