Historical on-time performance
Baltimore to Chicago
621 miData through May 2026Source: US DOT · BTS
Flights on BWI–ORD arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled2.3%of scheduled flights
based on 2,363 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time84%Medianon timep9015 minCancel2.7%Flights187
- Southwest AirlinesOn-time84%Medianon timep9020 minCancel0.7%Flights153
- United AirlinesbestOn-time75%Medianon timep9050 minCancel1.2%Flights1,091
- Envoy AirOn-time70%Medianon timep9065 minCancel3.9%Flights932
Why flights run late
Delay causes
- Airline21%
- Weather14%
- Air traffic (NAS)34%
- Late aircraft31%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline4%
- Weather51%
- Air traffic (NAS)45%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 55 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BWI → ORD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 2,517 flights
- Middays84% on time · p90 25 min · 2,803 flights
- Overnights67% on time · p90 65 min · 646 flights
- Afternoons63% on time · p90 60 min · 342 flights
- Evenings60% on time · p90 85 min · 1,804 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Saturdays81% on time · p90 30 min · 986 flights
- Wednesdays80% on time · p90 35 min · 1,137 flights
- Tuesdays80% on time · p90 35 min · 1,118 flights
- Mondays78% on time · p90 40 min · 1,229 flights
- Sundays77% on time · p90 45 min · 1,185 flights
- Thursdays77% on time · p90 45 min · 1,231 flights
- Fridays74% on time · p90 40 min · 1,226 flights
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