Historical on-time performance
Chicago to Washington
577 miData through Dec 2025Source: US DOT · BTS
No flights recorded for last 12 months on this route.
By airline
How each carrier compares
No airline figures for this window yet.
Why flights run late
Delay causes
Delay-cause data appears once delayed flights are recorded for this window.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MDW → IAD
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 57% to 86% on time.
- Mornings86% on time · p90 15 min · 306 flights
- Middays86% on time · p90 15 min · 97 flights · limited
- Afternoons76% on time · p90 35 min · 169 flights · limited
- Evenings68% on time · p90 35 min · 251 flights
- Overnights57% on time · p90 55 min · 81 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 85% on time.
- Tuesdays85% on time · p90 30 min · 145 flights · limited
- Thursdays80% on time · p90 20 min · 148 flights · limited
- Wednesdays78% on time · p90 35 min · 145 flights · limited
- Saturdays77% on time · p90 20 min · 56 flights · limited
- Mondays74% on time · p90 25 min · 149 flights · limited
- Fridays73% on time · p90 35 min · 150 flights · limited
- Sundays66% on time · p90 45 min · 111 flights · limited
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