ORD (Chicago) to BOS (Boston) flights arrive on time 73% of the time. The most reliable airline on this route is Delta Air Lines at 80%. The average delay is 47 minutes. Delays on this route are most often caused by weather.
Source: Bureau of Transportation Statistics. Updated March 2026.ORD → BOS
ORD (Chicago) to BOS (Boston)
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ORD → BOS on-time performance by month
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This route is delayed fairly often. About 73% of flights arrive on schedule.
Delays on this route are most often caused by weather.
Airlines are roughly equal on this route — Delta Air Lines leads slightly at 80% vs American Airlines at 77%.
Airline Comparison
Delta Air Lines leads at 80% on time; American Airlines trails at 77%.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.