Boston, MA → Chicago, IL flight delays
BOS → ORD · all airlines · 641 flights · April 2026 · source: US BTS
This route is delayed
23%of the time, by +76 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
77%
Delayed 3h+
2.4%
Cancelled
2.2%
Avg when late
+76m
Best & worst day to fly
Most on-time
Sunday
delayed 13%
Worst
Thursday
delayed 30%
Which airline is most punctual on BOS → ORD?
Uniteddelayed 16%
Americandelayed 23%
Republicdelayed 28%
Deltadelayed 30%
JetBluedelayed 31%
Frequently asked
How often is the Boston, MA to Chicago, IL flight delayed?
About 23% of BOS → ORD flights arrive late (15+ minutes), by an average of 76 minutes when they do, based on 641 flights in April 2026.
Which airline is most punctual on BOS → ORD?
United, delayed 16% of the time — the best of the 5 airlines flying this route.
What is the best day to fly BOS → ORD?
Sunday is the most on-time (delayed 13%), while Thursday is the worst (delayed 30%).
Airport overviews