Historical on-time performance

BOSORD

Boston to Chicago

867 miData through Dec 2025Source: US DOT · BTS

Flights on BOS–ORD arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min

Median delayon timetypical arrival

p90 delay65 min1 in 10 flights is worsetail risk

Cancelled1.5%of scheduled flights

based on 7,237 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Airline	On-time	Median	p90	Cancel	Flights
Republic Airways	71%	on time	60 min	2.0%	808
Envoy Air	75%	on time	60 min	2.3%	526
United Airlines	75%	on time	55 min	1.1%	2,579
American Airlines	72%	on time	80 min	1.7%	1,794
JetBlue Airwaysbest	75%	on time	65 min	1.0%	574
Delta Air Lines	64%	on time	85 min	1.7%	956

Republic Airways
On-time71%
Medianon time
p9060 min
Cancel2.0%
Flights808
Envoy Air
On-time75%
Medianon time
p9060 min
Cancel2.3%
Flights526
United Airlines
On-time75%
Medianon time
p9055 min
Cancel1.1%
Flights2,579
American Airlines
On-time72%
Medianon time
p9080 min
Cancel1.7%
Flights1,794
JetBlue Airwaysbest
On-time75%
Medianon time
p9065 min
Cancel1.0%
Flights574
Delta Air Lines
On-time64%
Medianon time
p9085 min
Cancel1.7%
Flights956

Why flights run late

Delay causes

Airline23%
Weather3%
Air traffic (NAS)31%
Late aircraft43%
Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→BOS airportBoston→ORD airportChicago→Republic Airways on this routecarrier detail→Republic Airwaysairline profile→