Historical on-time performance

ORDBOS

Chicago to Boston

867 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–BOS arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min

Median delayon timetypical arrival

p90 delay75 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
Envoy Airbest	85%	on time	30 min	1.5%	524
Republic Airways	73%	on time	55 min	2.7%	809
United Airlines	69%	on time	75 min	1.0%	2,579
Delta Air Lines	66%	on time	90 min	1.5%	956
American Airlines	63%	on time	80 min	1.7%	1,795
JetBlue Airways	72%	on time	75 min	1.6%	574

Envoy Airbest
On-time85%
Medianon time
p9030 min
Cancel1.5%
Flights524
Republic Airways
On-time73%
Medianon time
p9055 min
Cancel2.7%
Flights809
United Airlines
On-time69%
Medianon time
p9075 min
Cancel1.0%
Flights2,579
Delta Air Lines
On-time66%
Medianon time
p9090 min
Cancel1.5%
Flights956
American Airlines
On-time63%
Medianon time
p9080 min
Cancel1.7%
Flights1,795
JetBlue Airways
On-time72%
Medianon time
p9075 min
Cancel1.6%
Flights574

Why flights run late

Delay causes

Airline20%
Weather5%
Air traffic (NAS)37%
Late aircraft38%
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→ORD airportChicago→BOS airportBoston→Envoy Air on this routecarrier detail→Envoy Airairline profile→