Historical on-time performance

STLORD

St. Louis to Chicago

258 miData through Dec 2025Source: US DOT · BTS

Flights on STL–ORD arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min

Median delayon timetypical arrival

p90 delay60 min1 in 10 flights is worsetail risk

Cancelled2.1%of scheduled flights

based on 2,615 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	74%	on time	50 min	3.1%	510
American Airlinesbest	85%	on time	20 min	1.8%	446
United Airlines	64%	on time	70 min	0.9%	545
Envoy Air	73%	on time	45 min	2.1%	474
SkyWest Airlines	62%	on time	95 min	2.7%	640

Republic Airways
On-time74%
Medianon time
p9050 min
Cancel3.1%
Flights510
American Airlinesbest
On-time85%
Medianon time
p9020 min
Cancel1.8%
Flights446
United Airlines
On-time64%
Medianon time
p9070 min
Cancel0.9%
Flights545
Envoy Air
On-time73%
Medianon time
p9045 min
Cancel2.1%
Flights474
SkyWest Airlines
On-time62%
Medianon time
p9095 min
Cancel2.7%
Flights640

Why flights run late

Delay causes

Airline33%
Weather6%
Air traffic (NAS)30%
Late aircraft30%
Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→STL airportSt. Louis→ORD airportChicago→Republic Airways on this routecarrier detail→Republic Airwaysairline profile→