Which airline has the most delays ATL to ORD?

Frontier Airlines has the lowest on-time rate on the ATL to ORD route at 66%.

Which airline cancels the most flights ATL to ORD?

SkyWest Airlines has the highest cancellation rate on this route at 3.7%.

Best Airline: ATL to ORD

Q: Which airline is most reliable ATL to ORD?

SkyWest Airlines is the most reliable airline on the ATL to ORD route with a 88% on-time arrival rate.

Atlanta to Chicago — airline reliability comparison

SkyWest Airlines is the most reliable airline on the ATL to ORD route with a 88% on-time rate, compared to Frontier Airlines at 66%. Based on 27 flights tracked.

This route involves weather-prone airports and high-congestion airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

SkyWest Airlines88%

American Airlines80%

United Airlines80%

Republic Airways79%

74%

Delta Air Lines74%

Spirit Airlines70%

Frontier Airlines66%

ATL to ORD Airline Comparison

Airline	On-Time %	Cancel %	Avg Delay	Flights
SkyWest AirlinesOOBest	88%	3.7%	75m	27
American AirlinesAA	80%	1.9%	100m	2,263
United AirlinesUA	80%	1.2%	86m	5,639
Republic AirwaysYX	79%	3.1%	71m	577
MQ	74%	2.4%	77m	1,152
Delta Air LinesDL	74%	1.3%	56m	8,899
Spirit AirlinesNK	70%	1.4%	71m	1,255
Frontier AirlinesF9Worst	66%	3.1%	97m	1,857

Route Overview

75%

Overall On-Time

75m

Avg Delay

1.6%

Cancel Rate

21,779

Total Flights

ATL to ORD Route Details Return: ORD to ATL

ATL Airport ORD Airport

Flying out of ATL? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

Data last updated October 2026. Source: Bureau of Transportation Statistics.