Which airline has the most delays ORD to ATL?

Frontier Airlines has the lowest on-time rate on the ORD to ATL route at 61%.

Which airline cancels the most flights ORD to ATL?

Frontier Airlines has the highest cancellation rate on this route at 2.8%.

Best Airline: ORD to ATL

Q: Which airline is most reliable ORD to ATL?

Delta Air Lines is the most reliable airline on the ORD to ATL route with a 80% on-time arrival rate.

Chicago to Atlanta — airline reliability comparison

Delta Air Lines is the most reliable airline on the ORD to ATL route with a 80% on-time rate, compared to Frontier Airlines at 61%. Based on 8,898 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

Delta Air Lines80%

80%

United Airlines79%

Republic Airways76%

American Airlines69%

Spirit Airlines65%

SkyWest Airlines64%

Frontier Airlines61%

ORD to ATL Airline Comparison

Airline	On-Time %	Cancel %	Avg Delay	Flights
Delta Air LinesDLBest	80%	1.3%	79m	8,898
MQ	80%	2.6%	52m	1,155
United AirlinesUA	79%	0.9%	65m	5,641
Republic AirwaysYX	76%	2.4%	58m	577
American AirlinesAA	69%	2.1%	102m	2,260
Spirit AirlinesNK	65%	1.5%	80m	1,254
SkyWest AirlinesOO	64%	0.0%	106m	28
Frontier AirlinesF9Worst	61%	2.8%	101m	1,860

Route Overview

76%

Overall On-Time

80m

Avg Delay

1.5%

Cancel Rate

21,778

Total Flights

ORD to ATL Route Details Return: ATL to ORD

ORD Airport ATL Airport

Flying out of ORD? 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.