Flight Check

Best Airline: MIA to ORD

Miami to Chicago — airline reliability comparison

American Airlines is the most reliable airline on the MIA to ORD route with a 75% on-time rate, compared to Frontier Airlines at 68%. Based on 10,205 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

American Airlines75%
United Airlines74%
Spirit Airlines74%
Frontier Airlines68%

MIA to ORD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
American AirlinesAABest75%1.2%72m10,205
United AirlinesUA74%1.2%83m3,572
Spirit AirlinesNK74%1.9%70m1,725
Frontier AirlinesF9Worst68%3.1%191m32

Route Overview

75%
Overall On-Time
74m
Avg Delay
1.3%
Cancel Rate
15,549
Total Flights
MIA to ORD Route DetailsReturn: ORD to MIA
MIA AirportORD Airport

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