Flight Check

Best Airline: ATL to SAT

Atlanta to San Antonio — airline reliability comparison

Delta Air Lines is the most reliable airline on the ATL to SAT route with a 81% on-time rate, compared to Frontier Airlines at 62%. Based on 8,576 flights tracked.

This route involves 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 Lines81%
Southwest Airlines80%
Spirit Airlines75%
Frontier Airlines62%

ATL to SAT Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest81%1.1%54m8,576
Southwest AirlinesWN80%0.4%49m2,001
Spirit AirlinesNK75%0.0%60m83
Frontier AirlinesF9Worst62%4.5%84m201

Route Overview

80%
Overall On-Time
54m
Avg Delay
1.1%
Cancel Rate
10,927
Total Flights
ATL to SAT Route DetailsReturn: SAT to ATL
ATL AirportSAT Airport

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