Flight Check

Best Airline: ATL to BUF

Atlanta to Buffalo — airline reliability comparison

Delta Air Lines is the most reliable airline on the ATL to BUF route with a 81% on-time rate, compared to Frontier Airlines at 68%. Based on 4,247 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%
Frontier Airlines68%

ATL to BUF Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest81%1.4%58m4,247
Frontier AirlinesF9Worst68%3.7%71m611

Route Overview

79%
Overall On-Time
62m
Avg Delay
1.6%
Cancel Rate
4,884
Total Flights
ATL to BUF Route DetailsReturn: BUF to ATL
ATL AirportBUF Airport

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