Which airline has the most delays ATL to PHL?

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

Which airline cancels the most flights ATL to PHL?

PSA Airlines has the highest cancellation rate on this route at 3.0%.

Best Airline: ATL to PHL

Q: Which airline is most reliable ATL to PHL?

Republic Airways is the most reliable airline on the ATL to PHL route with a 88% on-time arrival rate.

Atlanta to Philadelphia — airline reliability comparison

Republic Airways is the most reliable airline on the ATL to PHL route with a 88% on-time rate, compared to Frontier Airlines at 61%. Based on 418 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

Republic Airways88%

PSA Airlines82%

American Airlines81%

Southwest Airlines78%

Delta Air Lines78%

Spirit Airlines75%

Frontier Airlines61%

ATL to PHL Airline Comparison

Airline	On-Time %	Cancel %	Avg Delay	Flights
Republic AirwaysYXBest	88%	2.5%	98m	418
PSA AirlinesOH	82%	3.0%	90m	2,026
American AirlinesAA	81%	1.2%	109m	2,240
Southwest AirlinesWN	78%	0.3%	49m	1,170
Delta Air LinesDL	78%	1.4%	54m	10,441
Spirit AirlinesNK	75%	1.6%	59m	1,100
Frontier AirlinesF9Worst	61%	2.3%	84m	3,205

Route Overview

75%

Overall On-Time

71m

Avg Delay

1.8%

Cancel Rate

20,683

Total Flights

ATL to PHL Route Details Return: PHL to ATL

ATL Airport PHL 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.