San Diego to Atlanta — airline reliability comparison
Delta Air Lines is the most reliable airline on the SAN to ATL route with a 86% on-time rate, compared to Frontier Airlines at 67%. Based on 7,492 flights tracked.
This route involves high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 86% | 0.7% | 76m | 7,492 |
| Southwest AirlinesWN | 84% | 0.0% | 51m | 25 |
| Alaska AirlinesAS | 69% | 1.0% | 51m | 640 |
| Frontier AirlinesF9Worst | 67% | 6.7% | 100m | 150 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.