San Francisco to Atlanta — airline reliability comparison
Delta Air Lines is the most reliable airline on the SFO to ATL route with a 85% on-time rate, compared to Frontier Airlines at 59%. Based on 8,418 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 | 85% | 0.7% | 69m | 8,418 |
| United AirlinesUA | 80% | 0.7% | 56m | 2,120 |
| Frontier AirlinesF9Worst | 59% | 3.1% | 78m | 1,059 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.