San Juan to Newark — airline reliability comparison
Spirit Airlines is the most reliable airline on the SJU to EWR route with a 76% on-time rate, compared to Frontier Airlines at 68%. Based on 895 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.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Spirit AirlinesNKBest | 76% | 4.1% | 79m | 895 |
| United AirlinesUA | 73% | 2.1% | 94m | 3,940 |
| JetBlue AirwaysB6 | 72% | 1.6% | 94m | 2,214 |
| Frontier AirlinesF9Worst | 68% | 1.9% | 62m | 840 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.