Flight Check

Best Airline: JFK to SJU

New York to San Juan — airline reliability comparison

Delta Air Lines is the most reliable airline on the JFK to SJU route with a 81% on-time rate, compared to Frontier Airlines at 64%. Based on 3,914 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

Delta Air Lines81%
JetBlue Airways67%
Frontier Airlines64%

JFK to SJU Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest81%0.8%63m3,914
JetBlue AirwaysB667%1.8%76m8,007
Frontier AirlinesF9Worst64%2.1%99m1,085

Route Overview

71%
Overall On-Time
75m
Avg Delay
1.6%
Cancel Rate
13,011
Total Flights
JFK to SJU Route DetailsReturn: SJU to JFK
JFK AirportSJU Airport

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