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Best airline to Puerto Rico

Ranked on one measure only: how often each airline's flights on Puerto Rico routes actually arrived on time. Not seat width, not service — punctuality, from the regulator's own file.

Most punctual on Puerto Rico routes

Delta Air Lines

86.7% on time across 591 flights

# Airline Flights On time
1 Delta Air Lines 591 86.7%
2 United Airlines 720 84.7%
3 American Airlines 780 80%
4 JetBlue Airways 2,695 79.2%
5 Frontier Airlines 1,087 77%
6 Southwest Airlines 868 73.9%

Busiest routes into Puerto Rico

MCO → SJU Orlando to San Juan 604 flights · 75.75% on time C JFK → SJU New York to San Juan 289 flights · 78.95% on time C MIA → SJU Miami to San Juan 214 flights · 84.58% on time B FLL → SJU Fort Lauderdale to San Juan 192 flights · 74.35% on time C PHL → SJU Philadelphia to San Juan 180 flights · 71.91% on time C ATL → SJU Atlanta to San Juan 174 flights · 80.46% on time B TPA → SJU Tampa to San Juan 167 flights · 74.7% on time C EWR → SJU Newark to San Juan 161 flights · 84.38% on time B BOS → SJU Boston to San Juan 126 flights · 73.02% on time C MCO → BQN Orlando to Aguadilla 121 flights · 78.33% on time B BWI → SJU Baltimore to San Juan 109 flights · 62.04% on time D

What "best" means here, and what it does not

Punctuality is one dimension of a good airline and not the one most people would name first. It is, however, the only one that is measured the same way for every carrier and published by somebody with no stake in the answer — which makes it the one worth ranking on.

It is also route-specific. An airline near the bottom of this table may be excellent elsewhere; what the table says is how it ran on these particular routes over this particular period. The same list, worst first →