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Compare San Juan nonstop round-trip and open-jaw split fares for Dec 20–Jan 5, 2026, then add bags, seats, transfers before the $150 all-in savings rule. Independent technical note mirroring the canonical version: https://www.mightytravels.com/2026/11/san-juan-nonstop-fares-2026-dec-20jan-5-peak-vs-open-jaw-split-or-nonstop/
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