Nonstop route
Dulles to San Juan nonstop
Yes — United and Frontier fly IAD to SJU nonstop year-round — about daily.
IADDulles
✈
SJUSan Juan
daily14 flights a week
Year-round14/wk Jun vs 15.8/wk Jan
$175–$350typical one-way · median $225
1,572miles nonstop
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Fares are what people actually paid: half of the 1,263 tickets in the US DOT fare survey for this route sold between $175 and $350 one way, median $225. That survey runs a couple of quarters behind, so treat it as the shape of the route's pricing rather than today's quote.
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