Cheap Frontier Airlines flights Boston (BOS) to San José (SJO)

Cheap Frontier Airlines flights Boston (BOS) to San José (SJO)

Prices were available within the past 7 days and start at for one-way flights and $669 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Dec 26 - Fri, Jan 9

BOS

Boston

SJO

San José

$669 Roundtrip, found 2 days ago

$669

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Dec 26 from Boston to San José, returning Fri, Jan 9, priced at $669 found 2 days ago