Flights from Boston (BOS), Miami (MIA), and New York City (JFK) to Ibiza (IBZ) starting at $471 RT.
BOS - IBZ $471 RT
MIA - IBZ $516 RT
JFK - IBZ $478 RT
Expanded cities to other Ballearic Islands available (i.e. Fort Lauderdale, Newark, or Seattle to Mallorca and/or Menorca).
Airline(s): American, Iberia, KLM, Air France, United, Swiss, Air Europa
When: Ranges, but generally October - March including Thanksgiving, excluding Christmas
How To Book: Search Google Flights for dates, then compare on Momondo. If not any cheaper, book directly via Google.