Delta, American, Air Canada and their partners have some very good fares between the East Coast and Barcelona.
Need to Know
- Airlines: Delta, American, Air France, Air Canada, Iberia, Finnair
- Dates: January to March, 2017
- Leave from: Boston, New York
- Travel to: Barcelona
- Price: $376-$391
These fares can be found by searching ITA or Google Flights and can be booked directly with the airlines or via your favorite online site.
For more info and analysis along with sample fares and dates, see: this The Points Guy post.