You can get to Boston - USA and back to Barcelona - Spain for only 159 euros.
Here are some example dates:
11.-25.1.2019
13.-27.1.2019
15.-29.1.2019
22.1.-3.2.2019
10.-24.2.2019
17.2.-3.3.2019
3.-17.3.2019
5.-19.3.2019
8.-22.3.2019
Search for your flights HERE use Barcelona - Boston in search.
Booking - Here you can book accommodation with 10% discount
Booking - And if its better deal for you, here you get 15 euros back from each accommodation you book (limited number)
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