Fly from Boston to Madrid for $350 round-trip, including all taxes, with US Airways/Spanair. This fare is valid for Fall/Winter travel every day of the week except Fridays and Saturdays. Lot's of available dates.

Similarly low fares available to Barcelona.

For booking info, see our fare details page.

All products and services mentioned on Airfarewatchdog are independently selected by our team of expert travelers. If you buy something through our links, we may earn an affiliate commission.

More Stories You'll Love