Booked my flight today on TAP (Portugal) from Boston (departing 7:40 pm, 3/20) to Seville (arriving 9:20 am, 3/21) for $413. And the return is from Madrid. Best ever! There's a change of plane in Lisbon (but no arriving in Madrid and having to spend time on the train to Seville). Check out TAP if you are planning to head to Seville for the VdlP.