I receive compensation for many links on this blog. You don’t have to use these links, but I am grateful to you if you do. American Express, Citibank, Chase, Capital One and other banks are advertising partners of this site. Any opinions expressed in this post are my own, and have not been reviewed, approved, or endorsed by my advertising partners. I do not write about all credit cards that are available -- instead focusing on miles, points, and cash back (and currencies that can be converted into the same).
Via Airfare Spot you can fly non-stop to Madrid from $350 roundtrip leaving from New York, Boston, or Miami.
Travel is on American Airlines or Iberia and will often come up as a codeshare flight using one of their joint venture airline partners British Airways or Finnair.
You can see the fare broadly for $381 roundtrip, for instance:
Breaking down the ticket, it appears to be a $45 base fare in each direction.
You can actually book this even cheaper, found using airfare metasearch site Momondo:
For this New York fare, travel is permitted through April 6, and again starting October 30.
Boston non-stops are a little bit higher — from $362 — but connecting travel on Star Alliance airlines is available at the $350 price.