If you’re flying from North America, Delta Air Lines is one of the Best Airlines to Fly to Spain. With direct flights from cities like New York (JFK), Atlanta, and Boston to Madrid and Barcelona, Delta provides a convenient and smooth option for the U.S.-based travelers. Delta’s economy class offers generous legroom, free inflight entertainment, Wi-Fi options, and complimentary snacks and beverages. If you’re looking for more luxury, the Delta One experience includes lie-flat seats, chef-curated meals, premium wine selections, and access to Delta Sky Club lounges. The airline also earns praise for its easy-to-use Fly Delta app, which makes checking in, choosing seats, and managing your trip simple. Delta’s SkyMiles program allows passengers to earn miles with every flight, which can be redeemed for upgrades and other perks. Delta places a strong emphasis on safety and cleanliness, which is especially important for families and frequent flyers. Their consistent performance, excellent customer service, and range of flight options make them one of best airlines for American travelers.