Emirates often offers nonstop BOS→DXB service with generous baggage allowances, high-quality long-haul cabins, and strong Dubai hub connectivity, making it a top choice for May travel. Delta and other U.S. carriers may partner on transatlantic legs or codeshares, while European and Middle Eastern carriers (Lufthansa, Turkish Airlines, Qatar Airways) provide competitive one-stop options via major hubs. Compare seat pitch, meal service, checked baggage rules, and loyalty benefits when choosing — budget-conscious travelers may prefer connecting itineraries for savings, while premium travelers often favor nonstop service or carriers with premium lounges at DXB. Check baggage and change fee policies closely before booking May flights.