Can a Boeing 737 Fly Nonstop from New York to London?

No. The Boeing 737 family (including 737-800, MAX 8) lacks the range for a nonstop JFK/LGA/EWR → LHR/LGW/STN flight.

• 737-800 max range: ~3,200 nmi (5,925 km) with full payload.
• 737 MAX 8 max range: ~3,550 nmi (6,570 km).
• NYC–London great-circle distance: ~3,000 nmi (5,560 km) but prevailing westerlies add headwind; required still-air range >3,500 nmi for reliable year-round operation with reserves.

Airlines use widebodies for this route: Airbus A330, A350; Boeing 767, 777, 787. Rare 737 "tag" flights (e.g., via Shannon or Keflavik) are technical stops, not nonstop.