Are there nonstop flights from London (LHR) to San Juan (SJU)?

No. The fastest connection is via Punta Cana, about 9h 24m of total flying time.

What is the fastest connection from London (LHR) to San Juan (SJU)?

via Punta Cana ≈ 9h 24m, via Madrid ≈ 9h 58m, via Boston ≈ 10h 21m (estimated flying time, excluding layovers).

from 35,000 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Luis Munoz Marin International Airport (SJU)・6,730 km

No nonstop flights. The fastest connection is via Punta Cana (PUJ), about 9h 24m of flying time (layover not included).

With milesANA 35,000 miles+ (via EWR)JAL 37,000 miles+ (via MAD)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

26 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.