Are there nonstop flights from London (LHR) to Guatemala City (GUA)?

No. The fastest connection is via Miami, about 11h 18m of total flying time.

What is the fastest connection from London (LHR) to Guatemala City (GUA)?

via Miami ≈ 11h 18m, via Cancún ≈ 11h 19m, via Orlando ≈ 11h 20m (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 La Aurora International Airport (GUA)・8,749 km

No nonstop flights. The fastest connection is via Miami (MIA), about 11h 18m of flying time (layover not included).

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

None.

17 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.