Are there nonstop flights from London (LHR) to Monterrey (MTY)?

No. The fastest connection is via Toronto, about 10h 55m of total flying time.

What is the fastest connection from London (LHR) to Monterrey (MTY)?

via Toronto ≈ 10h 55m, via Houston ≈ 10h 55m, via Detroit ≈ 10h 55m (estimated flying time, excluding layovers).

from 27,500 ANA miles, from 37,000 JAL miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Monterrey International Airport (MTY)・8,423 km

No nonstop flights. The fastest connection is via Toronto (YYZ), about 10h 55m of flying time (layover not included).

With milesANA 27,500 miles+ (via YYZ)JAL 37,000 miles+ (via DFW)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

22 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.