Are there nonstop flights from London (LHR) to Riga (RIX)?

No. The fastest connection is via Copenhagen, about 2h 59m of total flying time.

What is the fastest connection from London (LHR) to Riga (RIX)?

via Copenhagen ≈ 2h 59m, via Hamburg ≈ 3h, via Amsterdam ≈ 3h (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

London Heathrow Airport (LHR) to Riga International Airport (RIX)・1,690 km

No nonstop flights. The fastest connection is via Copenhagen (CPH), about 2h 59m of flying time (layover not included).

With milesANA 15,000 miles+ (via FRA)JAL 15,000 miles+ (via HEL)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

43 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.