Are there nonstop flights from London (LCY) to Portland (PDX)?

No. The fastest connection is via Amsterdam, about 10h 51m of total flying time.

What is the fastest connection from London (LCY) to Portland (PDX)?

via Amsterdam ≈ 10h 51m, via Frankfurt am Main ≈ 11h 36m (estimated flying time, excluding layovers).

London City Airport (LCY) to Portland International Airport (PDX)・7,905 km

No nonstop flights. The fastest connection is via Amsterdam (AMS), about 10h 51m of flying time (layover not included).

None.

2 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.