Are there nonstop flights from Halifax (YHZ) to Seattle (SEA)?

No. The fastest connection is via Calgary, about 6h 15m of total flying time.

What is the fastest connection from Halifax (YHZ) to Seattle (SEA)?

via Calgary ≈ 6h 15m, via Edmonton ≈ 6h 23m, via Toronto ≈ 6h 24m (estimated flying time, excluding layovers).

from 15,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Halifax / Stanfield International Airport (YHZ) to Seattle–Tacoma International Airport (SEA)・4,428 km

No nonstop flights. The fastest connection is via Calgary (YYC), about 6h 15m of flying time (layover not included).

With milesANA 15,000 miles+ (via YYZ)JAL 23,000 miles+ (via PHL)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

14 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.