Are there nonstop flights from Quebec (YQB) to Seattle (SEA)?

No. The fastest connection is via Calgary, about 5h 30m of total flying time.

What is the fastest connection from Quebec (YQB) to Seattle (SEA)?

via Calgary ≈ 5h 30m, via Vancouver ≈ 5h 41m, via Toronto ≈ 5h 45m (estimated flying time, excluding layovers).

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

Quebec Jean Lesage International Airport (YQB) to Seattle–Tacoma International Airport (SEA)・3,783 km

No nonstop flights. The fastest connection is via Calgary (YYC), about 5h 30m of flying time (layover not included).

With milesANA 15,000 miles+ (via YYZ)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.