Are there nonstop flights from Ottawa (YOW) to Portland (PDX)?

No. The fastest connection is via Calgary, about 5h 25m of total flying time.

What is the fastest connection from Ottawa (YOW) to Portland (PDX)?

via Calgary ≈ 5h 25m, via Chicago ≈ 5h 31m, via Vancouver ≈ 5h 39m (estimated flying time, excluding layovers).

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

Ottawa Macdonald-Cartier International Airport (YOW) to Portland International Airport (PDX)・3,607 km

No nonstop flights. The fastest connection is via Calgary (YYC), about 5h 25m of flying time (layover not included).

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

None.

13 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.