Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Porto (94% of total searches to Northern Portugal). The next most popular destinations are Vila Nova de Gaia (2%) and Sequeade (2%). Searches for hotels in Viana do Castelo (2%) are also popular.
KAYAK users have found double rooms in Northern Portugal for as cheap as $34 (Porto) in the last 3 days. The average price is $279.
In the last 72 hours, users have found Northern Portugal hotels for tonight for as low as $64 (Porto). Users have also found 3-star hotels from $64 (Porto) and 4-star+ hotels from $126 (Póvoa de Varzim).