(Undated) -- Valentine's Day is Sunday and a nationwide survey by WalletHub shows Portland to be among the best cities in which to celebrate Valentine's Day. The survey measures the largest cities considered to be the most romantic while being easy on our finances. Key factors include restaurant-meal costs, florists per capita and access to Valentine's Day gifts. Portland is ranked seventh in the U.S., with San Francisco ranked number one. Scottsdale, Arizona, is ranked second, followed by Honolulu, Orlando and Seattle.