Most travellers find the cheapest return flights to Portland when choosing a flight departing in February.
In general, most flyers find the cheapest time to book a flight to Portland is about 37 days prior.
In general, booking your departure to Portland for a Wednesday represents the best deal on airfare. Try to avoid a Monday departure to stay away from the highest prices.
Typically, cheap prices to Portland are most often found for afternoon flights. Cheap prices are less likely for midday flights.