US Airways is using an Airbus A320 on the new flights, seating 12 in first class and 138 in economy.
Here's the flight schedule:
Portland to Philadelphia
US8078 Departs 10:45pm Arrives 6:50am
Philadelphia to Portland
US8022 Departs 8:30pm Arrives 11:25pm
Click here to read the press release from US Airways.
Click here to read the press release from the Port of Portland.