It’s generally more expensive to depart on a Friday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
October can be a great time to fly to Oslo from Philadelphia with a flight ticket averaging about $859. Cheapflights users have found deals in the month of October for as cheap as $506. The most expensive prices can be found in the month of March.
One of the essential ways to save on airfare from Philadelphia to Oslo is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 34% on airfare.