I assume you'll be flying in from the U.S.? Stockholm has a remarkably busy airport, but the only flights from the U.S. are on Delta through JFK and United from Newark.
Your 14 day Scandanavian tour takes you to many of the region's other cities with active airports. Tallin and Helsinki would be great to visit, but there are no flights to Tallin from the U.S. FinnAir flights are available to Helsinki from DFW, JFK and seasonally from O'Hare, Miami and SEATAC. The ferries are very popular ways to get from Helsinki into Stockholm.
But you can fly into Stockholm from virtually any of the gateway airports in Europe. Of course most of them are very far south of Stockholm which is located pretty far north.
Your tour ends in Bergen, Norway--on the western coast of the country. We adore that city. When we flew out of Bergan, we made connections in Oslo. But there are no longer any non-stop flights to North America from either city. You'll have to connect through one of the big gateway airports to get home.