Average flight for a family of four to Berlin from Boston is about $1,267.71 with a usual one stop.
http://www.kayak.com/
Cheapest Price: $1141
Highest Price: $2285
Average flight for a family of four is about: $1474.53 with one stop.
http://www.tripadvisor.com/CheapFlights?geo=187275&pax0=a&pax1=a&pax2=7&pax3=12&travelers=4&cos=0&nonstop=no&airport0=BOS&nearby0=no&airport1=FRA&nearby1=no&date0=20140424&time0=0024&date1=20140501&ti
Cheapest Price: $1327.20
Highest Price: $1924.90
http://www.kayak.com/
Cheapest Price: $1141
Highest Price: $2285
Average flight for a family of four is about: $1474.53 with one stop.
http://www.tripadvisor.com/CheapFlights?geo=187275&pax0=a&pax1=a&pax2=7&pax3=12&travelers=4&cos=0&nonstop=no&airport0=BOS&nearby0=no&airport1=FRA&nearby1=no&date0=20140424&time0=0024&date1=20140501&ti
Cheapest Price: $1327.20
Highest Price: $1924.90