I do not really know the prices for Europe but you should be able to find return flights for about 600 $. I just checked Skyscanner and just made one search for Miami London return mid January . Might be more expensive in summer and might aswell be more expensive if you fly to other locations in Europe or want to fly to London and leave from Madrid for example . So let ' s say 700 $. I wouldn ' t pay more than that . This leaves you with 1300 $ or 62 $ per day for the actual traveling , that should be enough for western Europe too if you stay at cheap hostels and maybe couchsurf from time to time . I don ' t know if you really want to go to Patagonia during winter . I haven ' t been there yet but I heard about flooded streets , closed ferry routes and thelike during winter . Won ' t be easy to travel . Flights down there are more expensive too . And it ' s gonna be cold , like , below 0 C 32 F cold . If you need help planing and stuff you can PM me too if you like Have fun !