Start with the route, not the checklist
Arequipa and Colca Canyon work well as an extension before or after Cusco, but the right order depends on your arrival city and onward connection. Arequipa gives you time for the historic center and local food; Colca adds an early departure, altitude and longer road transfers.
A compact plan
With limited time, give Arequipa a short city stay and use a separate day for the Colca route if the transfer schedule works. This option is useful when you want the canyon as a strong addition without taking several days away from Machu Picchu and the Sacred Valley.
A calmer plan
With more flexibility, allow an extra night so you are not moving directly from a long transfer into another early morning. This creates room for weather changes, slower meals and a less compressed connection to Lima, Cusco or Puno.
What to confirm before booking
Confirm road transfer duration, hotel pickup area, the exact Colca route, meals and whether the next connection leaves from Arequipa or another city. A map can make the route look simple while the road time changes the whole day.
Connect it with Cusco carefully
If Cusco and Machu Picchu are the priority, do not place Colca immediately before the most demanding high-altitude excursion without checking your recovery time. Deicy can arrange a Peru route that protects the essential bookings first and adds Arequipa where it fits naturally.