Many fonts on Typekit support Portuguese. You can browse fonts that support Portuguese by selecting "Portuguese" from the list of supported languages in the sidebar under browse fonts.
All fonts that support Portuguese include (at minimum) the following letter characters:
| A | B | C | D | E | F | G | H |
| I | J | K | L | M | N | O | P |
| Q | R | S | T | U | V | W | X |
| Y | Z | a | b | c | d | e | f |
| g | h | i | j | k | l | m | n |
| o | p | q | r | s | t | u | v |
| w | x | y | z | À | Á | Â | Ã |
| Ç | É | Ê | Í | Ó | Ô | Õ | Ú |
| Ü | à | á | â | ã | ç | é | ê |
| í | ó | ô | õ | ú | ü |