Airlines have been accused of hiking fares between Melbourne and Perth before this weekend's AFL preliminary finals.

Hawthorn and North Melbourne will head west to take on Fremantle and West Coast this Friday and Saturday.

Celebration: Lindsay Thomas lands a goal against the Sydney Swans as North Melbourne book a preliminary final berth. Credit:Getty Images

Fairfax radio station 3AW reports that the average price of a return flight between Melbourne and Perth has shot up to about $1200 ahead of the matches.

North Melbourne cheer squad president Annette Scott said watching the Roos in a preliminary final is something no fan would want to miss.