Chelsea
I do not know the average for matchday but for a mid season, season ticket (so half a year) the average price was around £700.
There was no English Premier League competition in 1916.
There was no English Premier League competition in 1917.
There was no English Premier League competition in 1918.
There was no English Premier League competition in 1919.
There was no English Premier League competition in 1940.
There was no English Premier League competition in 1941.
There was no English Premier League competition in 1942.
There was no English Premier League competition in 1943.
There was no English Premier League competition in 1944.
There was no English Premier League competition in 1945.