Perth Airport has taken Qantas to court to try and recoup more than $11 million it says the airline has refused to pay it to use its runways.

The airport said on Monday afternoon it had commenced action in the Western Australian Supreme Court to recover the unpaid aeronautical charges, which had amassed over the past six months.

Qantas' first non-stop Perth-to-London flight departing in March. Credit:Brent Winstone

Perth Airport's legal action is the latest development in an ugly spat with Qantas over the fees it charges for access to runways and other airport infrastructure.

The previous fee schedule expired on June 30, and with no new agreement reached, Perth Airport started charging Qantas and its subsiduaries Jetstar and QantasLink its proposed rates, which it said were a "significant price reduction".