Outbound is only $5.60, but return adds up to $222.13. Thank the UK gov't, which accounts for $203.90 of the fees on the return. Not AS's fault.

United Kingdom Air Passenger Duty APD
$136.10
United Kingdom Passenger Service Charge Departures
$67.80
US APHIS user fee
$3.84
US Customs user fee
$7.39
US Immigration user fee
$7.00
US Sept. 11 security fee (outbound)
$5.60