Based on an option without check-in bag.
There are no taxes to pay and still many dates available.

Example:
Going Out: 12/08/2010 06:25hrs
London-Stansted - Oslo (Torp)
1 x Adult 7.00 GBP
Taxes/Fees 0.00 GBP
1 x Web Check in 5.00 GBP
Coming Back: 20/08/2010 17:05hrs
Oslo (Torp) - London-Stansted
1 x Adult 7.00 GBP
Taxes/Fees 0.00 GBP
1 x Web Check in 5.00 GBP

Total Cost 34.00 GBP (with MasteCard PrePaid £24)£24.00

www.ryanair.com