Manofman - The problem is the way in which the prices are displayed.
Using your example route with FR out Fri back Sun - price on the "flight" page of FR shows:
£12.99 out / £6.99 back (£19.98 total). plus tax and fees goes up to £64.53
Next page - add in 1 bag, with online check in - price now £94.53
Pay using VISA - price now £104.53
So, you have to go through 4 pages to get your final cost, which is a differance of £40 higher than that shown on page
Ahh Grounded, using the same peramiters as you used above i continued on the flybe website and with the 1 bag and the Visa fee thier price rose to £156.45...
Departing
Tue 16 Jun 2009 Depart 06:35 Arrive 09:10 Manchester (MAN) to Brussels (BRU) Fare 26.47 GBP Taxes and Charges 30.50 GBP Seats 0.00 GBP Bags 7.99 GBP Coming back
Thu 18 Jun 2009 Depart 18:50 Arrive 19:25 Brussels (BRU) to Manchester (MAN) Fare 46.47 GBP Taxes and Charges 30.03 GBP Seats 0.00 GBP Bags 7.99 GBP Insurance (inc. IPT tax) 0.00 GBP Car hire GBP Booking Fee 3.00GBP Credit Card Supplement 4.00GBP Discount funded by Loganair 0GBP Total so far (GBP 156.45)
Meanwhile the price on RYR for the same dates is now £56.00, making Flybe £100 more expensive, which i would of course spens on another 2 RYR flights !!!