I booked a holiday to Tenerife and flew with Monarch. During the booking, Monarch was charging me for using my Debit card (around £13), although the description said this surcharge applies to credit cards, not debit cards. I was a little annoyed at first. And day before my flight during online check in Monarch again is charging for my seat ( I really think charging a seat is ridiculous! I really was worried the fact that since they charge such ridiculous thing so will I even get charged to use the oxygen onboard?) I remember clearly standard seat is £5.99 (one way) and £24.99 (one way) for a bigger leg room. None of these seating costs were mentioned anywhere right up until the online booking stage. I was lucky that I do not have many luggage, otherwise I would have to pay around £20 (one way) for a checked in luggage. I WILL NEVER USE MONARCH AGAIN! I strongly suggest to use BA or virgin atlantic, as these 2 companies have the best entertainment, staff etc.