This may be a stupid question but I wanted to double check: recently I booked flights for myself and two friends from London Gatwick to Alicante with Monarch Airlines. They both have two last names which I hyphenated when I booked the flights, but I have now found out that their names are not hyphenated on their passports. As I am going to Spain, I have to give Advanced Passenger Information which must exactly match what is in our passports, and it won't allow me to change their surnames so that they are not hyphenated. Is this likely to be a problem? Name changes with Monarch flights can cost £100 each so I am not keen to phone them and give them an excuse to charge me £200!
Thanks in advance.