It is quite common to see posts by students like yours BREJFK, asking for people to do a survey in relation to a thesis etc. I have no objection to that at all.
But perhaps you can tell me why it is that so many of them are surveys of something to which the answer is already quite clear to anyone with common sense and can see the world as it exists.
Customer loyalty in the North Atlantic market basically does not exist. Any kind of customer loyalty towards airlines has not existed for decades. The only 'apparent' loyalty you will find is by people who are collecting 'mileage points' etc. But even that is not a true case of 'loyalty'. You would first have to define 'loyalty' very loosely indeed.
Otherwise, the only 'loyalty' you will find for the majority of people have is to the lowest priced ticket, not to any particular airline.
Having wrote the above, I then went on to look at your survey. It did not impress me as having anything to do with establishing loyalty at all unless loyalty only meant using an airline frequent flyer program. That's hilarious. Your survey is beyond flawed if you think it is going to tell you anything about customer loyalty to an airline. It's simply about FF programs, who uses them and why. That certainly does not match up with the title you give of , Customer loyalty in the north Atlantic aviation market. In fact, I have a problem seeing any useful information your survey would provide to anyone other than question 16 which might be of interest to an airline planning a FF program. But then, the answers there have been figured out long ago and no need for anyone to ask them again.