Affiliate Marketing Secrets

I am currently in the process of designing a travel website as i don’t have the ATOL or IATA license i will need to use an affiliate is there any good affiliates out there where for example if there giving flight tickets to sell at £100 and i sell them for £110 i keep that £10 profit?
I have had a look at expedia and lastminute.com but they only deal with commission rates

I am thinking about setting up a travel website which offers website visitors information on various locations around the world but I am skeptical about the idea as any affiliate earnings will only come through during the summer right? By the time I have actually created the site, summer 2011 will be over so I will have to wait until next year to see any real results. Am I right in thinking this?