We are a family of five and go for a fortnights hol in school hols we always find bargains on First Choice's web site. I even found one for a fortnight at easter for the five of us for 660 for a fortnight.
I look at all airports too not just my local one as one year we drove to gatwick from manchester and saved over a grand on the same hol from Manchester.
Also you can do different combos to check the prices such as 2A+3C, 3C+3A, 4A+2C, 5A+1C OR EVEN 6 ADULTS prices can vary on silly things like that.
We usually go on hols May/June 2 week whit hols (in my area coz they only get 5 in summer not 6)
in the brochure it is 2600 for all of us , but when we book late using the last minute part of their web site we pay around 1200-1400 depending where we go usually four/min three star self catering hotels/apartments.Sometimes that is with two rooms and not one as well.