Are plane tickets when say, £27 for real?

instance, see on television easyjet extremely low prices £17.
looking @ flights , can board plane manchester dubrovnik, croatia £27 easyjet. can pay £27 1 way or there charges?
obviously, easyjet aren't known quality.

for instance, see on television easyjet extremely low prices £17. looking @ flights , can board plane manchester dubrovnik, croatia £27 easyjet. can pay £27 1 way or there charges? obviously, easyjet aren't...

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