I am planning a trip to Europe in June and it seems like alot of holidays in the mediterranean are pretty cheap flying from London. Any suggestions for islands to visit with great beaches and great value? Best all-inclusives? There are so many great choices but I'm thinking Greece, Spain or Croatia.

Croatia is great value, and a much cleaner part of the Mediterranean. It's not on the euro and is thus still much cheaper than even Greece. Hvar island is a great spot to visit, and if you're ok with coastal mainland then Split and Dubrovnik are very much worth your time. For a more laid back experience amongst vineyards, try the island of Brac as well.

Croatia is amazing!
Dubrovnik is a very tourist place, but very rich in history and culture. Split is very beautiful as well.
Opatija has a beautiful beach.
Keeping in mind, I was there in 2003 and did not do all inclusive.
When I was there, Dubrovnik was by far the most expensive of them, but it's all relative. It would depend on the location of your hotel too. I don't remember a "beach" in Dubrovnik, but even if it's not your main destination, I highly recommend a visit.
As George Bernard Shaw said "those who seek paradise on Earth should come to Dubrovnik”,

There's a nice beach in Dubrovnik right beside the old town and more if you drive south toward Cavtat

icelandair is having a sale right now on flights to Europe April 1 - June 25. Can't comment on where to go once you get there. http://www.icelandair.ca/special-offer/...
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Special Offer | icelandair

Not an island, and I'm not sure about the prices now, but in the fall of 2014 we went to a seaside town called Tossa De Mar for a week - it's an hour north of Barcelona, which is easy and cheap to fly to. You can take a bus or rent a car from the airpot (we rented and the roads were great!) It was lovely! The town is built beside an old castle.. There is a beautiful beach if you want to relax, MANY hotels and b&b's to choose from and good restaurants. PM me if you need more details!

Nice France! Nice little place with a beautiful beach

Cool thanks guys! I have my flights booked already- got a great deal through westjet. Barcelona looks amazing so that might be an option. Croatia looks awesome too and cheap but less sandy beaches which i need/love.

Opatija, Croatia is a beautiful beach area.
http://www.beachesandsunsets.com/opatija-croatia.html
BEACHESANDSUNSETS.COM
Opatija Croatia

Dubrovnik walk the city walls. Or if your thinking of visiting an island, Santorini Greece

What is Santorini like for sandy beaches? Santorini is supposed to be a top-rated island

Santorini is not really known for their sandy beaches. If you can get past that it's a very nice island to visit.

I did go to a lovely beach there. Not carribean nice, but azure water, and soft sand, and a waiter bringing be beer, ice cream, a full menu of amazing Greek food. I absolutely loved Santorini. Beautiful views, and amazing food.

Naxos island is a great beach island.

Is Naxos expensive?

I didn't think so. Not more so than santorini.

I spent time in Mallorca Spain (island) and it was AMAZING.....Barcelona was also amazing and very easy to navigate. I went to Portugal Spain and Italy for 6 weeks this past sept/oct hoping to go back in May
I travelled solo staying in hostels it was a great adventure.

Portugal

Santorini is beautiful- thought to be the site for Atlantis:) small island so you can see lots of it - try renting a scooter

Love Italy...but know that you need to pay to go to Cinque Terre now I do believe.

You can go to Santa Margerita and take the train or go by boat

Or go via Le spezia

Katemavic group

Croatia is great, the coast, at least the part I've seen from Zadar to Dubrovnik is fantastic. Great beaches, perfect water, excellent nightlife. The island of Hvar is exceptional for all those things as well plus fun off road wine tours.