Just shoot if you have more meta search engines, here are mine:
www.google.com/flights/
http://www.kayak.com
http://www.momondo.com
alibabuy.com (web site in French), this link has been disabled by request from the site admin.
https://www.jetcost.ie
https://www.tripadvisor.fr
https://www.edreams.com/flights/
https://www.skyscanner.net 
https://www.expedia.fr

Note that might not always give the same results …

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