Might be worth checking your inbox if you've previously used Edreams before. I received an email promotion from Edreams for a $110 flight voucher and a free 1 year trial of their premium membership Prime. (Pretty sure the prime membership is a waste of money for 99% of people)
Normally a prime membership is $99. The voucher requires you to spend at least $111. I couldn't find the a promo code text box on their website when trying to book, but was able to find it on their app, so you may need to install their app to use the discount.
I was a somewhat sceptical of the deal but I managed to snag some Bonza flights using the code.
I have used Edreams before and they will try to upsell a whole lot of useless stuff like SMS updates about your flight and charge an exuberant amount for baggage but it is okay just for absolute basics.
Please remember to cancel your Prime Membership after using the code as they won't allow the use of the code on an account with a cancelled prime membership.
You might explain WTF it is.