Cheap o air/ air europa
 

I am finding the best rates fro Florida to Europe on Cheap o air, flying Air Europa. Anyone used these before?

I believe you mean from MIAMI...go ahead, use them.

I have bought tickets through www.cheapoair.com which, despite its doubtful name, was efficient and easy to use. However, its offer to provide advance seat selection on my itinerary did not work. For that, go directly to whatever airline is involved.
It's been many years since I used Air Europa, so I can't offer advice other than to observe that the company is based in Spain. As with any on-line travel it is worth seeing if you can buy your ticket directly from the airline. https://en.wikipedia.org/wiki/Air_Europa

Before you do, search elliott.org for problems that have come up and how they were handled.

Thank you. Yes, I do mean Miami to Spain. I am actually just looking to find the best deal from Miami to Europe for my family of 4 in June. We are open to the destination at this point. I just want to be sure that I am booking through a reputable site. Any advice is greatly appreciated. Rome is our first choice. AJ, I will look up elliott that you suggested.

Got the same problem.
Want to book tickets to Benos Aires from Europe and Cheapoair/onetravel is about 1000 € cheaper for the 5 of us.
Problem is I have no confidence and found - of course - lots of horror stories.
And I just don't understand how they can be cheaper than booking direct with the airline so my guess is there is acatch that quite often doesn't impact travel but when it does, your holiday is screwed.
Nevertheless. 1000 €. Quite a sum. But some reviews say they had to pay 'hidden costs'.
Gotta discuss it with my wife and maybe a travelagent.