If the connections bother you then you should keep shopping, as you’ve got 10 months. Sign up for fare alerts it you haven’t already, and be ready to book when (if) you see a more direct, or even nonstop, routing for this trip.

I’ve never connected via Canada, but I believe you would just be in-transit, so would not have to clear border or customs there—except in cases of pre-clearance—but let’s keep it simple. You’ll either do US customs and border in Toronto, or at first point of entry to the US. Toronto does have US pre-clearance but I don’t know if that applies to all passengers connecting to the US or not.

My wife and I went through Toronto this past summer. I know we had to go through some kind of security both ways, but I can’t quite remember how big of a hassle it was. I’ll ask her what she remembers and report back.

FWIW, we have connected in Toronto and it was fine. We too had some sort of clearance, and our plane was late (Alitalia’s fault) but they hustled us through and we made the very next connection.
I gotta say, I really don’t like two connections if it is not absolutely necessary.
But I’ve done it before and probably will do it again if I have to.

Thanks for responding! So far the cheapest option would be to fly to London from Atlanta on Air Canada so if I end up with that route, I will definitely try to get one with enough connection time. Ideally I would like to fly Delta because they do have non-stop service and I would also get the miles but I will take the advice for signing up for the air fare alerts and hope for the best.

I think you should wait a few months before booking, $800 for a return isn’t too bad, but it could easily get a lot lower within a few months, especially with 2 stops. I already found a non-stop return Atlanta-Amsterdam in september 2011 for $840 with Delta or KLM.
Try kayak.com, orbitz.com. farecompare,com or just even delta.com or klm.com

I bet you’re not in a hurry, if so you can wait for few months to get a cheaper booking