We live in Edmonton, our first time to DisneyWorld (January '08), we flew United from Edmonton connecting through Chicago. We hated that flight, as there was NO ENTERTAINMENT for the whole flight!! With 2 teen boys that was a huge bummer on a 7.5hr flight!! Price was approximately $375.00/pp total...not bad.
Our second time to the world was just last September '09. This time I was smarter and booked us around December for a September flight. We flew AirCanada the whole way from Edmonton. Flew the red eye (12:20 am arriving in Toronto early AM and departing again around 10:00 am. ) Arrived in Orlando around 1:45pm. This was not a bad flight. Entertainment the whole way, all Canadian carrier....so much better! even flying at night everyone was so hyped up that we weren't overly tired. Flights for our family of 4 came to around $1,600.00
This upcoming trip, my son and I are going by ourselves. I have come to realize I hate transfers and I want to get there as easily and direct as possible! We have chosen to try West Jet's direct flight from Calgary (leaves on a Saturday at 9am and arrives in Orlando 5.5hrs later around 4:45 pm) no transfers, great airline...that's A+++ for us!!!

We fly out Sat. August 21 and fly home Sat. August 28th....the good thing about the return flight is it is at 5:45pm, so we get to enjoy much of our last afternoon at Universal before leaving to the airport to catch our flight.
As for pricing....I looked for a long time for this direct flight. For so long, it was never under $500.00 /pp . One day I randomly logged onto West Jet's site and saw these coveted, direct flights at $175.00/leg!!!! That's the lowest I've ever come across the tickets!! I grabbed them and our total with all taxes in was $900 ish for the 2 of us.
We are driving to Calgary and staying overnight at the Holiday Inn before flying out the next morning. We are making it part of the trip, so I don't mind travelling away from my home city for our flight this time!
I am so excited we managed to get West Jet direct flights at a decent price, as ever since I booked, I have NEVER seen the same flights less than double the price I paid!! One leg of that same flight is now over $300.00!!! So glad I jumped on it and booked when I saw it low!
Hope this helps. I think if you can find any flight from Alberta under $450.00 per person, then you are doing ok!
