(Sorry if this seems long winded...I love going to DL and SoCal) After many yearly trips to WDW I decided to make a trip to CA and Disneyland during their 60th anniversary celebration(2015, I went in 2016)...and now I haven’t been back to WDW, yet I have 4 trips to DL under my belt!
To me, 3 days is good if you can park hop...but you might want 4 or 5, it depends. If you like going on your favourite rides multiple times, taking the time to look at the little details and taking in the atmosphere, going in to all the shops and taking your time... then you might want 4 days. 5 to me seems like too much, but I’ve been there before. You know yourself best...and if this is a one and done trip, maybe you’d want a longer visit to see every detail and do everything.
Another thing to keep in mind is how close Anaheim is to beaches! Before my first trip I did some researching and chose to go to Huntington Beach for a day in the middle of my trip to break up my 5 DL days and I LOVED it! ❤ I absolutely fell in love with that beach! My next trip I took 2 beach days with 4 Disneyland days...and my next 2 trips I stayed at the beach and only went to Disneyland for 1 day! (Don't get me wrong, I love it)
As someone else mentioned, Ontario to California is a long flight. If you fly into John Wayne, the drive to Anaheim is shorter and quicker, and the airport is smaller and less chaotic. For me the only drawback is flights from Ontario to John Wayne are always connecting flights, which makes your travel time very long...7, 8, 9 hours. I like flying into LAX because I can get a direct flight and it’s often cheaper(at least out of Toronto it is). Depending on what time of day you arrive/depart, the drive to Anaheim and LAX can be quick- 30 to 40 minutes, unless you catch rush hours, then traffic can be crazy. I don’t drive, so I take Uber from place to place. It’s quick and I don’t find it too costly..just so convenient if you budget for it.