The 42-year-old South African cancelled plans to fly directly to Ontario following his fourth major win and instead hired a helicopter to get him back to Wentworth in Surrey so he could celebrate with his family.
"A pretty crazy night, but in a good way obviously," Els said in his website diary.
"I'll be flying to Canada probably on Tuesday. I'm sure they'll understand.
"It's a tournament I wouldn't want to miss. Once I commit that's it. You follow through, whatever happens."
The tournament sponsors Royal Bank of Canada also back Els and he added: "They've been good to me and I want to give something back to them. It should be a great week."
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As for ending 10 years without a major, he added: "Wow, what a week. It's a crazy, crazy game - this was one of the greatest days of my career and one of the best rounds of my career.
"I said at the start of the tournament that I felt like something special might happen and it doesn't get more special than this. It's an amazing feeling.
"Obviously the putt on 18 was as sweet as they come, right into the heart of the cup.
"The crowd's reaction was incredible. They are the moments you dream about really."