Khloe has flown to Toronto to be by her ex-boyfriends' side.
The former couple were spotted together deplaning a private jet.
Sources say KK joined TT to provide comfort and support during such a difficult time.
You may recall, Khloe lost her father, Robert Kardashian Sr., when she was a young adult.
She took his death extremely hard.
Khloe and Tristan have not reconciled as a couple, but they do co-parent their two children.
TT has been spotted at family gatherings and parties.
The Good American co-founder has praised Tristan for his hands-on parenting, but can't say that for him being a faithful, monogamous partner.
In 2015, her ex-husband, Lamar Odom suffered a near fatal overdose and she rushed to be by his side then, and even aided him throughout his recovery.
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