Travel back to Canada via USA (LOs Angeles)

[Van355a]

Where going to travel to Asian country, and return back to Canada with connecting flight to Los Angeles,CA
So we have a 3hours waiting for the next flight to Toronto. Do we still need a transit visa or ESTA/ Electronic Travel authorization from Canada or US?

 

[Bs65]

If you have a visa waiver passport and an ESTA you a good to transit else see here https://travel.state.gov/content/visas/en/other/transit.html