How can look data about 1 month ago flight, for example United 952, April 3 ?
Click on it in the Activity Log. 
You can either click on the activity log or you may search the history of flights between the origin city and the Destination city.
`Good luck 
you may search the history of flights between the origin city and the Destination city.
This appears to work only if there are scheduled or enroute flights between the airports.
The flight finder will show all arrivals from the past 24 hours even if there aren’t currently any flights en route or planned.