Task: As I had planned to visit Canada for a couple of days, I searched for one-way flights to Canada airport on November 5 for 1 adult in the Expedia app.
Steps:
Open Expedia app
Click on flights option
Click on one-way option
Click on flying from textbox
Enter text as London
Click on first recent search
Enter text as Canada
Click on first recent search
Click on November 4 
Click on done option
Click on search option