Yes, travel protection covers flights and airfare as long as you include the cost of the flight(s) when you first purchase your Discovery plan. Your travel protection benefits can reimburse you up to a maximum amount if you experience a covered event.
The Multi-Trip Annual Plan has set amounts for Trip Cancellation and Trip Interruption; the cost of your airfare would be covered up to that amount (assuming you cancel or interrupt for a covered reason). Learn more about flight delay or cancellation insurance.