Can you get a refund through ExpediA?

If Frontier cancels a flight or makes a major schedule change call at passengers are entitled to a full refund. However, if a passenger decides to cancel their flight, the cancellation will generally only apply if the flight is canceled after 24 hours and at least seven days before departure.

Source: https://support.google.com/business/thread/306636195?hl=de&sjid=4022282940561805388-NA