Last week the DOT sent the airlines a reminder that they must refund tickets when they cancel a flight or significantly change an itinerary. However, if you cancelled your flight then you wouldn’t be eligible for a refund unless you booked a non-refundable ticket. You would only be covered by the applicable airlines current waiver which seems to be the case.
I highly recommend, if at all possible, to wait until the very last minute (two or so hours before departure) to cancel a ticket, if the airline hasn’t already canceled. I have a flight on United in mid-May that I know I’m not taking but I won’t be cancelling my ticket anytime soon. I’m going to wait for them to cancel and then call them to get a refund.
edited because I can’t spell