That's too early. Way too early. It takes about 30 minutes to get to the airport and you need to arrive at least 90 minutes before your flight. That means you absolutely must be off the ship and in a cab by 8am. And then if all goes well with Friday morning rush hour traffic, you might be able to make it.
We live in Florida. When we sailed Alaska, we just stayed overnight after the cruise. It was much easier than booking the afternoon flight. We went to the hotel, dropped the luggage, did a little sightseeing, etc. It only added about $150 total to our trip.