Given that your flight departs at 11:32 AM, you should allow at least 2 hours for travel and check-in time at the airport. This means leaving the port no later than 9:30 AM. While it's certainly possible to make the flight with that amount of time, it's always safer to leave a little extra time in case of unexpected delays or traffic.
If you don't feel comfortable with the 9:30 AM departure time, I would recommend looking for a later flight or considering staying an extra night in Seattle and flying out the next morning.
