Does anyone know how impacted SEA is by the TSA situation? I realise it will vary by day and time of day, just trying to understand if it is one of the hotspots. Actually going to be flying BA to LHR rather than AA, don't have TSA Pre and will only have carry-on.

My flight will be at 13:25 on a Thursday, I was hoping to reach SEA around 11:30 and be ok, is that optimistic? Been checking the TSA app and it hasn't looked too bad (mostly under 30 mins), will also try MiFlights based on this thread. Many trips in/out/around the US, but I've never flown out of SEA before, so don't have any previous experience to draw on.

Thanks for any indications.