Upvote:1
That's correct - the question about residence is merely for insurance, as the insurance cost has likely been calculated on the risk basis of Polish residents travelling from Poland, rather than (the many other) possibilities.
With regards to flying from Poland to the UK and back again, you'll have no problem in either country using a US passport. Although I'm a dual national (UK/USA) now, I used to travel frequently (5+ times per year) between London and Gdansk.
Upvote:3
I tried the Wizz Air site to test this, and Willeke's comment is spot on: the declaration about being resident in Poland only shows up if you select the optional Travel Insurance. If you are not resident in Poland, you should select "No Insurance" as you are not eligible for the Travel Insurance they are offering. When you select "No Insurance", Wizz Air won't require any declaration about being resident in Poland.
If you already bought the tickets with the insurance, I think you don't need to worry about it. Since the declaration was only for the insurance anyway, I believe it won't cause you any problem for boarding the flight, and certainly not for passport control. I believe it will only potentially cause the insurance to be invalid.