I booked one to Alaska for £320. It's not often that you can get there so cheaply. I will use it for Northern Lights trip. I will survive ... I flew Y before so I'm sure I can do this again.
For people looking for cheap flights, £300 to Alaska or Hawaii is excellent fare.
I think fare is gone now. I printed the website with published prices and promo info. If it's cancelled, that's fine, I won't cry.