Hi again,
Thank you very much for the help and sorry for the delay - we’ve just moved house so things have been crazy.
Thanks for the suggestions of the Evenflo Sureride and the Cosco Scenera however she’s over the weight limits for both seats.
Also, thanks for the advice about the lightweight seats – we’re not too concerned about the weight of the seat as we’re okay with carrying it (and if we really need to, we’ll buy one of the wheeled carry carts).
It definitely sounds like a dedicated “travel/flying seat” is the best option and thanks for suggesting the Radian. Unfortunately this isn’t an option for us as she’s 79lbs now and the weight limit of the Radian is 80lbs harnessed. However, the Rainier appears the same size – have you used the Rainier, or just the Radian? Also you mentioned the low-profile allows the tray table to come all the way down – are we understanding correctly that this is therefore not true with the Britax seats (Frontier or Pinnacle or any other seat)?
Sorry to ask more questions – we hugely appreciate any help!
Thanks very much again.