Your husband is being a double whammy thoughtless idiot.
Failing to understand and empathise with his wife's greatest fear.
And then going ahead and booking a thing that taps directly into it.
A phobia is not rational. They can be treated, by professionals - but forcing/coercing/guilt-tripping the sufferer into an experience that overwhelmingly brings it up where you can't even get away from it?
Dick move.
Do you have anyone who can stand by you? Parents, siblings, in-laws, friends? Anyone who'll help provide a chorus of voices telling him he's fucked up and needs to rethink this 'treat' and turn it into something you'll like?
Failing this, you shouldn't have to but you'll need to keep saying a calm clear 'no, I will not be getting into that basket. Enjoy your flight. I'll be ...' whatever lovely option is available.
Be prepared for sulking, stropping, toys out of pram. Stay strong. 'I would have preferred something we'd both enjoy and could do together. As I say, the answer is no'.
'But -'
'No.'
He cannot actually force you into the basket.