Flying with babies... How young?

I've just found out my sister's pregnant, which is absolutely delightful. However, she's due 2 and a half weeks before my wedding, and she lives a 3 hour flight away in Sydney. She's still planning to come to the wedding, bubs in tow. Does anyone have any idea if this is ok? I'm so worried she won't be able to make it, but of course I wouldn't want to put her or her baby's health at risk.

Fingers crossed she doesnt go overdue!

Josh's first flight was at 3 or 4 weeks old and he slept the whole flight (was only Invercargill to Chch which is an hour) The most stressful part was packing cos first time mum and all i thought i needed everything!!! I think the hardest part will be getting the passport that soon tho for an international flight

Thanks for everyone's advice! What a helpful forum - if I was anywhere near TTC I think I'd be here every day She won't go far overdue because she's already signed up for a fancy private hospital that doesn't let you go too far overdue. I do agree that a passport will be difficult, though - she'll need to know the birth date before applying for one!

International I think it is 3 months is the earliest they can fly (but it is different with different airlines). I would have a look at the different airlines and see what theysay.

I flew at 7 days old in 1981 from OZ to NZ, but that was back in the day when I could fly on my mum's passport.

Elise had her first flight at 6days old, from Christchurch to Auckland & my MW told me to lie about her age as they don't like babies under 2wks flying. But may be different for international. Agree with others, contact the airlines directly & ask how old a baby has to be before they can fly

We flew to Oz when Rico was just 4 weeks and only cos of DH's dying grandfather.  I asked my MW and she didn't blink an eyelid - said it would be fine.  So Rico's first passport photo was of him at 3 weeks old!  Being that we were flying out so quickly the passport was done in just a day or two.