Would you let 17-y-o son go on overseas trip alone with his girlfriend?

[Golgo13]

17 year old son has been making plans for the summer holidays, after Lower Sixth [year 12] and before Upper Sixth [year 13].
What started as a trip to France or Italy "with some mates" has become "just with girlfriend" - and he's asking for us to help out with costs.
The girl's mum has apparently given it the green light [I can check this] but wife and I are not comfortable with it.
He'll be 18 in November, so we might be being unreasonably pessimistic about his ability to take care of himself, but something doesn't feel right about letting an under-18 go off with under-18 girlfriend on an overseas trip...it's too much too soon
Compromise might be "if you can fund it, we won't stop you, because you'll be 18 within 3 months of the trip, but don't expect us to subsidise this"

I'd worry that with just the two of them if they have a lover's quarrel they will each be left alone and upset in a foreign country. Admittedly I'd be more concerned about this possibility if I was the girl's parents.

A holiday with mates would actually concern me much less, contrary to other poster's reactions. Possibly says more about my own teenage years than anything else!

What exactly are you concerned about? Seems a non issue to me.

I wouldn't like my daughter going abroad at 17, but don't know if you can stop it, i certainly wouldn't be funding it.

They would be fine and have a great time.
Are you worried that it would bring them closer together, and that would cramp his style if they then go off to different unis? (that was my parent's notional justification for cracking down on 6th form partner trips but being fine once I'd actually arrived at uni at 17).

If you are unable or unwilling to pay fair enough but how does one even give or refuse permission for a 17 year old to go on holiday?

Good luck with them finding accommodation at their ages. DS and his friends gave up trying to book anywhere last year as no where would take a group of 17 yr old lads.
They are going interailing this year, at 18 it is a lot easier.

“I wouldn't like my daughter going abroad at 17”

What-going abroad at all?

I think I would. Let him go and let this be an experience what life outside school is going to be. Don't pay for it though- he's asking to be treated like an adult so let him pay for the trip like an adult!

He may well not even be seeing her in the summer. I wouldn't pay towards it but when he was leaving I'd give him some spending money then.

I know sex is legal under 18 but I wouldn't let my kids have a boy/girlfriend to stay in their rooms all night until they went to university.

When I was 17 I spent a month inter railing across Europe with a female friend (also 17). It was fab.

Even in my thirties I'd have thought booking a holiday months in advance with someone I'd only been seeing for four months was ambitious, let alone at 17.