Are there any airline companies that let children aged 13 fly alone on an international flight?

Are there any airline companies that let children aged 13 fly alone on an international flight?

Yes children can fly alone with a parent

Most major airlines will allow this at that age. The child will be required to use Unaccompanied Minor service, which involves an extra fee and additional paperwork, as well as a designated individual to meet the child at the destination. That individual will have to show ID. The details of each airline's policy is on its website.

Each airline sets its own rules on unaccompanied minors policy, British Airways have recently changed to only 14 and above, but other airline may still accept those 12 and above or lower if the offer an UOM service. Check the airline's website for their policy.

My Daughter used to Fly British Airways at 13. They were superb, a Hostess sat with her and stayed with her from check in to meeting relatives in the arrivals lounge and didn't charge us a penny extra.

You will need permission from your parents, but you can fly on an international flight. School groups do this type of thing all the time.

YES on the plane many allow this. That is the easy part
A child does not get to wander the world at will.
You will need an Adult to board the plane and an Adult to greet you at destination.

Yes - most will, with parental consent, and in accordance with their unaccompanied minors programmes.

Look at where you're flying to/from, what airlines fly the route, then the available options.

The actual FLYING is the easy part. A child of five can sit on a plane unaccompanied for a few hours in perfect safety and comfort.
What a 13-year-old can't do is acquire her own passport, buy her air ticket, get a visa if one is necessary and give herself permission to leave the country unaccompanied.