How did Harry Potter breathe on the Thestral journey to London?

Question

In Harry Potter and The Order of the Phoenix, Harry and his friends travel from Hogwarts to The Ministry of Magic in London to attempt to save Sirius Black from Lord Voldemort and to get there they use Thestrals. From a question here

How fast do Thestrals fly?

The rough estimate for speed for the journey is 200mph+. If we take this as being roughly correct, how did they manage to breath at this speed for a 2 hour or more journey? We know there was, for example, the bubble-head charm that could have possibly worked but it isn’t mentioned in the book nor shown in the movie. Has there been any mention elsewhere as to how it was done, e.g. Pottermore?

Answer 1

Wizards and witches are more resistant than normal people. They could fly on a broom without any problem flying on an animal are no more troublesome than a broom flight.

Also looking for fights in an open cabin I found this: Nieuport-Delage Sesquiplan

A flight with a speed of 200 mph and with a distance travelled more that the question so normal humans don't have any problems in these conditions.

Answer 2

I would like to answer with this: magic

Otherwise, we’d have to start asking how wizards can use sticks of wood to make objects fly around.

Although, I do want to theorise that Thestrals probably don’t travel at 200mph in the conventional sense. Mathematically, that is distance over time, yes. But it’s more likely that Thestrals warp space time rather that physically move super fast. This is purely theory.