So what will happen to your body during one of these longer flights? That’s due to the body not being able to absorb as much oxygen from the cabin air at altitude than it would on the ground. The good news is that most of these problems won’t necessarily be more pronounced on longer flights. Until then, if you’re taking a regular long-haul flight, the advice is relatively simple. And see a doctor immediately for any worrying symptoms after your flight, as blood clots can take hours or even days to form, grow and move along your veins.

Source: Stuff January 05, 2023 10:38 UTC