How long do crashed UFOs stay?

[TentacleMayor]

How long do I have to clear one or bomb it? And if I don't, what happens?

[asd]

I think it's around a day... maybe a bit less than a day. If it's nighttime when you shoot it down, you can wait until morning to send in a squad. Just don't wait too much!
If you don't do anything, then it will disappear, but I'm not sure if it will damage your relations with the country the UFO crashed on.

[baddoggs]

there is only a minor diffrence between night and day.
attacking the smaller ships (corvette and down) is
still pretty easy at night so....
Don't be afraid of the dark.
Also if you airstrike the ones you dont intercept it
will do NO damage to the country it crashed in, quite
the opposite in fact.

[your.sheepy]

You have to start send a dropship within a day. As long as a dropship is enroute, the ufo won't disappear.

If you don't do anything, the country will air strike it on their own and not give you a dim. That's what I think anyway. As far as I know it won't hurt your relationship or funding, but it's better to strike them to get some cash.

[baddoggs]

agreed.