[phantom784]

Airlines generally won't let you board unless you have the necessary documents to enter the destination country (e.g. a valid passport, a visa if required). In fact, countries will fine airlines for bringing passengers without the correct documents.

[guard-of-terra]

As far as my experience goes, the only thing that gets checked in russian airport (for resident) is your passport. Passport control doesn't know where you are heading nor they care, nobody else checks it.

Maybe this is different matter for some flights (for example, to Israel or the USA), where the airline does additional checks on you, but you fly out to Europe and most other destinations unchecked (despite needing a visa to enter).

[grecy]

..and if your passport doesn't let you into country X, the airline won't let you board.

i.e. Russians need a visa to enter country X, you don't have one.

[guard-of-terra]

I don't recall airlines checking passenger visas. Either they don't or I'm not observant enough.

[grecy]

They check your passport, and they know if holders of passport from country X need a visa for country Y.

I've traveled quite a lot, and I'm always asked if I have authorization to enter the country I'm flying to.

[guard-of-terra]

I've travelled quite a bit (including Russia -> EU), and I've never been asked that.

Maybe they do a fast peek at your passport when letting you to board in the very end, but they can only check if some visa is physically there, since it takes them around 5 sec.