Safer to fly first world than second or third. I would avoid any carrier out of Africa except South African Airways.
Stay away from Asian carriers and never middle east except El Al. European, OK UK, OK .
The big problem is that the carrier, say “Air Bangladeshi,” has a contract pilot that is virtually solo because the co-pilot is a “national” that only speaks the language and is an inexperienced pilot. The contract pilot may be a USAF or UAL trained Captain but his hands are full when solo.
MY son just flew Qatar-———loved it.
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Even Cathay Pacific?