Originally Posted by
xliioper
If you were using multi-city search on Matrix, beware that it has bugs and will try to combine segments on a single fare if they meet the layover requirements (4 hours domestic, 24 hours international), but it does not correctly check for married segment inventory availability.
actually, UAs own site has this bug, where it doesn’t check married segment availability. It’s been going on for years. So sometimes searching XXX-YYY, it will find a flight connecting in ORD for say, $250, but searching multi-city XXX-ORD then ORD-YYY will be available for, say, $180, on the exact same flights. This is one reason I almost always search multi-city, the other being UAs site is buggy in that it will also often just not display perfectly legal and decent connections when searching XXX-YYY, and so if you want those options, mutli-city is the only way to book it.