Originally Posted by
RobOnLI
I don't think UA will ticket it if you don't. So you may be getting to the payment page but once you click "purchase" you will get an error because UA will reject it. Otherwise, if it does ticket then you have 24 hours to cancel without penalty. Might be worth trying to see if it will even ticket?
If UA can price it, they can (and will) sell it. I’ve bought flights on United.com with no UA segments — in fact, in markets UA didn’t serve, they used to be commonly available before UA decided to ditch them.
Although you may sometimes get an error on ticketing, that’s not because United.com cares about the flight numbers; it’s more likely because they were unable to revalidate available inventory.