Originally Posted by
formeraa
The only downside would be if you had to change your reservations unexpectedly. If the fares are restricted, you could end up with two change fees because technically they are two separate reservations.
given that many domestic one-way fares are <$150, it still makes sense on most occasions to book separate one-ways and throw away the ticket if plans change. in that case, you also wouldn't be stuck with UA if you're trying to find a replacement flight on relatively short notice.