I booked a roundtrip flight on United, going to South America. My work schedule changed slightly and I can actually spend more time on the trip, which I'd like to do.
United would charge a $300 change fee for this flight, plus the difference between the original ticket and the (now) new ticket price, I'd end up paying something close to $400 to make the change.
Interestingly, I can book a one-way return ticket for $150 plus use some miles (only 20,000) on the day I'd prefer to return.
If I did this, I simply wouldn't show up for my initial return flight on the roundtrip itinerary, and would instead use the one way ticket to return a few days later. This would save me quite a bit of money. I don't expect a refund for the unused portion of the initial roundtrip fare.
I can't figure out if there's a downside this or if I'm going to cause some sort of problem?