My girlfriend and I are living in Vancouver (BC, Canada). We have the project to directly go to the airport and buy the next cheap round-trip (return) flight ticket to go to any (relatively close) airport for a short week (4 days for example).
Does it seem to be a good idea? Will we likely get some very interesting prices by booking a return ticket so soon (maybe 30 minutes or an hour only) before the departure? We would not be bothered at waiting for 15 hours at the airport in order to get a good deal.
Here is a related post that asks about pricing when booking a flight 1-2 days before the departure and not 1 or 2 hours before the departure and did not address the round-trip issue.