when looking for airfare for 2+ people, it's interesting to first check the fare for only 1 person...airlines only release a few seats at a time at the cheapest fares, so when doing a search for only 1 seat, you might find the last cheap seat available at that time...but when doing a search for 2 seats, instead of showing you the last remaining seat at the lower price + 1 seat at a higher price, the airline will show you both seats at the same higher price

when we booked our tix on AA a few months ago, i wound up buying the last ticket available at the cheapest price, then waiting a couple of days until they released more cheap seats to buy the other ticket...this saved us ~$260/ticket...we were buying 11 months out, and the flights were still pretty empty, so i was confident they would eventually release more cheap seats...the other thing we could have done if we didn't want to wait to buy the second ticket, is buy the one cheap seat, then separately purchase the other seat at the higher price...this would have at least saved us ~$260 on one ticket