Don't list all airlines, e.g. Southwest. Also fares sometimes appear more comparable than they are because some carriers (such as Spirit and Frontier) have additional charges, like luggage, which aren't mentioned.
On my second airbnb reservation my host cancelled. I learned that this is the hosts prerogative under their policies. Airbnb states that a refund to a credit card should take about 5 days. It took much longer: eight days until they documented my refund request and another eight days until it showed up as a refund on my credit card.