Originally Posted by
mecabq
Thanks. I usually choose "Economy (Refundable)" these days, and indeed the itinerary e-mail says "Fare Rules Additional charges may apply for changes in addition to any fare rules listed. REFUNDABLE" I guess there are additional fare-rule restrictions with which I have to be consistent.
Refundable means that you can get your money back for an unused ticket. It
generally means that you can get money back for a partially-used ticket, after re-computing the cost to account for what you actually flew. It does not have any effect on how fares are combined together, though.
I only recommend refundable tickets if you think it’s likely you might not take the trip at all and if you wouldn’t otherwise have a use for the funds. If you’d be flying UA anyway, refundability is rarely worth paying for.