Such a tease

We have a three-day weekend coming up next month (for "Whit Monday", which I don't really understand), and we'd really like to go out of town. We found an inexpensive flight to Barcelona on Travelocity, but whenever we try to book it online--either from home or from work--we get a system error message. Travelocity customer support insists there's not a problem and that they don't get an error when they do it (then why does it happen both at work and at home?!?). Meanwhile, the price is already getting higher on Travelocity, and the price is almost double on every other site we've checked. ARGH!

(I know, the empathy you must feel for poor us that we may not be able to find a cheap flight to Barcelona...)