My locale used to have you come in on day one, for which you got a jury timecard, and then go bck to work but be "on call" for the rest of the week. I told them them I either needed a time card for the the whole week (airlines tend to want those) or be released after the first day since I couldn't be on a trip and "on call" for the court. They hemmed and hawwed and finally released me. This went on for several years (yes I get called every year like clockwork, probably because I actually show up), before they changed to a "one day or one jury policy".

Most jurisdictions will have hardship policies, especially for long trials, ie if the loss of income will put your home in foreclosure they won't make you do a four-month trial. But that usually doesn't apply to a week or two, especially if your employer pays you (most airlines do these days).