这是可行的：

WebElement leavingFrom = driver.findElement(By.xpath("//*[@id='fromcity_chzn']/a"));
    WebElement goingTo = driver.findElement(By.xpath("//*[@id='tocity_chzn']/a"));

    leavingFrom.click();
    leavingFrom.sendKeys("Bangalore");
    leavingFrom.sendKeys(Keys.RETURN);

    goingTo.click();
    goingTo.sendKeys("Goa");
    goingTo.sendKeys(Keys.RETURN);

以下是工作示例：

//First get main dropDowns
var leavingFromDropDown = driver.FindElement(By.Css("#fromcity_chzn"));
var goingToDropDown = driver.FindElement(By.Css("#tocity_chzn"));

//Select value from first dropDown using dropDown items index
//First click on dropDown to open it
leavingFromDropDown.click();
//Now find items in it and click on any item using it's index (also can be used method to access this elements using their names
leavingFromDropDown.FindElements(By.Css(".active-result"))[1].click();
//this dropDown closes automatically, but if not you need to click on it again to close

//Same perform with second element
goingToDropDown.click();
goingToDropDown.FindElements(By.Css(".active-result"))[2].click();

如果您想使用输入框输入下拉列表中的任何值，您需要找到该元素并使用sendKeys设置其值。

leavingFromDropDown.click();
var input = leavingFromDropDown.FindElement(By.Css(".chzn-search > input"));
input.sendKeys('Goa');
input.sendKeys(Keys.Enter);//or tab