这是使用Python language Selenium bindings制作的工作代码.这个想法是：

>实例化WebDriver(在此示例中使用Firefox(),但也有其他选择)
>最大化浏览器窗口
>导航到URL(http://www.jet2.com)
>等到明确加载页面(docs)
>填写出发地和目的地
>单击“离开”字段以触发要显示的日历
>在日历中,找到当前日期 – 它具有ui-datepicker-current-day类
>使用“by XPath”定位技术和following axis检查本月是否有可用日期.如果是,请将其打印出来并单击.
>如果我们在本月没有找到下一个可用日期,请初始化并“无限”循环,然后单击“下一步”月份按钮,检查我们是否有可用日期.将其打印出来然后单击(如果找到)并退出循环.否则,单击“下一步”按钮.
>如果我们没有“下一步”按钮 – 那么我们在一年结束时,选择下一年的下拉菜单,继续循环
>完成后关闭驱动程序

代码：

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver import ActionChains
from selenium.webdriver.common.by import By
from selenium.webdriver.support.select import Select
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC


FROM = "Leeds Bradford"
TO = "Budapest BUD"

driver = webdriver.Firefox()  # or,webdriver.Chrome(),or webdriver.PhantomJS() or etc.
driver.maximize_window()
driver.get("http://www.jet2.com")

wait = WebDriverWait(driver,10)
actions = ActionChains(driver)

# wait for the page to load
wait.until(EC.presence_of_element_located((By.ID,"departure-airport-input")))

# fill out the form
driver.find_element_by_id("departure-airport-input").send_keys(FROM)
wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,"#ui-id-1 .ui-menu-item"))).click()

driver.find_element_by_id("destination-airport-input").send_keys(TO)
wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,"#ui-id-2 .ui-menu-item"))).click()

# select date
datepicker = driver.find_element_by_id("departure-date-selector")
actions.move_to_element(datepicker).click().perform()

# find the calendar,month and year picker and the current date
calendar = driver.find_element_by_id("departureDateContainer")
month_picker = Select(calendar.find_element_by_class_name("ui-datepicker-month"))
year_picker = Select(calendar.find_element_by_class_name("ui-datepicker-year"))
current_date = calendar.find_element_by_class_name("ui-datepicker-current-day")

# printing out current date
month = month_picker.first_selected_option.text
year = year_picker.first_selected_option.text
print("Current date: {day} {month} {year}".format(day=current_date.text,month=month,year=year))

try:
    # see if we have an available date in this month
    next_available_date = current_date.find_element_by_xpath("following::td[@data-handler='selectDay' and ancestor::div/@id='departureDateContainer']")
    print("Found an available date: {day} {month} {year}".format(day=next_available_date.text,year=year))
    next_available_date.click()
except NoSuchElementException:
    # looping over until the next available date found
    while True:
        # click next,if not found,select the next year
        try:
            calendar.find_element_by_class_name("ui-datepicker-next").click()
        except NoSuchElementException:
            # select next year
            year = Select(calendar.find_element_by_class_name("ui-datepicker-year"))
            year.select_by_visible_text(str(int(year.first_selected_option.text) + 1))

        # reporting current processed month and year
        month = Select(calendar.find_element_by_class_name("ui-datepicker-month")).first_selected_option.text
        year = Select(calendar.find_element_by_class_name("ui-datepicker-year")).first_selected_option.text
        print("Processing {month} {year}".format(month=month,year=year))

        try:
            next_available_date = calendar.find_element_by_xpath(".//td[@data-handler='selectDay']")
            print("Found an available date: {day} {month} {year}".format(day=next_available_date.text,year=year))
            next_available_date.click()
            break
        except NoSuchElementException:
            continue

driver.close()

检测结果：

>利兹布拉德福德 – >安塔利亚AYT(下一个4月可用日期)：

Current date: 28 Mar 2016
Processing Apr 2016
Found an available date: 4 Apr 2016

>利兹布拉德福德 – > Budapest BUD(下一个可用日期与当前日期相同)：

Current date: 12 Feb 2016
Found an available date: 15 Feb 2016

>？ (下一年的下一个可用日期)