Kind of unrelated to the original topic, but I didn't want to clutter the board with another thread (and anyway it's related to going to Israel...)

If one is traveling on a long flight (12hours or more), and will be passing several timezones, what is the protocol for prayer? For example, if the plane takes off at 8am local time, but as the plane flies, it passes through timezones and the time is moved a few hours forward, does one continue the Shacharis even if it's past halachic midday?

Alternatively, in a 20 hour flight, if the time were to move backwards, do you say Shacharis twice or go on to Mincha based off the timezone of the country of departure (even if it may be morning wherever you're flying over)?

עָתִיד הַקָּדוֹשׁ בָּרוּךְ הוּא לַעֲשׂוֹת מָחוֹל לַצַּדִּיקִים, וְהוּא יוֹשֵׁב בֵּינֵיהֶם בְּגַן עֵדֶן; וְכָל אֶחָד וְאֶחָד מַרְאֶה בְּאֶצְבָּעוֹ זֶה ה' קִוִּינוּ לוֹ, הִנֵּה אֶלֺקֵינוּ זֶה; קִוִּנוּ לוֹ וְיוֹשִׁיעֵנוּ