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How do you know when to daven Shachris on a plane?

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Just wondering: Why not when the sun is up? – yydl Dec 28 '10 at 2:53
First of all, there is a view that one must follow the zemanim at that location down below, where the sun may not yet be visible. Secondly, it is very difficult to determine when the latest times for Krias Shema and Tefilla occur. For a detailed discussion about this topic, see here: chaitables.com/… – Dave Dec 28 '10 at 3:18
up vote 9 down vote accepted


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Thanx, great resource – SimchasTorah Dec 28 '10 at 4:57
I wonder if somone could make an app of this that would be very worthwhile – SimchasTorah Dec 28 '10 at 5:43
very cool site! – Jeremy Dec 28 '10 at 14:38
@SimchasTorah - they do have a Windows-based program. It's surely only a matter of time until they port it to mobile devices. – Dave Dec 29 '10 at 2:52
I'll definetly have to remember this when I fly from Amsterdam to New York! – Barry Hammer Nov 29 '11 at 14:18

There's online zmanim for flight From MyZmanim.com


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Joe B, welcome to Mi Yodeya, and thanks very much for linking this resource! – Isaac Moses May 4 '15 at 17:46

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