Why is there 3 hrs difference (shorter)  flying time from Taipei to S.F than it's from S.F to Taipei?
94244
The westerly winds blowing from the high pressure zones in the Far East to the west coast of the United States is responsible  for the shorter trip from Taipei to San Francisco. In reality, though, when factoring in time zones, your trip is 19 hours shorter! You end up getting back into San Francisco before you left!
273794
Currents and trade winds affect air travel significantly. They  can change the duration of a flight as much as an hour or more, and are routinely taken into consideration when planning flight routes.
543147
If anything it changes to 1:00, since the number of daylight hours before noon is less than the number of daylight hours after noon.  It is never actually at the top of the earth; it's just at its highest point in the sky.
519273
Eastern time (US & Canada) is GMT -05.00 meanwhile India (Chenai, Kolkata, Mumbai, New Delhi) is GMt +05.30, so the time diffrence is 10 hours 30 minute, whith the time in India is forward
133822
"On the average, in the northern hemisphere, travel time flying east is less than travel time flying west as in the northern hemisphere the prevailing winds are to the east.\nThe rotation of the earth has no measurable influence on duration of flight. The atmosphere rotates with the Earth, and the aircraft moves with the air.  If we were to ignore the winds, no matter which direction you flew, the speed of the aircraft relative to the Earth would be the same. Airlines do try and make use of the jet streams wherever possible."
395699
Travelling east or west across several time zones at high speed causes jet lag.\n \n* Jet lag is a temporary disruption of normal circadian rhythm caused by high-speed travel across several time zones typically in a jet aircraft, resulting in fatigue and varied constitutional symptoms.\n\n* The maximum jet lag a person can experience is 12 hours. If the difference in time between two places is greater than 12 hours, subtract that number from 24. For example, there is a 16 hour time difference between Los Angeles (standard time) and Hong Kong. Thus, 24 − 16 = 8 hours of jet lag. The person will incur the same amount of jet lag as someone traveling between London and Los Angeles, where the actual time difference is 8 hours. Disregard the difference in date if flying across the International Date Line.\n\n* The condition is not linked to the length of flight, but to the transmeridian (ie, East-West) distance traveled. Hence a ten hour flight between Oslo and Johannesburg is less inducive of jet lag than a five hour flight between New York and Los Angeles. There is no firm agreement as to which direction of travel is worse. Some believe that travelling east is worse as it "accelerates" the passage through various time zones (a night might only last 3 hours when flying east), and because the symptoms of travelling west, such as waking earlier in the morning, can be easier to integrate with ordinary life. Others counter that the impact is worse when one travels away from one's "habitual" time zone, and is minimised when returning to it.
773678
NO, because the time zones and the International Date Line don't line up. When Kiribati became independent of th UK, it made the Date Line go around the east end of the country, so that all of their islands would be on the same side of the Date Line. This means that there are more than 24 hourly time zones, so there are moments when there are parts of 3 days going on. If you had a fast plane, you could depart from Kiribati's Line Islands just after midnight Sunday morning, arrive somwhere further west like Jarvis Island just before midnight Friday evening, and have your Saturday all over again!
675137
Four hours after you left (assuming you spent no time at your destination), and yet you were travelling back toward home at 2am Sunday morning in the spring when the country goes on "daylight savings time."\n\nIf that's the wrong answer, your informatio for answering the question was incomplete.
1155980
im not sure but it was three hours long
740211
Japan is GMT +9 and Arizona is GMT -7. Add on 7 hours to get GMT and then add on the extra 9 hours and so you get 4 AM the following day.\n\nHope this helps,\n\nSupreme One
159305
2 hours. AZ time always confuses me.
250533
11:30pm, April 30th\n\nWake Island is located in The Hawaiian Standard Time.  Honolulu is -10hr GMT.  \n\nLondon is 0hr GMT\n\nHawaii does not observe daylight saving.  \nOn the other hand, London, UK does! so that takes place in April and therefore London has already gone up by one hr.\n\nThis makes Hawaii fall 11 hrs behind London, UK...\n\nand voila, while London is @ 10:30am on May 1st, Wake Island is 11:30pm on April 30th.\n\nanddddd ... at that time it is 5:30am on the North American Eastern Seaboard (homeeee :>:>)
926299
Actually there is a nine-hour time difference between France and California, not eight hours as "thepenismightier" has suggested.\nYikes, I got a `thumbs down' for a correct answer!
811631
They pass each other at 2:20pm.\n\nOne way to figure this out is by considering the problem on an x-y graph:\n  Think of the x-axis as elapsed time, in hours.  So for example, x=1 would be 1 elapsed hour (or 1:00pm).\n  Think of the y-axis as position, in kilometers.  So think of Austin as being y=0, and Los Angeles as y=2100.\n\nThen, consider the trip of the two planes as two lines (ie. y=mx+b) on this graph.  In the end, youll use these lines to solve the problem.\n\nOk... so the plane that starts in Austin would be y=500x.  The reason we know this is because:\n   1)  at noon (x=0), the plane is in Austin (y=0).\n   2)  if you look at the way we set up the graph, the speed of the plane happens to be the slope of the line (notice "km/hr" = y/x), so the slope is 500.\n\nThe plane that starts in LA is slightly more complicated.  Its y=(-700x)+2800.  We know this because:\n   1)  at 1PM (x=1), the plane is in LA (y=2100)\n   2)  its speed is 700km (but in the opposite direction), so its slope is -700.\n\nSo, we're looking for when the two planes intersect... They intersect when their positions (their y values) are equal.  So you just need to solve the two equations with their y=values as being equal.\n\ny = 500x\ny = (-700x)+2800\n\n500x = (-700x)+2800\nx = 7/3\n\nOk so x = 7/3... Remember that x is elapsed hours, so 7/3 = 2 1/3 elapsed hours = 2 hours and 20 minutes....  or 2:20PM!\n\nYou can verify this by plugging x=7/3 into both of the equations.   You'll get y=1166.667, which puts the planes right around New Mexico =).
802160
Well you need a difference of two hours.  80 miles = 4 hours at 20 miles an hour and two hours at 40 miles an hour.  \n\n20 if the plane gets in at 8 and she leaves at 5 if she goes 20 miles an hour she will get there at 9 an hour late.  If she goes 40 miles an hour she get there at 7 an hour early!
555008
we always take sydney as comparison, if i'm not mistaken, is 3 hours ahead of malaysia. check out the attached link, you will find out more details.. :>
378732
how about the airlines?\n\n911 was the perfect example.\n\n2 planes leaving Boston 30Min's apart going to the same LA airport and both plans had a half a load.