Westward commercial flights that outpace the Earth's rotation

Westward commercial flights that outpace the Earth's rotation - Air Planes In Airport Tarmac

Are there any commercial flights flying west that outpace the rotation of the Earth? In other words, where the ending longitude is at least (15 degrees * flight duration in hours) west of the starting longitude. While on such a flight, you'd see the Sun going the "wrong" way.

I know such flights are possible at airliner speeds if you're far enough from the equator, but I don't know whether there's actually any cities far enough north with nonstop flights between them.



Best Answer

Inspired by Russell McMahon's answer to "Can I land in a different time zone before my take off time?".

The rotational velocity at a given latitude is about:

V_rot = 1500 x cos(latitude) km/h

Conversely, the latitude at which a given rotational velocity is attained can be found by:

latitude = arccos(speed/1500)

Most jets have a cruising speed between about 800 km/h (A320 family) to over 900 km/h (777). Not taking into account take-off/ascent/descent/landing, the latitude at which you go "faster than the Earth" at 900 km/h (if you travel parallel to... a parallel) is about 53°, which in the Northern hemisphere is about the middle of England, Northern Germany, or about the middle of the southern provinces of Canada. At 800 km/h, you have to reach nearly 58° (around Stockholm, or close to the limit between the southern and northern provinces of Canada).

There is one additional complication:

  • You need to travel along a parallel "or better" (along the great circle route), so any detours due to jet stream, weather or geopolitical issues will make things worse.
  • The jet-stream is most likely against you.

So in flight, at cruise altitude, if you manage to avoid the jet-stream, fly with a 270 heading in a 777 over Scandinavia, sure, you will go "faster than Earth" at least temporarily.

I haven't yet found a flight where it actually works from take-off to landing. I suspect it may be quite difficult due to the constraints above. I have tried HEL-OSL and HEL-KEF but neither work.

Edit

According to Flightaware, flight SU6290, GDX-SVO (Magadan to Moscow Sheremetyevo) using a 777, took 7h13 on 14/12/2021, for a longitude difference of 113°, which corresponds to a 7h32 time difference. So that flight landed before it took off using local solar time (it also landed before it took off in actual local time), but just barely.

However, during flight, especially the middle part when it was flying a 270 heading over Northern Siberia (somewhere around 70°N) at about 860 km/h, it was very definitely "going faster than the Earth" (over 300 km/h faster!).




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Why are westward flights slower than eastward flights?

The main reason for the difference in travel time is due to the jet stream. The jet stream is high altitude wind that blows from the west to the east across the globe. Airplanes fly into the jet stream at 30,000 feet and then travel with these winds. You can watch a Breakdown about the jet stream here.

Can you fly faster than the Earth rotates?

Traveling Eastward or Westward This concept is common for all flights traveling from any eastern direction to the west taking longer time compared two flights traveling from any western direction to the east.



Why Isn't It FASTER To Fly \




More answers regarding westward commercial flights that outpace the Earth's rotation

Answer 2

Beginning Summer 2022, Finnair will fly nonstop between Helsinki and Seattle, which are 147°16' apart in longitude, a time equivalent of 9 hours 49 minutes. The westbound flight has block time of 9 hours 45 minutes, departing Helsinki at 17:55 local time and arriving Seattle at 17:40. That covers 15°6' of longitude per hour. Of course, assuming it runs on schedule, the actual flying time would be even shorter.

This is not as impressive as KEF-ANC, but at least it's between larger cities...?

Answer 3

Practically all westward commercial flights from East Asia to central Europe will outpace the Earth's rotation for part of their flight. As these flights are against the jet stream, they tend to choose near-polar routes, flying over very northern latitudes, to decrease travel time. As other answers have already pointed out, a typical cruising speed in ideal conditions is faster than the 15°/h rotation of the Earth North of approximately 50~60 °N. Flying from Japan (Tokyo or Osaka) to Europe (typically Helsinki, although also London and Munich) regularly put me as far North as the Ob estuary in Siberia; using Google Maps that approximates to 70 °N. Even with unfavourable winds, that should give a speed faster than Earth's rotation.

If you take such a flight close to the winter solstice, you can view the sun setting and rising at awkward times and awkward directions while you are flying into and out of the polar night.

Answer 4

In 2018 I flew from England to Iceland in late May. Leaving England at sunset, the sun was resting on the horizon. When we landed in Iceland, the sun was noticeably higher. It was the first time I saw the sun "rise in the west."

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