btfarrwm
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Posts: 95
Joined: Fri May 06, 2011 5:50 am

Question about flying between antipodes...

Fri Jan 17, 2020 1:20 pm

When flying long-haul between two cities that are very close to antipodes in orientation (ie. New York to Sydney or Mexico to India), would flight plans fly both legs in the same direction (ie. always flying East) to take advantage of the earth's rotation and prevailing winds?
 
32andBelow
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Joined: Mon Sep 03, 2012 2:54 am

Re: Question about flying between antipodes...

Fri Jan 17, 2020 1:43 pm

Absolutely if it makes sense. SIA22 comes over Alaska everyday but I’ve never seen the return come through.
 
gloom
Posts: 391
Joined: Thu Jun 30, 2016 4:24 pm

Re: Question about flying between antipodes...

Fri Jan 17, 2020 2:52 pm

Yeah, SIA21/22 would most often (if not always) fly eastbound, to use winds. I don't know any other flights long enough to make this a rule, though. It's the only one, I believe.

Some similar routing would be polar instead of west-east, but it's not exactly what you asked for. Or quite opposite, to be true.

Cheers,
Adam
 
sciing
Posts: 205
Joined: Tue Feb 03, 2015 9:54 am

Re: Question about flying between antipodes...

Fri Jan 17, 2020 10:12 pm

DEL-SFO-DEL by Air India or United is also mostly eastbound. SFO-DEL usually only slightly eastbound passing the north pole.
 
tealnz
Posts: 629
Joined: Mon Nov 09, 2015 10:47 am

Re: Question about flying between antipodes...

Wed Jan 22, 2020 2:47 am

Leeham quoted Qantas sources as saying QF would use an eastbound polar routing (roughly over Anchorage) for the Project Sunrise SYD-LHR route to take advantage of tailwinds, with LHR-SYD likewise flying eastbound.
 
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Francoflier
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Re: Question about flying between antipodes...

Wed Jan 22, 2020 4:00 am

All flights from Southeast Asia to the West coast US fly over the North Pacific going Eastbound to get pushed by the jetstreams and some of them, especially in the winter, depart north-eastbound to come back on a polar route that keeps them 'right' of the North Pole, technically making them round-the-World eastbound trips.
I'll do my own airline. With Blackjack. And hookers. In fact, forget the airline.
 
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Starlionblue
Posts: 19633
Joined: Fri Feb 27, 2004 9:54 pm

Re: Question about flying between antipodes...

Thu Jan 23, 2020 1:36 am

Francoflier wrote:
All flights from Southeast Asia to the West coast US fly over the North Pacific going Eastbound to get pushed by the jetstreams and some of them, especially in the winter, depart north-eastbound to come back on a polar route that keeps them 'right' of the North Pole, technically making them round-the-World eastbound trips.


I hadn't thought of that! It does indeed get a bit confusing when you're a few hours out from New York going to Asia and your nearest designated alternate is in Finland. Curse you, Mercator projection!

Not to mention confusing some of the pax. Before departure one time, this guy asked the captain when sunrise would be and the captain said we would not have any sunrise during the whole flight. Alternately you could have two sunrises.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo

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