<div class='quotetop'>QUOTE (spongebue @ Jan 29 2009, 11:04 PM) <{POST_SNAPBACK}></div>
I&#39;m not sure if the cost varies from one airline to another (don&#39;t think it does) but LAX to LHR nonstop through AA or BA is $105 in, $215 returning through BA or VS on a ZED. Of course, it&#39;s all distance-based, so you should look at making your way to JFK or another major airport out east (LAX-IAH-JFK on CO, perhaps) on your own airline, where it&#39;s free, then ZED from there to LHR. Looks like $90 into LHR on AA, $200 returning. Hmm, guess that&#39;s not much of a savings, but even then... keep your eyes peeled, and see if you can&#39;t just get on a flight from IAH or EWR on CO.

To book a ZED, there should be some link from CO&#39;s employee website. NW takes us to http://ifc.id90.com, but it doesn&#39;t have Continental on there.[/b]
Actually there could be a fare difference depending on the type of agreement CO has with each of the carriers involved. CO has a ZED medium with AA and probably with BA to, with VS it could be ZED low.

As for booking, you wouldn&#39;t, these are space-available so you would need to contact the airline(s) involved to create a flight listing. For travel on BA you would need to access their flight listing website The ID90.com url provided by spongebue is not a booking or flight listing tool. It is a fare calculator and NW uses it as a tool for its employees to request ID/ZED tickets.