Originally Posted by
jules128
So I've noticed that the only nonstop flight from halifax to dc is on United or Air Canada. Does it make a difference which of these I buy the ticket from? Which of these FF programs would it be more beneficial to earn miles with or is it the same?
Will you be doing a lot of flying between Halifax and Washington?
This particular non-stop is operated by Shuttle America as United Express. United's web site says that it has "explus" seating (meaning lots of Economy Plus seats).
According to
http://www.united.com/page/article/0,6722,1314,00.html , only United Mileage Plus elites and United Global Services members can prebook Economy Plus seats, although others may get assigned to them at check in time if regular Economy is full.
So if most of your flying is on this route, and you want Economy Plus seating, it may be better to accumulate on United (or at least enough to reach the elite level needed for Economy Plus).
However, if you expect to want to use award tickets on Air Canada rather than United, then note that using United miles for partner / alliance awards requires a phone call, while Air Canada allows web booking for both Air Canada and partner / alliance awards.