Need advice from expert travelers. Here's the deal: will be flying several times BOS-ZRH in 2014. speed and price are important, so will most likely be the direct flight and economy fare (usually non-refundable). there's only one non-stop flight like that: operated by swiss, but united also has a flight number for that flight.

with that in mind, what's the best mileage account to post the miles? they will almost certainly be redeemed to the same flight and the same category (for the mrs.). so it'll be a swiss metal flight between us and europe. and for the redemption, naturally, no fuel surcharge fees.

i checked and miles&more offers only half of the miles of united this year. so it seems i should post them to mileageplus? but then I won't get status with them, correct? since I need minimum 4 segments on united metal flights. it's not a deal breaker, but would be nice if that was also an option.

any other program worth considering: aeroplan, ana, etc.?