But seriously, you can post your wants on the ALPA boards at the base you are looking. Most don't look at those boards though.

Next time you are in the base you want to trade, I'd try leaving notes in mail slots. Take the monthly awards list, use that to find pilots in fleet and seat, leave a short note asking for consideration of your trade with your contact info.

It's a long shot, but it can work. Juniority doesn't enter into it, just willingness to trade. That is until someone senior to you wants the trade, but that doesn't happen very often. Again, most don't look at the trade boards or the trade posted on Skynet unless they are looking for a trade too.