I wasn't originally aware of this (so maybe you aren't either) but know that the trekking pole sections do come apart to facilitate packing in checked baggage
We have some nice, lightweight-but-strong, carbon-fiber trekking poles we purchased at Costco. Not expensive - check them out. They're as good as poles I had previously purchased from REI at 3X the cost. The poles from Costco "telescope" but are still a tiny bit too long for my carry-on convertible backpack. I too discovered that it's fairly straightforward to simply pull the pole sections apart. Once disassembled, they break down into sections no more than 21" long, which is just short enough to fit in our packs easily.
A couple suggestions...I've learned from packing these several times in the past year:
You will want to "practice" both taking them apart, and re-assembling them well before your departure day just to be 100% sure you can do it - some small parts may be a little tricky, if you shove things together carelessly you can actually break small pieces where they join.
Also, you may want to find something to wrap over the ends of the poles, as some of the end pieces can be semi-sharp. This isn't an issue of you are the only one who (carefully) handles your bag, but the bag they're in is going to be checked, and possibly tossed around. If your bag is really full (it probably will be) the sharp edges of the pole ends could actually slice through a soft-sided bag when under stress. I found some small (but hard) plastic "caps" that I tape over the ends to prevent the poles from puncturing my canvas backpack; you may need to get creative and scrounge something.
Finally, you will want to wrap the poles in some thick plastic just to keep any filth that they have acquired (while hiking) from contaminating the rest of your bag's contents. Last summer we spent a week in the Faroe Islands, and did a lot of hiking. The trekking poles we brought were a life-saver. There are more sheep than people in the Faroes, and pretty much everywhere we went there was an awful lot of sheep poop around. Try as we might to avoid stepping in a big fresh pile of it, the stuff was unavoidable, and the ends of our hiking poles were covered in it. Yes, we did our best to clean it off before flying home but there were still a lot of Klingons. To avoid mixing anything you walk through with your clothes, bring a good plastic bag to isolate the poles in your bag. This probably would be less of as issue for "urban hiking" but is still worth some forethought.