I'm working remotely for a month right now and needed a monitor there to work. I had two ideas:
1. bring one in a suitcase on my flight
2. just buy one locally once I got there
I decided to just bring my existing 27" monitor and wait until the day of my flight to try and pack it... Of course it was about 2 inches too long for a standard large suitcase.
I quickly found a (physical) store which sold a cheap 23" Dell monitor and bought it. It easily fit into the suitcase and I've been happily using it for 3 weeks now. Only downside was going back to 1080p :(