If you are a frequent flier, your prospect for picking up a bed bug increases significantly. Yes they bite, leave blood and their “stuff” behind but they also totally infest carpets, beds, drapes, furniture and clothes. So here is where you pick them up: planes, hotels, motels, taxis, uber, lift, trains, buses, and your friends house. Starting with the hotel (or any new lodging), inspect the mattress seams and corners looking for brown stains or spotting. Then check out the sofas, chairs and most critically behind the headboard. While you are traveling, wrap your suitcase(s) in a garbage bags and store your clothes in a Ziploc bags.
https://gogreenpestcontrol.ca/travelling-without-bed-bugs/
https://www.linkedin.com/pulse/travelling-without-bed-bugs-randy-bilesky/?published=t