I just did this a couple months ago when I planned a trip from Chicago → Paris → Rome → back home. On Expedia’s site, I clicked “Flights” and then chose the “Multi-city” option (it’s right next to round-trip). From there I just plugged in each leg of my trip with the dates. Honestly, it worked great, but I made a mistake with one of my Rome dates. Instead of stressing, I called 866-204-0803 and they fixed it in minutes—way faster than trying to dig around online. So my advice: build the multi-city itinerary directly on the site, but if you need to tweak, cancel, or rebook, just call that number. Saved me a ton of hassle.
