Can I search multi city flights for a customer who wants to visit two or three places on one trip?

Yes, multi city searches are supported in most cases, so a customer who wants to fly out to one city, travel on to another, and come home from a third can be searched and priced as one journey rather than as separate tickets.

In the search you send each leg with its own departure point, arrival point and date, and the API returns the combinations the airlines actually allow. How many legs you can add depends on the suppliers feeding your account. Some content sources handle long open jaw and almost round the world style journeys comfortably, while others limit the number of legs or only support a simple two leg trip. Low cost carriers are usually the tightest here, because they sell each flight on its own, so a multi city trip that involves them often comes back as separate bookings with separate references and separate rules.

It is worth being realistic about what your staff will see on screen. Multi city results take a little longer to come back than a plain return search, and there are usually fewer options, because the fare has to be valid across every leg. Changes and cancellations later apply to the whole ticket rather than one leg, so a customer who decides to drop the middle city may lose more than they expect, and that is the airline rule, not something we can set aside.

Try a few of the routes you sell most often in your test account, see how many legs come back priced together, and then check with your account contact which of your connected suppliers cover the longer itineraries you need.