Can my customers book an airport transfer or a rental car on my portal along with their flight?

Yes, transfers and car rental can sit on your portal beside flights and hotels, so a customer who has just booked a trip can add the ride from the airport without leaving your site. They are searched and confirmed in the same way as a hotel, with the customer choosing a pick up point, a date and a time, and receiving a voucher they can show to the driver or the rental desk.

How much choice they see depends entirely on which suppliers you are connected to for that product. Transfers and car rental come from different suppliers than flights, so having one live does not automatically bring the other. Coverage also varies a great deal by country and by airport, and a small regional airport may have very few options or none at all, which is not something your portal can create on its own.

There are practical points worth knowing before you sell them. Car rental almost always requires a credit card in the driver's name at the counter, along with a licence, and the deposit is handled by the rental company rather than by you. For transfers, the flight number matters, because that is how the driver knows when to wait if the flight is late.

The best next step is to ask which transfer and car suppliers your plan includes, then run a few test searches for the airports your customers actually fly into and see whether the results are good enough to sell.