United Airlines Reservations Official Website is https://www.united.com/ual/en/us/fly/reservations.html
To make a reserve you have to do the following:
- Go to the URL mentioned above.
- Select the language on your right.
- Select the region on your left (you can use the map).
- Click on Change.
- In the following screen you will have to choose among different types of reservations: Flight search, car search, hotel, vacation packages and Cruises. Select your choice and wait for the next screen.
- Fill the required fields to get your reservation done and happy flight!