Flying with United Airlines and wanting to stay connected with your loved ones during your trip, for those passengers, the airline provides a WiFi facility, but you are wondering how to purchase United WiFi. To buy WiFi on United Airlines, connect to the “United_Wi-Fi” network once onboard. Open your browser, and you’ll be directed to the United WiFi portal. From there, you can choose and purchase a WiFi plan using a credit card or miles. Prices vary based on the flight duration and route.