However, Frontier Airlines cannot presently allow users to communicate over WhatsApp while in flight. It is recommended that travelers follow the airline's rules for using electronic devices and web browsing while in flight. While being a widely used messaging app, Frontier Airlines WhatsApp Number may not allow users to use it on some flights because to technical issues or legal restrictions. For the most recent details on allowed electronic devices and communication services during flight, passengers should check with Frontier Airlines directly or check their website at 1-844-296-4458.