To call airlines for free, use Wi-Fi calling apps (like Skype for US toll-free numbers), text support options (United texts), airline apps for chat/self-service, or look for specific "stranded passenger" hotlines like FlyersRights.org (877-FLYERS-6) for urgent issues, as traditional free numbers might not exist, but digital/app alternatives often do for convenience.  Digital & App Solutions Wi-Fi Calling Apps: Use apps like Skype to dial US 1-800/toll-free numbers if you're abroad, a common traveler hack, notes a Reddit post. Text Support: Some airlines, like United, offer texting services (e.g., text "UNITED" to 32050) for quick help. Airline Apps/Chat: Use the airline's mobile app or website for live chat with agents; selecting "I still need help" often bypasses basic bots, according to The Points Guy.  Specialized & Urgent Help FlyersRights Hotline: For emergencies like flight cancellations/delays, FlyersRights.org provides a hotline (877-FLYERS-6) for stranded passengers, a non-profit service.  General Tips Check Airline Sites: Visit the airline's website (e.g., AA.com, Southwest.com) for their specific contact options, as they vary. Government Resources: The US DOT lists consumer contacts for airlines, though these are often for complaints.