I proposed an idea to speak at RejectJS in Berlin, so I travelled internationally to speak. The event gave me a free ticket. My travel and accommodation was fully covered by the event. It took me 4 weeks to prepare for my 30 minutes speaking slot, and I had a great time. I'm a woman who has been speaking for 1 year. Also, I marked the "do you need travel assistance?" check box when I submit CFP, and was granted full travel from New York.