You can seamlessly transfer your flight plan between ForeFlight Mobile and Garmin GNS 430W/530W, GTN 650/750, and GTN 650Xi/750Xi navigators when connected to a Garmin Flight Stream 210 or 510. This makes everything from pre-flight planning to inflight re-routing easier and faster.
Here is a video that highlights this capability:
Video 1. ForeFlight and Garmin - Two-Way Flight Plan Transfer.