The consensus on Reddit (specifically in subreddits like r/Travel and r/EndTipping) is that tipping shuttle drivers is optional but common when they handle your luggage. If the driver helps you load and unload heavy suitcases, the standard "Reddit advice" is to tip $1 to $2 per bag, or a flat $5 for a family. However, for "free" airport parking or rental car shuttles where you carry your own bags, many Redditors argue that no tip is necessary, as the drivers are paid a full hourly wage. The sentiment on Reddit has become increasingly frustrated with "tip creep," with many users advising others not to feel pressured by aggressive drivers who hover for a tip. However, for hotel shuttles that are provided as a courtesy, a small tip is still seen as a "thank you" for the convenience. Ultimately, the community agrees: tip for the physical labor of bag handling, but feel free to skip it for the ride itself if no extra service was provided.