This already exists in some cities. Though I would love this to be available in all major cities myself. Here in Vienna for example we have the CAT (City Airpor

This already exists in some cities. Though I would love this to be available in all major cities myself. Here in Vienna for example we have the CAT (City Airport Train) [0] Its an express train taking you from a city center railway station directly to the airport in about 15 minutes and also allows you to check in and drop off your luggage up to 24h before departure. It's criticized by locals as too expensive compared to the S-Bahn serving the same connection (just slower/with more stops) but especially for visitors it of course gives you the huge benefit of not having to deal with any luggage on the last day when you already had to check out of your hotel. [0] https://www.cityairporttrain.com/en/news/unique-in-europe-the-cat-city-check-in https://www.cityairporttrain.com/en/news/unique-in-europe-th...