The website for Frankfurt Airport is: www.frankfurt-airport.com
Traveling to Saarbrücken by train:
Frankfurt Main is one of the largest German airports with many good connections. To reach Saarbrücken, it's best to take a direct train from the airport. From your terminal (usually Terminal 1), you can reach the Regional Train Station ("Regionalbahnhof"). If you arrive at Terminal 2, there is a free Sky Train (train) and a free shuttle bus that takes you to Terminal 1, where the Regional Train Station is located.
There is a direct connection with a regional train that departs hourly to Saarbrücken. The journey takes approximately 2 hours and 35 minutes. The schedule can be viewed online at www.bahn.de. Tickets can be purchased online (e.g., through the DB Navigator app), at a ticket machine, or at the ticket counter directly on the platform.
Traveling to Saarbrücken by bus:
Long-distance buses are a good alternative to train travel. There is a direct bus connection between Frankfurt Airport, Terminal 2, and Saarbrücken: www.flixbus.de. The travel time is approximately 2 hours and 50 minutes, and tickets cost only around 10 €. You can find the bus at Terminal 2, at the "Busbahnhof" (bus station). Tickets must be purchased online in advance.
Traveling to Saarbrücken by car:
Finally, there are numerous car rental agencies at Frankfurt Airport, often open 24 hours a day. You can rent a car from this airport and return it at the Saarbrücken train station. If you're traveling with several people, this can be a cost-effective option: Car rental center at Frankfurt Airport.
Hotels:
If you get stuck at the airport, for example, if your plane arrives very late and there are no more connections, you can spend the night at the airport. A list of hotels can be found on the airport's website: Hotels at Frankfurt Airport.