According to forum posts, Frankfurt Airport offers multiple transfer options. For instance, travelers can use the Skyline train to navigate between non-Schengen gates within the transit area, which is especially useful for passengers with connecting international flights.

Some travelers mentioned that the transfer might involve going through security and passport control, depending on the origin and destination. For flights arriving from non-Schengen countries and departing to Schengen areas, passport control is mandatory.

For many users, navigating Frankfurt Airport is facilitated by clear signage. Travelers have shared that following these signs is the most straightforward way to reach different terminals and gates. A specific post highlighted the availability of a gate-to-gate service which offers a cart and priority security, making transfers smoother for those with tight connections or mobility issues.

According to forum posts, major car rental companies have desks at Frankfurt Hauptbahnhof, with cars located in a nearby garage. Additionally, car rental services are also available at Frankfurt Airport, offering convenience for travelers arriving by air.

Some travelers mentioned that renting a car with a debit card is possible but typically comes with restrictions such as issuer requirements and deposit amounts. Companies like Sixt are noted to accept debit cards under certain conditions, such as a deposit of around €500.

Travelers have discussed the ease of renting a car at one location and returning it to another, such as picking up at Frankfurt Hauptbahnhof and returning at Frankfurt Airport. However, it is suggested that taking the train to the airport and renting and returning the car there might be more straightforward, avoiding potential complications with different return locations.

Some travelers suggested staying at hotels in the Gateway Gardens area, which is an office park close to Frankfurt Airport with its own train station and public buses to the terminals. Hotels in this area include Holiday Inn, Meininger, Moxy, Park Inn by Radisson, Element, Hyatt Place, and Steigenberger. According to forum posts, the Steigenberger has been praised for its restaurant, Unterschweinstiege, and offers shuttle services to the terminals.

For those preferring direct terminal access, the Hilton, Hilton Garden Inn, and Sheraton hotels are directly adjacent to Terminal 1 of Frankfurt Airport. Travelers have noted that these hotels provide convenience for early flights and easy access to airport facilities.

According to forum posts, the primary service provider for train travel from Frankfurt to Berlin is Deutsche Bahn. Some travelers also mentioned Flixtrain as an alternative, especially for those on a budget, noting similar journey times but potentially better amenities like WiFi on Flixtrain.

Travelers have called out that Deutsche Bahn offers various classes with the option to reserve seats in a toddler compartment for extra convenience. It is recommended to buy tickets in advance for cheaper fares, similar to airline tickets. There are non-flexible, cheaper tickets as well as flexible, more expensive standard fare tickets that allow changes to travel plans.

For many users, the journey from Frankfurt to Berlin often involves a transfer, typically at Leipzig or Frankfurt Main Hbf. Transfer times are usually tight, about 8-10 minutes, but this is normal in Germany. If a connection is missed due to a delay, the ticket usually allows travel on the next available train without extra charges.

Some travelers recommended a variety of day trips from Frankfurt that can be reached within 90 minutes by train. Popular destinations include Mainz, Limburg, Marburg, Büdingen, Gelnhausen, Seligenstadt, Idstein, and Bad Homburg. These towns offer historic sites, beautiful scenery, and local cuisine.

For those interested in history and outdoor activities, the Hessen Park Open Air Museum and the Saalburg Roman Fort were mentioned as worthwhile attractions near Bad Homburg. These sites provide insights into historical architecture and ancient Roman life.

Travelers have also suggested the Middle Rhine Valley for its scenic beauty and the opportunity to explore more of the natural landscapes surrounding Frankfurt. This region is known for its picturesque villages and vineyards along the Rhine River.

According to forum posts, Dauth Schneider is highly recommended for its traditional Frankfurt Green Sauce served with boiled eggs and potatoes. This local delicacy is a favorite among visitors.

For those interested in authentic German food, the Sachsenhausen district is a go-to area, where places like Atschel and Fichtekränzi offer a genuine taste of Frankfurt's applewine taverns. These venues are popular with locals and are known for their cozy and traditional atmosphere.

Some travelers mentioned exploring Frankfurt's Kleinmarkthalle, a vibrant market hall where a variety of fresh foods and local specialties can be sampled. This location provides a casual dining experience amidst the city's bustling market activity.

For a late-night meal, visitors have enjoyed the area around Römer, which is known for its range of restaurants that stay open late, offering a chance to dine and explore the city's historic center after dark.

According to forum posts, train tickets can be purchased directly at Frankfurt Airport, which houses two train stations: Regionalbahnhof and Fernbahnhof. Ticket machines and a DB Reisezentrum (travel center) are available for purchasing tickets on the spot.

Some travelers mentioned that train tickets could also be bought online via the official Deutsche Bahn website (www.bahn.de). This site offers various fares, including flexible and saver options. Saver fares are cheaper but bound to a specific train, while flexible fares are more expensive but allow travel on any train during the validity period.

For those looking to buy tickets immediately upon arrival without pre-booking, it is noted that tickets bought on the spot tend to be more expensive. Travelers have the option to buy tickets that are valid on any train, which provides flexibility in case of flight delays or other uncertainties.

According to forum posts, the Christmas market in Frankfurt itself is highly recommended and is traditionally open until December 22nd. For a unique experience, the CityXMas market on top of the Konstablerwache parking garage offers great skyline views and remains open until December 30th.

Many travelers suggest visiting nearby towns for their Christmas markets. Mainz, Wiesbaden, and Heidelberg were frequently mentioned as excellent choices easily accessible by train from Frankfurt. These markets offer a traditional festive atmosphere with unique local features, such as the medieval-themed market in Esslingen.

Travelers have called out specific features at nearby markets, such as the medieval and Baroque-themed markets in Esslingen and Ludwigsburg, respectively. These markets are praised for their historical settings and thematic decorations, enhancing the festive experience.