There are several affordable hotels near the international airports in Germany. Here are some options near some of the major airports:

• Frankfurt Airport:

• Ibis Budget Frankfurt Airport: This is a budget-friendly option located just a few minutes from the airport. Rooms are simple but comfortable and include free Wi-Fi.
• Motel One Frankfurt-Airport: This hotel is also located close to the airport and offers stylish, modern rooms at a reasonable price.

• Munich Airport:

• Holiday Inn Express Munich Airport: This hotel is located just a short shuttle ride from the airport and offers comfortable rooms with free Wi-Fi.
• Novotel München Airport: This mid-range hotel is located directly at the airport and offers spacious rooms with all the necessary amenities.

• Berlin Brandenburg Airport:

• Ramada Hotel Berlin-Alexanderplatz: This budget-friendly hotel is located about 30 minutes from the airport and offers comfortable rooms with free Wi-Fi.
• Crowne Plaza Berlin-Potsdamer Platz: This mid-range hotel is located about 25 minutes from the airport and offers spacious rooms with all the necessary amenities.

These are just a few options, and prices may vary based on the time of year and availability. You can also check websites such as Booking.com or Expedia for more options and to compare prices.