The nearest major airport is Rostock-Laage Airport (RLG / ETNL).
The nearest airport to Landstuhl in Germany is Zweibrücken Airport. It is 16 miles from Landstuhl.
Paderborn Lippstadt Airport - Paderborn, Germany (PAD / EDLP).
Frankfurter
Memmingen Airport (FMM / EDJA). This airport has international flights from Memmingen, Germany and is about 61km from the center of Ulm.
The closest airport is Maastricht Aachen Airport (IATA: MST, ICAO: EHBK)
Memmingen Airport (FMM / EDJA). This airport has international flights from Memmingen, Germany and is about 61km driving distance from the center of Ulm.
Zweibrücken Airport - Zweibrucken, Germany (ZQW / EDRZ).
Bremen
Hamburg Airport is close to many major seaports.
Munich (MUC) is the nearest major airport. Memmingen (FMM) is smaller, but also nearby.
The closest major airport is brussels airport (BRU / EBBR). This airport is in Brussels, Belgium and is 84 km from the center of Maastricht, Netherlands. Another major airport is dusseldorf international (DUS), which is in Dusseldorf Airport, Germany and is 89 km from Maastricht, Netherlands.
Warsaw is the nearest major international airport, but you might consider Krakow, which is very close.