Flight to Copenhagen and then by train to Karlskrona.
Link for train tickets
Flight from/via Stockholm to Karlskrona/Ronneby airport. 3-4 flights/day (50 min). Transport to hotel by bus/car.

From Gothenburg: Train or car ~350 km.

From Gdynia Stena Line (Ferry Gdynia-Karlskrona).
Free of charge!!
https://www.stenaline.com/travel
Send Mail to: stenaline.internresor@stenaline.com

Please attach following information in mail:
Subject: ISC20202
Your name and address:
Date of birth:
Phonenumber:
Mail:
Date outward and time:
Date return and time:
Number of passengers and vehicles:
Car registration number:
Type of cabin:

ESP
Fecha de ida y vuelta y hora de salida
Numero de personas y vehiculos
Deseo de cabina
Entero nombre y apellido y direccion
Numero de celular
Direccion de email
Fecha de nacimiento
Numero del registro del auto
 Por favor indice el código ISC2020 en el rayo de subjeto!

GER
Datum der Hin- und Rückfahrt
Anzahl der Personen und Autos
Wünsch der Kabine
Vollständigen Vor- und Nachnahme und Adresse
Nummer des Handys
Emailadresse
Gebuhrtsdatum
Nummer der Registrierung des Autos
 Bitte die Kode ISC2020 in der Zeile des Themas angeben!
 

From Copenhagen: Train direct from airport to Karlskrona, ~ 3 hours via Malmö. (Train leaves every hour)