Here are the directions to reach Trias 17, Kypseli, Athens 11257, Greece, by car from Athens International Airport:

1. *Exit the Airport*:
   - Follow signs for *Attiki Odos/A6* towards *Elefsina*.

2. *Merge onto Attiki Odos (A6)*:
   - Continue on *Attiki Odos/A6* for approximately 23 kilometers.

3. *Take Exit 8 to merge onto E94*:
   - Follow signs for *Athens*.

4. *Continue on E94 and merge onto Leoforos Kifisou (A1)*:
   - Stay on *Leoforos Kifisou* for about 4 kilometers.

5. *Take the Exit toward Piraeus/Peristeri*:
   - Keep right at the fork, follow signs for *Acharnes/Lamia*.

6. *Merge onto Leoforos Kifisou*:
   - Continue straight for approximately 2 kilometers.

7. *Take the Exit toward Patission Street/28th October Avenue*:
   - Merge onto *Patission Street* and continue for about 2.5 kilometers.

8. *Turn Left onto Agiou Meletiou Street*:
   - Continue on *Agiou Meletiou* for approximately 1 kilometer.

9. *Turn Right onto Evelpidon Street*:
   - Drive for about 500 meters.

10. *Turn Left onto Trias Street*:
    - Continue straight until you reach *Trias 17*, on your left.

The entire drive typically takes around 35-45 minutes, depending on traffic conditions.