By Metro: Metro (Subway) is the recomended means of transportation from the Lisbon Airport to Instituto Superior Técnico (IST) Alameda. The Metro is boardable in the Airport (Red Line) and the final destination station Alameda is the 9th stop. From there you can reach IST in 5 minutes of walking.
The Metro opens at 6:30 (AM) and closes at 1:00 (AM). Tickets can be purchased in the automatic vending machines or in the reception post. More information about the fares and schedules is available in the Metro de Lisboa Website.
The detailed map is available here.
By Aerobus: Aerobus can be another option from the Airport to the venue. In the Airport you should take Aerobus Line 1 (to city center) and exit at the Saldanha bus station (4th station). From there you may reach IST by walking 1 km. More information about the fares and schedules is available in the Aerobus Website.
After arriving at Saldanha bus station the path to the venue is described here.
By Taxi: The Airport is just 5 km away from IST. The Taxi fare should be no more than 15€ (depending on travel hours and taxi size).
More information: More information about the public transportation is available in the Lisbon Airport Website.