how long does it take to reach ISS

Astronauts usually reach the ISS in about 6 to 24 hours , though some missions take around 28 hours and a few can be faster or slower depending on the spacecraft and orbit plan.

What changes the travel time

• Spacecraft type: Soyuz can get there in as little as about 8 hours , while Crew Dragon missions are often around 6 to 28 hours.

• Mission profile: Fast-track launches use a more direct orbital approach; standard missions may take about a day or more.

• Docking and checks: After arrival, the spacecraft still needs 1 to 2 hours to stabilize and run safety checks before crew access.

Simple answer

If you want the shortest practical answer: most trips to the ISS take roughly one day or less.