Airplanes or Spacecraft?

We know that both airplanes and spacecraft have had huge influence on our world; and both are probably some of the most important inventions or developments in our world today. But which are most influential?

Since 1903, airplanes have become something we use so much.. What would life be like if we had to wait weeks to travel to another continent? So much more of our lives would be consumed with transportation, not to mention the implications (or lack of) on warfare. But with spacecraft, we've explored some of the things outside of our world - What influence will it have over our future? When we have to think of settling in other planets or something?

Which one is more influential? Or has the potential to be?