Solve the puzzle

123456
Across
  1. 2. - An act of traveling from one place to another.
  2. 3. - A period spent away from home enjoying time off.
  3. 5. - A short travel for pleasure or business.
  4. 6. - This takes off and lands at an airport.
Down
  1. 1. - A nation with its own government and borders
  2. 4. - The city where a country's government is based.