Fly into John Wayne Airport (SNA), the closest airport, located 26.8 mi (43.2 km) from the city center. If you can't find a flight that's convenient for your trip, you can also fly into Los Angeles - Ontario Intl. Airport (ONT), which is 9.8 mi (15.8 km) away.
If you prefer train travel, make your way to Pomona Station or Pomona North Station to see more of the city.