The only plane that travels to Coron during the time that we went there are Asian Spirit and SEAir. We took SEAair, and it's a very small 19 seater plane. The size is just like that of a small bus and the seating arrangement inside the plane is based on weight, should be balanced on both sides. Before, departing the stewardess conducted the briefing and gave candies and left us on our own. That's how small the plane was, no room even for the stewardess :-)
The best way to go, for those who just plan to stay in Coron for just 3 days and 2 nights, is to go there early Friday (or on your day 1), take the first or the only plane that goes there in the morning.
Going back (on your day 3; in our case Sunday), take the ferry that leaves at around 9PM. You will reach Manila at 8AM.
Taking the plane on your way back would mean preparing to go to the airport at around 11AM on your day 3 to be in the airport by 1PM which will be waste as there are a lot of places to explore.
This way, your 3 days stay is maximized.
One of the cheaper ways to go to Coron is via Superferry or Negros Navigation. My friend recommends Superferry. It takes you about 12hrs for a 1-way trip but since departure from Manila is late afternoon, and arrive in Coron 6-7am the following day. Going back to Manila, your departure from Coron is 10:45pm, and you arrive at Manila pier the following day 1:30pm. You travel & sleep. By the time you wake up, you're at your destination. It will be a different travel experience. You can book your tickets online.
The boat trip back to Manila could sometimes experience delay as it comes from Puerto Princesa, which is 12 hours away from Coron.
Be sure to call the pier for updates so you don't have to wait at the harbor for a long time. We had to wait for more than 3 hours because we didn't know about the adjusted schedule.
Tricycles is the primary mode of transportation around Coron town. The fare is P6.50 per person for short distances. There's a terminal close to the market and pier but a lot or tricycles just drive around so you can hail one from just about everywhere.