OurAirports is getting better at filtering. While the maps still show everything, you can now filter most of the lists to show any of the following:

• active land airports,
• airports with scheduled airline service,
• seaplane bases, or
• everything, including heliports, closed airports, etc.

(I figured there’s no point showing only heliports, since helicopters can land at regular airports as well).

Here’s a list of airports in Western Australia with scheduled airline service, and here’s a list of the closest seaplane bases to Edmonton, Alberta.