In case you'll wondering, yes, it is possible to get a decent cup of joe ( latte even! ) and a healthy breakfast at Senai airport. They have decent restaurants there that offer healthy breakfasts of muesli and oats and other unhealthy options like Dunkin's rainbow-sprinkled doughnuts.
Honestly, it isn't such a pain going to Senai from Singapore. Here's a couple of ways, ranging from the budget friendly to the more costly:
If you're going by bus, you'll need to find your way from Singapore to Sentral Kotaraya (City) Bus Terminal in Johor Bahru where an airport coach will take you to Senai Airport. There are 2 ways to get to Kotaraya. The faster way is to take the Causeway Link Yellow Bus opposite the Kranji MRT Station in Singapore (available every 15 minutes). The slow-mo way is to take SBS bus 170, but it'll take forever and a day to get there. Once you're in Kotaraya, the airport shuttle will take you to the airport. Details of the bus schedule can be found here.
Take a Singapore-Johor taxi from Singapore ( Rochor Road Bus / Taxi Terminal ) to Senai airport. Take this option only if you don't mind paying S$50 per cab.
In Johor Bahru, taxis back to Singapore are available at the Sentral Kotaraya bus terminal. So if you're from Senai Airport, just take the airport shuttle back to Kotaraya and from there, just hop on a COMFORT cab back to Singapore. Yes, comfortable, brand- new 3L Singaporean taxis are waiting there and they'll take you back to Singapore for about $30-40.
Senai Airport is served by AirAsia, Riau Airlines and Malaysian Airlines.Click here for the flight schedule.
Note: Just be forewarned, if you're using budget airline, Air Asia, you might have to walk across the tarmac to the plane! It can be a real pain if you have knee problems. Other airlines are connected via the skybridge.