Yes, there are multiple flights from Singapore Island Airport to Tenerife North for under S$ 1,197. The cheapest flight booked recently is on Air France for just S$ 1,084, but on average you can expect to pay S$ 1,156.
There are no direct flights from Singapore Island Airport to Tenerife North, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
Airlines like KLM and Air France fly from Singapore Island Airport to Tenerife North in about 23h 15m. The time it takes to get you to your destination can typically vary by up to 2h 05m. Both multi-stop and direct flights can be found to your destination and back.
Air France, at S$ 1,084, was found to be the cheapest airline from Singapore Island Airport to Tenerife North. An alternate airline flying to your destination would be KLM.