In light of Ryanair's decision to cancel tickets bought from third party websites, you can no longer search Ryanair flights through price comparison sites.
To compare Ryanair prices with other airlines, carry out a price comparison on Kayak, a flight aggregator site and then do a separate search on Ryanair.com. However, be sure to go all the way to the point of purchase as the first price you see with Ryanair is nowhere near the full price you will pay.
Read more on How to Get the Cheapest Fares with Ryanair.
Also, it isn't always easy to compare prices with Ryanair and easyJet because they don't fly to the same airports. Take a look at this page of Alternatives to Ryanair flights, which shows you which is the nearest airport to each of Ryanair's flights to Spain.
Note that both airlines now offer a price guarantee. Read about Ryanair & easyJet Price Guarantees: What You Should Know
