The best time to book a flight to Lisbon with Ryanair is 41 days before departure. On average, fares are higher if you book on the same day as departure.
For Economy class flights, the cheapest month to fly this route is January. The most expensive months are August and July.
In terms of precipitation, rainfall in Lisbon ranges from 6.0 - 122.0 inches per month. December is typically the wettest month, when rainfall can reach 122.0 mm. July is typically the driest time to visit Lisbon when rainfall is around 6.0 mm.
If weather is an important factor for your trip to Lisbon, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).
Food
Crew
Entertainment
Boarding
Comfort