If you are coming to Pamplona, you have two main options to get here:
Also there are some companies to share a route by car. Bla Bla Car is the most popular.+ information
You can find a lot of services online which help you find the cheapest flights from all around the world to Spain. Here are some examples:
If you want some more information about airlines, discounts, check-in, safety regulations, and baggage allowance you can always go to the website of the AENA. AENA is Spanish state-owned company entrusted with the management and the development of airports in Spain.