Pamplona is lovely city with many beautiful sites to see! It would be worth your while to spend a day recovering from the flight and seeing the city. I'm not sure what day you arrive, but on Sundays, the Museum of Navarre is GRATIS! If you are Catholic, the Priest does a lovely mass at the large Cathedral.
There are many little squares with nice cafe's and coffee shops and bakeries...
If you'd like to begin your Camino as a Peregrina, you can book space your second night here at this sweet Alburgue:
Alburgue Casa Paderborn
E-31014 Pamplona
Playa de Caparroso #6 (near Puente Magdalena)
Telephone: 948.211.712
7 Euro includes breakfast!
26 beds
They will take your reservation and it is a very clean, nice alburgue, and much smaller than the municipal.They have a washing machine and dryer, as well as outdoor washstation and clotheslines. They have several HOT showers. It's a very nice place. You could sleep here the first night, get your credential stamped, and be on your way next morning!
Buen Camino!