15th leg: 1/29/2002
Ixtepec, Mexico to Retalhulea, Guatemala
airport: Retalhulea

Mexico sure is a long country. Had a nice smooth landing on a runway with no lines painted down the center, so it wasn't obvious if I was off center or not. 

16th leg: 2/1/2002
Retalhulea Guatemala to San Salvador, El Salvador
airport: El Salvador Intl
1.7 hours 

I didn't really want to go to El Salvador but it was the next logical step without going out of my way.
17th leg: Sunday 2/3/2002
MSLP to MNLN, San Salvador, El Salvador to Leon, Nicaragua
airport: Fanor Urroz
1.5 hours
18th leg: Tuesday 2/5/2002
MNLN to MRLB, Leon, Nicaragua to Liberia, Costa Rica
airport: Daniel Oduber Quiros Intl
1.4 hours