The MP for Stevenage is Stephen McPartland. Stevenage is a marginal seat that covers the town of Stevenage. Stephen McPartland "opposes the [airport's] expansion plans".
The MP for North East Hertfordshire is Oliver Heald. NE Herts is a safe Conservative seat and includes Letchworth, Baldock & Royston as well as much of rural east Herts including Buntingford and almost as far east as Bishops' Stortford. Oliver Heald is more concerned about fighting Stansted expansion, and favours "Boris Island".
The MP for Hitchin and Harpenden is Peter Lilley. This is also a safe Conservative seat; the name describes the area. On his website, Peter Lilley says he wants to "limit" Luton Airport expansion.