Cheap Flights From Houston (IAH, HOU) | 2026 Deals, Routes & Tips

Finding Cheap Flights From Houston

Houston is served by two major airports: George Bush Intercontinental Airport (IAH), a global hub for United Airlines, and William P. Hobby Airport (HOU), a major base for Southwest Airlines. This dual-airport system provides extensive domestic and international coverage, with IAH focusing on global long-haul routes and HOU on domestic and near-international point-to-point travel.

IAH offers an immense international network with direct flights to Europe, Asia, Latin America, Australia, and across North America. HOU provides strong domestic connectivity, especially to the Eastern U.S., and international service to Mexico and the Caribbean. Top domestic routes from both include flights to major coastal cities and hubs.

IAH is a primary hub for United Airlines and is served by dozens of international carriers. HOU is dominated by Southwest Airlines. Both airports are also served by American, Delta, JetBlue, Spirit (at IAH), and Frontier. This creates intense competition on many domestic routes.

To find the cheapest flights, always compare fares from both IAH and HOU. For international travel, book from IAH 3-6 months in advance. For domestic leisure travel, book from HOU on Southwest 1-3 months ahead. Use flight comparison tools with a "Houston (All Airports)" search. Flying on weekdays (Tuesday-Thursday) is cheaper. Houston is a competitive market for fares to the West Coast, Northeast, and Latin America. Southwest from HOU often provides the best value for domestic travel. For complex international itineraries, IAH's vast network is typically more suitable.