Affordable flights from Houston (IAH) to Madrid (MAD) from US$ 560.99*

from US$ 499^.99*

from US$ 528^.99*

from US$ 1.007^.99*

from US$ 496^.99*

from US$ 477^.99*

from US$ 459^.99*

from US$ 486^.99*

from US$ 454^.99*

from US$ 496^.99*

from US$ 907^.99*

from US$ 760^.99*

from US$ 560^.99*

from US$ 524^.99*

from US$ 933^.99*

from US$ 1.031^.99*

from US$ 481^.99*

from US$ 771^.99*

from US$ 549^.99*

from US$ 479^.99*

from US$ 454^.99*

from US$ 539^.99*

from US$ 496^.99*

from US$ 629^.99*

from US$ 475^.99*

from US$ 539^.99*

from US$ 634^.99*

from US$ 507^.99*

from US$ 560^.99*

from US$ 977^.99*

from US$ 979^.99*

from US$ 539^.99*

from US$ 570^.99*

from US$ 509^.99*

from US$ 634^.99*

from US$ 518^.99*

from US$ 319^.99*

from US$ 529^.99*

from US$ 496^.99*

from US$ 430^.99*

from US$ 759^.99*

from US$ 369^.99*

from US$ 1.049^.99*

from US$ 518^.99*

from US$ 935^.99*

from US$ 459^.99*

from US$ 518^.99*

from US$ 475^.99*

from US$ 599^.99*

from US$ 750^.99*

from US$ 469^.99*

from US$ 507^.99*

from US$ 454^.99*

from US$ 518^.99*

from US$ 539^.99*

from US$ 454^.99*

from US$ 519^.99*

from US$ 528^.99*

from US$ 689^.99*

from US$ 549^.99*

from US$ 509^.99*

from US$ 499^.99*

from US$ 499^.99*

from US$ 529^.99*

from US$ 419^.99*

from US$ 935^.99*

from US$ 479^.99*

from US$ 454^.99*

from US$ 489^.99*

from US$ 549^.99*

from US$ 471^.99*

from US$ 486^.99*

from US$ 528^.99*