Private car service
A pre-arranged car is the cleanest IAH-to-downtown option when the arrival is tied to a hotel check-in, an office, a George R. Brown Convention Center event, or an EaDo venue. IAH publishes terminal-specific pickup doors on the baggage-claim curb — Terminal A Door A-113 or A-115, Terminal B Door B-101, Terminal C Door C-102, Terminal E Door 103B or E-103 — and Terminal D international arrivals exit through the Terminal E arrivals hall, so the pickup plan can name the exact door before the flight lands. Because curbside waiting is prohibited, the assigned chauffeur stages in one of the airport's free cell phone lots until you are ready.
METRO 500 Downtown Direct
The 500 Downtown Direct is the genuine budget star of this route: a nonstop coach between Bush IAH and downtown for a flat $4.50, with the fare covering transfers to local bus and METRORail for up to three hours. It boards at Terminal E, Level 2, outside Door E-201, runs every 30 minutes seven days a week, and the coaches carry free Wi-Fi, USB outlets, and overhead luggage storage. The catches: first departures fall between 5 and 6 am, last departures between 8 and 9 pm, and the downtown stops still leave a final walk or short ride to most hotels.
Route 102 local bus
Route 102 is the cheapest way downtown at $1.25, boarding at Terminal C outside Door C-105. It is a local route with frequent stops, so plan roughly 50 to 90 minutes to the Downtown Transit Center. It only makes sense for travelers with light bags, plenty of time, and no fixed arrival commitment.
Taxi or rideshare
Taxis and app rides both work for flexible travelers who are comfortable sorting out the pickup after landing. The tradeoff is control: metered or surge pricing, no confirmed vehicle class, and curb logistics handled in the moment. During convention move-ins, major downtown events, and stacked evening flight banks, that variability matters more than the sticker difference.