Porto to Houston (OPO–IAH) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
While no nonstop service exists between OPO and IAH, 1-stop connecting options are available.
Connection Landscape
On-Time Performance
Other ways to reach Houston from Porto
| Metric | OPO→IAH | LIS→IAH |
|---|---|---|
| Distance from OPO | – | 172 mi |
| Nonstop airlines | – | 1 |
| Weekly flights | – | – |
Travel Essentials
OPO: WEST · IAH: CDT
When it's 6:00 PM in Porto, it's 12:00 PM in Houston.
Portugal is part of the US Visa Waiver Program. Portuguese passport holders enter the United States for up to 90 days without a visa, but must obtain an approved ESTA (Electronic System for Travel Authorization) before boarding. The ESTA costs USD 21, is valid for 2 years or until the passport expires, and covers multiple entries. Apply at the official CBP site (esta.cbp.dhs.gov) at least 72 hours before departure.
The 90-day stay cannot be extended, and you cannot change immigration status while in the US on the Visa Waiver Program.
No direct rail from IAH. The METRO bus 102 (IAH Express) runs to downtown Houston's transit center (60–90 min, $1.25). Taxis to downtown Houston cost $50–70. Ride-hails pick up at the designated Rideshare zones outside baggage claim on the lower level.IAH has five terminals (A–E) connected by an underground tunnel with trams. Terminal D handles international arrivals. Rental car agencies are in a consolidated facility adjacent to Terminal C; a free IAH Connector bus runs between terminals and the rental car center. The Galleria / Uptown area costs $35–50 by ride-hail.
Humid subtropical climate. Hot, humid, and wet for much of the year. Summers are brutal (33–38°C) with high humidity and near-daily afternoon thunderstorms. Severe storms with hail and high winds regularly cause ground stops from April through September. Houston's flooding risk is significant. Heavy rain events, including tropical system remnants, have flooded airport roads, cutting off surface access even when the airport itself remains operational.
Winters are mild (5–18°C) with occasional ice storms. These are rare but highly disruptive when they occur. Hurricane season (June–November) requires monitoring for Gulf storms. October through March has the best flying weather.
OPO–IAH Quick Facts
Frequently Asked Questions
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Charles de Gaulle, Newark Liberty and Montreal / Pierre Elliott Trudeau. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Lisbon (LIS).