Helsinki (Vantaa) to Houston (HEL–IAH) — Airlines, Schedules & Connections

Finland is part of the US Visa Waiver Program. Finnish passport holders can enter the United States for up to 90 days for tourism or business by obtaining an ESTA (Electronic System for Travel Authorization) before departure. The ESTA costs $21 and is valid for 2 years or until the passport expires, whichever comes first. Apply at least 72 hours before departure.

You must hold an e-passport (biometric chip). Passport must be valid for at least 6 months beyond the intended stay. Travelers who have visited Iraq, Syria, Iran, North Korea, Sudan, Libya, Somalia, Yemen, or Cuba after March 2011 may be ineligible and need a B1/B2 visa instead.

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.