London to Houston (LHR–IAH) — Airlines, Schedules & Connections

British passport holders enter the US under the Visa Waiver Program (VWP) for up to 90 days for tourism or business. You must obtain an ESTA (Electronic System for Travel Authorization) before departure. The ESTA costs $21, is valid for 2 years or until your passport expires, and allows multiple entries. Apply at esta.cbp.dhs.gov, the only official site. Most approvals come within minutes, but apply at least 72 hours before travel. The 90-day stay cannot be extended under the VWP.

Passport must be an electronic/biometric passport (all UK passports issued since 2006 qualify). You need proof of onward travel out of the US within 90 days. CBP officers at the port of entry make the final admission decision and can ask about trip purpose, accommodation, and ties to the UK. Automated passport control (APC) kiosks and Global Entry (for pre-approved travelers) speed up arrival processing. Anyone with certain criminal convictions, prior visa denials, or dual nationality with Iran, Iraq, Libya, North Korea, Somalia, Sudan, Syria, or Yemen may be ineligible for the VWP and need a B-1/B-2 visa ($185) from the US Embassy in London.

Direct flights from London Heathrow to New York (JFK) run about 7 hours 30 minutes westbound. Multiple US destinations have direct service from London, Manchester, and Edinburgh. The 90-day VWP clock does not reset by visiting Canada, Mexico, or the Caribbean and returning to the US; the original 90 days continues to count down. No vaccination requirements for UK arrivals. US Customs allows $800 worth of goods duty-free per person.

Heathrow Express runs from London Paddington to T5 and T2/T3 in 15–21 minutes (£37 single, cheaper booked online or via the Heathrow app). Elizabeth line (Crossrail) is a lower-cost alternative; Paddington to T5 in 34 minutes from £13.50 with an Oyster/contactless cap of £14.90. The Elizabeth line also serves central London stations including Bond Street, Farringdon, and Liverpool Street.London Underground Piccadilly line serves all terminals (T2/T3/T4/T5) from central London in 40–60 minutes (£6 with Oyster). Taxis (black cabs) from central London cost £55–90 depending on traffic. Coach services from Victoria Coach Station (National Express) cost from £10 booked in advance.

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.