George Bush Intercontinental to Lisbon
4770 miles great-circle distance, typically flown in 10h 00m with 8 airlines operating direct service from George Bush Intercontinental (IAH) to Lisbon (LIS). Cheapest fares are usually in January (around $449 return), with peak prices in August (around $1347). Departures on a Tuesday tend to undercut weekend prices on this corridor.
Flying from George Bush Intercontinental
Houston George Bush Intercontinental is United Airlines' second-largest hub after Newark, with five terminals and a Skytrain people mover connecting them. METRO's bus 102 runs from the airport to downtown Houston in around 50 minutes; light rail does not extend to IAH. International long-haul through Houston is heaviest to Latin America (over 30 destinations) and Europe, with Lufthansa, KLM, Air France and British Airways all operating daily and growing Middle East service via Qatar, Emirates and Turkish.
Arriving in Lisbon
Lisbon Humberto Delgado is on the city's northeastern edge, 7 km from the centre. The Aeroporto metro station connects to the city in 25 minutes for €1.80. TAP Portugal dominates the US-Lisbon corridor with capacity from JFK, EWR, MIA, BOS, IAD, ORD and SFO; United adds capacity from EWR and IAD. Lisbon's mild winters make October–April excellent value travel; summer fares (July–August) double off-peak prices.
Who flies IAH to LIS?
| Airline | IATA | Flight time | Cabin |
| United Airlines | UA | 10h 00m | Economy |
| British Airways | BA | 10h 00m | Economy |
| Lufthansa | LH | 10h 00m | Economy |
| Air France | AF | 10h 00m | Economy |
| KLM | KL | 10h 00m | Economy |
| Qatar Airways | QR | 10h 00m | Economy |
| Emirates | EK | 10h 00m | Economy |
| Turkish Airlines | TK | 10h 00m | Economy |
8 carriers fly direct on this corridor. Frequencies vary by season — summer and winter holiday peaks see additional flights.
Best time to fly IAH→LIS
Synthesised from 12-month price aggregates. Cheapest months in green, peak in red.
Estimated baseline. Prices update on a 30-day cadence as Travelpayouts data refreshes. Cheapest day-of-week typically Tuesday.
Houston to Lisbon FAQs
Direct flights from George Bush Intercontinental (IAH) to Lisbon (LIS) take approximately 10h 00m for the 4770-mile journey, plus 30–60 minutes of taxi, climb and descent. Total airport-to-airport time depends on cruise winds and air-traffic queueing on approach.
January is typically the cheapest month on this route, with one-way fares from $449. August is the peak — expect prices 2–3× higher. Book 4–8 weeks ahead for best fares; last-minute prices on this corridor rise sharply inside two weeks of departure.
8 carriers operate direct service from George Bush Intercontinental (IAH) to Lisbon (LIS): United Airlines, British Airways, Lufthansa, Air France, KLM and 3 more. Frequencies vary by season and carrier — United Airlines typically operates the highest weekly count on this corridor.
Visa-free Schengen for US passport holders up to 90 days in any 180-day period. Always check travel.state.gov for the latest entry requirements before booking.
Lisbon (LIS) is the primary international airport for Lisbon. Allow 30–60 minutes for the ground transfer by train, express bus, taxi or rideshare depending on traffic and time of day. See the airport's official website for current train and shuttle timetables.