$333 Cheap Flights from Houston (IAH) to Lisbon (LIS)

Houston (IAH) to Lisbon (LIS) at a glance

Embark on an international long-haul journey from Houston (IAH) to Lisbon (LIS) with various airlines offering diverse route options. Evaluate choices from both full-service and low-cost carriers to discover the best itinerary that suits your budget, timetable, and travel plans while you explore Lisbon's iconic sights and vibrant neighborhoods. Check out the essential details for flights departing from George Bush Intercontinental Airport (IAH) to Humberto Delgado Airport (LIS).

• Fastest flight duration: around 10h 30m in-flight, plus roughly 2h 15m layover with one stop
• Route distance: roughly 4,800 miles (7,720 km)
• Flights per week: around 11 departures on average
• Typical fares (one-way): economy tickets often range from $275–$920, depending on seasonality and how far ahead you book

Flights from George Bush Intercontinental Airport (IAH) to Humberto Delgado Airport (LIS)

Based on the latest traveler bookings, here are the top airlines favored by passengers flying from Houston to Lisbon, especially for one-stop and multi-stop journeys. Popular layover options include Newark Liberty International Airport (EWR, approximately 2-hour layover), Heathrow Airport (LHR, around 2 hours and 30 minutes), and Washington Dulles International Airport (IAD, about 1 hour and 15 minutes). This variety allows you to tailor your trip by balancing price, total travel time, and cabin class to create the ideal itinerary.

• United: This comprehensive carrier provides one-stop service, with one-way ticket prices generally falling between $275 and $950. It accounts for about 53% of departures on this route, featuring an in-flight duration of 10 hours and 30 minutes, leading to a total travel time of approximately 13 hours and 30 minutes, including layovers.
• British Airways: As a full-service airline, British Airways offers one-stop flights, with one-way fares usually ranging from $275 to $720. It represents around 14% of the departures for this route, with a flight time of 10 hours and 30 minutes and a total journey duration of about 13 hours and 30 minutes, factoring in layovers.
• American Airlines: This full-service airline provides one-stop travel options, with one-way fares typically between $310 and $1,065. It makes up roughly 8% of the route's departures, featuring an in-flight time of 10 hours and 30 minutes and a total travel duration of around 13 hours and 30 minutes, including layovers.
• Delta: Delta offers both one-stop and multi-stop services as a full-service carrier, with one-way fares generally ranging from $280 to $925. It accounts for approximately 7% of departures for this route, with a usual in-flight time of 10 hours and 30 minutes, leading to a total journey time of roughly 13 hours and 30 minutes.
• Air Canada: This full-service airline provides both one-stop and multi-stop options, with one-way fares typically between $280 and $620. Air Canada represents about 4% of departures on this route, with a standard in-flight time of 10 hours and 30 minutes and a total travel time of approximately 13 hours and 30 minutes, including layovers.

Best time to fly from Houston (IAH) to Lisbon (LIS)

The most popular months for travelers flying from Houston to Lisbon are March, April, and June, when peak temperatures in Lisbon reach up to 68.2°F in June. If you prefer quieter travel, consider September, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 70.3°F. For better deals, January usually offers the lowest average one-way fare around $354. Flight availability peaks in March, with approximately 14 flights per week, making it easier to find convenient departure times. February, July, and October have the fewest flights, with approximately 9 flights per week.

• Cheapest time to fly: January usually offers good deals with average one-way fare around $354, roughly 37% cheaper than the yearly average.
• Another budget-friendly time to fly: February typically offers an average one-way fare of around $364.
• Most flight options: March has the highest number of flights from Houston to Lisbon, with approximately 14 flights per week, giving you more flexibility in scheduling your trip.

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Houston (IAH) to Lisbon (LIS)

• Houston to Lisbon (HOU-LIS): Located approximately 23 miles from George Bush Intercontinental Airport (IAH), William P. Hobby Airport (HOU) serves as a convenient departure point for this route.
• Houston to Cascais (HOU-CAT): William P. Hobby Airport (HOU), situated about 23 miles from George Bush Intercontinental Airport (IAH), connects to Cascais Airport (CAT), which lies roughly 12 miles from Humberto Delgado Airport (LIS).
• Houston to Beja (IAH-BYJ): Beja Airport (BYJ) is located around 81 miles from Humberto Delgado Airport (LIS), providing another option for travelers heading to this region.

How to find the best prices for flights from Houston (IAH) to Lisbon (LIS)

Getting some of the best deals on flights from Houston to Lisbon is all about timing and flexibility. Here are some key tips to help you save:

1. Best times to book and fly: cheaper fares are usually available when booking within two weeks, although most travelers tend to book at least two months in advance. Departures in the afternoon, from 12 PM to 6 PM, not only offer lower prices but are also the most popular times to fly. Additionally, flying on Wednesday provides both cheaper prices and is the busiest travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Lisbon hotel and flight deals.
4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Humberto Delgado Airport from George Bush Intercontinental Airport

Lisbon welcomes travelers from Houston with a range of transport options based on price, convenience, and proximity. Here's how to reach Lisbon efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Lisbon, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
• Car rental: Renting a car from Humberto Delgado Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Humberto Delgado Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Humberto Delgado Airport, travelers can easily access key transport links. Lisbon Airport Station, a metro station, is located about 0.1 miles from the airport and is reachable on foot, while Oriente Bus Station, a bus station, and Roma-Areeiro Station, a train station, are both about 1.8 miles away by car.

Houston to Lisbon Flights

The cheapest times to fly from Houston to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Houston to Lisbon are during the month of January. You can find some of the cheapest flights from Houston to Lisbon with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Houston to Lisbon

Sunday is one of the best days to book for cheap flights from Houston to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Houston to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Houston to Lisbon in 2026. You can also book with separate airlines for your outbound and return journeys, from $333 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Houston to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Houston to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.