IAH - LIS

$316 Find Cheap Flights from Houston George Bush Airport to Lisbon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from George Bush Intcntl to Lisbon departing on 5/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Lisbon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Lisbon.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Lisbon.
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Everything you should know

Cheapest round-trip
$523
Overall average: $709
Lufthansa
Thu 3/19Wed 4/1
IAH - LIS • 1 stop
Cheapest one-way
$316
Typical prices: $394-$662
Multiple Airlines
Thu 5/21
IAH - LIS • 2 stops
Top airlines
Lufthansa
Cheapest • from $523 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 24% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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We hope you love your trip to Lisbon!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from George Bush Intcntl to Lisbon (IAH-LIS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from George Bush Intcntl to Lisbon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from George Bush Intcntl to Lisbon

Thu, Mar 19 - Wed, Apr 1
Lufthansa Logo
5:30 pm - 10:50 pm
IAH
-
LIS
24h 20m
1 stop
Lufthansa Logo
4:25 pm - 1:35 pm
LIS
-
IAH
27h 10m
1 stop
$523Lufthansa
Thu, Mar 19 - Wed, Apr 1
United Airlines Logo
7:25 am - 10:15 am
IAH
-
LIS
21h 50m
1 stop
United Airlines Logo
5:05 am - 6:00 pm
LIS
-
IAH
18h 55m
1 stop
$530United Airlines
Mon, Mar 16 - Tue, Mar 31
Lufthansa Logo
5:30 pm - 10:50 pm
IAH
-
LIS
24h 20m
1 stop
Lufthansa Logo
4:20 pm - 1:35 pm
LIS
-
IAH
27h 15m
1 stop
$532Lufthansa
Tue, Apr 21 - Wed, May 6
United Airlines Logo
7:25 am - 10:30 am
IAH
-
LIS
21h 05m
1 stop
United Airlines Logo
5:05 am - 6:00 pm
LIS
-
IAH
18h 55m
1 stop
$535United Airlines
Sun, Apr 26 - Wed, May 6
Delta Logo
3:50 pm - 2:55 pm
IAH
-
LIS
17h 05m
1 stop
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$536Delta
Tue, Apr 7 - Mon, Apr 13
Delta Logo
3:50 pm - 2:55 pm
IAH
-
LIS
17h 05m
1 stop
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$537Delta
Wed, Apr 8 - Thu, Apr 16
United Airlines Logo
7:30 am - 9:20 am
IAH
-
LIS
19h 50m
2 stops
United Airlines Logo
5:05 am - 6:00 pm
LIS
-
IAH
18h 55m
1 stop
$538United Airlines
Tue, Mar 17 - Thu, Apr 2
United Airlines Logo
9:45 am - 8:10 am
IAH
-
LIS
17h 25m
2 stops
United Airlines Logo
7:25 am - 6:00 pm
LIS
-
IAH
16h 35m
1 stop
$540United Airlines
Wed, Apr 29 - Sat, May 9
Delta Logo
3:20 pm - 6:45 pm
IAH
-
LIS
21h 25m
1 stop
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$541Delta
Mon, Mar 16 - Wed, Apr 1
Delta Logo
7:05 am - 8:00 am
IAH
-
LIS
19h 55m
2 stops
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$542Delta
Booking Insights

KAYAK's insights & trends for George Bush Intcntl to Lisbon flights

Get data-powered insights and trends into flights from George Bush Intcntl to Lisbon to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Houston George Bush Intcntl Airport to Lisbon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston George Bush Intcntl Airport to Lisbon, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Houston George Bush Intcntl Airport to Lisbon is November, where tickets cost $631 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,193 and $978 respectively.

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Lisbon?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Houston George Bush Intcntl Airport to Lisbon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Houston George Bush Intcntl Airport to Lisbon, you should book around 2 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$316
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 43% increase in price.
Flight from Houston George Bush Airport to Lisbon

When to book flights from George Bush Intcntl to Lisbon

Are your dates flexible? Find out the best times to travel from George Bush Intcntl to Lisbon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Houston George Bush Airport to Lisbon flights

  • Does LIS Airport have any currency exchanges?

    As you arrive in Lisbon, you will need to exchange your currency for euros to allow easier transactions while in Portugal. LIS Airport has a few currency exchanges where you can get these services. Unicambios Currency Exchange has a desk at the arrivals desk, at the entrance to the South Pier, at the baggage claim desk, and in the Lisbon Airport Underground Station.

  • Is public transport available from LIS Airport to the city center?

    As is the case with a majority of European cities, Lisbon is well connected to a public transport system that allows the locals to move from one point to another with ease. Humberto Delgado Airport has a subway station with a line connecting directly to the city center. This is one of the cheapest ways to get to the city center. However, if you would rather go for convenience, taking a taxi would be a better idea since they will drop you off at any destination you want.

  • How far is IAH from downtown Houston?

    George Bush Intercontinental Airport is about two miles away from downtown Houston meaning travelers have to deal with a conveniently short commute to the airport. This gives you multiple options since you can either take a taxi or use the metro to get to the airport. In terms of convenience, a taxi is the best option since they will pick you up wherever you are and drop you off at the airport, right outside the terminal buildings.

  • How can I get cheaper flight tickets?

    You can save a few dollars on flight tickets by booking your tickets a month or two in advance. by booking this early, you will be able to avoid the price hikes that usually happen as the date of travel approaches. You should also consider booking connecting flights instead of one direct flight if possible. this is because most airlines usually charge higher prices for the convenience of flying directly.

  • What is the cheapest flight from Houston George Bush Intcntl Airport to Lisbon?

    In the last 3 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Lisbon was $316 for a one-way ticket and $523 for a round-trip.

  • Do I need a passport to fly between Houston George Bush Airport and Lisbon?

    Yes, you’ll need a passport to travel to Lisbon from Houston George Bush Airport.

  • Which aircraft models fly most regularly from Houston George Bush Airport to Lisbon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Houston George Bush Airport to Lisbon?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Houston George Bush Airport and Lisbon, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Lisbon from Houston George Bush Airport?

    London is the most popular layover city among KAYAK users traveling from Houston George Bush Airport to Lisbon.

  • Which is the best airline for flights from Houston to Lisbon, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Houston to Lisbon are Delta and KLM. With an average price for the route of $756 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,120 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from Houston George Bush Airport to Lisbon?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Houston George Bush Airport to Lisbon.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Houston George Bush Airport to Lisbon?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Lisbon from Houston George Bush Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Houston George Bush Airport to Lisbon?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Lisbon with an airline and back to Houston George Bush Airport with another airline. Booking your flights between Houston George Bush Airport and LIS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston George Bush Airport to Lisbon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Lisbon from Houston George Bush Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Houston George Bush Intcntl Airport to Lisbon

  • When flying out of George Bush Intercontinental Airport (IAH), ensure you arrive at the airport at least 3 hours before your departure time. Arriving this early gives you enough time to navigate the long security queues and ensures that you are ready for boarding once the gates open.
  • If you plan to leave your car at IAH, consider the offsite parking lots instead of using airport parking. Offsite parking is usually significantly cheaper than airport parking and you could end up saving up to fifty percent.
  • Traveling mums will be happy to hear that Humberto Delgado Airport (LIS) has multiple baby care facilities all over Terminals 1 and 2. These rooms feature a range of amenities that include changing tables, sinks, countertops, and electric outlets.
  • When flying out of IAH, you should consider staying at Houston Airport Marriott at George Bush Intercontinental the night before. This hotel is conveniently located at the airport thus eliminating the need for a long airport commute. It also is connected to all terminals via an underground tram service meaning you’re almost guaranteed to arrive on time.
  • Air France, KLM, American Airlines, and United Airlines each have a lounge at George Bush Intercontinental Airport. You should therefore consider booking your flight with one of these airlines to enjoy the lounge facilities before your flight.

Reviews of the top 5 airlines serving from George Bush Intcntl to Lisbon

 
See real verified KAYAK customer reviews for airlines flying from Houston to Lisbon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from George Bush Intcntl to Lisbon? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8162 reviews
8.1Boarding
7.2Food
7.8Entertainment
8.5Crew
7.9Comfort
Airline reviews

Got on the plane and sat there for an hour before departure.

4.0 OkayMatthew, Feb 2026
DTW - MDW
Read more Delta reviews

Got on the plane and sat there for an hour before departure.

Second flight in a row where the entertainment system is broken. 5 hour long flight with no entertainment and flight attendants did not seem interested in resolving the matter. Very shocked to be treated this poorly considering I paid for a first class experience and have Diamond Medallion status.

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

It was nt delta. It was aeromexo. Service was awful. They served a very small drink and NO snack for a 3hr and 35min flight. Then for the first 30 min of the flight is was talk and talk over head interruption the movie/ show i picked to watch.

Comfort seating was on the tight side. Maybe it was a smaller plane(?)

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

Communication on the delay, rebooking and how to get a hotel was poor. Mails, airport check-in and transfer desk said different things.

Not consistent with the food quality (I mean taste not freshness)

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

Worst airlines either. First leg was delayed because of crew not available. My connection was missed so they booked me automatically the next day! But, impossible to get anyone on site, web site does not let me access my reservation anymore, confirmed by useless agents over the phone. My 2-leg trip with part in business class arriving at 4:10pm ends up in an awful 3-leg arriving at 9pm the next day with no way to even choose the seats and of course at the very end of the plane. I can understand problems arrive but the way Air France handle it is just unacceptable. You are on your own. Apparently getting you to your destination is the only thing they consider their duty. The customer experience and fatigue is none of their concern. And I have a status with them. I will reconsider my priorities when flying with Air France and encourage everyone to do the same.

Our flight crew were terrific. And they handle a difficult passenger with finesse.

Excellent, Lima to Paris. But Paris to Amsterdam, delayed, missed my flight and KLM treated its missed flights passengers very badly, terribly bad. No hotel accommodation given. Passengers were told to find their own hotel accommodation and claim at reasonable rate and left the booth and literally with armed Police Officers listening to passengers complains. For three hours, after moving by Uber from hotel to hotel and calling and booking online, no hotel was available. I had to return to the airport and seat/sleep on the benches, suffering the cold, and rats running around until my new allocated flight the next day. It was the most terrible KLM treatment even seen and being a Business Class passenger. Still mentally suffering to date as a result.

3 hour delay but out of their control. App said I get vouchers but when I applied for them, they were nowhere to be found in my account

I bought business class tickets but the seats are exactly like economy with no comfort seats nor an empty seat next to me provided. Very poor, low quality airline.

I don't understand the concept of paying to get your personal luggage onboard and then asked to check it in.... either sell the space or don't, its a hassle to carry those all through the airport just to make a check in at the last minute.

The food was great and the service and attitude was amazing!!

I like flying first class, and United has a nice one

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

Again, we were rerouted all the way to Zurich and had a longer journey than expected.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Boarding was so so after zone 3 was called all other zones went in

Air Canada is my new fave airline..I plan to use when I can. No complaints at all just rave compliments for the staff and airline.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

Our Jackson, Mississippi to Dallas Fort Worth flight was delayed on 1/19/26.. This was changed to Jackson to Charlotte in the last minute because of this delay. This started some kind of disconnect between American Airlines and British Airways bookings. We could not go past the passport control in London Heathrow. I had to go to the counter and waited for more than 30 minutes to get a new boarding pass. Problems did not end there. Somehow our entire return flight was canceled by someone. I had to make several phone calls over several days to fix the problem – this was not easy from India. Looks like there was some kind of disconnect between two airlines or some agent did not do it right. I’m anxious to know what went wrong.

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Getting the boarding passes between the BA and AA apps was very clunky.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

Horrible leg room - coach seating with empty seat in middle on a 3 across seating. You buy business class for comfort which includes leg room. Absolutely no entertainment options either. Awful experience

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

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