$226 Find Cheap Flights from Houston George Bush Airport to Portugal

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 Portugal departing on 5/4. 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

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Cheap Flights from George Bush Intcntl to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$527
Porto
Porto1 stop$533
Faro
Faro1 stop$604
Funchal
Funchal1 stop$587
Lisbon
Lisbon1 stop$527
Porto
Porto1 stop$533
Faro
Faro1 stop$604
Funchal
Funchal1 stop$587

Book Cheap George Bush Intcntl to Portugal Plane Tickets

 
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 Portugal 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 Portugal

Mon, Mar 9 - Mon, Mar 16
Lufthansa Logo
5:30 pm - 10:50 pm
IAH
-
LIS
24h 20m
1 stop
Lufthansa Logo
12:25 pm - 3:10 pm
LIS
-
IAH
31h 45m
1 stop
$527Lufthansa
Thu, Feb 26 - Wed, Mar 11
Lufthansa Logo
4:50 pm - 1:20 pm
IAH
-
LIS
14h 30m
1 stop
Lufthansa Logo
5:00 am - 7:15 pm
LIS
-
IAH
19h 15m
1 stop
$529Lufthansa
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
1:25 pm - 8:10 am
IAH
-
LIS
12h 45m
1 stop
United Airlines Logo
5:00 am - 6:15 pm
LIS
-
IAH
19h 15m
1 stop
$534United Airlines
Sun, Feb 22 - Sat, Mar 7
United Airlines Logo
6:30 am - 8:10 am
IAH
-
LIS
19h 40m
1 stop
United Airlines Logo
5:00 am - 6:15 pm
LIS
-
IAH
19h 15m
1 stop
$535United Airlines
Sat, Apr 18 - Sun, Apr 26
Delta Logo
12:38 pm - 8:00 am
IAH
-
LIS
13h 22m
1 stop
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$536Delta
Mon, Feb 23 - Wed, Mar 11
KLM Logo
12:42 pm - 8:00 am
IAH
-
LIS
13h 18m
2 stops
KLM Logo
3:30 pm - 2:30 pm
LIS
-
IAH
28h 00m
1 stop
$538KLM
Sun, Apr 19 - Fri, May 1
Delta Logo
5:20 am - 8:00 am
IAH
-
LIS
20h 40m
2 stops
Delta Logo
11:55 am - 1:15 pm
LIS
-
IAH
31h 20m
1 stop
$541Delta
Wed, Mar 11 - Wed, Mar 18
KLM Logo
4:30 pm - 6:30 pm
IAH
-
LIS
21h 00m
1 stop
KLM Logo
3:30 pm - 2:30 pm
LIS
-
IAH
28h 00m
1 stop
$542KLM
Mon, Feb 23 - Mon, Mar 2
British Airways Logo
3:50 pm - 2:15 pm
IAH
-
FNC
16h 25m
1 stop
British Airways Logo
5:05 pm - 2:05 pm
FNC
-
IAH
27h 00m
1 stop
$587British Airways
Mon, Feb 23 - Mon, Mar 2
British Airways Logo
1:01 pm - 2:15 pm
IAH
-
FNC
19h 14m
2 stops
British Airways Logo
5:05 pm - 2:05 pm
FNC
-
IAH
27h 00m
1 stop
$594British Airways
Booking Insights

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

Get data-powered insights and trends into flights from George Bush Intcntl to Portugal 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 Portugal?

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 Portugal, 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 Portugal is November, when tickets cost $631 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,192 and $978 respectively.

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

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 Portugal, 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 Portugal, you should book around 2 weeks before departure, which saves you about 31% 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$226
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 36% increase in price.
Flight from Houston George Bush Airport to Porto

FAQs - booking Portugal flights

  • Is it necessary to get a visa before flying to Portugal from Houston?

    Because Portugal is a member of the Schengen area, there is no need to get a visa to travel here so long as you don't plan on staying in the country for more than 90 days. One of the benefits of Portugal being a member of this area is that you can travel to any other country in the area without having to obtain a new visa to travel.

  • What are some of the child car seat laws I should know about before I start driving after my arrival in Portugal?

    When you drive with kids in Portugal, they must travel in a car seat facing to the rear until they are 15 months old, and then one that faces forward until they are four years old. After that, children must travel in a booster seat until they reach the age of 12, weigh more than 79 pounds, or have a height greater than 53 in.

  • Is George Bush Intercontinental Airport a hub for any airline?

    George Bush Intercontinental Airport is a major hub for United Airlines. It serves as one of United's key hubs, facilitating numerous domestic and international flights for the airline. What this means for travelers making their way to Portugal on this airline is that you will find a number of different flight options, which can be especially beneficial if there are any problems or issues with your original flight.

  • What are some reasons to upgrade to First Class when traveling aboard American Airlines from Houston to Portugal?

    Upgrade to First Class on American Airlines for your Houston to Portugal flight for a luxurious journey. Enjoy spacious seating, fully flat beds, and gourmet dining. Benefit from personalized service, priority boarding, and access to exclusive lounges. The enhanced in-flight entertainment system and increased baggage allowance ensure a comfortable and indulgent travel experience for the long-haul flight to Portugal.

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

    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 Portugal.

  • 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 Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Houston George Bush Airport to Portugal 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 Portugal?

    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 from Houston George Bush Airport to Portugal with an airline and back with another airline.

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

    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 from Houston George Bush Airport to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Portugal

  • One of the most common airport destinations when traveling to Portugal is Humberto Delgado Airport (LIS). When leaving from George Bush Intercontinental Airport (IAH), American Airlines offers a one-stop flight that has a layover at Philadelphia International Airport (PHL), while United Airlines offers a one-stop flight that has a layover at Newark Liberty International Airport (EWR).
  • When you are trying to make your way to the Francisco Sá Carneiro Airport (OPO) from George Bush Intercontinental Airport, both Delta and KLM offer flights with one stop at Amsterdam Airport Schiphol (AMS).
  • Travelers leaving George Bush Intercontinental Airport early in the morning for a flight to Portugal might want to consider staying the night at the Houston Airport Marriott at George Bush Intercontinental, which offers access to all three terminals at the airport through an underground tram.
  • If you are looking for the best way to get to Faro International Airport (FAO) from George Bush Intercontinental Airport, United Airlines offers a one-stop flight here that has a layover at Newark International Airport.
  • When traveling aboard United Airlines from George Bush Intercontinental Airport, a great place to wait for your flight is inside one of the four United Club locations you'll find at this airport.

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

 
Need help choosing which airline to fly with from George Bush Intcntl to Portugal? 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 8121 reviews
7.2Food
8.5Crew
7.8Entertainment
7.9Comfort
8.1Boarding
Airline reviews

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.

10.0 ExcellentZebrina, Jan 2026
LGA - CAE
Read more Delta reviews

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.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

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

Food was really mediocre for premium economy in comparison to other airlines… the crew was nowhere to be found… 14 hour flight…

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.

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!!

It was a great experience. The only thing I would have changed was that the bathrooms were never cleaned and they got very dirty.

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.

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

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

The flight from SFO to YVR was delayed and my bag did not make it to my next flight from YVR to SYD. It took almost 3 days after I landed to get my bag and when I got it, it was filled with dust

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

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

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

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

Everything you need to know for your flight from George Bush Intcntl to Portugal

Information on your arrival and departure airports