$266 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 9/30. 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.
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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$577
Porto
Porto1 stop$640
Faro
Faro3 stops$746
Funchal
Funchal1 stop$831
Lisbon
Lisbon1 stop$577
Porto
Porto1 stop$640
Faro
Faro3 stops$746
Funchal
Funchal1 stop$831

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

Tue, Nov 11 - Thu, Dec 4
United Airlines Logo
11:50 am - 9:20 amIAH-LIS
15h 30m1 stop
United Airlines Logo
10:55 am - 6:55 pmLIS-IAH
38h 00m2 stops
$577United Airlines
Find Deal
Tue, Nov 11 - Thu, Dec 4
United Airlines Logo
10:13 am - 9:20 amIAH-LIS
17h 07m2 stops
United Airlines Logo
10:55 am - 5:23 pmLIS-IAH
36h 28m2 stops
$581United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
Air Canada Logo
7:10 am - 9:20 amIAH-LIS
20h 10m2 stops
Air Canada Logo
5:00 am - 9:44 pmLIS-IAH
22h 44m2 stops
$596Air Canada
Find Deal
Mon, Oct 27 - Tue, Nov 4
Air Canada Logo
7:10 am - 9:20 amIAH-LIS
21h 10m1 stop
Air Canada Logo
5:00 am - 9:44 pmLIS-IAH
22h 44m2 stops
$597Air Canada
Find Deal
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
3:50 pm - 12:10 pmIAH-LIS
14h 20m1 stop
British Airways Logo
11:05 am - 9:35 pmLIS-IAH
16h 30m1 stop
$598British Airways
Find Deal
Wed, Jan 21 - Wed, Jan 28
British Airways Logo
5:18 pm - 5:40 pmIAH-LIS
18h 22m2 stops
British Airways Logo
6:30 am - 9:35 pmLIS-IAH
21h 05m2 stops
$608British Airways
Find Deal
Tue, Nov 4 - Fri, Nov 14
Delta Logo
12:55 pm - 3:10 pmIAH-LIS
20h 15m2 stops
Delta Logo
5:30 am - 1:55 pmLIS-IAH
14h 25m1 stop
$625Delta
Find Deal
Tue, Oct 21 - Sun, Nov 2
Delta Logo
12:55 pm - 2:50 pmIAH-LIS
19h 55m2 stops
Delta Logo
5:30 am - 2:55 pmLIS-IAH
14h 25m1 stop
$674Delta
Find Deal
Mon, Aug 18 - Wed, Sep 3
KLM Logo
3:30 pm - 9:35 amIAH-FNC
36h 05m1 stop
KLM Logo
10:20 am - 1:15 pmFNC-IAH
32h 55m1 stop
$831KLM
Find Deal
Mon, Aug 18 - Wed, Sep 3
KLM Logo
5:17 pm - 6:55 pmIAH-FNC
19h 38m2 stops
KLM Logo
10:20 am - 1:15 pmFNC-IAH
32h 55m1 stop
$836KLM
Find Deal
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 February, when tickets cost $595 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,181 and $1,006 respectively.

What’s the cheapest day of the week to fly from Houston George Bush Airport to Portugal?

The average price of all round-trip flights from Houston George Bush Intcntl Airport to Portugal clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Portugal on a Tuesday and more expensive on a Friday. On your return trip to Houston George Bush Airport, you should consider flying back on a Tuesday, and avoid Thursdays for better deals.

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 4 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.


Good to know

Low seasonJanuary
Cheapest flight$266
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 41% increase in price.
Flight from Houston George Bush Airport to Lisbon

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.

  • What is the cheapest time of day to fly to Portugal?

    The cheapest time of day to fly to Portugal is generally at night, when round-trip flights cost $963 on average. Morning departures are around 3% cheaper than evening flights, on average. The most expensive time of day to fly to Portugal is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,106.

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.
8.0
DeltaOverall score based on 7981 reviews
7.9Comfort
8.5Crew
8.2Boarding
7.9Entertainment
7.3Food
Airline reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

2.0 MediocreGim, Jul 2025BGM - DTW
Read more Delta reviews

My experience on any Delta flight is always overshadowed by the time Delta removed me from a flight for no apparent reason.

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

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.

Overall it was good. I missed my connection but I was put on another flight.

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

My suitcase was completed destroyed. The top part is broken and unusable now.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

My priority checked bag was not loaded on the flight. I had to sit in baggage claim in Las Vegas for 2 1/2 hours waiting for the next flight. All baggage staff were very helpful, tracking showed it as scanned for loading. Nobody told me why it wasn't on my flight.

All male crew was just too woke for me. I felt like a sardine. I will never take a window seat or the rearmost seat again. I booked early and did not pay for seat selection and that was a mistake. The security at IAH was atrocious. I was violated and radiated as I was in a hurry to connect to my other flight. I may have lost items under the seat in front of me that I couldn't see nor bend over to look.

Both flights are delayed so I rate the whole experience as mediocre.

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I had a good experience. I liked being informed about the status of my luggage

Very bad service the way back we was on the way for r two days very bad condition and waiting for luggage till now

I was forcefully re-routed to another destination and was delayed a total of 8hours. I have still not received my bags, no one is taking responsibility. The agents at the airport lied to me that I will get to my destination same time as my previous flight where I was forcefully re-routed from.

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

United had no (zero) record of our flight. It took over an hour of us standing in line with surly employee while others waited to get resolved. I have never experienced such poor service and poor empathy.

Or the greatest and it ended up picking us up from Chicago to Toronto not sure who was tesponsible for the 4 hr delay. United should have been properly prepared for a scheduled flight from Austin to Chicago and they were not.

Crew was pleasant and efficient. The speaker system for instructions was hard to understand

Flight was delayed. Though I checked in with BA live chat three times, our special meals were not provided.

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

Old tired plane, Uncomfortable business class seat. Breakfast dreadful and meagre. At least flight was on time!

Safe arrival. Improvement on Time efficiency Effective Communication will be great.

The crew is very friendly and helpful. The food is good for airplane food. The flight is long and hard to sleep. The leg space is great. The plane arrived in plenty of time.

A good flight back to Tampa and thankfully although we had a 90 minute delay because of thunder storms from Charlotte to bottom iof Florida, it was a prudent to avoid these for a comfortable flight as opposed to being tossed around with turbulence.

They removed our booking without telling us. Cost us thousands to book last minute

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

The on flight entertainment system touch screen system and the USB charger did not work on multiple seats on least 4 seats an in different rows. The attendant tried to reset the system but was un successful. I couldn't change my phone to get my ticket for my next flight. This was an international flight I changed seats and the problem was the same. the flight attendant offered his power bank

Captain sick. Unable to get replacement so delayed me 30 hours, many others delayed 54 hours. TOTALLY DESTROYED ALL MY PLANS, including lost my rental car which would now cost over 5 times what I paid so stuck with buses n trains... lost hotel reservations.... HORRIBLE!!!

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