$338 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 7/28. 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$985
Porto
Porto2 stops$730
Faro
Faro2 stops$873
Funchal
Funchal1 stop$1,027
Lisbon
Lisbon1 stop$985
Porto
Porto2 stops$730
Faro
Faro2 stops$873
Funchal
Funchal1 stop$1,027

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

Sun, Nov 8 - Fri, Nov 13
Multiple Airlines Logo
10:41 am - 7:40 am
IAH
-
OPO
14h 59m
2 stops
Multiple Airlines Logo
12:25 pm - 12:30 am
OPO
-
IAH
18h 05m
2 stops
$730Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
American Airlines Logo
4:45 pm - 4:00 pm
IAH
-
OPO
17h 15m
2 stops
American Airlines Logo
8:40 pm - 11:24 am
OPO
-
IAH
20h 44m
2 stops
$760American Airlines
Sun, Nov 8 - Mon, Nov 16
KLM Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
KLM Logo
11:15 am - 1:05 pm
OPO
-
IAH
31h 50m
1 stop
$768KLM
Sun, Nov 8 - Mon, Nov 16
KLM Logo
1:15 pm - 9:05 am
IAH
-
OPO
13h 50m
2 stops
KLM Logo
11:15 am - 1:05 pm
OPO
-
IAH
31h 50m
1 stop
$774KLM
Sun, Nov 8 - Sat, Nov 14
Delta Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
Delta Logo
11:15 am - 1:25 pm
OPO
-
IAH
32h 10m
1 stop
$818Delta
Sun, Nov 8 - Sun, Nov 15
Delta Logo
11:50 am - 10:30 am
IAH
-
OPO
16h 40m
2 stops
Delta Logo
5:00 am - 1:25 pm
OPO
-
IAH
14h 25m
1 stop
$823Delta
Tue, Aug 4 - Tue, Aug 11
United Airlines Logo
11:55 am - 10:30 am
IAH
-
LIS
16h 35m
1 stop
United Airlines Logo
1:00 pm - 10:01 pm
LIS
-
IAH
15h 01m
1 stop
$986United Airlines
Sun, Aug 2 - Tue, Aug 11
United Airlines Logo
7:20 am - 9:20 am
IAH
-
LIS
20h 00m
2 stops
United Airlines Logo
1:00 pm - 10:01 pm
LIS
-
IAH
15h 01m
1 stop
$989United Airlines
Sun, Jul 12 - Mon, Jul 20
British Airways Logo
9:10 pm - 10:05 am
IAH
-
LIS
30h 55m
1 stop
British Airways Logo
7:10 am - 1:25 pm
LIS
-
IAH
36h 15m
1 stop
$990British Airways
Mon, Jul 27 - Wed, Aug 12
British Airways Logo
9:10 pm - 11:20 am
IAH
-
FNC
32h 10m
1 stop
British Airways Logo
12:10 pm - 1:25 pm
FNC
-
IAH
31h 15m
1 stop
$1,027British 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 April, when tickets cost $467 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,110 and $762 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 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$338
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 23% lower on average.
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 8397 reviews
8.1Boarding
7.2Food
8.5Crew
7.8Entertainment
7.8Comfort
Airline reviews

Five hour delays every hour, I wish it were all at once

2.0 MediocreAnonymous, Jun 2026
MCO - LGA
Read more Delta reviews

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

As always, it’s a pleasure to travel with KLM. It is one of my favorite airlines.

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

It was really nice journey i personally recommend klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

I love Air France. This was another great experience despite a slight delay in the departure. The time was made up on flight. I would take AirFrance again when traveling to the far East. Merci beaucoup.

Everything is good except the seats are tightened no rooms for the legs,

The flight crew was exceptionally friendly and helpful. Also the seats were comfortable and roomier than many other airlines.

The plane's pilots, including the captain himself, thanked me for the flight. I know it's just marketing, but it was really nice to see these people. It's a great idea. Airplane food is never "good," but the entire crew and flight organization were top-notch. I really liked Delta, and I think I've traveled all over the world, and that was something new for me. Maybe even the old planes, the B767, but next time I have a choice, Delta will be my first choice. Thank you, a satisfied passenger :)

Middle seats SUCK!!!! I paid more money than I should have because of your terrible site Kayak.com. I'll try to use your competitors going forward. I am so disappointed you would play off business class.com as business class seats

They lost my bag and I still haven’t received it yet

They lost my bag and I still have not received it

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.

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Boarded early, left early, arrived 40 mins early! A win win for me!

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

We had a delay, but thankfully I made it to my connection. Overall it went smooth

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Thanks to a delay of an hour of my flight to Philadelphia on American Airlines I missed my connecting flight to Amsterdam. On arrival at Philadelphia he crew on the delayed flight did not ask the passengers to let connecting passengers get off first and I arrived a few minutes after boarding was closed at the original time for the flight to AMS, this despite the fact that I had received a message from American Airlines that departure was delayed by 25 minutes. Overall very poor service, no effort from the part of American Airlines to accommodate the passenger, just rebook the flight for the next day.

It's hard to tell where to plug in electronics, and the port on my seat didn't work. Their entertainment system was down. Vegetarian food options were tasty. Friendly, helpful flight attendants.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

The flight was ok. The seats are so small. The free wifi for members was not an option on this flight. The one flight attendant, older woman with straight white/grey hair, was very rude. The gentleman next to me asked about the wifi since he was a member as well. He stated, accurately, that the option to enter the idea number was not available. Her response was, "I don't know what to tell you" and walked away from him. The rest of the staff was wonderful. I asked another flight attendant about the wifi, she said the free wifi was not enabled on that flight (true or not- at least she was friendly). It was also pretty dirty. When I opened the tray table it had mushed crumbs and there was a dirty used pair of ear buds in my seat pocket. Lastly the air vent above my head was working but stuck so I was unable to move it to face me when it got warm. I fly American often but this really was not a great flight.

24 hour delays aren’t even heard in 3rd world countries with archaic transportation systems. I’m never flying American Airlines again.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

It was not British Air, we were put onto Air Portugal for our London to Lisbon leg.

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

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

Information on your arrival and departure airports