$389 Find Cheap Flights from Portugal to Houston

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Houston departing on 9/9. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Houston, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Houston, as well as popular online travel agencies
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Cheap Flights from Portugal to Houston

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to Houston 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 Portugal to Houston

Sat, Sep 6 - Fri, Sep 19
 Logo
10:35 am - 9:07 pmLIS-IAH
16h 32m1 stop
 Logo
6:59 pm - 11:25 pmIAH-LIS
46h 26m2 stops
Thu, Aug 28 - Wed, Sep 10
 Logo
10:35 am - 8:18 pmLIS-IAH
15h 43m1 stop
 Logo
12:58 pm - 9:20 pmIAH-LIS
26h 22m2 stops
Sat, Sep 6 - Fri, Sep 19
 Logo
10:35 am - 9:07 pmLIS-IAH
16h 32m1 stop
 Logo
12:58 pm - 8:15 pmIAH-LIS
49h 17m2 stops
Mon, Sep 15 - Mon, Sep 22
Delta Logo
5:00 am - 1:15 pmLIS-IAH
14h 15m1 stop
Delta Logo
3:50 pm - 5:50 pmIAH-LIS
20h 00m1 stop
$773Delta
Find Deal
Mon, Sep 15 - Mon, Sep 22
Delta Logo
5:00 am - 4:27 pmLIS-IAH
17h 27m2 stops
Delta Logo
11:30 am - 2:50 pmIAH-LIS
21h 20m2 stops
$778Delta
Find Deal
Mon, Jan 19 - Sun, Jan 25
KLM Logo
11:25 am - 11:59 pmLIS-IAH
18h 34m2 stops
KLM Logo
12:30 pm - 10:35 amIAH-LIS
16h 05m2 stops
$789KLM
Find Deal
Sat, Jan 17 - Thu, Jan 22
British Airways Logo
10:30 am - 9:35 pmLIS-IAH
17h 05m1 stop
British Airways Logo
4:30 pm - 6:00 pmIAH-LIS
19h 30m2 stops
$792British Airways
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Tue, Jan 20 - Mon, Jan 26
British Airways Logo
7:05 am - 8:05 pmLIS-HOU
19h 00m2 stops
British Airways Logo
4:24 pm - 2:55 pmHOU-LIS
16h 31m2 stops
$803British Airways
Find Deal
Tue, Jan 20 - Fri, Jan 23
United Airlines Logo
10:15 am - 6:44 pmLIS-IAH
14h 29m1 stop
United Airlines Logo
2:30 pm - 8:10 amIAH-LIS
11h 40m1 stop
$942United Airlines
Find Deal
Tue, Jan 20 - Fri, Jan 23
KLM Logo
5:00 am - 5:43 pmLIS-IAH
18h 43m2 stops
KLM Logo
12:55 pm - 8:00 amIAH-LIS
13h 05m1 stop
$951KLM
Find Deal
Booking Insights

KAYAK's insights & trends for flights to Houston

Get data-powered insights and trends for flights to Houston to help you find the cheapest flights, the best time to fly and much more.

Which is the cheapest airport to fly into in Houston?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Houston is Houston Hobby Airport (HOU), with an average flight price of $248.


Good to know

Cheapest flight$389
Flight from Lisbon to Houston George Bush Airport

FAQs - booking Houston flights

  • Which Houston airport is closest to central Houston?

    Out of the 2 airports in Houston, Houston Hobby Airport is the nearest to the city center (9 miles). You'll travel 16 miles to reach the center of Houston if you land in Houston George Bush Airport

  • What is the cheapest day to fly to Houston?

    Based on KAYAK data, the cheapest day to fly to Houston is Saturday where round-trip tickets can be as cheap as $792. On the other hand, the most expensive day to fly is Thursday, where round-trip prices are $1,376 on average.

  • How does KAYAK find such low prices on flights to Houston?

    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 to Houston.

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

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

  • What is the Hacker Fare option on flights to Houston?

    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 Houston 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 to Houston?

    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 Houston 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 Houston?

    The cheapest time of day to fly to Houston is generally at night, when round-trip flights cost $790 on average. The most expensive time of day to fly to Houston is generally in the morning, which is peak travel time and where the average cost of a ticket is $902.

  • How many direct flights to Houston are there each week?

    Each week there are around 5,799 direct flights from within Portugal to Houston. The most common day for departures is Sunday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Houston

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Houston flight deals.

Reviews of the top airlines flying from Portugal to Houston

 
See real verified KAYAK customer reviews for airlines flying to Houston. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Houston. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Houston? 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.
7.4
United AirlinesOverall score based on 8904 reviews
7.1Entertainment
7.3Comfort
7.7Boarding
6.6Food
8.1Crew
Airline reviews

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

10.0 ExcellentEmily, Jul 2025LAX - IAH
Read more United Airlines reviews

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

The woman gate agent in Phoenix was none too sympathetic about my check-in process as I am relatively new with using apps. I almost did not get on because she said I did not check-in. I thought I had via Kayak where I purchased a very expensive ticket. Lesson learned but to be told I may not get on as a matter of factly was difficult to hear.

Flight was on time. Boarding was smooth. Flight attendants were friendly and efficient. Entertainment system was broken for all passengers on the left side of the aisle. I would prefer if meals were not served on red eye flights. No one should need to dine at that time and it is disturbing for those passengers trying to sleep.

Gate agent did not hold flight for connection, provided no assistance to get new flight

I always appreciate when everything is on time! In this flight you have a short connection and it could be stressful , but is was easy and fast. They even ask people to wait so the ones that have a short connection could leave before. It was the fist time that something like this happened.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

My suitcase was destroyed. The top part where the handle is is completed broken. And unusable now.

Since when do I have to pay for my checked bag? I have a United Explorer mileage plus silver card and I was charged for my checked bags. This also is an international flight. So I would like an explanation to be clear before I choose an airline please?

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

Everything about the flight check-in was smooth no line the plane is clean and bathroom

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

I was put into business class. Wow! My flight attendant was great! The food amazing’

The gate at London Gatwick had confusing signs for the different zones and the staff seemed harried because people didn't know when it was their turn to come to the desk. Plus, with there were too many carry-on bag travelers, myself included. The charge scheme for checking bags is frustrating. If you travel light, you want the freedom to leave as soon as you deplane. When you are forced to gate-check your bag simply because the flight is fully booked, you lose whatever time you'd hoped to save because you're still stuck waiting for your bag to come off the conveyor belt.

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

Not so good with their baggage handling as they damaged one of my check in luggage

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.

All went well on the flight, not happy of course with having to pay for a seat and in hold luggage of £50

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

Everything you need to know for your flight to Houston

Cabin class types available on flights to Houston

Cabin classes available on flights to Houston. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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