IAH - OPO

$382 Find Cheap Flights from Houston George Bush Airport to Porto

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 Porto departing on 4/26. 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 Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Porto, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$654
Turkish Airlines
Tue 4/7Tue 4/14
IAH - OPO • 1 stop
Cheapest one-way
$346
Multiple Airlines
Sun 4/26
IAH - OPO • 2 stops
Top airlines
Cheapest • from $654 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between George Bush Intcntl and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $1,047 (round-trip)
Shortest trip • 12h 36m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from George Bush Intcntl to Porto (IAH-OPO)

 
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 Porto 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 Porto

Tue, Apr 7 - Tue, Apr 14
Turkish Airlines Logo
9:05 pm - 11:30 pm
IAH
-
OPO
20h 25m
1 stop
Turkish Airlines Logo
4:50 pm - 12:45 pm
OPO
-
IAH
25h 55m
1 stop
$654Turkish Airlines
Tue, Apr 28 - Tue, May 5
KLM Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
KLM Logo
11:30 am - 1:15 pm
OPO
-
IAH
31h 45m
1 stop
$669KLM
Mon, May 4 - Wed, May 20
Turkish Airlines Logo
9:05 pm - 9:45 am
IAH
-
OPO
30h 40m
1 stop
Turkish Airlines Logo
4:40 pm - 7:10 pm
OPO
-
IAH
32h 30m
1 stop
$675Turkish Airlines
Mon, Apr 27 - Wed, May 13
Turkish Airlines Logo
2:30 pm - 3:50 pm
IAH
-
OPO
19h 20m
1 stop
Turkish Airlines Logo
4:40 pm - 7:10 pm
OPO
-
IAH
32h 30m
1 stop
$677Turkish Airlines
Tue, Apr 28 - Tue, May 5
Delta Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Delta Logo
5:00 am - 6:34 pm
OPO
-
IAH
19h 34m
2 stops
$678Delta
Tue, Apr 7 - Tue, Apr 14
KLM Logo
3:20 pm - 3:30 pm
IAH
-
OPO
18h 10m
1 stop
KLM Logo
11:30 am - 11:59 pm
OPO
-
IAH
18h 29m
2 stops
$684KLM
Mon, May 4 - Mon, May 11
Turkish Airlines Logo
2:30 pm - 3:50 pm
IAH
-
OPO
19h 20m
1 stop
Turkish Airlines Logo
10:40 am - 7:10 pm
OPO
-
IAH
38h 30m
1 stop
$690Turkish Airlines
Thu, Apr 2 - Fri, Apr 10
Turkish Airlines Logo
9:05 pm - 11:30 pm
IAH
-
OPO
20h 25m
1 stop
Turkish Airlines Logo
10:40 am - 7:10 pm
OPO
-
IAH
38h 30m
1 stop
$698Turkish Airlines
Sun, Mar 29 - Sun, Apr 19
Turkish Airlines Logo
9:05 pm - 9:40 am
IAH
-
OPO
30h 35m
1 stop
Turkish Airlines Logo
10:45 am - 12:45 pm
OPO
-
IAH
32h 00m
1 stop
$709Turkish Airlines
Tue, Apr 7 - Tue, Apr 14
British Airways Logo
4:42 pm - 7:30 pm
IAH
-
OPO
20h 48m
2 stops
British Airways Logo
12:25 pm - 8:20 am
OPO
-
IAH
25h 55m
2 stops
$712British Airways
Booking Insights

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

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

Which airlines provide the cheapest flights from Houston George Bush Airport to Porto?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Houston George Bush Airport to Porto were found on Turkish Airlines ($654) and KLM ($669).

Good to know

Low seasonNovember
Cheapest flight$346
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from Houston George Bush Airport to Porto

When to book flights from George Bush Intcntl to Porto

Are your dates flexible? Find out the best times to travel from George Bush Intcntl to Porto 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 Porto flights

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

    In the last 3 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Porto was $346 for a one-way ticket and $654 for a round-trip.

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

    A passport is required to fly from Houston George Bush Airport to Porto.

  • Which airports will I be using when flying from Houston George Bush Airport to Porto?

    Houston George Bush Airport and Porto are both served by 1 main airport. You will leave Houston George Bush Airport from Houston George Bush Intcntl and will be arriving at Porto.

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

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

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

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

  • Which is the best airline for flights from Houston to Porto, KLM or United Airlines?

    The two airlines most popular with KAYAK users for flights from Houston to Porto are KLM and United Airlines. With an average price for the route of $755 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,073 and an overall rating of 7.4.

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

    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 Porto.

  • 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 Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto 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 Porto?

    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 Porto with an airline and back to Houston George Bush Airport with another airline. Booking your flights between Houston George Bush Airport and OPO 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 Porto?

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

Reviews of the top 3 airlines serving from George Bush Intcntl to Porto

 
See real verified KAYAK customer reviews for airlines flying from Houston to Porto. 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 Porto? 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.
7.8
KLMOverall score based on 1471 reviews
7.1Entertainment
8.4Crew
7.3Food
7.8Boarding
7.6Comfort
Airline reviews

It was really nice journey i personally recommend klm flight

10.0 Excellentsmit, Mar 2026
AMD - BLR
Read more KLM reviews

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

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

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.

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

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.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

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

Information on your arrival and departure airports