IAH - OPO

$338 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 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

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$730
Typical prices: $961-$667
Multiple Airlines
Sun 11/8Fri 11/13
IAH - OPO • 2 stops
Cheapest one-way
$338
Multiple Airlines
Tue 7/28
IAH - OPO • 3 stops
Top airlines
Cheapest • from $760 (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 $822 (round-trip)
Shortest trip • 12h 51m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

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 - Sun, Nov 15
American Airlines Logo
8:05 am - 7:40 am
IAH
-
OPO
17h 35m
2 stops
American Airlines Logo
12:25 pm - 12:30 am
OPO
-
IAH
18h 05m
2 stops
$780American Airlines
Sat, Nov 7 - Sat, Nov 14
Iberia Logo
2:24 pm - 7:40 am
IAH
-
OPO
35h 16m
2 stops
Iberia Logo
12:25 pm - 12:30 am
OPO
-
IAH
18h 05m
2 stops
$785Iberia
Sun, Nov 1 - Sat, Nov 7
Iberia Logo
11:16 am - 11:45 am
IAH
-
OPO
18h 29m
2 stops
Iberia Logo
8:40 pm - 12:30 am
OPO
-
IAH
33h 50m
2 stops
$791Iberia
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
KLM Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
KLM Logo
4:10 pm - 1:05 pm
OPO
-
IAH
26h 55m
1 stop
$819KLM
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
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.

How much is a round-trip flight from Houston George Bush Intcntl Airport to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Houston George Bush Intcntl Airport to Porto departing in November.

What is the cheapest month to fly from Houston George Bush Intcntl Airport to Porto?

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 Porto, 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 Porto is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $1,942 and $1,302 respectively.

Good to know

Low seasonMarch
Cheapest flight$338
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly and prices are also 10% lower on average.
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 5 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Porto was $338 for a one-way ticket and $730 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 $1,158 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 airlines flying 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 1528 reviews
8.4Crew
7.8Boarding
7.2Entertainment
7.7Comfort
7.3Food
Airline reviews

Brand new plane lots of room the snack was very flavourful and enjoyable

10.0 ExcellentBob, May 2026
MAD - AMS
Read more KLM reviews

Brand new plane lots of room the snack was very flavourful and enjoyable

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

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

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

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.

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

Information on your arrival and departure airports