OPO

$350 Find Cheap Flights from Houston 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 Houston to Porto departing on 7/4. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$709
Typical prices: $961-$667
Air France, KLM
Sun 11/8Mon 11/16
IAH - OPO • 1 stop
Cheapest one-way
$350
Multiple Airlines
Sat 7/4
IAH - OPO • 3 stops
Top airlines
Cheapest • from $714 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+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 Houston to Porto

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

Sun, Nov 8 - Mon, Nov 16
Multiple Airlines Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
Multiple Airlines Logo
4:10 pm - 1:05 pm
OPO
-
IAH
26h 55m
1 stop
$709Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
Multiple Airlines Logo
1:15 pm - 10:30 am
IAH
-
OPO
15h 15m
2 stops
Multiple Airlines Logo
11:15 am - 1:05 pm
OPO
-
IAH
31h 50m
1 stop
$713Multiple Airlines
Wed, Dec 2 - Tue, Dec 8
KLM Logo
11:50 am - 9:05 am
IAH
-
OPO
15h 15m
2 stops
KLM Logo
9:55 am - 1:25 pm
OPO
-
IAH
33h 30m
1 stop
$714KLM
Wed, Dec 2 - Tue, Dec 8
Delta Logo
11:50 am - 10:30 am
IAH
-
OPO
16h 40m
2 stops
Delta Logo
5:00 am - 6:28 pm
OPO
-
IAH
19h 28m
2 stops
$723Delta
Wed, Dec 2 - Tue, Dec 8
Delta Logo
6:00 am - 9:05 am
HOU
-
OPO
21h 05m
2 stops
Delta Logo
5:00 am - 9:43 pm
OPO
-
HOU
22h 43m
2 stops
$724Delta
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 - Sat, Nov 14
KLM Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
KLM Logo
4:10 pm - 1:25 pm
OPO
-
IAH
27h 15m
1 stop
$759KLM
Sun, Nov 8 - Mon, Nov 16
American Airlines Logo
9:05 am - 7:40 am
HOU
-
OPO
16h 35m
2 stops
American Airlines Logo
8:40 pm - 9:40 am
OPO
-
HOU
19h 00m
2 stops
$760American 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
Mon, Oct 12 - Wed, Oct 21
United Airlines Logo
7:50 pm - 7:00 am
IAH
-
OPO
29h 10m
2 stops
United Airlines Logo
11:20 am - 11:41 am
OPO
-
IAH
30h 21m
2 stops
$766United Airlines
Booking Insights

KAYAK's insights & trends for Houston to Porto flights

Get data-powered insights and trends into flights from Houston 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 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 to Porto departing in November.

What is the cheapest month to fly from Houston to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston 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 to Porto is March, where tickets cost $476 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,146 and $872 respectively.

Good to know

Cheapest flight$350
Flight from Houston George Bush Airport to Porto

When to book flights from Houston to Porto

Are your dates flexible? Find out the best times to travel from Houston 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 flights from Houston to Porto

  • What is the cheapest flight from Houston to Porto?

    In the last 5 days, the lowest price for a flight from Houston to Porto was $350 for a one-way ticket and $709 for a round-trip.

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

    A passport is required to fly from Houston to Porto.

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

    There are 2 airports in Houston (Houston Hobby and Houston George Bush Intcntl.) and only 1 airport in Porto (Porto). The cheapest flights are generally found on the Houston George Bush Airport to Porto flight route.

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

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

  • Which airline alliances offer flights from Houston to Porto?

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

  • How does KAYAK find such low prices on flights from Houston 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 to Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from 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 from Houston 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston 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 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 Houston 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 Houston 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 1527 reviews
7.7Comfort
7.3Food
7.8Boarding
8.4Crew
7.2Entertainment
Airline reviews

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.

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

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

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

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

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

Empty seats next to me - wish it had been for a longer flight!!

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

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.

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 Houston to Porto

Information on your arrival and departure airports