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Cheap flights from Houston George Bush Intcntl Airport to Porto from $255

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Houston George Bush Intcntl Airport to Porto departing on 11/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Houston George Bush Intcntl Airport to Porto (IAH-OPO)

Cheap round-trip flights

Logo
10:00 am - 3:00 pmIAH-OPO
23h 00m2 stops
Logo
7:20 am - 10:14 pmOPO-IAH
20h 54m3 stops
$615
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Tue, Oct 14 - Fri, Oct 24
United Airlines Logo
2:38 pm - 9:30 amIAH-OPO
12h 52m1 stop
United Airlines Logo
12:35 pm - 10:31 pmOPO-IAH
15h 56m1 stop
$642United Airlines
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Wed, Nov 12 - Sun, Nov 16
United Airlines Logo
2:38 pm - 9:30 amIAH-OPO
12h 52m1 stop
United Airlines Logo
12:35 pm - 12:29 amOPO-IAH
17h 54m2 stops
$647United Airlines
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Wed, Nov 12 - Sun, Nov 16
Air Canada Logo
11:50 am - 11:40 amIAH-OPO
17h 50m2 stops
Air Canada Logo
6:00 am - 9:44 pmOPO-IAH
21h 44m2 stops
$656Air Canada
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Wed, Nov 19 - Sun, Nov 23
Air Canada Logo
11:50 am - 12:05 pmIAH-OPO
18h 15m2 stops
Air Canada Logo
6:00 am - 9:09 amOPO-IAH
33h 09m2 stops
$658Air Canada
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Wed, Nov 12 - Sun, Nov 16
Lufthansa Logo
4:30 pm - 3:25 pmIAH-OPO
16h 55m1 stop
Lufthansa Logo
12:40 pm - 2:35 pmOPO-IAH
31h 55m1 stop
$668Lufthansa
Find Deal
Wed, Nov 19 - Sun, Nov 23
Lufthansa Logo
4:30 pm - 3:25 pmIAH-OPO
16h 55m1 stop
Lufthansa Logo
12:40 pm - 2:35 pmOPO-IAH
31h 55m1 stop
$669Lufthansa
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Wed, Nov 12 - Sun, Nov 16
British Airways Logo
9:00 pm - 7:30 pmIAH-OPO
16h 30m1 stop
British Airways Logo
12:20 pm - 1:35 pmOPO-IAH
31h 15m2 stops
$684British Airways
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Tue, Oct 14 - Fri, Oct 24
Turkish Airlines Logo
2:25 pm - 3:50 pmIAH-OPO
19h 25m1 stop
Turkish Airlines Logo
4:50 pm - 12:40 pmOPO-IAH
25h 50m1 stop
$693Turkish Airlines
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Wed, Sep 17 - Tue, Oct 14
Turkish Airlines Logo
2:25 pm - 3:50 pmIAH-OPO
19h 25m1 stop
Turkish Airlines Logo
4:50 pm - 7:05 pmOPO-IAH
32h 15m1 stop
$707Turkish Airlines
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Mon, Aug 18 - Tue, Sep 2

United Airlines flights from Houston George Bush Intcntl Airport to Porto

Our best United Airlines deals on Houston George Bush Intcntl Airport to Porto flight tickets
United Airlines
Nov 12
IAH2:38 pmHouston George Bush Intcntl
12h 52m
1 stop
OPO9:30 amPorto
Nov 16
OPO12:35 pmPorto
15h 56m
1 stop
IAH10:31 pmHouston George Bush Intcntl
$642
Find similar
United Airlines
Nov 12
IAH2:38 pmHouston George Bush Intcntl
12h 52m
1 stop
OPO9:30 amPorto
Nov 16
OPO12:35 pmPorto
17h 54m
2 stops
IAH12:29 amHouston George Bush Intcntl
$647
Find similar
United Airlines
Oct 15
IAH4:25 pmHouston George Bush Intcntl
11h 20m
1 stop
OPO9:45 amPorto
Oct 23
OPO6:00 amPorto
35h 04m
2 stops
IAH11:04 amHouston George Bush Intcntl
$665
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Turkish Airlines flights from Houston George Bush Intcntl Airport to Porto

Our best Turkish Airlines deals on Houston George Bush Intcntl Airport to Porto flight tickets
Turkish Airlines
Sep 17
IAH2:25 pmHouston George Bush Intcntl
19h 25m
1 stop
OPO3:50 pmPorto
Oct 14
OPO4:50 pmPorto
25h 50m
1 stop
IAH12:40 pmHouston George Bush Intcntl
$693
Find similar
Turkish Airlines
Aug 18
IAH2:25 pmHouston George Bush Intcntl
19h 25m
1 stop
OPO3:50 pmPorto
Sep 2
OPO4:50 pmPorto
32h 15m
1 stop
IAH7:05 pmHouston George Bush Intcntl
$707
Find similar
Turkish Airlines
Aug 18
IAH2:25 pmHouston George Bush Intcntl
19h 25m
1 stop
OPO3:50 pmPorto
Sep 2
OPO4:50 pmPorto
25h 50m
1 stop
IAH12:40 pmHouston George Bush Intcntl
$713
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momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 5, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/14

10:00 am-3:00 pm

2 stops23h 00m

Porto

Fri 10/24

7:20 am-10:14 pm

3 stops20h 54m

$615

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

2:38 pm-9:30 am

1 stop12h 52m

Porto

Sun 11/16

12:35 pm-10:31 pm

1 stop15h 56m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

2:38 pm-9:30 am

1 stop12h 52m

Porto

Sun 11/16

12:35 pm-12:29 am

2 stops17h 54m

$647

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

11:50 am-11:40 am

2 stops17h 50m

Porto

Sun 11/23

6:00 am-9:44 pm

2 stops21h 44m

$656

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

11:50 am-12:05 pm

2 stops18h 15m

Porto

Sun 11/16

6:00 am-9:09 am

2 stops33h 09m

$658

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

4:30 pm-3:25 pm

1 stop16h 55m

Porto

Sun 11/23

12:40 pm-2:35 pm

1 stop31h 55m

$668

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

4:30 pm-3:25 pm

1 stop16h 55m

Porto

Sun 11/16

12:40 pm-2:35 pm

1 stop31h 55m

$669

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 10/14

9:00 pm-7:30 pm

1 stop16h 30m

Porto

Fri 10/24

12:20 pm-1:35 pm

2 stops31h 15m

$684

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 9/17

2:25 pm-3:50 pm

1 stop19h 25m

Porto

Tue 10/14

4:50 pm-12:40 pm

1 stop25h 50m

$693

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/18

2:25 pm-3:50 pm

1 stop19h 25m

Porto

Tue 9/2

4:50 pm-7:05 pm

1 stop32h 15m

$707

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Porto from

How to get the cheapest flight ticket from Houston George Bush Intcntl Airport to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of March is, on average, the cheapest month to fly to Porto from Houston George Bush Intcntl Airport, with most prices found around $717. If you aren’t able to travel during the month of March, then book flights to Porto from Houston George Bush Intcntl Airport during October instead. Flights to Porto in October, while not as cheap as those in March, still average around $753.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Wednesday when prices can be found for as low as $887. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $1,432. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the afternoon is the cheapest time of day to fly from Houston George Bush Intcntl Airport to Porto when you can find flight prices for as low as $1,080. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,403 on average. Flights to Porto from Houston George Bush Intcntl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Houston George Bush Intcntl Airport to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Houston George Bush Intcntl Airport to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Houston George Bush Intcntl Airport to Porto (IAH to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Houston George Bush Intcntl Airport to Porto

Best Price Found

$255

Fastest flight time

11h 20m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from Houston George Bush Intcntl Airport in the past 72 hours is $255. The best round-trip flight deal from Houston George Bush Intcntl Airport to Porto found on momondo in the last 72 hours is $615.
The fastest flight from Houston George Bush Intcntl Airport to Porto takes 11h 20m
There are no direct flights from Houston George Bush Intcntl Airport to Porto. Popular non-direct route for this connection is Houston George Bush Intcntl Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)
Search flight deals

  • How far is Houston George Bush Intcntl to Porto by plane?

    The straight-line distance from Houston George Bush Intcntl to Porto is 4730.3 mi. Flights usually cover this in 11h 20m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Houston George Bush Intcntl Airport to Porto Airport?

    Prices for flights from Houston George Bush Intcntl Airport to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Houston George Bush Intcntl Airport to Porto Airport?

  • How old do you have to be to fly from Houston George Bush Intcntl Airport to Porto Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston George Bush Intcntl Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Houston George Bush Intcntl Airport to Porto?

Best airlines flying from Houston George Bush Intcntl Airport to Porto

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $629Free CancellationRating
7.8
1,381 reviews
Search KLM flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,287 reviews
Search Lufthansa flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Lamego
Guimarães
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Pinhao
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Houston to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from Houston.

Can I find flights from Houston to Porto with flexible booking policies on momondo?

All flight searches from Houston to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Houston to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Houston.

I’m not ready to book a flight from Houston to Porto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Houston to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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