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Cheap flights from Houston George Bush Intcntl Airport to Porto from $245

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 10/19. 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

Cheap round-trip flights

Multiple Airlines Logo
4:05 pm - 10:30 amIAH-OPO
12h 25m1 stop
Multiple Airlines Logo
11:15 am - 1:30 pmOPO-IAH
32h 15m1 stop
$577Multiple Airlines
Find Deal
Tue, Feb 17 - Thu, Feb 26
Lufthansa Logo
4:30 pm - 2:45 pmIAH-OPO
16h 15m1 stop
Lufthansa Logo
4:15 pm - 2:35 pmOPO-IAH
28h 20m1 stop
$578Lufthansa
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Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
1:31 pm - 9:30 amIAH-OPO
13h 59m1 stop
United Airlines Logo
6:00 am - 6:15 pmOPO-IAH
18h 15m1 stop
$580United Airlines
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Mon, Nov 17 - Tue, Nov 25
Delta Logo
4:05 pm - 10:30 amIAH-OPO
12h 25m1 stop
Delta Logo
11:15 am - 1:30 pmOPO-IAH
32h 15m1 stop
$583Delta
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Sun, Nov 16 - Tue, Nov 25
United Airlines Logo
12:00 pm - 9:30 amIAH-OPO
15h 30m2 stops
United Airlines Logo
6:00 am - 6:15 pmOPO-IAH
18h 15m1 stop
$584United Airlines
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Sun, Nov 16 - Tue, Nov 25
Delta Logo
9:38 am - 10:30 amIAH-OPO
18h 52m2 stops
Delta Logo
6:35 am - 1:30 pmOPO-IAH
36h 55m1 stop
$587Delta
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Tue, Nov 18 - Thu, Nov 27
British Airways Logo
3:50 pm - 4:05 pmIAH-OPO
18h 15m1 stop
British Airways Logo
8:20 am - 11:22 pmOPO-IAH
21h 02m2 stops
$646British Airways
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Wed, Jan 21 - Sun, Jan 25
KLM Logo
3:30 pm - 10:30 amIAH-OPO
13h 00m1 stop
KLM Logo
6:30 am - 11:56 pmOPO-IAH
23h 26m2 stops
$655KLM
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Fri, Nov 7 - Fri, Nov 14
KLM Logo
12:35 pm - 10:30 amIAH-OPO
15h 55m2 stops
KLM Logo
5:00 am - 6:20 pmOPO-IAH
19h 20m2 stops
$659KLM
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Wed, Nov 12 - Sun, Nov 16
British Airways Logo
3:50 pm - 5:15 pmIAH-OPO
19h 25m1 stop
British Airways Logo
4:55 pm - 2:05 pmOPO-IAH
27h 10m1 stop
$682British Airways
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Thu, Dec 11 - Thu, Dec 18

KLM flights from Houston George Bush Intcntl Airport to Porto

Our best KLM deals on Houston George Bush Intcntl Airport to Porto flight tickets
KLM
Nov 7
IAH3:30 pmHouston George Bush Intcntl
13h 00m
1 stop
OPO10:30 amPorto
Nov 14
OPO6:30 amPorto
23h 26m
2 stops
IAH11:56 pmHouston George Bush Intcntl
$655
Find similar
KLM
Nov 12
IAH12:35 pmHouston George Bush Intcntl
15h 55m
2 stops
OPO10:30 amPorto
Nov 16
OPO5:00 amPorto
19h 20m
2 stops
IAH6:20 pmHouston George Bush Intcntl
$659
Find similar
KLM
Nov 6
IAH3:30 pmHouston George Bush Intcntl
13h 00m
1 stop
OPO10:30 amPorto
Nov 9
OPO5:00 amPorto
14h 30m
1 stop
IAH1:30 pmHouston George Bush Intcntl
$683
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TAP AIR PORTUGAL flights from Houston George Bush Intcntl Airport to Porto

Our best TAP AIR PORTUGAL deals on Houston George Bush Intcntl Airport to Porto flight tickets
TAP AIR PORTUGAL
Sep 30
IAH2:35 pmHouston George Bush Intcntl
27h 05m
2 stops
OPO11:40 pmPorto
Oct 10
OPO9:00 amPorto
40h 00m
2 stops
IAH7:00 pmHouston George Bush Intcntl
$1,241
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TAP AIR PORTUGAL
Sep 30
IAH2:35 pmHouston George Bush Intcntl
17h 55m
2 stops
OPO2:30 pmPorto
Oct 9
OPO6:05 pmPorto
21h 47m
1 stop
IAH9:52 amHouston George Bush Intcntl
$1,266
Find similar
TAP AIR PORTUGAL
Oct 6
IAH12:01 pmHouston George Bush Intcntl
16h 29m
1 stop
OPO10:30 amPorto
Oct 21
OPO11:55 amPorto
41h 35m
2 stops
IAH11:30 pmHouston George Bush Intcntl
$1,355
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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 September 25, 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 2/17

4:05 pm-10:30 am

1 stop12h 25m

Porto

Thu 2/26

11:15 am-1:30 pm

1 stop32h 15m

$577

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/18

4:30 pm-2:45 pm

1 stop16h 15m

Porto

Tue 11/25

4:15 pm-2:35 pm

1 stop28h 20m

$578

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/17

1:31 pm-9:30 am

1 stop13h 59m

Porto

Tue 11/25

6:00 am-6:15 pm

1 stop18h 15m

$580

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/16

4:05 pm-10:30 am

1 stop12h 25m

Porto

Tue 11/25

11:15 am-1:30 pm

1 stop32h 15m

$583

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/16

12:00 pm-9:30 am

2 stops15h 30m

Porto

Tue 11/25

6:00 am-6:15 pm

1 stop18h 15m

$584

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/18

9:38 am-10:30 am

2 stops18h 52m

Porto

Thu 11/27

6:35 am-1:30 pm

1 stop36h 55m

$587

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 1/21

3:50 pm-4:05 pm

1 stop18h 15m

Porto

Sun 1/25

8:20 am-11:22 pm

2 stops21h 02m

$646

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 11/7

3:30 pm-10:30 am

1 stop13h 00m

Porto

Fri 11/14

6:30 am-11:56 pm

2 stops23h 26m

$655

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

12:35 pm-10:30 am

2 stops15h 55m

Porto

Sun 11/16

5:00 am-6:20 pm

2 stops19h 20m

$659

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 12/11

3:50 pm-5:15 pm

1 stop19h 25m

Porto

Thu 12/18

4:55 pm-2:05 pm

1 stop27h 10m

$682

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Houston George Bush Intcntl Airport and Porto?

What is the cheapest month to fly to Porto?

The month of October is, on average, the cheapest month to fly to Porto from Houston George Bush Intcntl Airport, with most prices found around $701. If you aren’t able to travel during the month of October, then book flights to Porto from Houston George Bush Intcntl Airport during March instead. Flights to Porto in March, while not as cheap as those in October, still average around $727.

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

Direct flights

None
There are no direct flights from Houston George Bush Intcntl Airport to Porto. There are no popular flight routes from Houston George Bush Intcntl Airport to Porto.
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  • 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 12h 25m, 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
1,391 reviews
Search KLM flights
United AirlinesPriceFrom $673Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,424 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
Esposende
Lamego
Guimarães
Chaves
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Mira

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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