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Cheap flights from Houston to Porto from $386

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 to Porto departing on 2/14. 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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0 bags

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Find the cheapest flights from Houston to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:38 pm - 9:30 amIAH-OPO
12h 52m1 stop
United Airlines Logo
6:00 am - 6:15 pmOPO-IAH
18h 15m1 stop
$516United Airlines
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Wed, Nov 26 - Wed, Dec 10
Multiple Airlines Logo
4:05 pm - 10:30 amIAH-OPO
12h 25m1 stop
Multiple Airlines Logo
4:10 pm - 1:30 pmOPO-IAH
27h 20m1 stop
$527Multiple Airlines
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Tue, Nov 11 - Wed, Nov 19
Multiple Airlines Logo
1:36 pm - 10:30 amIAH-OPO
14h 54m2 stops
Multiple Airlines Logo
4:10 pm - 1:30 pmOPO-IAH
27h 20m1 stop
$531Multiple Airlines
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Wed, Nov 12 - Wed, Nov 19
KLM Logo
3:30 pm - 10:30 amIAH-OPO
13h 00m1 stop
KLM Logo
5:00 am - 1:30 pmOPO-IAH
14h 30m1 stop
$533KLM
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Sun, Feb 8 - Sun, Feb 15
Air Canada Logo
11:55 am - 1:15 pmIAH-OPO
19h 20m2 stops
Air Canada Logo
6:00 am - 9:44 pmOPO-IAH
21h 44m2 stops
$538Air Canada
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Wed, Nov 19 - Sun, Nov 23
Lufthansa Logo
6:36 pm - 10:25 pmIAH-OPO
21h 49m2 stops
Lufthansa Logo
6:00 am - 10:47 pmOPO-IAH
22h 47m2 stops
$541Lufthansa
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Wed, Nov 26 - Wed, Dec 10
Delta Logo
6:00 am - 10:30 amHOU-OPO
22h 30m2 stops
Delta Logo
11:15 am - 9:39 amOPO-HOU
28h 24m2 stops
$541Delta
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Fri, Nov 28 - Sat, Dec 6
Delta Logo
6:00 am - 10:30 amHOU-OPO
22h 30m2 stops
Delta Logo
6:35 am - 9:39 amOPO-HOU
33h 04m2 stops
$542Delta
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Mon, Nov 24 - Thu, Dec 4
Lufthansa Logo
4:30 pm - 10:25 pmIAH-OPO
23h 55m1 stop
Lufthansa Logo
1:45 pm - 2:35 pmOPO-IAH
30h 50m2 stops
$574Lufthansa
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Thu, Nov 6 - Sun, Nov 9
KLM Logo
3:30 pm - 10:40 amIAH-OPO
13h 10m1 stop
KLM Logo
6:05 am - 7:41 pmOPO-IAH
19h 36m2 stops
$742KLM
Find Deal
Mon, Oct 20 - Tue, Nov 4

Delta flights from Houston to Porto

Our best Delta deals on Houston to Porto flight tickets
Delta
Nov 28
HOU6:00 amHouston Hobby
22h 30m
2 stops
OPO10:30 amPorto
Dec 6
OPO11:15 amPorto
28h 24m
2 stops
HOU9:39 amHouston Hobby
$541
Find similar
Delta
Nov 24
HOU6:00 amHouston Hobby
22h 30m
2 stops
OPO10:30 amPorto
Dec 4
OPO6:35 amPorto
33h 04m
2 stops
HOU9:39 amHouston Hobby
$542
Find similar
Delta
Nov 12
IAH4:05 pmHouston George Bush Intcntl
12h 25m
1 stop
OPO10:30 amPorto
Nov 16
OPO11:25 amPorto
32h 30m
1 stop
IAH1:55 pmHouston George Bush Intcntl
$546
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United Airlines flights from Houston to Porto

Our best United Airlines deals on Houston to Porto flight tickets
United Airlines
Nov 26
IAH2:38 pmHouston George Bush Intcntl
12h 52m
1 stop
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$516
Find similar
United Airlines
Nov 19
IAH1:32 pmHouston George Bush Intcntl
13h 58m
1 stop
OPO9:30 amPorto
Nov 23
OPO12:35 pmPorto
17h 24m
2 stops
IAH11:59 pmHouston George Bush Intcntl
$623
Find similar
United Airlines
Mar 14
IAH5:30 pmHouston George Bush Intcntl
16h 35m
1 stop
OPO3:05 pmPorto
Mar 21
OPO6:00 amPorto
23h 26m
2 stops
IAH12:26 amHouston George Bush Intcntl
$700
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momondo Fare Finder

 
Customize your flight search to find flights from Houston 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 October 9, 2025.
Use the filters below to find and compare flights from Houston to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/26

2:38 pm-9:30 am

1 stop12h 52m

Porto

Wed 12/10

6:00 am-6:15 pm

1 stop18h 15m

$516

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/11

4:05 pm-10:30 am

1 stop12h 25m

Porto

Wed 11/19

4:10 pm-1:30 pm

1 stop27h 20m

$527

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/12

1:36 pm-10:30 am

2 stops14h 54m

Porto

Wed 11/19

4:10 pm-1:30 pm

1 stop27h 20m

$531

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 2/8

3:30 pm-10:30 am

1 stop13h 00m

Porto

Sun 2/15

5:00 am-1:30 pm

1 stop14h 30m

$533

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/19

11:55 am-1:15 pm

2 stops19h 20m

Porto

Sun 11/23

6:00 am-9:44 pm

2 stops21h 44m

$538

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/26

6:36 pm-10:25 pm

2 stops21h 49m

Porto

Wed 12/10

6:00 am-10:47 pm

2 stops22h 47m

$541

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Fri 11/28

6:00 am-10:30 am

2 stops22h 30m

Porto

Sat 12/6

11:15 am-9:39 am

2 stops28h 24m

$541

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 11/24

6:00 am-10:30 am

2 stops22h 30m

Porto

Thu 12/4

6:35 am-9:39 am

2 stops33h 04m

$542

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 11/6

4:30 pm-10:25 pm

1 stop23h 55m

Porto

Sun 11/9

1:45 pm-2:35 pm

2 stops30h 50m

$574

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/20

3:30 pm-10:40 am

1 stop13h 10m

Porto

Tue 11/4

6:05 am-7:41 pm

2 stops19h 36m

$742

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 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 and Porto?

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Houston, with most prices found around $623. If you aren’t able to travel during the month of November, then book flights to Porto from Houston during March instead. Flights to Porto in March, while not as cheap as those in November, still average around $738.

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 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 at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Houston to Porto flight deals and tips

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

Direct flights

None
There are no direct flights from Houston to Porto. There are no popular flight routes from Houston to Porto.
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  • How far is Houston to Porto by plane?

    A flight from Houston to Porto will travel around 4740.9 mi. A reasonable flight in good conditions will take 12h 25m.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Houston to Porto Airport.

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

    The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Houston to Porto

Compare and see reviews for airlines that fly from Houston to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $595Free CancellationRating
7.7
1,399 reviews
Search KLM flights
United AirlinesPriceFrom $654Free CancellationRating
7.4
8,966 reviews
Search United Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,463 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
Coimbra
Aveiro
Braga
Matosinhos
Caminha
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

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

Finding the right flight to Porto from Houston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Porto quick and easy, saving you time and money.

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

Flights from Houston to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Houston to Porto.

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

Yes momondo offers price alerts on flights to Porto from Houston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Porto trip

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