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Cheap flights from Houston to Porto from $307

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 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
2:45 pm - 9:30 amIAH-OPO
13h 45m1 stop
United Airlines Logo
6:00 am - 7:15 pmOPO-IAH
18h 15m1 stop
$573United Airlines
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Tue, Mar 10 - Thu, Mar 26
United Airlines Logo
12:30 pm - 9:30 amIAH-OPO
16h 00m2 stops
United Airlines Logo
6:00 am - 7:15 pmOPO-IAH
18h 15m1 stop
$577United Airlines
Find Deal
Tue, Mar 10 - Thu, Mar 26
Delta Logo
11:02 am - 10:30 amIAH-OPO
18h 28m2 stops
Delta Logo
11:15 am - 8:42 amOPO-IAH
26h 27m2 stops
$591Delta
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Tue, Mar 10 - Thu, Mar 26
Delta Logo
3:30 pm - 3:25 pmIAH-OPO
17h 55m1 stop
Delta Logo
11:15 am - 1:30 pmOPO-IAH
32h 15m1 stop
$631Delta
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Sun, Dec 7 - Sat, Dec 13
Delta Logo
3:30 pm - 3:25 pmIAH-OPO
17h 55m1 stop
Delta Logo
6:30 am - 1:30 pmOPO-IAH
37h 00m1 stop
$632Delta
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Thu, Jan 29 - Mon, Feb 2
Turkish Airlines Logo
10:05 pm - 9:55 amIAH-OPO
30h 50m1 stop
Turkish Airlines Logo
10:55 am - 8:10 pmOPO-IAH
38h 15m1 stop
$640Turkish Airlines
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Tue, Mar 10 - Thu, Mar 26
Turkish Airlines Logo
10:05 pm - 9:55 amIAH-OPO
30h 50m1 stop
Turkish Airlines Logo
4:10 pm - 8:10 pmOPO-IAH
33h 00m1 stop
$642Turkish Airlines
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Tue, Mar 10 - Thu, Mar 26
Delta Logo
3:30 pm - 10:25 pmIAH-OPO
24h 55m1 stop
Delta Logo
11:25 am - 4:53 pmOPO-IAH
35h 28m2 stops
$660Delta
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Sun, Dec 7 - Sat, Dec 13
Lufthansa Logo
11:56 am - 11:40 amIAH-OPO
18h 44m2 stops
Lufthansa Logo
6:00 am - 7:15 pmOPO-IAH
18h 15m1 stop
$674Lufthansa
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Tue, Mar 10 - Thu, Mar 26
KLM Logo
6:40 pm - 3:25 pmHOU-OPO
14h 45m2 stops
KLM Logo
6:00 am - 5:33 pmOPO-HOU
17h 33m2 stops
$1,676KLM
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Sat, Dec 6 - Sat, Dec 13

Turkish Airlines flights from Houston to Porto

Our best Turkish Airlines deals on Houston to Porto flight tickets
Turkish Airlines
Mar 10
IAH10:05 pmHouston George Bush Intcntl
30h 50m
1 stop
OPO9:55 amPorto
Mar 26
OPO10:55 amPorto
38h 15m
1 stop
IAH8:10 pmHouston George Bush Intcntl
$640
Find similar
Turkish Airlines
Mar 10
IAH10:05 pmHouston George Bush Intcntl
30h 50m
1 stop
OPO9:55 amPorto
Mar 26
OPO4:10 pmPorto
33h 00m
1 stop
IAH8:10 pmHouston George Bush Intcntl
$642
Find similar
Turkish Airlines
May 6
IAH2:30 pmHouston George Bush Intcntl
19h 10m
1 stop
OPO3:40 pmPorto
May 12
OPO4:40 pmPorto
26h 05m
1 stop
IAH12:45 pmHouston George Bush Intcntl
$666
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Lufthansa flights from Houston to Porto

Our best Lufthansa deals on Houston to Porto flight tickets
Lufthansa
Dec 3
IAH4:50 pmHouston George Bush Intcntl
14h 25m
1 stop
OPO1:15 pmPorto
Dec 9
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$574
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Lufthansa
Dec 3
IAH4:50 pmHouston George Bush Intcntl
14h 25m
1 stop
OPO1:15 pmPorto
Dec 12
OPO6:30 amPorto
16h 00m
1 stop
IAH4:30 pmHouston George Bush Intcntl
$614
Find similar
Lufthansa
Mar 10
IAH11:56 amHouston George Bush Intcntl
18h 44m
2 stops
OPO11:40 amPorto
Mar 26
OPO6:00 amPorto
18h 15m
1 stop
IAH7:15 pmHouston George Bush Intcntl
$674
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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 November 26, 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

Tue 3/10

2:45 pm-9:30 am

1 stop13h 45m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$573

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

12:30 pm-9:30 am

2 stops16h 00m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$577

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

11:02 am-10:30 am

2 stops18h 28m

Porto

Thu 3/26

11:15 am-8:42 am

2 stops26h 27m

$591

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 12/7

3:30 pm-3:25 pm

1 stop17h 55m

Porto

Sat 12/13

11:15 am-1:30 pm

1 stop32h 15m

$631

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Thu 1/29

3:30 pm-3:25 pm

1 stop17h 55m

Porto

Mon 2/2

6:30 am-1:30 pm

1 stop37h 00m

$632

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

10:05 pm-9:55 am

1 stop30h 50m

Porto

Thu 3/26

10:55 am-8:10 pm

1 stop38h 15m

$640

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

10:05 pm-9:55 am

1 stop30h 50m

Porto

Thu 3/26

4:10 pm-8:10 pm

1 stop33h 00m

$642

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 12/7

3:30 pm-10:25 pm

1 stop24h 55m

Porto

Sat 12/13

11:25 am-4:53 pm

2 stops35h 28m

$660

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 3/10

11:56 am-11:40 am

2 stops18h 44m

Porto

Thu 3/26

6:00 am-7:15 pm

1 stop18h 15m

$674

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Sat 12/6

6:40 pm-3:25 pm

2 stops14h 45m

Porto

Sat 12/13

6:00 am-5:33 pm

2 stops17h 33m

$1,676

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 $593. If you aren’t able to travel during the month of November, then book flights to Porto from Houston during January instead. Flights to Porto in January, while not as cheap as those in November, still average around $682.

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

Fastest flight time

17h 55m

Direct flights

None
The fastest flight from Houston to Porto takes 17h 55m
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 $536Free CancellationRating
7.7
1,423 reviews
Search KLM flights
United AirlinesPriceFrom $662Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,594 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
Guimarães
Lamego
Esposende
Chaves
Viseu
Espinho
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.

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