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Cheap flights from Houston to Porto from $208

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 3/3. 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
6:30 am - 9:30 am
IAH
-
OPO
21h 00m1 stop
United Airlines Logo
12:35 pm - 11:39 pm
OPO
-
IAH
16h 04m1 stop
$436United Airlines
Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
8:20 pm - 9:30 am
IAH
-
OPO
31h 10m1 stop
United Airlines Logo
12:35 pm - 11:39 pm
OPO
-
IAH
16h 04m1 stop
$437United Airlines
Mon, Feb 23 - Wed, Mar 11
British Airways Logo
4:36 pm - 5:35 pm
IAH
-
OPO
18h 59m2 stops
British Airways Logo
8:20 am - 11:53 pm
OPO
-
IAH
20h 33m2 stops
$445British Airways
Mon, Feb 23 - Wed, Mar 11
Multiple Airlines Logo
3:50 pm - 4:45 pm
IAH
-
OPO
18h 55m1 stop
Multiple Airlines Logo
8:40 pm - 5:43 pm
OPO
-
IAH
27h 03m2 stops
$448Multiple Airlines
Wed, Feb 4 - Tue, Feb 10
Lufthansa Logo
6:55 pm - 3:25 pm
IAH
-
OPO
14h 30m1 stop
Lufthansa Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m1 stop
$451Lufthansa
Wed, Feb 4 - Tue, Feb 10
British Airways Logo
4:36 pm - 5:35 pm
IAH
-
OPO
18h 59m2 stops
British Airways Logo
8:40 pm - 9:27 pm
OPO
-
IAH
29h 47m2 stops
$452British Airways
Mon, Feb 23 - Tue, Mar 10
Lufthansa Logo
4:30 pm - 10:25 pm
IAH
-
OPO
23h 55m1 stop
Lufthansa Logo
6:00 am - 7:15 pm
OPO
-
IAH
18h 15m1 stop
$453Lufthansa
Wed, Mar 4 - Wed, Mar 11
Iberia Logo
4:48 pm - 4:00 pm
IAH
-
OPO
17h 12m2 stops
Iberia Logo
9:55 pm - 10:49 pm
OPO
-
IAH
30h 54m2 stops
$458Iberia
Wed, Feb 4 - Tue, Feb 10
British Airways Logo
3:50 pm - 5:45 pm
IAH
-
OPO
19h 55m1 stop
British Airways Logo
12:25 pm - 11:53 pm
OPO
-
IAH
41h 28m2 stops
$459British Airways
Tue, Feb 10 - Mon, Feb 16
Iberia Logo
10:13 am - 11:45 am
HOU
-
OPO
19h 32m2 stops
Iberia Logo
8:40 pm - 9:43 am
OPO
-
HOU
19h 03m2 stops
$559Iberia
Sat, Feb 21 - Sat, Feb 28

United Airlines flights from Houston to Porto

Our best United Airlines deals on Houston to Porto flight tickets
United Airlines
Feb 23
IAH8:00 amHouston George Bush Intcntl
19h 30m
1 stop
OPO9:30 amPorto
Mar 10
OPO12:35 pmPorto
16h 55m
2 stops
IAH12:30 amHouston George Bush Intcntl
$436
United Airlines
Feb 23
IAH8:20 pmHouston George Bush Intcntl
31h 10m
1 stop
OPO9:30 amPorto
Mar 11
OPO12:35 pmPorto
16h 04m
1 stop
IAH11:39 pmHouston George Bush Intcntl
$437
United Airlines
Mar 16
IAH4:55 pmHouston George Bush Intcntl
11h 35m
1 stop
OPO9:30 amPorto
Mar 24
OPO12:30 pmPorto
31h 40m
1 stop
IAH3:10 pmHouston George Bush Intcntl
$473

British Airways flights from Houston to Porto

Our best British Airways deals on Houston to Porto flight tickets
British Airways
Feb 23
IAH4:36 pmHouston George Bush Intcntl
18h 59m
2 stops
OPO5:35 pmPorto
Mar 11
OPO8:20 amPorto
20h 33m
2 stops
IAH11:53 pmHouston George Bush Intcntl
$445
British Airways
Feb 23
IAH4:36 pmHouston George Bush Intcntl
18h 59m
2 stops
OPO5:35 pmPorto
Mar 10
OPO8:40 pmPorto
29h 47m
2 stops
IAH9:27 pmHouston George Bush Intcntl
$452
British Airways
Feb 10
IAH3:50 pmHouston George Bush Intcntl
19h 55m
1 stop
OPO5:45 pmPorto
Feb 16
OPO12:25 pmPorto
41h 28m
2 stops
IAH11:53 pmHouston George Bush Intcntl
$459

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 January 8, 2026.
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

Mon 2/23

6:30 am-9:30 am

1 stop21h 00m

Porto

Tue 3/10

12:35 pm-11:39 pm

1 stop16h 04m

$436

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 2/23

8:20 pm-9:30 am

1 stop31h 10m

Porto

Wed 3/11

12:35 pm-11:39 pm

1 stop16h 04m

$437

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 2/23

4:36 pm-5:35 pm

2 stops18h 59m

Porto

Wed 3/11

8:20 am-11:53 pm

2 stops20h 33m

$445

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/4

3:50 pm-4:45 pm

1 stop18h 55m

Porto

Tue 2/10

8:40 pm-5:43 pm

2 stops27h 03m

$448

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/4

6:55 pm-3:25 pm

1 stop14h 30m

Porto

Tue 2/10

6:00 am-6:15 pm

1 stop18h 15m

$451

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 2/23

4:36 pm-5:35 pm

2 stops18h 59m

Porto

Tue 3/10

8:40 pm-9:27 pm

2 stops29h 47m

$452

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 3/4

4:30 pm-10:25 pm

1 stop23h 55m

Porto

Wed 3/11

6:00 am-7:15 pm

1 stop18h 15m

$453

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 2/4

4:48 pm-4:00 pm

2 stops17h 12m

Porto

Tue 2/10

9:55 pm-10:49 pm

2 stops30h 54m

$458

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 2/10

3:50 pm-5:45 pm

1 stop19h 55m

Porto

Mon 2/16

12:25 pm-11:53 pm

2 stops41h 28m

$459

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Sat 2/21

10:13 am-11:45 am

2 stops19h 32m

Porto

Sat 2/28

8:40 pm-9:43 am

2 stops19h 03m

$559

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 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.

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

13h 55m

Direct flights

None
The fastest flight from Houston to Porto takes 13h 55m
There are no direct flights from Houston to Porto. There are no popular flight routes from Houston to Porto.
Search flight deals

  • 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 13h 55m.

  • 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 $494Free CancellationRating
7.7
1,434 reviews
Search KLM flights
United AirlinesPriceFrom $642Free CancellationRating
7.4
9,141 reviews
Search United Airlines flights
LufthansaPriceFrom $679Free CancellationRating
6.8
7,696 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
Braga
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Pinhao
Arcos de Valdevez
Ponte de Lima
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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