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Cheap flights from Houston to Porto from $319

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 10/21. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Houston to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:53 pm - 9:30 am
IAH
-
OPO
13h 37m
1 stop
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$707United Airlines
Tue, Nov 10 - Fri, Nov 20
Delta Logo
4:05 pm - 10:35 am
IAH
-
OPO
12h 30m
1 stop
Delta Logo
11:15 am - 1:25 pm
OPO
-
IAH
32h 10m
1 stop
$708Delta
Tue, Nov 10 - Wed, Nov 18
Delta Logo
12:55 pm - 9:05 am
IAH
-
OPO
14h 10m
1 stop
Delta Logo
5:00 am - 1:25 pm
OPO
-
IAH
14h 25m
1 stop
$709Delta
Wed, Nov 11 - Wed, Nov 18
United Airlines Logo
11:55 am - 9:30 am
IAH
-
OPO
15h 35m
2 stops
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$711United Airlines
Tue, Nov 10 - Fri, Nov 20
Delta Logo
3:05 pm - 3:25 pm
IAH
-
OPO
18h 20m
1 stop
Delta Logo
5:00 am - 1:25 pm
OPO
-
IAH
14h 25m
1 stop
$712Delta
Mon, Nov 16 - Thu, Nov 19
KLM Logo
6:24 pm - 3:25 pm
IAH
-
OPO
16h 01m
2 stops
KLM Logo
5:00 am - 1:05 pm
OPO
-
IAH
14h 05m
1 stop
$717KLM
Mon, Oct 26 - Tue, Nov 3
Multiple Airlines Logo
11:50 am - 12:05 pm
IAH
-
OPO
19h 15m
2 stops
Multiple Airlines Logo
7:20 pm - 9:39 pm
OPO
-
IAH
32h 19m
2 stops
$719Multiple Airlines
Mon, Oct 26 - Tue, Nov 3
Air Canada Logo
11:50 am - 12:05 pm
IAH
-
OPO
18h 15m
2 stops
Air Canada Logo
6:00 am - 10:53 am
OPO
-
IAH
34h 53m
2 stops
$721Air Canada
Tue, Nov 10 - Fri, Nov 20
KLM Logo
5:28 pm - 3:25 pm
HOU
-
OPO
16h 57m
2 stops
KLM Logo
5:00 am - 4:33 pm
OPO
-
HOU
17h 33m
2 stops
$802KLM
Mon, Oct 26 - Tue, Nov 3
Multiple Airlines Logo
5:28 pm - 3:25 pm
HOU
-
OPO
15h 57m
2 stops
Multiple Airlines Logo
11:45 am - 11:09 pm
OPO
-
HOU
17h 24m
2 stops
$854Multiple Airlines
Wed, Oct 14 - Wed, Oct 21

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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 10
IAH1:53 pmHouston George Bush Intcntl
13h 37m
1 stop
OPO9:30 amPorto
Nov 20
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$707
United Airlines
Nov 10
IAH11:55 amHouston George Bush Intcntl
15h 35m
2 stops
OPO9:30 amPorto
Nov 20
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$711
United Airlines
Nov 14
IAH6:29 pmHouston George Bush Intcntl
33h 01m
1 stop
OPO9:30 amPorto
Nov 20
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$718

Iberia flights from Houston to Porto

Our best Iberia deals on Houston to Porto flight tickets
Iberia
Nov 10
HOU12:15 pmHouston Hobby
17h 30m
2 stops
OPO11:45 amPorto
Nov 18
OPO8:40 pmPorto
17h 55m
2 stops
HOU8:35 amHouston Hobby
$977
Iberia
Nov 11
HOU12:15 pmHouston Hobby
37h 25m
2 stops
OPO7:40 amPorto
Nov 18
OPO8:40 pmPorto
17h 55m
2 stops
HOU8:35 amHouston Hobby
$986
Iberia
Nov 15
HOU10:11 amHouston Hobby
15h 29m
2 stops
OPO7:40 amPorto
Nov 17
OPO8:40 pmPorto
27h 12m
2 stops
HOU5:52 pmHouston Hobby
$988

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 July 12, 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

Cheapest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/10

1:53 pm-9:30 am

1 stop13h 37m

Porto

Fri 11/20

6:00 am-6:15 pm

1 stop18h 15m

$707

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/10

4:05 pm-10:35 am

1 stop12h 30m

Porto

Wed 11/18

11:15 am-1:25 pm

1 stop32h 10m

$708
Quickest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/11

12:55 pm-9:05 am

1 stop14h 10m

Porto

Wed 11/18

5:00 am-1:25 pm

1 stop14h 25m

$709

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/10

11:55 am-9:30 am

2 stops15h 35m

Porto

Fri 11/20

6:00 am-6:15 pm

1 stop18h 15m

$711

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

3:05 pm-3:25 pm

1 stop18h 20m

Porto

Thu 11/19

5:00 am-1:25 pm

1 stop14h 25m

$712

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/26

6:24 pm-3:25 pm

2 stops16h 01m

Porto

Tue 11/3

5:00 am-1:05 pm

1 stop14h 05m

$717

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/26

11:50 am-12:05 pm

2 stops19h 15m

Porto

Tue 11/3

7:20 pm-9:39 pm

2 stops32h 19m

$719

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 11/10

11:50 am-12:05 pm

2 stops18h 15m

Porto

Fri 11/20

6:00 am-10:53 am

2 stops34h 53m

$721

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 10/26

5:28 pm-3:25 pm

2 stops16h 57m

Porto

Tue 11/3

5:00 am-4:33 pm

2 stops17h 33m

$802

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 10/14

5:28 pm-3:25 pm

2 stops15h 57m

Porto

Wed 10/21

11:45 am-11:09 pm

2 stops17h 24m

$854

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 March is, on average, the cheapest month to fly to Porto from Houston, with most prices found around $476. If you aren’t able to travel during the month of March, then book flights to Porto from Houston during April instead. Flights to Porto in April, while not as cheap as those in March, still average around $484.

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

12h 30m

Direct flights

None
The fastest flight from Houston to Porto takes 12h 30m
There are no direct flights from Houston to Porto. There are no popular flight routes from Houston to Porto.
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Frequently asked questions about flying from Houston to Porto

  • 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 30m.

  • 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 $476Free CancellationRating
7.8
1,537 reviews
Search KLM flights
United AirlinesPriceFrom $626Free CancellationRating
7.4
9,979 reviews
Search United Airlines 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
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
Mesao Frio
Penafiel
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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