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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 9/28. 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.
Delta Logo
1:00 pm - 10:30 am
HOU
-
OPO
15h 30m
2 stops
Delta Logo
5:00 am - 9:43 pm
OPO
-
HOU
22h 43m
2 stops
$723Delta
Mon, Nov 16 - Thu, Nov 19
American Airlines Logo
4:15 pm - 4:00 pm
HOU
-
OPO
17h 45m
2 stops
American Airlines Logo
12:25 pm - 11:53 pm
OPO
-
HOU
17h 28m
2 stops
$842American Airlines
Mon, Oct 12 - Wed, Oct 21
Multiple Airlines Logo
10:00 am - 7:00 am
IAH
-
OPO
15h 00m
1 stop
Multiple Airlines Logo
11:20 am - 7:38 pm
OPO
-
IAH
14h 18m
1 stop
$853Multiple Airlines
Mon, Aug 17 - Wed, Aug 26
Multiple Airlines Logo
11:45 am - 7:00 am
IAH
-
OPO
13h 15m
2 stops
Multiple Airlines Logo
11:20 am - 7:38 pm
OPO
-
IAH
14h 18m
1 stop
$858Multiple Airlines
Mon, Aug 17 - Wed, Aug 26
Multiple Airlines Logo
11:45 am - 7:00 am
IAH
-
OPO
13h 15m
2 stops
Multiple Airlines Logo
11:20 am - 10:01 pm
OPO
-
IAH
16h 41m
2 stops
$864Multiple Airlines
Mon, Aug 17 - Wed, Aug 26
United Airlines Logo
10:00 am - 7:00 am
IAH
-
OPO
15h 00m
1 stop
United Airlines Logo
6:00 am - 5:55 pm
OPO
-
IAH
17h 55m
1 stop
$865United Airlines
Mon, Aug 17 - Wed, Aug 26
Multiple Airlines Logo
10:00 am - 7:00 am
IAH
-
OPO
15h 00m
1 stop
Multiple Airlines Logo
6:20 am - 4:30 pm
OPO
-
IAH
16h 10m
1 stop
$866Multiple Airlines
Mon, Aug 17 - Tue, Aug 25
United Airlines Logo
7:00 am - 7:00 am
IAH
-
OPO
18h 00m
2 stops
United Airlines Logo
6:00 am - 5:55 pm
OPO
-
IAH
17h 55m
1 stop
$870United Airlines
Mon, Aug 17 - Fri, Aug 28
KLM Logo
5:48 pm - 3:30 pm
IAH
-
OPO
15h 42m
2 stops
KLM Logo
8:00 pm - 1:20 pm
OPO
-
IAH
23h 20m
1 stop
$876KLM
Mon, Aug 10 - Mon, Aug 24
Iberia Logo
12:46 pm - 4:00 pm
HOU
-
OPO
21h 14m
2 stops
Iberia Logo
8:20 am - 7:53 pm
OPO
-
HOU
41h 33m
2 stops
$1,095Iberia
Wed, Jul 8 - Wed, Jul 15

Turkish Airlines flights from Houston to Porto

Our best Turkish Airlines deals on Houston to Porto flight tickets
Turkish Airlines
Aug 23
IAH9:10 pmHouston George Bush Intcntl
30h 30m
1 stop
OPO9:40 amPorto
Aug 31
OPO6:30 amPorto
18h 45m
1 stop
IAH7:15 pmHouston George Bush Intcntl
$877
Turkish Airlines
Aug 20
IAH9:10 pmHouston George Bush Intcntl
20h 20m
1 stop
OPO11:30 pmPorto
Aug 25
OPO10:40 amPorto
38h 35m
1 stop
IAH7:15 pmHouston George Bush Intcntl
$896
Turkish Airlines
Jun 7
IAH9:10 pmHouston George Bush Intcntl
30h 30m
1 stop
OPO9:40 amPorto
Jun 12
OPO10:40 amPorto
38h 35m
1 stop
IAH7:15 pmHouston George Bush Intcntl
$1,494

United Airlines flights from Houston to Porto

Our best United Airlines deals on Houston to Porto flight tickets
United Airlines
Nov 16
IAH10:00 amHouston George Bush Intcntl
17h 30m
1 stop
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$707
United Airlines
Nov 16
IAH11:00 amHouston George Bush Intcntl
16h 30m
1 stop
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$708
United Airlines
Nov 16
IAH7:30 amHouston George Bush Intcntl
20h 00m
2 stops
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$712

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 May 28, 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

HOU - OPO

HOUOPO

Houston Hobby

Mon 11/16

1:00 pm-10:30 am

2 stops15h 30m

Porto

Thu 11/19

5:00 am-9:43 pm

2 stops22h 43m

$723

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 10/12

4:15 pm-4:00 pm

2 stops17h 45m

Porto

Wed 10/21

12:25 pm-11:53 pm

2 stops17h 28m

$842

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

10:00 am-7:00 am

1 stop15h 00m

Porto

Wed 8/26

11:20 am-7:38 pm

1 stop14h 18m

$853
Quickest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

11:45 am-7:00 am

2 stops13h 15m

Porto

Wed 8/26

11:20 am-7:38 pm

1 stop14h 18m

$858

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

11:45 am-7:00 am

2 stops13h 15m

Porto

Wed 8/26

11:20 am-10:01 pm

2 stops16h 41m

$864

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

10:00 am-7:00 am

1 stop15h 00m

Porto

Wed 8/26

6:00 am-5:55 pm

1 stop17h 55m

$865

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

10:00 am-7:00 am

1 stop15h 00m

Porto

Tue 8/25

6:20 am-4:30 pm

1 stop16h 10m

$866

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/17

7:00 am-7:00 am

2 stops18h 00m

Porto

Fri 8/28

6:00 am-5:55 pm

1 stop17h 55m

$870

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/10

5:48 pm-3:30 pm

2 stops15h 42m

Porto

Mon 8/24

8:00 pm-1:20 pm

1 stop23h 20m

$876

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 7/8

12:46 pm-4:00 pm

2 stops21h 14m

Porto

Wed 7/15

8:20 am-7:53 pm

2 stops41h 33m

$1,095

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

13h 40m

Direct flights

None
The fastest flight from Houston to Porto takes 13h 40m
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 13h 40m.

  • 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
1,525 reviews
Search KLM flights
United AirlinesPriceFrom $626Free CancellationRating
7.4
9,751 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
Aveiro
Braga
Matosinhos
Lamego
Chaves
Esposende
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
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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