Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Houston to Porto from $337

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 5/3. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Houston to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
KLM Logo
11:25 am - 1:15 pm
OPO
-
IAH
31h 50m
1 stop
$549KLM
Sun, Apr 12 - Mon, Apr 27
Multiple Airlines Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Multiple Airlines Logo
11:25 am - 1:15 pm
OPO
-
IAH
31h 50m
1 stop
$551Multiple Airlines
Sun, Apr 12 - Mon, Apr 27
Multiple Airlines Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Multiple Airlines Logo
11:25 am - 1:15 pm
OPO
-
IAH
31h 50m
1 stop
$552Multiple Airlines
Sun, Apr 12 - Mon, Apr 27
British Airways Logo
7:59 pm - 8:20 pm
IAH
-
OPO
18h 21m
2 stops
British Airways Logo
9:10 pm - 7:15 pm
OPO
-
IAH
28h 05m
1 stop
$596British Airways
Sun, Apr 12 - Mon, Apr 27
KLM Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
KLM Logo
4:20 pm - 1:15 pm
OPO
-
IAH
26h 55m
1 stop
$599KLM
Mon, May 4 - Mon, May 11
British Airways Logo
7:59 pm - 8:20 pm
IAH
-
OPO
18h 21m
2 stops
British Airways Logo
9:10 pm - 7:15 pm
OPO
-
IAH
28h 05m
1 stop
$603British Airways
Sun, Apr 12 - Mon, Apr 27
Delta Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Delta Logo
5:00 am - 6:34 pm
OPO
-
IAH
19h 34m
2 stops
$609Delta
Mon, Apr 6 - Wed, Apr 15
American Airlines Logo
4:20 pm - 4:00 pm
HOU
-
OPO
17h 40m
2 stops
American Airlines Logo
12:25 pm - 11:47 pm
OPO
-
HOU
17h 22m
2 stops
$620American Airlines
Mon, Apr 6 - Wed, Apr 15
American Airlines Logo
4:18 pm - 4:00 pm
HOU
-
OPO
17h 42m
2 stops
American Airlines Logo
12:25 pm - 11:47 pm
OPO
-
HOU
17h 22m
2 stops
$671American Airlines
Wed, Apr 15 - Wed, Apr 22
Delta Logo
5:22 pm - 3:25 pm
HOU
-
OPO
17h 03m
2 stops
Delta Logo
11:15 am - 10:23 am
OPO
-
HOU
28h 08m
2 stops
$775Delta
Mon, Mar 9 - Tue, Mar 17

KLM flights from Houston to Porto

Our best KLM deals on Houston to Porto flight tickets
KLM
Apr 12
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
Apr 27
OPO11:25 amPorto
31h 50m
1 stop
IAH1:15 pmHouston George Bush Intcntl
$549
KLM
May 4
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
May 11
OPO4:20 pmPorto
26h 55m
1 stop
IAH1:15 pmHouston George Bush Intcntl
$599
KLM
May 4
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
May 11
OPO4:20 pmPorto
26h 55m
1 stop
IAH1:15 pmHouston George Bush Intcntl
$619

United Airlines flights from Houston to Porto

Our best United Airlines deals on Houston to Porto flight tickets
United Airlines
Jul 22
IAH10:57 amHouston George Bush Intcntl
13h 58m
1 stop
OPO6:55 amPorto
Jul 28
OPO12:15 pmPorto
30h 51m
2 stops
IAH1:06 pmHouston George Bush Intcntl
$774
United Airlines
Mar 3
IAH1:25 pmHouston George Bush Intcntl
14h 05m
1 stop
OPO9:30 amPorto
Mar 14
OPO12:55 pmPorto
24h 46m
2 stops
IAH8:41 amHouston George Bush Intcntl
$776
United Airlines
Jul 19
IAH12:00 pmHouston George Bush Intcntl
12h 55m
1 stop
OPO6:55 amPorto
Jul 29
OPO2:25 pmPorto
24h 19m
2 stops
IAH8:44 amHouston George Bush Intcntl
$777

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 February 27, 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

Sun 4/12

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 4/27

11:25 am-1:15 pm

1 stop31h 50m

$549

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 4/12

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 4/27

11:25 am-1:15 pm

1 stop31h 50m

$551

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 4/12

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 4/27

11:25 am-1:15 pm

1 stop31h 50m

$552

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 4/12

7:59 pm-8:20 pm

2 stops18h 21m

Porto

Mon 4/27

9:10 pm-7:15 pm

1 stop28h 05m

$596

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 5/4

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 5/11

4:20 pm-1:15 pm

1 stop26h 55m

$599

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 4/12

7:59 pm-8:20 pm

2 stops18h 21m

Porto

Mon 4/27

9:10 pm-7:15 pm

1 stop28h 05m

$603

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 4/6

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Wed 4/15

5:00 am-6:34 pm

2 stops19h 34m

$609

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 4/6

4:20 pm-4:00 pm

2 stops17h 40m

Porto

Wed 4/15

12:25 pm-11:47 pm

2 stops17h 22m

$620

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 4/15

4:18 pm-4:00 pm

2 stops17h 42m

Porto

Wed 4/22

12:25 pm-11:47 pm

2 stops17h 22m

$671

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 3/9

5:22 pm-3:25 pm

2 stops17h 03m

Porto

Tue 3/17

11:15 am-10:23 am

2 stops28h 08m

$775

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $592. 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

12h 56m

Direct flights

None
The fastest flight from Houston to Porto takes 12h 56m
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 12h 56m.

  • 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
7.7
1,460 reviews
Search KLM flights
United AirlinesPriceFrom $642Free CancellationRating
7.4
9,351 reviews
Search United Airlines flights
LufthansaPriceFrom $831Free CancellationRating
6.8
7,815 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
Matosinhos
Braga
Aveiro
Esposende
Lamego
Guimarães
Pinhao
Chaves
Espinho
Arcos de Valdevez
Viseu
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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 3/29
Sun 4/5
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal