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Cheap flights from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport 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.
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0 bags

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Find the cheapest flights from Houston George Bush Intcntl Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Multiple Airlines Logo
7:00 pm - 1:15 pm
OPO
-
IAH
24h 15m
1 stop
$552Multiple Airlines
Sun, Apr 12 - Mon, Apr 27
KLM Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
KLM Logo
6:50 pm - 1:15 pm
OPO
-
IAH
24h 25m
1 stop
$570KLM
Tue, Apr 14 - Tue, Apr 21
Delta Logo
6:46 pm - 6:20 pm
IAH
-
OPO
17h 34m
2 stops
Delta Logo
5:00 am - 1:15 pm
OPO
-
IAH
14h 15m
1 stop
$580Delta
Tue, Apr 14 - Tue, Apr 21
Delta Logo
5:00 pm - 6:20 pm
IAH
-
OPO
19h 20m
2 stops
Delta Logo
5:00 am - 6:34 pm
OPO
-
IAH
19h 34m
2 stops
$589Delta
Tue, Apr 14 - Tue, Apr 21
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
$599KLM
Mon, May 4 - Mon, May 11
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
British Airways Logo
7:59 pm - 8:20 pm
IAH
-
OPO
18h 21m
2 stops
British Airways Logo
9:10 pm - 7:04 pm
OPO
-
IAH
27h 54m
2 stops
$613British 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
$619KLM
Mon, May 4 - Mon, May 11
American Airlines Logo
6:22 pm - 4:00 pm
IAH
-
OPO
15h 38m
2 stops
American Airlines Logo
8:20 am - 11:59 pm
OPO
-
IAH
21h 39m
2 stops
$620American Airlines
Mon, Apr 6 - Wed, Apr 15
KLM Logo
3:55 pm - 10:00 pm
IAH
-
OPO
24h 05m
1 stop
KLM Logo
4:20 pm - 1:15 pm
OPO
-
IAH
26h 55m
1 stop
$649KLM
Wed, Aug 12 - Tue, Aug 18

KLM flights from Houston George Bush Intcntl Airport to Porto

Our best KLM deals on Houston George Bush Intcntl Airport to Porto flight tickets
KLM
Apr 14
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
Apr 21
OPO6:50 pmPorto
24h 25m
1 stop
IAH1:15 pmHouston George Bush Intcntl
$570
KLM
Apr 6
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
Apr 15
OPO11:45 amPorto
31h 30m
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

Delta flights from Houston George Bush Intcntl Airport to Porto

Our best Delta deals on Houston George Bush Intcntl Airport to Porto flight tickets
Delta
Apr 14
IAH6:46 pmHouston George Bush Intcntl
17h 34m
2 stops
OPO6:20 pmPorto
Apr 21
OPO5:00 amPorto
14h 15m
1 stop
IAH1:15 pmHouston George Bush Intcntl
$580
Delta
Apr 14
IAH5:00 pmHouston George Bush Intcntl
19h 20m
2 stops
OPO6:20 pmPorto
Apr 21
OPO5:00 amPorto
19h 34m
2 stops
IAH6:34 pmHouston George Bush Intcntl
$589
Delta
Apr 6
IAH3:50 pmHouston George Bush Intcntl
17h 35m
1 stop
OPO3:25 pmPorto
Apr 15
OPO5:00 amPorto
19h 34m
2 stops
IAH6:34 pmHouston George Bush Intcntl
$609

momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport 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 March 1, 2026.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport 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

7:00 pm-1:15 pm

1 stop24h 15m

$552

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/14

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Tue 4/21

6:50 pm-1:15 pm

1 stop24h 25m

$570

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/14

6:46 pm-6:20 pm

2 stops17h 34m

Porto

Tue 4/21

5:00 am-1:15 pm

1 stop14h 15m

$580

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/14

5:00 pm-6:20 pm

2 stops19h 20m

Porto

Tue 4/21

5:00 am-6:34 pm

2 stops19h 34m

$589

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 5/4

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 5/11

11:25 am-1:15 pm

1 stop31h 50m

$599

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

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-7:04 pm

2 stops27h 54m

$613

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

$619

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 4/6

6:22 pm-4:00 pm

2 stops15h 38m

Porto

Wed 4/15

8:20 am-11:59 pm

2 stops21h 39m

$620

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 8/12

3:55 pm-10:00 pm

1 stop24h 05m

Porto

Tue 8/18

4:20 pm-1:15 pm

1 stop26h 55m

$649

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 George Bush Intcntl Airport 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

Can stopping save me money on Houston George Bush Intcntl Airport to Porto flights?

You could potentially save up to 1% on your flight if you consider stops on a Houston George Bush Intcntl Airport to Porto flight.

When to book flights from Houston George Bush Intcntl Airport to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Houston George Bush Intcntl Airport to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Houston George Bush Intcntl Airport to Porto (IAH to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Houston George Bush Intcntl Airport to Porto

Fastest flight time

12h 55m

Direct flights

None
The fastest flight from Houston George Bush Intcntl Airport to Porto takes 12h 55m
There are no direct flights from Houston George Bush Intcntl Airport to Porto. There are no popular flight routes from Houston George Bush Intcntl Airport to Porto.
Search flight deals

  • How far is Houston George Bush Intcntl to Porto by plane?

    The straight-line distance from Houston George Bush Intcntl to Porto is 4730.3 mi. Flights usually cover this in 12h 55m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Houston George Bush Intcntl Airport to Porto Airport?

    Prices for flights from Houston George Bush Intcntl Airport to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Houston George Bush Intcntl Airport to Porto Airport?

  • How old do you have to be to fly from Houston George Bush Intcntl Airport to Porto Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Houston George Bush Intcntl Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Houston George Bush Intcntl Airport to Porto?

Best airlines flying from Houston George Bush Intcntl Airport to Porto

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $476Free CancellationRating
7.7
1,461 reviews
Search KLM flights
United AirlinesPriceFrom $642Free CancellationRating
7.4
9,371 reviews
Search United Airlines flights
LufthansaPriceFrom $831Free CancellationRating
6.8
7,818 reviews
Search Lufthansa flights

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Why use momondo?

Why should I use momondo to find a flight deal from Houston to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from Houston.

Can I find flights from Houston to Porto with flexible booking policies on momondo?

All flight searches from Houston to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Houston to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Houston.

I’m not ready to book a flight from Houston to Porto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Houston to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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