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Cheap flights from Houston George Bush Intcntl Airport to Porto from $462

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 9/15. 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 George Bush Intcntl Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:30 pm - 9:30 am
IAH
-
OPO
13h 00m
1 stop
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$707United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
1:35 pm - 9:30 am
IAH
-
OPO
13h 55m
1 stop
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$708United Airlines
Mon, Nov 16 - Thu, Nov 19
Multiple Airlines Logo
4:05 pm - 10:30 am
IAH
-
OPO
12h 25m
1 stop
Multiple Airlines Logo
4:10 pm - 1:05 pm
OPO
-
IAH
26h 55m
1 stop
$709Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
United Airlines Logo
12:00 pm - 9:30 am
IAH
-
OPO
15h 30m
2 stops
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$712United Airlines
Mon, Nov 16 - Thu, Nov 19
Multiple Airlines Logo
1:15 pm - 10:30 am
IAH
-
OPO
15h 15m
2 stops
Multiple Airlines Logo
11:15 am - 1:05 pm
OPO
-
IAH
31h 50m
1 stop
$713Multiple Airlines
Sun, Nov 8 - Mon, Nov 16
Delta Logo
9:40 am - 10:30 am
IAH
-
OPO
19h 50m
2 stops
Delta Logo
5:00 am - 1:05 pm
OPO
-
IAH
14h 05m
1 stop
$714Delta
Mon, Oct 26 - Tue, Nov 3
Multiple Airlines Logo
12:10 pm - 12:50 pm
IAH
-
OPO
18h 40m
2 stops
Multiple Airlines Logo
7:20 pm - 9:39 pm
OPO
-
IAH
32h 19m
2 stops
$719Multiple Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
9:45 am - 9:30 am
IAH
-
OPO
17h 45m
2 stops
United Airlines Logo
6:00 am - 8:28 pm
OPO
-
IAH
20h 28m
2 stops
$722United Airlines
Mon, Nov 16 - Thu, Nov 19
Delta Logo
11:50 am - 10:30 am
IAH
-
OPO
16h 40m
2 stops
Delta Logo
5:00 am - 6:28 pm
OPO
-
IAH
19h 28m
2 stops
$723Delta
Wed, Dec 2 - Tue, Dec 8
Multiple Airlines Logo
10:45 pm - 8:00 pm
IAH
-
OPO
16h 15m
2 stops
Multiple Airlines Logo
12:25 pm - 12:30 am
OPO
-
IAH
18h 05m
2 stops
$729Multiple Airlines
Mon, Oct 26 - Tue, Nov 3

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United Airlines flights from Houston George Bush Intcntl Airport to Porto

Our best United Airlines deals on Houston George Bush Intcntl Airport to Porto flight tickets
United Airlines
Nov 16
IAH2:30 pmHouston George Bush Intcntl
13h 00m
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
IAH1:35 pmHouston George Bush Intcntl
13h 55m
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
IAH12:00 pmHouston George Bush Intcntl
15h 30m
2 stops
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$712

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
Oct 26
IAH9:40 amHouston George Bush Intcntl
19h 50m
2 stops
OPO10:30 amPorto
Nov 3
OPO5:00 amPorto
14h 05m
1 stop
IAH1:05 pmHouston George Bush Intcntl
$714
Delta
Dec 2
IAH11:50 amHouston George Bush Intcntl
16h 40m
2 stops
OPO10:30 amPorto
Dec 8
OPO5:00 amPorto
19h 28m
2 stops
IAH6:28 pmHouston George Bush Intcntl
$723
Delta
Nov 8
IAH11:50 amHouston George Bush Intcntl
16h 40m
2 stops
OPO10:30 amPorto
Nov 14
OPO5:00 amPorto
14h 05m
1 stop
IAH1:05 pmHouston George Bush Intcntl
$763

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 June 9, 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

Cheapest round-trip
Quickest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

2:30 pm-9:30 am

1 stop13h 00m

Porto

Thu 11/19

6:00 am-6:15 pm

1 stop18h 15m

$707

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

1:35 pm-9:30 am

1 stop13h 55m

Porto

Thu 11/19

6:00 am-6:15 pm

1 stop18h 15m

$708

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/8

4:05 pm-10:30 am

1 stop12h 25m

Porto

Mon 11/16

4:10 pm-1:05 pm

1 stop26h 55m

$709

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

12:00 pm-9:30 am

2 stops15h 30m

Porto

Thu 11/19

6:00 am-6:15 pm

1 stop18h 15m

$712

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/8

1:15 pm-10:30 am

2 stops15h 15m

Porto

Mon 11/16

11:15 am-1:05 pm

1 stop31h 50m

$713

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/26

9:40 am-10:30 am

2 stops19h 50m

Porto

Tue 11/3

5:00 am-1:05 pm

1 stop14h 05m

$714

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

12:10 pm-12:50 pm

2 stops18h 40m

Porto

Thu 11/19

7:20 pm-9:39 pm

2 stops32h 19m

$719

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 11/16

9:45 am-9:30 am

2 stops17h 45m

Porto

Thu 11/19

6:00 am-8:28 pm

2 stops20h 28m

$722

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 12/2

11:50 am-10:30 am

2 stops16h 40m

Porto

Tue 12/8

5:00 am-6:28 pm

2 stops19h 28m

$723

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 10/26

10:45 pm-8:00 pm

2 stops16h 15m

Porto

Tue 11/3

12:25 pm-12:30 am

2 stops18h 05m

$729

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 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

What is the typical price of a round-trip flight between Houston George Bush Intcntl Airport and Porto?

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from Houston George Bush Intcntl Airport, with most prices found around $0. If you aren’t able to travel during the month of February, then book flights to Porto from Houston George Bush Intcntl Airport during March instead. Flights to Porto in March, while not as cheap as those in February, still average around $698.

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

You could potentially save up to 22% 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 13m

Direct flights

None
The fastest flight from Houston George Bush Intcntl Airport to Porto takes 12h 13m
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

Frequently asked questions about flying from Houston George Bush Intcntl Airport to Porto

  • 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 13m, 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
7.8
1,527 reviews
Search KLM flights
United AirlinesPriceFrom $661Free CancellationRating
7.4
9,796 reviews
Search United Airlines flights

Traveling to a place near Porto?

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Espinho
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Viseu
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Mira
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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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