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Cheap flights from Houston George Bush Intcntl Airport to Porto from $277

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 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 George Bush Intcntl Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
12:55 pm - 9:05 am
IAH
-
OPO
14h 10m
1 stop
KLM Logo
11:15 am - 11:58 pm
OPO
-
IAH
18h 43m
2 stops
$719KLM
Wed, Nov 11 - Fri, Nov 13
Air Canada Logo
11:55 am - 12:05 pm
IAH
-
OPO
18h 10m
2 stops
Air Canada Logo
6:00 am - 10:53 am
OPO
-
IAH
34h 53m
2 stops
$721Air Canada
Wed, Jan 6 - Fri, Jan 15
United Airlines Logo
6:50 pm - 3:20 pm
IAH
-
OPO
14h 30m
1 stop
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$722United Airlines
Mon, Jan 4 - Fri, Jan 15
KLM Logo
1:15 pm - 9:05 am
IAH
-
OPO
13h 50m
2 stops
KLM Logo
11:15 am - 11:58 pm
OPO
-
IAH
18h 43m
2 stops
$723KLM
Wed, Nov 11 - Fri, Nov 13
United Airlines Logo
10:55 am - 9:30 am
IAH
-
OPO
16h 35m
1 stop
United Airlines Logo
12:35 pm - 10:43 pm
OPO
-
IAH
16h 08m
1 stop
$726United Airlines
Wed, Nov 11 - Fri, Nov 13
United Airlines Logo
9:40 am - 9:30 am
IAH
-
OPO
17h 50m
2 stops
United Airlines Logo
12:35 pm - 1:01 am
OPO
-
IAH
18h 26m
2 stops
$730United Airlines
Wed, Nov 11 - Fri, Nov 13
Multiple Airlines Logo
11:55 am - 12:05 pm
IAH
-
OPO
18h 10m
2 stops
Multiple Airlines Logo
12:35 pm - 2:00 pm
OPO
-
IAH
31h 25m
1 stop
$735Multiple Airlines
Tue, Jan 5 - Thu, Jan 14
United Airlines Logo
6:50 pm - 3:20 pm
IAH
-
OPO
14h 30m
1 stop
United Airlines Logo
12:35 pm - 2:00 pm
OPO
-
IAH
31h 25m
1 stop
$743United Airlines
Mon, Jan 4 - Tue, Jan 12
British Airways Logo
3:50 pm - 4:40 pm
IAH
-
OPO
18h 50m
1 stop
British Airways Logo
6:35 pm - 7:55 pm
OPO
-
IAH
31h 20m
1 stop
$765British Airways
Sun, Jan 3 - Wed, Jan 13
KLM Logo
3:25 pm - 10:40 am
IAH
-
OPO
13h 15m
1 stop
KLM Logo
5:00 am - 2:25 pm
OPO
-
IAH
14h 25m
1 stop
$768KLM
Wed, Oct 21 - Wed, Oct 28

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Lufthansa flights from Houston George Bush Intcntl Airport to Porto

Our best Lufthansa deals on Houston George Bush Intcntl Airport to Porto flight tickets
Lufthansa
Dec 27
IAH4:10 pmHouston George Bush Intcntl
24h 15m
1 stop
OPO10:25 pmPorto
Jan 6
OPO6:00 amPorto
24h 14m
2 stops
IAH12:14 amHouston George Bush Intcntl
$794
Lufthansa
Dec 27
IAH4:10 pmHouston George Bush Intcntl
25h 50m
2 stops
OPO12:00 amPorto
Jan 6
OPO6:00 amPorto
24h 14m
2 stops
IAH12:14 amHouston George Bush Intcntl
$817
Lufthansa
Dec 27
IAH4:10 pmHouston George Bush Intcntl
25h 50m
2 stops
OPO12:00 amPorto
Jan 7
OPO4:10 pmPorto
38h 04m
2 stops
IAH12:14 amHouston George Bush Intcntl
$838

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 16
IAH3:25 pmHouston George Bush Intcntl
20h 45m
1 stop
OPO6:10 pmPorto
Oct 20
OPO5:00 amPorto
14h 20m
1 stop
IAH1:20 pmHouston George Bush Intcntl
$818
Delta
Jul 23
IAH5:05 pmHouston George Bush Intcntl
19h 10m
1 stop
OPO6:15 pmPorto
Jul 30
OPO11:25 amPorto
18h 32m
2 stops
IAH11:57 pmHouston George Bush Intcntl
$1,187
Delta
Jul 23
IAH5:40 amHouston George Bush Intcntl
20h 50m
2 stops
OPO8:30 amPorto
Jul 30
OPO5:00 amPorto
19h 52m
2 stops
IAH6:52 pmHouston George Bush Intcntl
$1,191

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 July 20, 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

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/11

12:55 pm-9:05 am

1 stop14h 10m

Porto

Fri 11/13

11:15 am-11:58 pm

2 stops18h 43m

$719

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 1/6

11:55 am-12:05 pm

2 stops18h 10m

Porto

Fri 1/15

6:00 am-10:53 am

2 stops34h 53m

$721

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 1/4

6:50 pm-3:20 pm

1 stop14h 30m

Porto

Fri 1/15

6:00 am-6:15 pm

1 stop18h 15m

$722

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/11

1:15 pm-9:05 am

2 stops13h 50m

Porto

Fri 11/13

11:15 am-11:58 pm

2 stops18h 43m

$723

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/11

10:55 am-9:30 am

1 stop16h 35m

Porto

Fri 11/13

12:35 pm-10:43 pm

1 stop16h 08m

$726

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 11/11

9:40 am-9:30 am

2 stops17h 50m

Porto

Fri 11/13

12:35 pm-1:01 am

2 stops18h 26m

$730

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 1/5

11:55 am-12:05 pm

2 stops18h 10m

Porto

Thu 1/14

12:35 pm-2:00 pm

1 stop31h 25m

$735

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 1/4

6:50 pm-3:20 pm

1 stop14h 30m

Porto

Tue 1/12

12:35 pm-2:00 pm

1 stop31h 25m

$743

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 1/3

3:50 pm-4:40 pm

1 stop18h 50m

Porto

Wed 1/13

6:35 pm-7:55 pm

1 stop31h 20m

$765
Quickest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 10/21

3:25 pm-10:40 am

1 stop13h 15m

Porto

Wed 10/28

5:00 am-2:25 pm

1 stop14h 25m

$768

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 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 $700.

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

You could potentially save up to 16% 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
1,541 reviews
Search KLM flights
United AirlinesPriceFrom $661Free CancellationRating
7.4
10,011 reviews
Search United Airlines flights

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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?

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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