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Cheap flights from Houston George Bush Intcntl Airport to Portugal from $349

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 Portugal departing on 10/13. 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

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

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
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
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
KLM Logo
3:05 pm - 9:35 am
IAH
-
FNC
36h 30m
1 stop
KLM Logo
6:00 pm - 10:48 pm
FNC
-
IAH
34h 48m
2 stops
$907KLM
Mon, Nov 9 - Fri, Nov 13
KLM Logo
4:10 pm - 5:10 pm
IAH
-
FNC
19h 00m
2 stops
KLM Logo
6:00 pm - 1:05 pm
FNC
-
IAH
25h 05m
1 stop
$952KLM
Thu, Nov 12 - Fri, Nov 20
Turkish Airlines Logo
9:00 pm - 3:10 pm
IAH
-
LIS
36h 10m
1 stop
Turkish Airlines Logo
4:10 pm - 1:10 pm
LIS
-
IAH
27h 00m
1 stop
$963Turkish Airlines
Sat, Nov 21 - Mon, Nov 30
British Airways Logo
9:10 pm - 5:55 pm
IAH
-
LIS
14h 45m
1 stop
British Airways Logo
6:45 pm - 1:25 pm
LIS
-
IAH
24h 40m
1 stop
$968British Airways
Mon, Jul 13 - Wed, Jul 22
British Airways Logo
9:10 pm - 11:20 am
IAH
-
FNC
32h 10m
1 stop
British Airways Logo
12:10 pm - 1:25 pm
FNC
-
IAH
31h 15m
1 stop
$1,020British Airways
Mon, Jul 27 - Wed, Aug 12

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British Airways flights from Houston George Bush Intcntl Airport to Portugal

Our best British Airways deals on Houston George Bush Intcntl Airport to Portugal flight tickets
British Airways
Jul 13
IAH9:10 pmHouston George Bush Intcntl
14h 45m
1 stop
LIS5:55 pmLisbon Humberto Delgado
Jul 22
LIS6:45 pmLisbon Humberto Delgado
24h 40m
1 stop
IAH1:25 pmHouston George Bush Intcntl
$968
British Airways
Jul 6
IAH3:30 pmHouston George Bush Intcntl
15h 25m
1 stop
LIS12:55 pmLisbon Humberto Delgado
Jul 27
LIS6:45 pmLisbon Humberto Delgado
24h 40m
1 stop
IAH1:25 pmHouston George Bush Intcntl
$991
British Airways
Jul 29
IAH3:30 pmHouston George Bush Intcntl
16h 40m
1 stop
LIS2:10 pmLisbon Humberto Delgado
Aug 4
LIS11:05 amLisbon Humberto Delgado
17h 44m
1 stop
IAH10:49 pmHouston George Bush Intcntl
$1,009

Finnair flights from Houston George Bush Intcntl Airport to Portugal

Our best Finnair deals on Houston George Bush Intcntl Airport to Portugal flight tickets
Finnair
Aug 16
IAH4:40 pmHouston George Bush Intcntl
24h 45m
2 stops
LIS11:25 pmLisbon Humberto Delgado
Aug 31
LIS4:35 pmLisbon Humberto Delgado
31h 29m
2 stops
IAH6:04 pmHouston George Bush Intcntl
$995
Finnair
Aug 24
IAH2:09 pmHouston George Bush Intcntl
19h 41m
2 stops
LIS3:50 pmLisbon Humberto Delgado
Aug 31
LIS4:35 pmLisbon Humberto Delgado
31h 29m
2 stops
IAH6:04 pmHouston George Bush Intcntl
$1,012

momondo Fare Finder

 
Customize your flight search to find flights from Houston George Bush Intcntl Airport to Portugal 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 Portugal 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 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

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

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 11/9

3:05 pm-9:35 am

1 stop36h 30m

Funchal Madeira

Fri 11/13

6:00 pm-10:48 pm

2 stops34h 48m

$907

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Thu 11/12

4:10 pm-5:10 pm

2 stops19h 00m

Funchal Madeira

Fri 11/20

6:00 pm-1:05 pm

1 stop25h 05m

$952

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sat 11/21

9:00 pm-3:10 pm

1 stop36h 10m

Lisbon Humberto Delgado

Mon 11/30

4:10 pm-1:10 pm

1 stop27h 00m

$963

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 7/13

9:10 pm-5:55 pm

1 stop14h 45m

Lisbon Humberto Delgado

Wed 7/22

6:45 pm-1:25 pm

1 stop24h 40m

$968

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Mon 7/27

9:10 pm-11:20 am

1 stop32h 10m

Funchal Madeira

Wed 8/12

12:10 pm-1:25 pm

1 stop31h 15m

$1,020

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 Portugal from

How to get the cheapest flight ticket from Houston George Bush Intcntl Airport to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Houston George Bush Intcntl Airport is in April. Flight prices, which tend to average around $467, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Portugal from Houston George Bush Intcntl Airport during March instead. Flights to Portugal in March, while not as cheap as those in April, still average around $476.

How far in advance should I book a flight from Houston George Bush Intcntl Airport to Portugal?

You are more likely to see cheaper flights to Portugal from Houston George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $891 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Houston George Bush Intcntl Airport for as low as $656 on momondo.

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

You could potentially save up to 22% on your flight if you consider stops on a Houston George Bush Intcntl Airport to Portugal flight.

Cheap Houston George Bush Intcntl Airport to Portugal flight deals and tips

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

Fastest flight time

12h 13m

Direct flights

None
The fastest flight from Houston George Bush Intcntl Airport to Portugal takes 12h 13m
There are no direct flights from Houston George Bush Intcntl Airport to Portugal. There are no popular flight routes from Houston George Bush Intcntl Airport to Portugal.
Search flight deals

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

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

    Prices for flights from Houston George Bush Intcntl Airport to Portugal refresh daily.

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

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

    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 George Bush Intcntl Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Houston George Bush Intcntl Airport to Portugal

Compare and see reviews for airlines that fly from Houston George Bush Intcntl Airport to Portugal with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $476Free CancellationRating
7.8
1,527 reviews
Search KLM flights
Air FrancePriceFrom $540Free CancellationRating
7.4
1,598 reviews
Search Air France flights
DeltaPriceFrom $541Free CancellationRating
7.9
8,393 reviews
Search Delta flights
British AirwaysPriceFrom $559Free CancellationRating
6.7
8,035 reviews
Search British Airways flights
United AirlinesPriceFrom $581Free CancellationRating
7.4
9,801 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.4
4,409 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
11,154 reviews
Search Air Canada flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Houston to Portugal. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Portugal from Houston on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Houston to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Houston to Portugal flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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