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Cheap flights from Houston to Portugal from $155

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 Portugal departing on 9/13. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Houston to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
12:55 pm - 8:00 am
IAH
-
LIS
13h 05m
1 stop
Virgin Atlantic Logo
11:15 am - 11:58 pm
LIS
-
IAH
18h 43m
2 stops
$268Virgin Atlantic
Sun, Nov 8 - Sun, Nov 15
Virgin Atlantic Logo
12:21 pm - 10:45 am
IAH
-
LIS
16h 24m
2 stops
Virgin Atlantic Logo
12:45 pm - 11:56 pm
LIS
-
IAH
17h 11m
2 stops
$376Virgin Atlantic
Mon, Sep 14 - Mon, Sep 21
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
$707United Airlines
Mon, Dec 7 - Thu, Dec 10
KLM Logo
4:05 pm - 10:35 am
IAH
-
OPO
12h 30m
1 stop
KLM Logo
5:00 am - 1:05 pm
OPO
-
IAH
14h 05m
1 stop
$708KLM
Sun, Nov 8 - Fri, Nov 13
United Airlines Logo
9:45 am - 9:30 am
IAH
-
OPO
17h 45m
2 stops
United Airlines Logo
6:00 am - 6:15 pm
OPO
-
IAH
18h 15m
1 stop
$711United Airlines
Mon, Dec 7 - Thu, Dec 10
Delta Logo
10:05 am - 9:05 am
HOU
-
OPO
17h 00m
2 stops
Delta Logo
5:00 am - 9:43 pm
OPO
-
HOU
22h 43m
2 stops
$723Delta
Sun, Nov 8 - Fri, Nov 13
Delta Logo
1:00 pm - 11:20 am
HOU
-
LIS
16h 20m
2 stops
Delta Logo
5:00 am - 9:43 pm
LIS
-
HOU
22h 43m
2 stops
$739Delta
Tue, Nov 10 - Wed, Nov 18
British Airways Logo
8:20 pm - 5:45 pm
HOU
-
OPO
39h 25m
2 stops
British Airways Logo
8:40 pm - 7:50 pm
OPO
-
HOU
29h 10m
2 stops
$830British Airways
Mon, Nov 23 - Mon, Nov 30
KLM Logo
5:26 pm - 9:15 am
HOU
-
FNC
33h 49m
2 stops
KLM Logo
7:30 pm - 4:31 pm
FNC
-
HOU
27h 01m
2 stops
$1,045KLM
Tue, Sep 8 - Sat, Sep 19
British Airways Logo
9:05 pm - 12:25 pm
IAH
-
FNC
33h 20m
1 stop
British Airways Logo
1:25 pm - 1:25 pm
FNC
-
IAH
30h 00m
1 stop
$1,166British Airways
Tue, Sep 8 - Sun, Sep 13

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American Airlines flights from Houston to Portugal

Our best American Airlines deals on Houston to Portugal flight tickets
American Airlines
Nov 8
IAH9:28 amHouston George Bush Intcntl
16h 12m
2 stops
OPO7:40 amPorto
Nov 13
OPO12:25 pmPorto
18h 05m
2 stops
IAH12:30 amHouston George Bush Intcntl
$729
American Airlines
Nov 8
HOU10:11 amHouston Hobby
15h 29m
2 stops
OPO7:40 amPorto
Nov 13
OPO8:40 pmPorto
19h 00m
2 stops
HOU9:40 amHouston Hobby
$779
American Airlines
Oct 23
HOU4:15 pmHouston Hobby
17h 45m
2 stops
OPO4:00 pmPorto
Nov 7
OPO8:40 pmPorto
17h 55m
2 stops
HOU8:35 amHouston Hobby
$829

United Airlines flights from Houston to Portugal

Our best United Airlines deals on Houston to Portugal flight tickets
United Airlines
Dec 7
IAH1:35 pmHouston George Bush Intcntl
13h 55m
1 stop
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$707
United Airlines
Dec 7
IAH9:45 amHouston George Bush Intcntl
17h 45m
2 stops
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$711
United Airlines
Dec 6
IAH7:30 amHouston George Bush Intcntl
20h 00m
2 stops
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
18h 15m
1 stop
IAH6:15 pmHouston George Bush Intcntl
$712

momondo Fare Finder

 
Customize your flight search to find flights from Houston 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 26, 2026.
Use the filters below to find and compare flights from Houston to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Sun 11/8

12:55 pm-8:00 am

1 stop13h 05m

Lisbon Humberto Delgado

Sun 11/15

11:15 am-11:58 pm

2 stops18h 43m

$268

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Mon 9/14

12:21 pm-10:45 am

2 stops16h 24m

Lisbon Humberto Delgado

Mon 9/21

12:45 pm-11:56 pm

2 stops17h 11m

$376

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 12/7

1:35 pm-9:30 am

1 stop13h 55m

Porto

Thu 12/10

6:00 am-6:15 pm

1 stop18h 15m

$707
Quickest round-trip

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 11/8

4:05 pm-10:35 am

1 stop12h 30m

Porto

Fri 11/13

5:00 am-1:05 pm

1 stop14h 05m

$708

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 12/7

9:45 am-9:30 am

2 stops17h 45m

Porto

Thu 12/10

6:00 am-6:15 pm

1 stop18h 15m

$711

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Sun 11/8

10:05 am-9:05 am

2 stops17h 00m

Porto

Fri 11/13

5:00 am-9:43 pm

2 stops22h 43m

$723

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Tue 11/10

1:00 pm-11:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Wed 11/18

5:00 am-9:43 pm

2 stops22h 43m

$739

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 11/23

8:20 pm-5:45 pm

2 stops39h 25m

Porto

Mon 11/30

8:40 pm-7:50 pm

2 stops29h 10m

$830

HoustonFunchal

HOU - FNC

HOUFNC

Houston Hobby

Tue 9/8

5:26 pm-9:15 am

2 stops33h 49m

Funchal Madeira

Sat 9/19

7:30 pm-4:31 pm

2 stops27h 01m

$1,045

HoustonFunchal

IAH - FNC

IAHFNC

Houston George Bush Intcntl

Tue 9/8

9:05 pm-12:25 pm

1 stop33h 20m

Funchal Madeira

Sun 9/13

1:25 pm-1:25 pm

1 stop30h 00m

$1,166

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 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 is in April. Flight prices, which tend to average around $404, 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 during December instead. Flights to Portugal in December, while not as cheap as those in April, still average around $466.

How far in advance should I book a flight from Houston to Portugal?

You are more likely to see cheaper flights to Portugal from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $924 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Houston for as low as $636 on momondo.

Cheap Houston to Portugal flight deals and tips

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

Fastest flight time

11h 50m

Direct flights

None
The fastest flight from Houston to Portugal takes 11h 50m
There are no direct flights from Houston to Portugal. There are no popular flight routes from Houston to Portugal.
Search flight deals

Frequently asked questions about flying from Houston to Portugal

  • When did momondo last update prices for flights from Houston to Portugal?

    Prices for flights from Houston to Portugal refresh daily.

  • How many operators does momondo search for flights from Houston to Portugal?

  • How old do you have to be to fly from Houston to Portugal?

    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 to Portugal.

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

    The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Houston to Portugal

Compare and see reviews for airlines that fly from Houston to Portugal with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $466Free CancellationRating
7.8
8,453 reviews
Search Delta flights
KLMPriceFrom $476Free CancellationRating
7.8
1,531 reviews
Search KLM flights
Air FrancePriceFrom $540Free CancellationRating
7.5
1,614 reviews
Search Air France flights
British AirwaysPriceFrom $559Free CancellationRating
6.7
8,072 reviews
Search British Airways flights
United AirlinesPriceFrom $581Free CancellationRating
7.4
9,898 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.4
4,424 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
11,267 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?

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

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

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 Portugal.

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

Yes momondo offers price alerts on flights to Portugal 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.

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Find better results for your trip to Portugal

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