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Cheap flights from Houston to Portugal from $303

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 3/30. 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
0 bags

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Find the cheapest flights from Houston to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:25 am - 10:30 am
IAH
-
LIS
21h 05m
1 stop
United Airlines Logo
5:05 am - 6:00 pm
LIS
-
IAH
18h 55m
1 stop
$535United Airlines
Tue, Apr 21 - Wed, May 6
Delta Logo
3:50 pm - 11:15 am
IAH
-
LIS
13h 25m
1 stop
Delta Logo
11:55 am - 1:15 pm
LIS
-
IAH
31h 20m
1 stop
$536Delta
Tue, Apr 7 - Wed, Apr 15
Multiple Airlines Logo
5:05 pm - 5:30 pm
IAH
-
LIS
19h 25m
1 stop
Multiple Airlines Logo
4:50 pm - 2:30 pm
LIS
-
IAH
26h 40m
1 stop
$537Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
United Airlines Logo
8:23 am - 9:20 am
IAH
-
LIS
18h 57m
2 stops
United Airlines Logo
5:05 am - 6:00 pm
LIS
-
IAH
18h 55m
1 stop
$538United Airlines
Tue, Apr 21 - Thu, May 7
Delta Logo
3:20 pm - 6:45 pm
IAH
-
LIS
21h 25m
1 stop
Delta Logo
5:00 am - 1:15 pm
LIS
-
IAH
14h 15m
1 stop
$541Delta
Wed, Apr 29 - Sat, May 9
KLM Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
KLM Logo
5:00 am - 1:15 pm
OPO
-
IAH
14h 15m
1 stop
$550KLM
Tue, Apr 7 - Wed, Apr 15
British Airways Logo
4:20 pm - 6:55 pm
HOU
-
LIS
21h 35m
2 stops
British Airways Logo
6:35 pm - 7:50 pm
LIS
-
HOU
30h 15m
2 stops
$558British Airways
Mon, Mar 16 - Mon, Mar 23
KLM Logo
12:40 pm - 10:30 am
IAH
-
OPO
16h 50m
2 stops
KLM Logo
11:45 am - 11:59 pm
OPO
-
IAH
18h 14m
2 stops
$570KLM
Wed, Mar 18 - Wed, Apr 1
Air France Logo
3:50 pm - 3:25 pm
IAH
-
OPO
17h 35m
1 stop
Air France Logo
5:55 am - 1:35 pm
OPO
-
IAH
13h 40m
1 stop
$596Air France
Tue, Apr 7 - Fri, Apr 17
British Airways Logo
4:20 pm - 11:10 pm
HOU
-
LIS
24h 50m
2 stops
British Airways Logo
4:30 pm - 7:51 pm
LIS
-
HOU
33h 21m
2 stops
$613British Airways
Mon, Apr 6 - Thu, Apr 16

British Airways flights from Houston to Portugal

Our best British Airways deals on Houston to Portugal flight tickets
British Airways
Mar 16
HOU4:20 pmHouston Hobby
21h 35m
2 stops
LIS6:55 pmLisbon Humberto Delgado
Mar 23
LIS6:35 pmLisbon Humberto Delgado
30h 15m
2 stops
HOU7:50 pmHouston Hobby
$558
British Airways
Apr 22
IAH3:30 pmHouston George Bush Intcntl
20h 25m
1 stop
LIS5:55 pmLisbon Humberto Delgado
May 3
LIS6:50 pmLisbon Humberto Delgado
24h 35m
1 stop
IAH1:25 pmHouston George Bush Intcntl
$561
British Airways
May 7
IAH9:05 pmHouston George Bush Intcntl
20h 00m
1 stop
LIS11:05 pmLisbon Humberto Delgado
May 10
LIS7:20 amLisbon Humberto Delgado
22h 28m
2 stops
IAH11:48 pmHouston George Bush Intcntl
$599

Lufthansa flights from Houston to Portugal

Our best Lufthansa deals on Houston to Portugal flight tickets
Lufthansa
Mar 11
IAH5:30 pmHouston George Bush Intcntl
16h 20m
1 stop
LIS2:50 pmLisbon Humberto Delgado
Mar 16
LIS12:25 pmLisbon Humberto Delgado
31h 45m
1 stop
IAH3:10 pmHouston George Bush Intcntl
$565
Lufthansa
Mar 16
IAH5:30 pmHouston George Bush Intcntl
16h 20m
1 stop
LIS2:50 pmLisbon Humberto Delgado
Mar 23
LIS12:25 pmLisbon Humberto Delgado
31h 45m
1 stop
IAH3:10 pmHouston George Bush Intcntl
$569
Lufthansa
Mar 9
IAH5:30 pmHouston George Bush Intcntl
24h 20m
1 stop
LIS10:50 pmLisbon Humberto Delgado
Mar 16
LIS12:25 pmLisbon Humberto Delgado
31h 45m
1 stop
IAH3:10 pmHouston George Bush Intcntl
$592

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 February 8, 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

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 4/21

7:25 am-10:30 am

1 stop21h 05m

Lisbon Humberto Delgado

Wed 5/6

5:05 am-6:00 pm

1 stop18h 55m

$535

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 4/7

3:50 pm-11:15 am

1 stop13h 25m

Lisbon Humberto Delgado

Wed 4/15

11:55 am-1:15 pm

1 stop31h 20m

$536

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 3/17

5:05 pm-5:30 pm

1 stop19h 25m

Lisbon Humberto Delgado

Tue 3/24

4:50 pm-2:30 pm

1 stop26h 40m

$537

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Tue 4/21

8:23 am-9:20 am

2 stops18h 57m

Lisbon Humberto Delgado

Thu 5/7

5:05 am-6:00 pm

1 stop18h 55m

$538

HoustonLisbon

IAH - LIS

IAHLIS

Houston George Bush Intcntl

Wed 4/29

3:20 pm-6:45 pm

1 stop21h 25m

Lisbon Humberto Delgado

Sat 5/9

5:00 am-1:15 pm

1 stop14h 15m

$541

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/7

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Wed 4/15

5:00 am-1:15 pm

1 stop14h 15m

$550

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Mon 3/16

4:20 pm-6:55 pm

2 stops21h 35m

Lisbon Humberto Delgado

Mon 3/23

6:35 pm-7:50 pm

2 stops30h 15m

$558

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 3/18

12:40 pm-10:30 am

2 stops16h 50m

Porto

Wed 4/1

11:45 am-11:59 pm

2 stops18h 14m

$570

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/7

3:50 pm-3:25 pm

1 stop17h 35m

Porto

Fri 4/17

5:55 am-1:35 pm

1 stop13h 40m

$596

HoustonLisbon

HOU - LIS

HOULIS

Houston Hobby

Mon 4/6

4:20 pm-11:10 pm

2 stops24h 50m

Lisbon Humberto Delgado

Thu 4/16

4:30 pm-7:51 pm

2 stops33h 21m

$613

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 March. Flight prices, which tend to average around $685, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Portugal from Houston during February instead. Flights to Portugal in February, while not as cheap as those in March, still average around $711.

How far in advance should I book a flight 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 $864 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 $604 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

13h 00m

Direct flights

None
The fastest flight from Houston to Portugal takes 13h 00m
There are no direct flights from Houston to Portugal. There are no popular flight routes from Houston to Portugal.
Search flight deals

  • 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
7.9
8,172 reviews
Search Delta flights
KLMPriceFrom $476Free CancellationRating
7.7
1,450 reviews
Search KLM flights
Air FrancePriceFrom $540Free CancellationRating
7.4
1,531 reviews
Search Air France flights
British AirwaysPriceFrom $559Free CancellationRating
6.7
7,720 reviews
Search British Airways flights
United AirlinesPriceFrom $590Free CancellationRating
7.4
9,256 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $621Free CancellationRating
7.3
4,207 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,698 reviews
Search Air Canada flights
LufthansaPriceFrom $831Free CancellationRating
6.8
7,773 reviews
Search Lufthansa 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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