HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$457+ Cheap flights from Galveston, TX to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Galveston to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Galveston to Porto

Cheapest flights from Galveston to Porto
Explore the most affordable flight options available from Galveston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:39 amHOU - OPO
2 stops17h 51mDelta
Tue 12/96:05 amOPO - HOU
2 stops22h 43mDelta
Deal found 10/27$541
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1110:40 amHOU - OPO
2 stops17h 50mDelta
Wed 11/196:00 amOPO - HOU
2 stops23h 07mDelta
Deal found 10/28$741
This KLM deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:48 pmHOU - OPO
2 stops14h 37mKLM
Wed 11/196:00 amOPO - HOU
2 stops23h 07mKLM
Deal found 10/30$747
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:47 pmHOU - OPO
2 stops14h 38mDelta
Sun 12/75:00 amOPO - HOU
2 stops18h 52mDelta
Deal found 10/29$842
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:47 pmHOU - OPO
2 stops18h 33mKLM
Sun 12/75:00 amOPO - HOU
2 stops18h 52mKLM
Deal found 10/28$895
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:39 amHOU - OPO
2 stops17h 51mDelta
Sat 12/136:00 amOPO - HOU
2 stops17h 33mDelta
Deal found 10/30$1,011
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:47 pmHOU - OPO
2 stops14h 38mKLM
Sat 12/136:00 amOPO - HOU
2 stops17h 33mKLM
Deal found 10/28$1,024
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:48 pmHOU - OPO
2 stops14h 37mDelta
Sun 11/1611:15 amOPO - HOU
2 stops18h 25mDelta
Deal found 10/27$1,056
This KLM deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:47 pmHOU - OPO
2 stops14h 38mKLM
Thu 12/186:35 amOPO - HOU
2 stops22h 13mKLM
Deal found 10/29$1,204
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:25 pmHOU - OPO
2 stops25h 00mDelta
Wed 1/711:15 amOPO - HOU
2 stops41h 20mDelta
Deal found 10/28$1,237
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:25 pmHOU - OPO
2 stops18h 00mDelta
Wed 1/76:00 amOPO - HOU
2 stops22h 35mDelta
Deal found 10/28$1,287
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:25 pmHOU - OPO
2 stops25h 00mDelta
Mon 1/511:25 amOPO - HOU
2 stops34h 47mDelta
Deal found 10/28$1,365

Cheap flight deals from Galveston to Porto

Keep the following information in mind while searching for Galveston to Porto flight deals. Data was last updated October 30, 2025.

Round-trip from

$541
(Delta)

One-way from

$457
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$799
From Galveston to Porto
Search Deals
One-way flight from Galveston to Porto
Search Deals
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Galveston 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, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Galveston to Porto that are best for you.

Fly from

Galveston

Fly to

Porto

Route

Depart

Return

Price

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 12/2

10:39 am-10:30 am

2 stops17h 51m

Porto

Tue 12/9

6:05 am-10:48 pm

2 stops22h 43m

$541

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Thu 2/26

12:16 pm-11:45 am

2 stops17h 29m

Porto

Tue 3/3

8:40 pm-7:54 pm

2 stops29h 14m

$719

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 11/11

10:40 am-10:30 am

2 stops17h 50m

Porto

Wed 11/19

6:00 am-11:07 pm

2 stops23h 07m

$741

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 11/12

10:40 am-10:30 am

2 stops17h 50m

Porto

Wed 11/19

6:00 am-5:53 pm

2 stops17h 53m

$741

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 11/12

6:48 pm-3:25 pm

2 stops14h 37m

Porto

Wed 11/19

6:00 am-11:07 pm

2 stops23h 07m

$747

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Wed 12/3

6:47 pm-3:25 pm

2 stops14h 38m

Porto

Sun 12/7

5:00 am-5:52 pm

2 stops18h 52m

$842

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 3/3

6:00 am-10:30 am

2 stops22h 30m

Porto

Sat 3/14

11:15 am-9:32 am

2 stops27h 17m

$869

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Sun 2/15

10:16 am-7:40 am

2 stops15h 24m

$457

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Sun 3/15

1:00 pm-3:25 pm

2 stops21h 25m

$478

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 3/3

5:35 pm-3:25 pm

2 stops15h 50m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 13 results
1
2

Best time to book a flight from Galveston to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Galveston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Galveston to Porto

What is the cheapest month to book a flight from Galveston to Porto?

Currently, November is the cheapest month in which you can book a flight from Galveston to Porto (average of $592). Flying from Galveston to Porto in June is currently the most expensive (average of $1,229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from G4L to OPO?

Find hourly flight availability from Galveston to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s typically best to fly out from Galveston to Porto in the afternoon. Doing so could potentially save you 24% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated October 30, 2025.
Get a feel of what it's like to fly with KLM and United Airlines from Galveston to Porto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,406 reviews

Food

7.3

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,406 reviews
KLM
7.7
Good
1,406 reviews

Food

7.3

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
8,998 reviews
KLM
7.7
Good
1,406 reviews

Food

7.3

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Galveston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Galveston?

    Porto (OPO) is the airport you will fly into if you book a flight from Galveston to Porto. You should not have trouble finding flights to Porto from Galveston; the airport handles an average of 0 inbound flights from Galveston per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the Porto airport from Galveston. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

  • How long is the flight from Galveston to Porto?

    Departing from Galveston to Porto will take you 17h 29m. Galveston and Porto are separated by a distance of 4736 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Galveston to Porto one-way?

    The cheapest airlines for a one-way flight from Galveston to Porto are American Airlines ($457), Delta ($478), and KLM ($478).

  • Can I find deals for flights from Galveston to Porto that include hotel bookings?

    Yes. In addition to deals on Galveston to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Galveston to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Galveston to Porto.

  • Can I find deals for business class flights from Galveston to Porto?

    Yes. Cheapflights offers flight deals from Galveston to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Galveston to Porto?

    Currently, November is the cheapest month in which you can book a flight from Galveston to Porto (average of $592). Flying from Galveston to Porto in June is currently the most expensive (average of $1,229). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Galveston to Porto

Discover the top 3 airlines that operate flights from Galveston to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$629Average$1,175FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$662Average$1,072FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,336FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.