Cheap Flights from Houston (HOUA) to Porto (OPO)

Compare Houston to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

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Flight deals from Houston to Porto

Looking for a cheap last-minute deal or the best return flight from Houston to Porto? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Houston to Porto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston to Porto flights are currently cheapest in November.

Houston to Porto: Alternative routes

Compare routes from Houston to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

Houston to Porto: Flight information

The things to know before you go.
Cheapest flight found$880
Cheapest month to flyNovember

Finding cheap flights from Houston to Porto: Frequently asked questions

The best price we found for a return flight from Houston to Porto is $883. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Houston to Porto. But we found flights with one stop from $883.
As of August 2025, there are no flights flying from Houston to Porto.
The cheapest month to fly from Houston to Porto is usually November.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Houston to Porto Airport on Wednesday, 12 November 2025.
No airlines currently offer direct flights between Houston and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Porto is United .

Flying from Houston to Porto Airport (OPO): What you need to know

  • There are a couple of airports you can start your trip from in Houston. Explore your options departing from George Bush Intercontinental Airport (IAH) or William P. Hobby Airport (HOU) when organising your flight from Houston to Porto Airport (OPO).

  • The timezone in Porto is UTC+0, which is five hours ahead of Houston. Porto Airport is located in Porto.

  • To ensure you get on your flight from Houston to OPO, allow plenty of time to navigate the airport and find your gate. Arriving two hours before international departures and an hour before domestic flights is the general rule.

  • Peak travel periods mean busier airports, so plan to arrive even earlier. Give yourself at least two hours before a domestic flight and four hours for an international journey to keep to your schedule.

Airports in Houston

George Bush Intercontinental Airport (IAH)

  • We make it simple to find cheap flights from Houston to OPO with a stopover. To explore the options departing from George Bush Intercontinental Airport (IAH), uncheck 'Direct flights only.' Then, select a flight offering a stop long enough to tour the city of your choice. Some popular stopovers between IAH and OPO include:

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • Located around 27 kilometres from central Houston, IAH can be reached in about 20 minutes by car (depending on traffic). The journey on public transport will take roughly 50 minutes.

  • In search of a comfortable hotel near George Bush Intercontinental Airport? If you've booked an early flight from Houston to Porto Airport, these accommodation options will have you sleeping moments from your check-in counter:

  • 78.42% of flights that leave from George Bush Intercontinental Airport make it to their destination on schedule.

  • The address for IAH is 16930 JFK Boulevard.

William P. Hobby Airport (HOU)

About Porto Airport (OPO)

Getting from Porto Airport (OPO) to central Porto

  • Porto Airport to the centre of Porto is around 11 kilometres. If you're renting a car or getting a cab, plan ahead to make your trip as smooth as possible. Journey times may vary based on traffic conditions and the time of day.

  • Travelling by public transport takes about 50 minutes.

How to find the cheapest flights from Houston to Porto Airport (OPO)

  • At the moment, $475 is the best price we've found for a one-way ticket from Houston to Porto Airport. The cheapest price for a return flight is $883. Keep in mind fares may change due to availability at the time of booking.

  • To pick up cheap flights from Houston to OPO, book in advance. Airlines typically offer lower prices when flights are first released.

  • The 'Whole month' search tool will show you the cheapest Houston to Porto Airport tickets across the entire month. It's an easy way to snap up a bargain if your dates aren't set in stone.

  • Save time looking for cheap flight tickets from Houston to OPO by setting up a Price Alert. We'll send you an email or notification on the app when a lower fare becomes available.

  • Find a cheap flight from Houston to Porto Airport by using the search filters. Choose your ideal times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Houston to Porto Airport (OPO)

  • Think about the kind of holiday you want when planning your trip dates. February is the quietest month to visit Porto. August is when most people book flights from Houston to Porto Airport (OPO), which may be ideal if you're after more excitement.

  • The warmest month in Porto is August, with temperatures ranging between 14ºC (57ºF) and 32ºC (90ºF). Lock in your Houston to OPO flight ticket then if this is the type of weather you enjoy.

  • If you want to travel in cooler conditions, search for a cheap ticket from Houston to Porto Airport in January when temperatures are between 3ºC (37ºF) and 14ºC (57ºF).

More about Porto

  • When it comes to searching for somewhere to lay your head, you'll find the top stays in Porto right here. Browse these hotels as soon as you've locked in your flight from Houston to Porto Airport:

  • There are loads of awesome things to do in Porto when you're ready to see the sights. Kick things off at Ribeira District followed by Rio Douro and Livraria Lello.

Explore more of Portugal

  • You've done Porto, now it's time to explore other corners of Portugal. Journey around 290 kilometres south to Lisbon to check off its leading sights. From belém to Pasteis de Belém and Real Mosteiro de Santa Maria de Belém, you've got a jam-packed schedule ahead.

  • If you're looking to explore another major stop in Portugal, consider Amadora, about 274 kilometres south of Porto. Roman Villa, Park Fonte das Avencas and Park Fantasia are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.