What are the cheapest airlines flying from London Heathrow Airport to Porto round-trip?

Cheapflights users have booked flights from London Heathrow Airport to Porto round-trip from £108. Other airlines that can offer you cheap pricing are TAP AIR PORTUGAL, from £142, and KLM, from £157. Users have found that Vueling is 44% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from London Heathrow Airport to Porto one-way?

The cheapest airline one-way is Vueling, with whom users have recently found tickets for as low as £65. However, be on the lookout for offers from TAP AIR PORTUGAL and KLM, as they are both options that can get you from London Heathrow Airport to Porto for a low price.

What are the most popular airlines that fly from London Heathrow Airport to Porto?

Before booking your flight from London Heathrow Airport to Porto check out the most popular airlines for this route: British Airways, Ryanair or Iberia.

What is the cheapest day to fly round-trip from London Heathrow Airport to Porto?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 22% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from London Heathrow Airport to Porto?

To save up to 37% on this flight, we recommend booking at least 33 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from London Heathrow Airport to Porto from £142 1-2 weeks out and tickets from £208 for flights departing within the next 72 hours.

What is the cheapest month to fly from London Heathrow Airport to Porto?

January can be a great time to fly to Porto from London Heathrow Airport with a flight ticket averaging about £139. Cheapflights users have found deals in the month of January for as cheap as £29. The most expensive prices can be found in the month of August.

What airport do you fly into for flights to Porto from London Heathrow?

Most people fly into Porto (OPO) if they book a flight to Porto from London Heathrow. On average, Porto has 0 inbound flights from London Heathrow per day from 10 airlines. Porto is conveniently located just 6.8 mi from Porto’s city center.

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

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

How can I find direct flights from Heathrow to Porto?

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

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

Yes. Cheapflights offers flight deals from Heathrow 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.

£65+ Flights from London Heathrow Airport to Porto - Compare & Save Big

Cheapflights Tip: The best prices from London Heathrow to Porto are usually found in January or November, booked 70 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Heathrow to Porto

Round-trip from	£108
One-way from	£65
Popular in	August
Cheapest in	January
Average price	£192

Vueling
15/5-23/5
2 total stops
15h 45m total
London to Porto

Search Deals

Vueling
15/5
1 total stop
4h 35m total
London to Porto

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£30 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Heathrow to Porto

Cheapest flights from Heathrow to Porto
Explore the most affordable flight options available from Heathrow to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Wed 7/506:00LHR - OPO

1 stop14h 25mMultiple Airlines

Wed 14/508:40OPO - LHR

1 stop11h 25mMultiple Airlines

Deal found 29/4£136

Fri 17/1019:50LHR - OPO

1 stop14h 45mTAP AIR PORTUGAL

Sat 25/1021:15OPO - LHR

1 stop15h 10mTAP AIR PORTUGAL

Deal found 28/4£142

Tue 27/520:50LHR - OPO

1 stop11h 10mVueling

Tue 3/622:00OPO - LHR

1 stop11h 10mVueling

Deal found 29/4£143

Thu 12/619:45LHR - OPO

1 stop12h 40mAir France

Thu 26/616:20OPO - LHR

1 stop15h 40mAir France

Deal found 28/4£153

Thu 12/611:45LHR - OPO

1 stop10h 30mKLM

Thu 19/620:20OPO - LHR

1 stop11h 20mKLM

Deal found 28/4£157

Fri 12/920:00LHR - OPO

1 stop11h 35mIberia

Thu 18/922:00OPO - LHR

1 stop11h 05mIberia

Deal found 28/4£165

Mon 19/507:25LHR - OPO

1 stop15h 55mLufthansa

Thu 29/506:15OPO - LHR

1 stop13h 25mLufthansa

Deal found 28/4£177

Tue 20/511:05LHR - OPO

1 stop4h 55mBrussels Airlines

Tue 27/512:55OPO - LHR

1 stop8h 00mBrussels Airlines

Deal found 28/4£187

Thu 8/512:10LHR - OPO

1 stop6h 20mSWISS

Tue 13/510:05OPO - LHR

1 stop6h 30mSWISS

Deal found 29/4£215

Best flights from Heathrow to Porto
Discover carefully curated flight deals from Heathrow to Porto that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 April 2025.

Thu 15/515:30LHR - OPO

1 stop4h 35mVueling

Fri 23/522:00OPO - LHR

1 stop11h 10mVueling

Deal found 29/4£108

Thu 15/515:30LHR - OPO

1 stop4h 35mMultiple Airlines

Thu 22/512:15OPO - LHR

1 stop5h 35mMultiple Airlines

Deal found 29/4£137

Fri 17/1019:50LHR - OPO

1 stop14h 45mTAP AIR PORTUGAL

Sat 25/1021:15OPO - LHR

1 stop15h 10mTAP AIR PORTUGAL

Deal found 28/4£142

Thu 12/611:45LHR - OPO

1 stop10h 30mKLM

Thu 19/620:20OPO - LHR

1 stop11h 20mKLM

Deal found 28/4£157

Fri 12/920:00LHR - OPO

1 stop11h 35mIberia

Thu 18/922:00OPO - LHR

1 stop11h 05mIberia

Deal found 28/4£165

Thu 29/519:45LHR - OPO

1 stop12h 40mAir France

Wed 4/616:20OPO - LHR

1 stop5h 05mAir France

Deal found 28/4£169

Mon 19/506:55LHR - OPO

1 stop16h 25mLufthansa

Fri 23/506:15OPO - LHR

1 stop16h 25mLufthansa

Deal found 28/4£177

Tue 20/511:05LHR - OPO

1 stop4h 55mBrussels Airlines

Tue 27/512:55OPO - LHR

1 stop8h 00mBrussels Airlines

Deal found 28/4£187

Mon 2/606:00LHR - OPO

1 stop12h 15mSWISS

Fri 6/619:20OPO - LHR

1 stop26h 25mSWISS

Deal found 29/4£189

Last-minute flights from Heathrow to Porto
Discover last-minute flight deals from Heathrow to Porto. Data last updated 29 April 2025 and is based on user searches.

Tue 6/506:00LHR - OPO

1 stop13h 00mTAP AIR PORTUGAL

Wed 7/508:55OPO - LHR

1 stop13h 05mTAP AIR PORTUGAL

Deal found 28/4£154

Tue 6/513:30LHR - OPO

2 stops9h 50mLufthansa

Sun 11/506:00OPO - LHR

1 stop9h 40mLufthansa

Deal found 28/4£295

Tue 6/515:35LHR - OPO

2 stops19h 25mScandinavian Airlines

Sun 11/505:00OPO - LHR

2 stops14h 55mScandinavian Airlines

Deal found 28/4£4,970

Wed 7/506:00LHR - OPO

1 stop14h 25mMultiple Airlines

Wed 14/508:40OPO - LHR

1 stop11h 25mMultiple Airlines

Deal found 29/4£136

Wed 7/520:50LHR - OPO

1 stop11h 10mVueling

Sat 10/508:35OPO - LHR

1 stop11h 30mVueling

Deal found 29/4£152

Thu 8/519:45LHR - OPO

1 stop12h 40mAir France

Sun 11/506:35OPO - LHR

1 stop12h 00mAir France

Deal found 28/4£214

Thu 8/508:40LHR - OPO

1 stop9h 50mSWISS

Tue 13/510:05OPO - LHR

1 stop8h 25mSWISS

Deal found 29/4£215

Thu 8/509:55LHR - OPO

1 stop6h 20mIberia

Sun 11/516:55OPO - LHR

1 stop16h 15mIberia

Deal found 28/4£356

Thu 8/512:15LHR - OPO

1 stop10h 25mAegean Airlines

Sat 10/500:35OPO - LHR

1 stop10h 40mAegean Airlines

Deal found 29/4£704

Thu 8/512:10LHR - OPO

1 stop6h 20mSWISS

Tue 13/510:05OPO - LHR

1 stop6h 30mSWISS

Deal found 29/4£215

Fri 9/506:50LHR - OPO

1 stop9h 10mBrussels Airlines

Sat 10/516:50OPO - LHR

1 stop4h 45mBrussels Airlines

Deal found 29/4£204

Mon 12/506:00LHR - OPO

1 stop14h 25mTAP AIR PORTUGAL

Thu 26/610:00OPO - LHR

1 stop12h 55mTAP AIR PORTUGAL

Deal found 28/4£148

One-way flights from Heathrow to Porto
Search for one-way flight options from Heathrow to Porto. Find affordable one-way fares based on user searches. Data last updated 29 April 2025.

Thu 15/515:30LHR - OPO

1 stop4h 35mVueling

Deal found 29/4£65

Thu 15/515:30LHR - OPO

1 stop4h 55mMultiple Airlines

Deal found 29/4£66

Mon 15/906:00LHR - OPO

1 stop9h 20mTAP AIR PORTUGAL

Deal found 27/4£82

Tue 3/611:45LHR - OPO

1 stop6h 10mKLM

Deal found 28/4£98

Fri 30/520:05LHR - OPO

1 stop11h 50mSWISS

Deal found 28/4£102

Tue 20/520:50LHR - OPO

1 stop11h 10mIberia

Deal found 29/4£103

Thu 8/514:45LHR - OPO

1 stop5h 45mEurowings

Deal found 28/4£125

Sat 2/819:55LHR - OPO

1 stop20h 40mAir Serbia

Deal found 28/4£157

Wed 21/511:05LHR - OPO

1 stop5h 20mBrussels Airlines

Deal found 29/4£169

Sun 18/507:30LHR - OPO

2 stops15h 50mLufthansa

Deal found 29/4£201

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Thu 15/5

15:30-20:05

1 stop4h 35m

Porto

Thu 22/5

12:15-17:50

1 stop5h 35m

£137

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 17/10

19:50-10:35

1 stop14h 45m

Porto

Sat 25/10

21:15-12:25

1 stop15h 10m

£142

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Tue 27/5

20:50-08:00

1 stop11h 10m

Porto

Tue 3/6

22:00-09:10

1 stop11h 10m

£143

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Thu 12/6

19:45-08:25

1 stop12h 40m

Porto

Thu 26/6

16:20-08:00

1 stop15h 40m

£153

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Thu 12/6

11:45-22:15

1 stop10h 30m

Porto

Thu 19/6

20:20-07:40

1 stop11h 20m

£157

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 12/9

20:00-07:35

1 stop11h 35m

Porto

Thu 18/9

22:00-09:05

1 stop11h 05m

£165

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Mon 19/5

07:25-23:20

1 stop15h 55m

Porto

Thu 29/5

06:15-19:40

1 stop13h 25m

£177

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Tue 20/5

11:05-16:00

1 stop4h 55m

Porto

Tue 27/5

12:55-20:55

1 stop8h 00m

£187

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Wed 21/5

07:00-13:45

1 stop6h 45m

Porto

Thu 29/5

19:20-07:55

1 stop12h 35m

£214

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Wed 7/5

09:50-16:35

1 stop6h 45m

£72

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 19 results

Best time to book a flight from Heathrow to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Heathrow with our price prediction graph.

Estimated return 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 London Heathrow Airport to Porto

How far ahead should I book a flight from London Heathrow Airport to Porto?

The best time to book flights from London Heathrow Airport to Porto is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Porto?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of £66). Flying from London Heathrow Airport to Porto in August is currently the most expensive (average of £258). 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 LHR to OPO?

Unlike in the morning, when flights are generally more expensive, you can save up to 16% on flights from London Heathrow Airport to Porto by exploring options for tickets at midday.

What is the cheapest day to fly from London Heathrow Airport to Porto?

Travellers seeking maximum savings on their London Heathrow Airport to Porto flight should consider departing on Sunday at midday when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Porto by month

In terms of precipitation, rainfall in Porto ranges from 18.0 - 195.0 inches per month. December is typically the wettest month, when rainfall can reach 195.0 mm. July is typically the driest time to visit Porto when rainfall is around 18.0 mm.

Temperature in Porto by month

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 9.0 C).

Reviews of airlines servicing Porto

Get a feel of what it's like to fly with KLM, SWISS and Air France from London 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

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

KLM

7.8

Good

1,333 reviews

KLM

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

SWISS

7.5

Good

1,588 reviews

KLM

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Air France

7.4

Good

1,446 reviews

KLM

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Brussels Airlines

7.4

Good

346 reviews

KLM

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Vueling

7.1

Good

1,159 reviews

KLM

7.8

Good

1,333 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Related info for your journey

What airport do you fly into for flights to Porto from London Heathrow?
Most people fly into Porto (OPO) if they book a flight to Porto from London Heathrow. On average, Porto has 0 inbound flights from London Heathrow per day from 10 airlines. Porto is conveniently located just 6.8 mi from Porto’s city center.
What are the cheapest airlines flying from London Heathrow Airport to Porto round-trip?
Cheapflights users have booked flights from London Heathrow Airport to Porto round-trip from £108. Other airlines that can offer you cheap pricing are TAP AIR PORTUGAL, from £142, and KLM, from £157. Users have found that Vueling is 44% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from London Heathrow Airport to Porto one-way?
The cheapest airline one-way is Vueling, with whom users have recently found tickets for as low as £65. However, be on the lookout for offers from TAP AIR PORTUGAL and KLM, as they are both options that can get you from London Heathrow Airport to Porto for a low price.
Can I find deals for flights from Heathrow to Porto that include hotel bookings?
Yes. In addition to deals on Heathrow to Porto flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Porto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Porto.
Can I find deals for business class flights from Heathrow to Porto?
Yes. Cheapflights offers flight deals from Heathrow 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 London Heathrow Airport to Porto?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of £66). Flying from London Heathrow Airport to Porto in August is currently the most expensive (average of £258). 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

Coimbra

Viseu

Guimarães

Vila Nova de Gaia

Aveiro

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Top 10 airlines flying from Heathrow to Porto

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£63	Average£97	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
easyJet	Cheapest£69	Average£174	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
British Airways	Cheapest£105	Average£264	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Vueling	Cheapest£106	Average£204	FlexibilityNo cancel fee	On-time88%	Search Vueling flights
TAP AIR PORTUGAL	Cheapest£117	Average£194	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
KLM	Cheapest£131	Average£157	FlexibilityNo cancel fee	On-time75%	Search KLM flights
SWISS	Cheapest£132	Average£171	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Iberia	Cheapest£139	Average£255	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Lufthansa	Cheapest£140	Average£194	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Brussels Airlines	Cheapest£174	Average£290	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Porto?

Cheapflights makes it easy to find Heathrow to Porto flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Porto?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Porto.

Can Cheapflights find flights from Heathrow to Porto with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Porto, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Porto become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Porto flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London Heathrow Airport to Porto from £65

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Porto are usually found in January or November, booked 70 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Heathrow to Porto

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to Porto

Cheapest flights from Heathrow to PortoExplore the most affordable flight options available from Heathrow to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Explore the most affordable flight options available from Heathrow to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Porto that are best for you.

Best time to book a flight from Heathrow to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Porto

How far ahead should I book a flight from London Heathrow Airport to Porto?

Use this chart to determine the optimal time to book a return flight from Heathrow to Porto. Price data was last updated on 25 April 2025.

What is the cheapest month to book a flight from London Heathrow Airport to Porto?

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

Find hourly flight availability from Heathrow 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 29 April 2025.

What is the cheapest day to fly from London Heathrow Airport to Porto?

Use this chart to determine the cheapest time to fly return from Heathrow to Porto. Price data was last updated on 16 December 2024.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

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 29 April 2025.

Get a feel of what it's like to fly with KLM, SWISS and Air France from London 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.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 London Heathrow?

What are the cheapest airlines flying from London Heathrow Airport to Porto round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to Porto one-way?

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

How can I find direct flights from Heathrow to Porto?

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

What is the cheapest month to book a flight from London Heathrow Airport to Porto?

Travelling to a place near London Heathrow Airport?

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.

Alternative routes for Heathrow to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Heathrow to Porto

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Porto?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Porto?

Can Cheapflights find flights from Heathrow to Porto with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Porto become cheaper?

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Cheapest flights from Heathrow to Porto
Explore the most affordable flight options available from Heathrow to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.