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Cheap flights from London Heathrow Airport to Porto from C$ 138

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — OPO
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 October 2025.

Round-trip from

C$ 277

One-way from

C$ 138

Popular in

December

Cheapest in

January

Average price

C$ 340
KLM
  • KLM
  • 16/1-18/1
  • 2 total stops
  • 12h 35m total
  • London to Porto
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11/12
  • 11/12
  • 1 total stop
  • 4h 45m total
  • London to Porto
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 3% potential price decrease (C$ 22 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Heathrow to Porto

Enter your travel dates to find the best prices.

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 28 October 2025.

Sat 6/128:40 a.m.LHR - OPO
1 stop6h 45mKLM
Wed 17/1211:15 a.m.OPO - LHR
1 stop5h 45mKLM
Deal found 26/10C$ 280
Sat 29/112:05 p.m.LHR - OPO
1 stop8h 15mKLM
Tue 2/129:55 a.m.OPO - LHR
1 stop7h 05mKLM
Deal found 27/10C$ 281
Tue 25/1110:00 a.m.LHR - OPO
1 stop5h 25mMultiple Airlines
Tue 2/1211:25 a.m.OPO - LHR
1 stop5h 10mMultiple Airlines
Deal found 28/10C$ 285
Mon 3/116:00 a.m.LHR - OPO
1 stop9h 20mTAP AIR PORTUGAL
Thu 13/1110:20 a.m.OPO - LHR
1 stop5h 10mTAP AIR PORTUGAL
Deal found 26/10C$ 302
Fri 5/126:30 a.m.LHR - OPO
1 stop6h 50mMultiple Airlines
Mon 8/1211:25 a.m.OPO - LHR
1 stop5h 10mMultiple Airlines
Deal found 26/10C$ 306
Mon 3/116:00 a.m.LHR - OPO
1 stop7h 00mTAP AIR PORTUGAL
Fri 14/119:00 a.m.OPO - LHR
1 stop13h 40mTAP AIR PORTUGAL
Deal found 26/10C$ 309
Fri 5/1210:00 a.m.LHR - OPO
1 stop5h 25mKLM
Sun 7/1211:15 a.m.OPO - LHR
1 stop4h 50mKLM
Deal found 26/10C$ 310
Tue 4/116:00 a.m.LHR - OPO
1 stop7h 05mTAP AIR PORTUGAL
Thu 4/1210:20 a.m.OPO - LHR
1 stop5h 10mTAP AIR PORTUGAL
Deal found 27/10C$ 329
Sat 1/116:00 a.m.LHR - OPO
1 stop6h 10mTAP AIR PORTUGAL
Wed 5/114:05 p.m.OPO - LHR
1 stop5h 30mTAP AIR PORTUGAL
Deal found 28/10C$ 331
Mon 3/116:00 a.m.LHR - OPO
1 stop7h 00mTAP AIR PORTUGAL
Wed 5/114:05 p.m.OPO - LHR
1 stop5h 30mTAP AIR PORTUGAL
Deal found 27/10C$ 345
Wed 3/1210:00 a.m.LHR - OPO
1 stop5h 25mMultiple Airlines
Mon 8/1211:25 a.m.OPO - LHR
1 stop10h 00mMultiple Airlines
Deal found 28/10C$ 347
Tue 2/126:50 a.m.LHR - OPO
1 stop5h 15mBrussels Airlines
Mon 8/1212:55 p.m.OPO - LHR
1 stop8h 25mBrussels Airlines
Deal found 28/10C$ 355

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow 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 629,999 searches. Data last updated 28 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Porto that are best for you.

Fly from

Heathrow

Fly to

Porto

Route

Depart

Return

Price

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 16/1

6:30 a.m.-1:20 p.m.

1 stop6h 50m

Porto

Sun 18/1

5:00 a.m.-10:45 a.m.

1 stop5h 45m

C$ 277

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 23/1

10:00 a.m.-3:25 p.m.

1 stop5h 25m

Porto

Sun 25/1

5:00 a.m.-10:45 a.m.

1 stop5h 45m

C$ 278

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Tue 6/1

3:45 p.m.-10:25 p.m.

1 stop6h 40m

Porto

Mon 12/1

6:30 a.m.-1:50 p.m.

1 stop7h 20m

C$ 278

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Sat 29/11

2:05 p.m.-10:20 p.m.

1 stop8h 15m

Porto

Tue 2/12

9:55 a.m.-5:00 p.m.

1 stop7h 05m

C$ 281

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 5/12

6:30 a.m.-1:20 p.m.

1 stop6h 50m

Porto

Mon 8/12

11:25 a.m.-4:35 p.m.

1 stop5h 10m

C$ 306

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 5/12

10:00 a.m.-3:25 p.m.

1 stop5h 25m

Porto

Sun 7/12

11:15 a.m.-4:05 p.m.

1 stop4h 50m

C$ 310

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Tue 18/11

6:00 a.m.-1:05 p.m.

1 stop7h 05m

Porto

Fri 21/11

12:00 p.m.-5:30 p.m.

1 stop5h 30m

C$ 329

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Sat 21/3

8:40 a.m.-3:25 p.m.

1 stop6h 45m

Porto

Sun 22/3

5:00 a.m.-12:05 p.m.

1 stop7h 05m

C$ 336

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Mon 9/2

6:00 a.m.-1:00 p.m.

1 stop7h 00m

Porto

Mon 9/2

4:10 p.m.-9:35 p.m.

1 stop5h 25m

C$ 343

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Sun 8/2

8:15 a.m.-2:00 p.m.

1 stop5h 45m

Porto

Mon 9/2

11:30 a.m.-5:30 p.m.

1 stop6h 00m

C$ 343

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 22 results
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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 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 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 round-trip flight from Heathrow to Porto. Price data was last updated on 24 October 2025.

The price you pay for your flight from London Heathrow Airport to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 32 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of C$ 127). Flying from London Heathrow Airport to Porto in August is currently the most expensive (average of C$ 308). 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.

How much does it cost to fly round-trip from London Heathrow Airport to Porto?

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?

    Located just 10.9 km from the city centre, Porto is the airport most travellers will use when flying to Porto from London Heathrow. Booking flights from London Heathrow to Porto (OPO) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

  • How long is the flight from London Heathrow Airport to Porto?

    Departing from London Heathrow Airport to Porto will take you 6h 50m. There are 1297 km between London Heathrow Airport and Porto.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of C$ 127). Flying from London Heathrow Airport to Porto in August is currently the most expensive (average of C$ 308). 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

Travelling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Esposende

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Alternative routes for Heathrow to Porto

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Need flexible booking options for your flight to Porto from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Not ready to book yet? You can track prices for flights from Heathrow to Porto on Cheapflights with our Price Alert feature and get notified when better prices are available.

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