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Cheap flights from London Heathrow Airport to Porto from C$ 159

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — OPO
17 Jun — 24 Jun1
1 adult

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 12 June 2025.

Round-trip from

C$ 302

One-way from

C$ 159

Popular in

August

Cheapest in

January

Average price

C$ 375
KLM
  • KLM
  • 2/9-6/9
  • 2 total stops
  • 20h 10m total
  • London to Porto
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1/10
  • 1/10
  • 1 total stop
  • 11h 35m total
  • London to Porto
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
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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 12 June 2025.

Tue 2/92:45 p.m.LHR - OPO
1 stop7h 30mKLM
Sat 6/97:00 p.m.OPO - LHR
1 stop12h 40mKLM
Deal found 10/6C$ 302
Sun 23/118:15 a.m.LHR - OPO
1 stop6h 45mTAP AIR PORTUGAL
Wed 26/114:05 p.m.OPO - LHR
1 stop5h 30mTAP AIR PORTUGAL
Deal found 10/6C$ 324
Mon 23/67:45 a.m.LHR - OPO
1 stop8h 15mBrussels Airlines
Fri 27/612:55 p.m.OPO - LHR
1 stop8h 00mBrussels Airlines
Deal found 11/6C$ 346
Thu 9/106:00 a.m.LHR - OPO
1 stop12h 30mSWISS
Tue 14/1011:50 a.m.OPO - LHR
1 stop9h 40mSWISS
Deal found 11/6C$ 366
Fri 4/78:50 p.m.LHR - OPO
1 stop11h 10mVueling
Mon 7/710:00 p.m.OPO - LHR
1 stop11h 10mVueling
Deal found 10/6C$ 387
Wed 25/69:30 a.m.LHR - OPO
1 stop6h 15mLufthansa
Wed 2/711:10 a.m.OPO - LHR
1 stop8h 30mLufthansa
Deal found 10/6C$ 391
Wed 27/86:45 p.m.LHR - OPO
1 stop12h 50mIberia
Tue 2/910:00 p.m.OPO - LHR
1 stop14h 00mIberia
Deal found 12/6C$ 444
Sat 11/106:45 p.m.LHR - OPO
1 stop12h 50mBritish Airways
Sat 18/1012:20 p.m.OPO - LHR
1 stop5h 55mBritish Airways
Deal found 11/6C$ 450
Wed 18/69:30 a.m.LHR - OPO
1 stop6h 15mMultiple Airlines
Sat 21/64:50 p.m.OPO - LHR
1 stop4h 45mMultiple Airlines
Deal found 10/6C$ 484

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 12 June 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

Tue 2/9

2:45 p.m.-10:15 p.m.

1 stop7h 30m

Porto

Sat 6/9

7:00 p.m.-7:40 a.m.

1 stop12h 40m

C$ 302

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Sun 23/11

8:15 a.m.-3:00 p.m.

1 stop6h 45m

Porto

Wed 26/11

4:05 p.m.-9:35 p.m.

1 stop5h 30m

C$ 324

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Mon 23/6

7:45 a.m.-4:00 p.m.

1 stop8h 15m

Porto

Thu 3/7

12:55 p.m.-8:55 p.m.

1 stop8h 00m

C$ 346

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Thu 9/10

8:40 a.m.-6:30 p.m.

1 stop9h 50m

Porto

Thu 16/10

2:35 p.m.-9:30 p.m.

1 stop6h 55m

C$ 366

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Fri 4/7

8:50 p.m.-8:00 a.m.

1 stop11h 10m

Porto

Mon 7/7

10:00 p.m.-9:10 a.m.

1 stop11h 10m

C$ 387

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Wed 25/6

9:30 a.m.-3:45 p.m.

1 stop6h 15m

Porto

Wed 2/7

11:10 a.m.-7:40 p.m.

1 stop8h 30m

C$ 391

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Wed 27/8

6:45 p.m.-7:35 a.m.

1 stop12h 50m

Porto

Tue 2/9

10:00 p.m.-12:00 p.m.

1 stop14h 00m

C$ 444

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Sat 11/10

6:45 p.m.-7:35 a.m.

1 stop12h 50m

Porto

Sat 18/10

12:20 p.m.-6:15 p.m.

1 stop5h 55m

C$ 450

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Thu 26/6

9:30 a.m.-3:45 p.m.

1 stop6h 15m

Porto

Sat 5/7

2:50 a.m.-8:15 a.m.

1 stop5h 25m

C$ 617

LondonPorto

LHR - OPO

LHROPO

London Heathrow

Wed 1/10

8:00 p.m.-7:35 a.m.

1 stop11h 35m

C$ 159

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 19 results
1
2

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 9 June 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of C$ 483). Flying from London Heathrow Airport to Porto in December is currently the most expensive (average of C$ 775). 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?

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 12 June 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Porto as you normally would.

Rainfall in Porto by month

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

In terms of precipitation, rainfall in Porto ranges from 18.0 - 195.0 mm 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

Plan your trip to Porto by taking into account the average temperature totals 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 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 12 June 2025.
See what other customers who have flown with KLM, SWISS and Brussels Airlines from London to Porto have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
SWISS
7.5
Good
1,623 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Brussels Airlines
7.4
Good
355 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Vueling
7.1
Good
1,169 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
TAP AIR PORTUGAL
7.1
Good
1,885 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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.

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

    Flying on KLM is currently your cheapest option to Porto, with prices starting at C$ 302. Additional round-trip tickets that might be worth considering are offered by TAP AIR PORTUGAL and Brussels Airlines, with the lowest prices starting at C$ 324 and C$ 346, respectively. KLM is priced at 19% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at C$ 175. Vueling flights start at C$ 190 while deals on Brussels Airlines start at C$ 194 one-way.

  • 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Porto (average of C$ 483). Flying from London Heathrow Airport to Porto in December is currently the most expensive (average of C$ 775). 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 London Heathrow Airport?

Book flights to London Heathrow Airport 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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