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Cheap flights from Porto to London from £48

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to London departing on 6/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Porto to London

Cheap return flights

Logo
14:35 - 20:35OPO-LHR
6h 00m1 stop
Logo
09:55 - 21:15LHR-OPO
11h 20m1 stop
£137
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Wed, 10 Dec - Thu, 11 Dec
Vueling Logo
22:00 - 09:10OPO-LHR
11h 10m1 stop
Vueling Logo
20:50 - 08:00LHR-OPO
11h 10m1 stop
£139Vueling
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Fri, 19 Sep - Tue, 30 Sep
Vueling Logo
22:00 - 09:10OPO-LHR
11h 10m1 stop
Vueling Logo
20:50 - 08:00LHR-OPO
11h 10m1 stop
£146Vueling
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Mon, 22 Sep - Tue, 30 Sep
TAP AIR PORTUGAL Logo
22:35 - 12:45OPO-LHR
14h 10m1 stop
TAP AIR PORTUGAL Logo
08:00 - 19:00LHR-OPO
11h 00m1 stop
£157TAP AIR PORTUGAL
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Fri, 5 Sep - Sun, 14 Sep
KLM Logo
16:10 - 20:50OPO-LHR
4h 40m1 stop
KLM Logo
10:00 - 15:25LHR-OPO
5h 25m1 stop
£160KLM
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Mon, 22 Dec - Tue, 6 Jan
TAP AIR PORTUGAL Logo
10:00 - 17:45OPO-LHR
7h 45m1 stop
TAP AIR PORTUGAL Logo
06:00 - 17:00LHR-OPO
11h 00m1 stop
£160TAP AIR PORTUGAL
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Fri, 12 Sep - Mon, 15 Sep
Air Serbia Logo
10:50 - 12:30OPO-LHR
25h 40m1 stop
Air Serbia Logo
13:30 - 16:35LHR-OPO
27h 05m1 stop
£179Air Serbia
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Thu, 28 Aug - Sat, 30 Aug
British Airways Logo
20:40 - 09:15OPO-LHR
12h 35m1 stop
British Airways Logo
10:45 - 07:40LHR-OPO
20h 55m1 stop
£189British Airways
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Sat, 20 Dec - Wed, 7 Jan
KLM Logo
06:40 - 19:25OPO-LHR
12h 45m1 stop
KLM Logo
20:55 - 10:40LHR-OPO
13h 45m1 stop
£191KLM
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Fri, 19 Sep - Mon, 22 Sep
British Airways Logo
20:40 - 09:15OPO-LHR
12h 35m1 stop
British Airways Logo
13:25 - 07:40LHR-OPO
18h 15m1 stop
£194British Airways
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Mon, 22 Dec - Fri, 2 Jan

KLM flights from Porto to London Heathrow Airport

Our best KLM deals on Porto to London Heathrow Airport flight tickets
KLM
22 Dec
OPO16:10Porto
4h 40m
1 stop
LHR20:50London Heathrow
6 Jan
LHR10:00London Heathrow
5h 25m
1 stop
OPO15:25Porto
£160
Find similar
KLM
19 Sept
OPO06:40Porto
12h 45m
1 stop
LHR19:25London Heathrow
22 Sept
LHR20:55London Heathrow
13h 45m
1 stop
OPO10:40Porto
£191
Find similar
KLM
23 Dec
OPO06:05Porto
14h 45m
1 stop
LHR20:50London Heathrow
27 Dec
LHR06:30London Heathrow
15h 55m
1 stop
OPO22:25Porto
£192
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British Airways flights from Porto to London Heathrow Airport

Our best British Airways deals on Porto to London Heathrow Airport flight tickets
British Airways
20 Dec
OPO20:40Porto
12h 35m
1 stop
LHR09:15London Heathrow
7 Jan
LHR10:45London Heathrow
20h 55m
1 stop
OPO07:40Porto
£189
Find similar
British Airways
22 Dec
OPO20:40Porto
12h 35m
1 stop
LHR09:15London Heathrow
2 Jan
LHR13:25London Heathrow
18h 15m
1 stop
OPO07:40Porto
£194
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momondo Fare Finder

 
Customise your flight search to find flights from Porto to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 2 August 2025.
Use the filters below to find and compare flights from Porto to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoLondon

OPO - LHR

OPOLHR

Porto

Wed 10/12

14:35-20:35

1 stop6h 00m

London Heathrow

Thu 11/12

09:55-21:15

1 stop11h 20m

£137

PortoLondon

OPO - LHR

OPOLHR

Porto

Fri 19/9

22:00-09:10

1 stop11h 10m

London Heathrow

Tue 30/9

20:50-08:00

1 stop11h 10m

£139

PortoLondon

OPO - LHR

OPOLHR

Porto

Mon 22/9

22:00-09:10

1 stop11h 10m

London Heathrow

Tue 30/9

20:50-08:00

1 stop11h 10m

£146

PortoLondon

OPO - LHR

OPOLHR

Porto

Fri 5/9

22:35-12:45

1 stop14h 10m

London Heathrow

Sun 14/9

08:00-19:00

1 stop11h 00m

£157

PortoLondon

OPO - LHR

OPOLHR

Porto

Mon 22/12

16:10-20:50

1 stop4h 40m

London Heathrow

Tue 6/1

10:00-15:25

1 stop5h 25m

£160

PortoLondon

OPO - LHR

OPOLHR

Porto

Fri 12/9

10:00-17:45

1 stop7h 45m

London Heathrow

Mon 15/9

06:00-17:00

1 stop11h 00m

£160

PortoLondon

OPO - LHR

OPOLHR

Porto

Thu 28/8

10:50-12:30

1 stop25h 40m

London Heathrow

Sat 30/8

13:30-16:35

1 stop27h 05m

£179

PortoLondon

OPO - LHR

OPOLHR

Porto

Sat 20/12

20:40-09:15

1 stop12h 35m

London Heathrow

Wed 7/1

10:45-07:40

1 stop20h 55m

£189

PortoLondon

OPO - LHR

OPOLHR

Porto

Fri 19/9

06:40-19:25

1 stop12h 45m

London Heathrow

Mon 22/9

20:55-10:40

1 stop13h 45m

£191

PortoLondon

OPO - LHR

OPOLHR

Porto

Mon 22/12

20:40-09:15

1 stop12h 35m

London Heathrow

Fri 2/1

13:25-07:40

1 stop18h 15m

£194

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Porto to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Porto and London Heathrow Airport?

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

In general, May is the cheapest month to fly from Porto to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £126. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Porto averaging around £132.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Porto is on a Thursday. momondo users have found tickets for Thursday departures for as low as £181. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £227.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Porto to London Heathrow Airport in the morning for as low as £121. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £194 on average. Flights to London Heathrow Airport from Porto in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Porto when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £189 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Porto for as low as £122 on momondo.

How have Porto to London Heathrow Airport flight prices changed over time?

As of August 2025, prices for Porto to London Heathrow Airport flights are approximately 14% more expensive when compared to flights at the same time last year.

When to book flights from Porto to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Porto to London Heathrow Airport (OPO to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to London Heathrow Airport

Best price found

£48

Fastest flight time

4h 40m

Direct flights

None
The best one-way flight to London Heathrow Airport from Porto in the past 72 hours is £48. The best return flight deal from Porto to London Heathrow Airport found on momondo in the last 72 hours is £137.
The fastest flight from Porto to London Heathrow Airport takes 4h 40m
There are no direct flights from Porto to London Heathrow Airport. Popular non-direct route for this connection is Porto Airport - London Heathrow Airport.
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  • How far is Porto to London Heathrow by plane?

    The distance between Porto and London Heathrow is about 810.6 mi. A reasonable flight in good conditions will take 4h 40m.

  • When did momondo last update prices for flights from Porto Airport to London Heathrow Airport?

    Prices for flights from Porto Airport to London Heathrow Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Porto Airport to London Heathrow Airport?

  • How old do you have to be to fly from Porto Airport to London Heathrow Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Porto to London Heathrow Airport?

Best airlines flying from Porto to London Heathrow Airport

Compare and see reviews for airlines that fly from Porto to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom £121Free CancellationRating
7.1
1,936 reviews
Search TAP AIR PORTUGAL flights

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Why use momondo?

Why should I use momondo to find a flight deal from Porto to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Porto to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Porto to London with flexible booking policies on momondo?

Flights from Porto to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Porto to London?

Once all potential Porto to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Porto to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Porto and alert you when they change.

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