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Cheap flights from Porto to London from £51

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 13/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Porto to London

Cheap return flights

Vueling Logo
19:55 - 14:45OPO-LHR
18h 50m1 stop
Vueling Logo
20:50 - 08:10LHR-OPO
11h 20m1 stop
£110Vueling
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tors, 13 nov - lör, 15 nov
Logo
19:55 - 14:45OPO-LHR
18h 50m1 stop
Logo
15:30 - 06:50LHR-OPO
15h 20m2 stops
£113
Find Deal
tors, 13 nov - lör, 15 nov
Vueling Logo
21:55 - 09:10OPO-LHR
11h 15m1 stop
Vueling Logo
18:50 - 08:10LHR-OPO
13h 20m1 stop
£124Vueling
Find Deal
lör, 29 nov - tis, 2 dec
Vueling Logo
22:00 - 09:10OPO-LHR
11h 10m1 stop
Vueling Logo
18:50 - 08:10LHR-OPO
13h 20m1 stop
£134Vueling
Find Deal
tors, 23 okt - ons, 29 okt
Logo
11:35 - 17:15OPO-LHR
5h 40m1 stop
Logo
11:25 - 19:20LHR-OPO
7h 55m1 stop
£137
Find Deal
tis, 24 feb - tis, 10 mar
Logo
20:40 - 08:25OPO-LHR
11h 45m1 stop
Logo
15:15 - 07:55LHR-OPO
16h 40m1 stop
£138
Find Deal
fre, 13 mar - sön, 15 mar
TAP AIR PORTUGAL Logo
12:00 - 17:30OPO-LHR
5h 30m1 stop
TAP AIR PORTUGAL Logo
12:25 - 18:00LHR-OPO
5h 35m1 stop
£140TAP AIR PORTUGAL
Find Deal
lör, 15 nov - tors, 20 nov
TAP AIR PORTUGAL Logo
09:00 - 15:30OPO-LHR
6h 30m1 stop
TAP AIR PORTUGAL Logo
08:15 - 22:00LHR-OPO
13h 45m1 stop
£141TAP AIR PORTUGAL
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tors, 11 dec - sön, 14 dec
Iberia Logo
08:20 - 14:55OPO-LHR
6h 35m1 stop
Iberia Logo
09:15 - 16:00LHR-OPO
6h 45m1 stop
£151Iberia
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fre, 20 feb - tis, 10 mar
Lufthansa Logo
12:30 - 20:50OPO-LHR
8h 20m1 stop
Lufthansa Logo
20:15 - 12:50LHR-OPO
16h 35m1 stop
£173Lufthansa
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lör, 14 mar - sön, 15 mar

TAP AIR PORTUGAL flights from Porto to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on Porto to London Heathrow Airport flight tickets
TAP AIR PORTUGAL
15 Nov
OPO12:00Porto
5h 30m
1 stop
LHR17:30London Heathrow
20 Nov
LHR12:25London Heathrow
5h 35m
1 stop
OPO18:00Porto
£140
Find similar
TAP AIR PORTUGAL
11 Dec
OPO09:00Porto
6h 30m
1 stop
LHR15:30London Heathrow
14 Dec
LHR08:15London Heathrow
13h 45m
1 stop
OPO22:00Porto
£141
Find similar
TAP AIR PORTUGAL
22 Nov
OPO12:00Porto
5h 30m
1 stop
LHR17:30London Heathrow
29 Nov
LHR06:00London Heathrow
6h 10m
1 stop
OPO12:10Porto
£142
Find similar

SWISS flights from Porto to London Heathrow Airport

Our best SWISS deals on Porto to London Heathrow Airport flight tickets
SWISS
18 Sept
OPO19:20Porto
12h 35m
1 stop
LHR07:55London Heathrow
21 Sept
LHR06:00London Heathrow
5h 30m
1 stop
OPO11:30Porto
£330
Find similar
SWISS
20 Sept
OPO08:40Porto
9h 50m
2 stops
LHR18:30London Heathrow
21 Sept
LHR06:00London Heathrow
5h 30m
1 stop
OPO11:30Porto
£331
Find similar
SWISS
19 Sept
OPO19:20Porto
23h 10m
2 stops
LHR18:30London Heathrow
21 Sept
LHR06:00London Heathrow
5h 30m
1 stop
OPO11:30Porto
£336
Find similar

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 16 september 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

tors 13/11

19:55-14:45

1 stop18h 50m

London Heathrow

lör 15/11

20:50-08:10

1 stop11h 20m

£110

PortoLondon

OPO - LHR

OPOLHR

Porto

tors 13/11

19:55-14:45

1 stop18h 50m

London Heathrow

lör 15/11

15:30-06:50

2 stops15h 20m

£113

PortoLondon

OPO - LHR

OPOLHR

Porto

lör 29/11

21:55-09:10

1 stop11h 15m

London Heathrow

tis 2/12

18:50-08:10

1 stop13h 20m

£124

PortoLondon

OPO - LHR

OPOLHR

Porto

tors 23/10

22:00-09:10

1 stop11h 10m

London Heathrow

ons 29/10

18:50-08:10

1 stop13h 20m

£134

PortoLondon

OPO - LHR

OPOLHR

Porto

tis 24/2

11:35-17:15

1 stop5h 40m

London Heathrow

tis 10/3

11:25-19:20

1 stop7h 55m

£137

PortoLondon

OPO - LHR

OPOLHR

Porto

fre 13/3

20:40-08:25

1 stop11h 45m

London Heathrow

sön 15/3

15:15-07:55

1 stop16h 40m

£138

PortoLondon

OPO - LHR

OPOLHR

Porto

lör 15/11

12:00-17:30

1 stop5h 30m

London Heathrow

tors 20/11

12:25-18:00

1 stop5h 35m

£140

PortoLondon

OPO - LHR

OPOLHR

Porto

tors 11/12

09:00-15:30

1 stop6h 30m

London Heathrow

sön 14/12

08:15-22:00

1 stop13h 45m

£141

PortoLondon

OPO - LHR

OPOLHR

Porto

fre 20/2

08:20-14:55

1 stop6h 35m

London Heathrow

tis 10/3

09:15-16:00

1 stop6h 45m

£151

PortoLondon

OPO - LHR

OPOLHR

Porto

lör 14/3

12:30-20:50

1 stop8h 20m

London Heathrow

sön 15/3

20:15-12:50

1 stop16h 35m

£173

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

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, February 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 £129. The month of June is another great option to travel to London Heathrow Airport, with average flight prices from Porto averaging around £142.

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 £176. 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 £221.

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 £118. 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 £189 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 have Porto to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Porto to London Heathrow Airport flights are approximately 37% 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

Direct flights

None
There are no direct flights from Porto to London Heathrow Airport. There are no popular flight routes from Porto to 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 5h 25m.

  • 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 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Poole
Colchester
Worthing
Salisbury
Chelmsford

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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