Cheap flights from Portugal to London from £45
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to London departing on 16/12. 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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Not ready to book? to track prices.British Airways flights from Portugal to London Heathrow Airport
Our best British Airways deals on Portugal to London Heathrow Airport flight tickets
Lufthansa flights from Portugal to London Heathrow Airport
Our best Lufthansa deals on Portugal to London Heathrow Airport flight tickets
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Use the filters below to find and compare flights from Portugal to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
PortoLondon
OPO Porto - LHR London Heathrow
OPOLHR
Porto
Sat 12/12
20:05-14:45
1 stop18h 40m
London Heathrow
Tue 15/12
09:55-08:10
1 stop22h 15m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Tue 24/11
14:05-20:05
1 stop6h 00m
London Heathrow
Sun 29/11
09:55-16:55
1 stop7h 00m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Tue 24/11
14:05-20:05
1 stop6h 00m
London Heathrow
Sun 29/11
09:55-16:55
1 stop7h 00m
PortoLondon
OPO Porto - LHR London Heathrow
OPOLHR
Porto
Sat 12/12
21:55-09:10
1 stop11h 15m
London Heathrow
Mon 14/12
20:50-08:10
1 stop11h 20m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Thu 14/1
18:45-21:35
Nonstop2h 50m
London Heathrow
Thu 21/1
18:30-21:20
Nonstop2h 50m
FaroLondon
FAO Faro - LHR London Heathrow
FAOLHR
Faro
Fri 13/11
17:05-22:40
1 stop5h 35m
London Heathrow
Mon 16/11
18:30-23:50
1 stop5h 20m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Wed 13/1
14:40-17:30
Nonstop2h 50m
London Heathrow
Wed 20/1
13:40-16:30
Nonstop2h 50m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Wed 25/11
10:45-13:40
Nonstop2h 55m
London Heathrow
Sun 29/11
07:00-09:50
Nonstop2h 50m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Thu 24/12
18:35-21:20
Nonstop2h 45m
London Heathrow
Wed 30/12
06:55-09:45
Nonstop2h 50m
LisbonLondon
LIS Lisbon Humberto Delgado - LHR London Heathrow
LISLHR
Lisbon Humberto Delgado
Mon 7/12
18:35-21:20
Nonstop2h 45m
London Heathrow
Wed 16/12
06:55-09:45
Nonstop2h 50m
See travel insights to London from
How to get the cheapest flight ticket from Portugal 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 cheapest month to fly to London Heathrow Airport?
In general, February is the cheapest month to fly from Portugal to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £146. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Portugal averaging around £148.
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 Portugal is on a Saturday. momondo users have found tickets for Saturday departures for as low as £225. 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 £364.
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 at midday. momondo users have found flights departing from Portugal to London Heathrow Airport at midday for as low as £193. 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 morning when prices are £358 on average. Flights to London Heathrow Airport from Portugal in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Portugal to London Heathrow flight route?
Fly from Faro to London Heathrow for the best Portugal - London Heathrow flight prices
How far in advance should I book a flight from Portugal to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £193 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 Portugal for as low as £139 on momondo.
What cabin class options are available on Portugal to London Heathrow Airport flights?
There are 4 cabin classes available to choose from on Portugal to London Heathrow Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How often are flights from Portugal to London delayed?
Historically, on average around 21% of flights between Portugal and London have experienced a delay on any given week. The average delay length over the past 12 months has been 109 minutes.
What is the most punctual flight time for Portugal to London flights?
Generally, flights departing at night tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.
What day of the week experiences the fewest flight delays on this route?
Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.
Which airline has the best punctuality record on Portugal to London flights?
According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 18% of their flights experiencing any sort of delay.
How many flights depart from Portugal to London Heathrow Airport on average per day?
The number of flights available between Portugal and London Heathrow Airport is 45 per day as of October 2026. The most frequent departure time is 16:00, with 43% of daily flights leaving in the afternoon.
How many flights depart from Portugal to London Heathrow Airport on average per week?
318 flights are operational weekly from Portugal to London Heathrow Airport as of October 2026. The most popular departure day for this route is Mon, with 25% of flights per week taking off on this day.
Cheap Portugal to London Heathrow Airport flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portugal to London Heathrow Airport
Frequently asked questions about flying from Portugal to London Heathrow Airport
When did momondo last update prices for flights from Portugal to London Heathrow Airport?
Prices for flights from Portugal to London Heathrow Airport were last updated today.
How many operators does momondo search for flights from Portugal to London Heathrow Airport?
As of October 2026, there are 2 operators available to choose from for flights from Portugal to London Heathrow Airport.
How old do you have to be to fly from Portugal to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portugal to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portugal to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portugal to London Heathrow Airport is Airbus A320-100/200 (19.19% of total bookings). The next most popular plane models are Airbus A320neo (18.27%), Airbus A321neo (16.70%), and Airbus A319 (10.52%).
Best airlines flying from Portugal to London Heathrow Airport
Compare and see reviews for airlines that fly from Portugal to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £127 | Free Cancellation | Rating 7.2 2,383 reviews | |||
| PriceFrom £133 | Free Cancellation | Rating 6.7 8,249 reviews |
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Why should I use momondo to find a flight deal from Portugal to London?
It is quick and easy to find Portugal to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.
Can I find flights from Portugal to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from Portugal with this policy.
How can momondo help me find flights from Portugal to London?
momondo provides multiple filters to help you find the best flight to London from Portugal. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Portugal to London right now. Can momondo alert me if prices change?
Price alerts on flights to London from Portugal are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.