LHR - OPO

£57 Find Cheap Flights from London Heathrow Airport to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Porto departing on 26/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Porto.
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Everything you should know

Cheapest return fare
£120
Typical prices: £138-£178
Multiple Airlines
Sat 10/1Sat 17/1
LHR - OPO • 1 stop
Cheapest one-way flight
£57
Typical prices: £64-£156
Multiple Airlines
Thu 26/2
LHR - OPO • 1 stop
When to book
5 weeks
in advance
Our data shows that travellers who book at least 5 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 30% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Porto (LHR-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Porto

Sat, 10 Jan - Sat, 17 Jan
Multiple Airlines Logo
20:50 - 08:10
LHR
-
OPO
11h 20m1 stop
Multiple Airlines Logo
20:40 - 09:15
OPO
-
LHR
12h 35m1 stop
£120Multiple Airlines
Thu, 5 Mar - Tue, 24 Mar
Multiple Airlines Logo
15:30 - 20:15
LHR
-
OPO
4h 45m1 stop
Multiple Airlines Logo
08:45 - 14:25
OPO
-
LHR
5h 40m1 stop
£120Multiple Airlines
Wed, 11 Mar - Sat, 21 Mar
Multiple Airlines Logo
09:55 - 21:15
LHR
-
OPO
11h 20m1 stop
Multiple Airlines Logo
08:45 - 14:25
OPO
-
LHR
5h 40m1 stop
£125Multiple Airlines
Mon, 9 Mar - Sat, 21 Mar
Multiple Airlines Logo
20:50 - 08:10
LHR
-
OPO
11h 20m1 stop
Multiple Airlines Logo
08:45 - 14:25
OPO
-
LHR
5h 40m1 stop
£126Multiple Airlines
Sat, 7 Feb - Tue, 24 Feb
Vueling Logo
15:15 - 08:25
LHR
-
OPO
17h 10m1 stop
Vueling Logo
20:05 - 14:45
OPO
-
LHR
18h 40m1 stop
£127Vueling
Tue, 20 Jan - Tue, 10 Feb
Multiple Airlines Logo
20:50 - 08:10
LHR
-
OPO
11h 20m1 stop
Multiple Airlines Logo
20:10 - 08:25
OPO
-
LHR
12h 15m1 stop
£131Multiple Airlines
Thu, 5 Mar - Tue, 24 Mar
TAP AIR PORTUGAL Logo
13:40 - 22:00
LHR
-
OPO
8h 20m1 stop
TAP AIR PORTUGAL Logo
06:55 - 12:40
OPO
-
LHR
5h 45m1 stop
£132TAP AIR PORTUGAL
Sat, 10 Jan - Fri, 6 Feb
Multiple Airlines Logo
20:50 - 08:10
LHR
-
OPO
11h 20m1 stop
Multiple Airlines Logo
20:40 - 09:15
OPO
-
LHR
12h 35m1 stop
£133Multiple Airlines
Wed, 28 Jan - Wed, 4 Feb
TAP AIR PORTUGAL Logo
08:15 - 18:55
LHR
-
OPO
10h 40m1 stop
TAP AIR PORTUGAL Logo
12:00 - 17:30
OPO
-
LHR
5h 30m1 stop
£134TAP AIR PORTUGAL
Sun, 11 Jan - Sun, 18 Jan
TAP AIR PORTUGAL Logo
13:40 - 18:55
LHR
-
OPO
5h 15m1 stop
TAP AIR PORTUGAL Logo
06:55 - 12:40
OPO
-
LHR
5h 45m1 stop
£135TAP AIR PORTUGAL
Booking Insights

KAYAK's insights & trends for Heathrow to Porto flights

Get data-powered insights and trends into flights from Heathrow to Porto to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from London Heathrow Airport to Porto?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Porto departing in January.

What’s the cheapest day of the week to fly from London Heathrow Airport to Porto?

The average price of all round-trip flights from London Heathrow Airport to Porto clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from London Heathrow Airport to Porto, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Porto, Thursday is the cheapest day to fly and Monday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Porto is January, where tickets cost £149 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is £302 and £271 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Heathrow Airport to Porto, you should book around 5 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Porto

Low seasonNovember
Cheapest flight£57
Best time to beat the crowds (24% less expensive on average)
Most popular time to fly (26% more expensive on average)
Flight from London Heathrow Airport to Porto

When to book flights from Heathrow to Porto

Are your dates flexible? Find out the best times to travel from Heathrow to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Porto flights

  • What is the cheapest flight from London Heathrow Airport to Porto?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Porto was £57 for a one-way ticket and £120 for a return.

  • Which airports will I be using when flying from London Heathrow Airport to Porto?

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at Porto, also known as Porto.

  • Which aircraft models fly most regularly from London Heathrow Airport to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Heathrow Airport to Porto?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between London Heathrow Airport and Porto, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from London to Porto, KLM or SWISS?

    The two airlines most popular with KAYAK users for flights from London to Porto are KLM and SWISS. With an average price for the route of £200 and an overall rating of 7.7, KLM is the most popular choice. SWISS is also a great choice for the route, with an average price of £286 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from London Heathrow Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Porto with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Heathrow to Porto

 
See real verified KAYAK customer reviews for airlines flying from London to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.7
KLMOverall score based on 1434 reviews
8.3Crew
7.2Food
7.1Entertainment
7.8Boarding
7.6Comfort
Airline reviews

Terrible last row seats many seats available but no offer to move to better seat

2.0 MediocreAnonymous, Dec 2025
AMS - BUD
Read more KLM reviews

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

Flight from London was delayed so missed the connecting flight. Taking 2 days to get to destination which should have only taken a few hours.

Too cramped up for the better seats I paid for.

I didn’t like my seat in my return flight from Montreal to Orlando at all; considering I paid extra for better seats. That middle seat was cramped up way too much.

Suitcase didn’t arrive to Stockholm. Chairs y comfy and not even water is offered

Bad baggage and people management at boarding forcing me to dispatch my bad despite being the perfect size and respecting everything perfectly, whereas many did not and many free empty spots on the plane as usual… making me loose time and my planned bus at arrival to go to Geneva. Costing me 100 euros extra! So Brussels airlines needs to refund me

I never board the flight. My visa was delayed and when I tried calling Kayak, no one answer and I still have not heard from anyone.

All great. Very efficient. Good emails that kept us in the know

Original flight was canceled, booked another one and find out when checking I was on the waiting list. Horrible experience

Actually this is my first time using airline I was in every single thing that happened throughout our journey, the appearance of the plane inside furnished about the seating the flight attendants and many many more I was so excited throughout thank you Brussels Airlines for the great service.

On board service was decent. I like the legroom at UA that seems to be more than in other airlines

I like the price. I dislike the website where I wanted to ask questions about the unusual high prices of the luggage fees. I called the toll free number from the United States and I cannot get through. You should test your own toll free website for info and you will know what I am writing about.

Wonderful just hope the had more direct flights to Boston

Boarding process was fast and efficient. Short flight but on time and well organized. I would certainly fly TAP again.

Very borderline, low budget airline without low budget prices There are no counts of soda, everything is dispensed enlarged bottles and poured into tiny cups about 70 mL so in order to keep hydrated you have to take 3-4 cups at a time. Also, there was only one food item offered, pasta, they ran out of chicken right away. Snack was very poor. It was called tuna sandwich, which is truly borderline. The flight attend attendance seemed to be overworked and tired.

TAP‘s flight attendants seem to be among the least ambitious of all the international flight crews we’ve flown with. . When we left US and went to Portugal, and when we returned from Portugal, flight attendants were not very visible. Then did not offer frequent water breaks and when we had to go back to request water, I was almost an imposition. Meal quality was just average. The dinners were fine. Breakfast wraps were presented soggy.

Did not enjoy the meal provided. The aircraft was dirty. For instance, the screen seemed to have been cleaned with a dirty rag. Disgusting.

The business class seats were smaller and closer together than other airlines.

Boarding- Good Seat Comfort - OK Crew - Good Food - Mediocre On Time - Very Good

Didn't like much. Wheelchair assistance was almost nonexistent. No one at TAP check in process helpful. On the plane, stewards were not friendly and disorganized. Food was terrible for 8 hr flight. We were skipped at snack time and even though we tried to get attention using overhead call system no one even looked up at us to acknowledge. Being at the back of first section and by the lavatory we only were able to request when they came to pick up everyone else's garbage and they were nonchalant...no apology or even choice. The 1/2 half bread with slice of cheese was a waste. Deplaning was horrible but I'll blame lisbon airport for that. Plane left late at made good time still arrived about 15 behind schedule and for using remote deplaning and bus to terminal took another 20 min to gate. Those with connections were highly stressed. Took us 2 hrs from landing to get to ground transportation and exit airport. And that was with wheelchair assistance.

Bad boarding, threat to force bag check mid journey, lines, late, buses, more waiting awful end to end.

The crew was amazing. I appreciate the level of professionalism in the Iberia crew.

Flight cancelled, lost a day of travel where we were trying to meet friends we couldn't meet. Iberia website is very difficult to navigate and has lots of dead links. If you do not speak Spanish it is even harder. Tried communicating on their WhatsApp and that was also close to impossible. We were told we'd be compensated 150EU's for this cancelled flight but there is no avenue towards rectifying this issue. I've had to take it up with my credit card to contest the charges and not pay for a flight that didn't happen but doubt I will ever be reimbursed for my two Ubers to the airport where we never even departed or the 150EU's we were told we would receive. I would never fly Iberia again. Clown show.

We were delayed 2 hours because the crew was late. They need better planning by the crew, we had to sit in uncomfortable seats waiting for them.

Difficulty to check in online, but well handled at the airport. Flight delay was unfortunate. Crew was adequate but not what we have usually experienced from BA. Seat was not comfortable.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

Terrible. Won’t fly again. Boarding was an issue. Took TWO hours to “find” my confirmed reservation. Crew at desk was super rude and unconcerned. Was not escorted through despite delay on their end. Almost missed fight and luggage arrived one day late…. Which I had to pick up by cab or wait even longer (not reimbursed).

The plane needs upgrading, the seats are uncomfortable, we are a family of three and they split us and did nothing to group us together, and the food is horrible compared to other airlines bu

Horrible almost missed my flight because my 1st flight was delayed. Airline crew is so unprofessional. The people on the plane do whatever they want kids running screaming. Will never fly this airline again Suitcases never arrived

Flight was delayed 3 hours and 15 minutes. The delay caused me to miss my tour group due to arriving late.

It was a wonderful experience with great food, great staff, and no difficulties boarding!

Nice lounge but had a 5 hour layover which is a lot

Flight on time and priority boarding worked. I travelled economy although business was available as no flights are cheap these days and at least with BA loyalty card I get a baggage allowance for nothing. That made the flight comparable or even cheaper than the ‘budget’ alternative. As for catering and entertainment - not on a BA short haul economy ! At least we were offered biscuits and water! Catering for economy short haul has been reduced to the minimum - no tea or coffee or other drinks than water (from a large bottle with a paper cup on offer). They will say this is better for the environment, which it is, but proper waste management is still needed for empty packets etc. so actually it’s a money saver.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

We were in business class and I had seat # 1. This was a night flight and after dinner was served, lights were dimmed and I went to sleep. The crew were loud and noisy so I didn’t get much sleep. I expect the crew to enjoy themselves but would Appreciate some decency in staying quiet while the passengers sleep

Have travelled business class with other airlines who profess to be the best in the world. They can however not beat the service and comfort that BA provide.

Great on board entertainment Tasty food Cattle class obviously crammed but not as bad as shorter hall flights

Everything you need to know for your flight from Heathrow to Porto

Information on your arrival and departure airports