POA - LHR

£396 Find Cheap Flights from Porto Alegre to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto Alegre to Heathrow departing on 8/10. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto Alegre to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto Alegre to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Porto Alegre to Heathrow (POA-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Porto Alegre to Heathrow 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 Porto Alegre to Heathrow

Tue, 4 Nov - Wed, 26 Nov
GOL Logo
11:40 - 13:50POA-LHR
23h 10m2 stops
GOL Logo
09:00 - 08:15LHR-POA
26h 15m2 stops
£553GOL
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Mon, 10 Nov - Mon, 17 Nov
GOL Logo
11:40 - 13:50POA-LHR
23h 10m2 stops
GOL Logo
06:30 - 23:30LHR-POA
20h 00m2 stops
£591GOL
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Tue, 3 Feb - Tue, 3 Mar
TAP AIR PORTUGAL Logo
21:10 - 17:30POA-LHR
17h 20m1 stop
TAP AIR PORTUGAL Logo
06:00 - 19:40LHR-POA
16h 40m1 stop
£739TAP AIR PORTUGAL
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Tue, 4 Nov - Wed, 26 Nov
TAP AIR PORTUGAL Logo
21:10 - 21:35POA-LHR
21h 25m1 stop
TAP AIR PORTUGAL Logo
18:30 - 19:40LHR-POA
28h 10m1 stop
£742TAP AIR PORTUGAL
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Tue, 3 Feb - Tue, 3 Mar
Logo
20:10 - 14:05POA-LHR
14h 55m1 stop
Logo
07:20 - 00:25LHR-POA
20h 05m2 stops
£767
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Wed, 18 Feb - Mon, 23 Feb
LATAM Airlines Logo
20:10 - 14:05POA-LHR
14h 55m1 stop
LATAM Airlines Logo
20:15 - 09:15LHR-POA
16h 00m1 stop
£782LATAM Airlines
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Mon, 3 Nov - Thu, 13 Nov
LATAM Airlines Logo
14:55 - 14:05POA-LHR
20h 10m1 stop
LATAM Airlines Logo
20:15 - 17:05LHR-POA
23h 50m1 stop
£784LATAM Airlines
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Mon, 13 Oct - Mon, 20 Oct
Logo
13:50 - 14:15POA-LHR
20h 25m2 stops
Logo
19:50 - 19:50LHR-POA
28h 00m2 stops
£786
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Tue, 3 Feb - Tue, 3 Mar
SWISS Logo
14:55 - 21:25POA-LHR
27h 30m3 stops
SWISS Logo
20:05 - 11:35LHR-POA
42h 30m2 stops
£791SWISS
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Tue, 3 Feb - Tue, 3 Mar
SWISS Logo
14:55 - 16:40POA-LHR
22h 45m3 stops
SWISS Logo
19:30 - 11:35LHR-POA
43h 05m3 stops
£822SWISS
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Booking Insights

KAYAK's insights & trends for Porto Alegre to Heathrow flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Porto Alegre to London Heathrow Airport, 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 Porto Alegre to London Heathrow Airport is February, where tickets cost £628 (return) on average. On the other hand, the most expensive months are September and December, where the average cost of round-trip tickets is £949 and £942 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Porto Alegre to London Heathrow Airport, 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 Porto Alegre to London Heathrow Airport, you should book around 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

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

Low seasonSeptember
Cheapest flight£396
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from Porto Alegre to London Heathrow Airport

When to book flights from Porto Alegre to Heathrow

Are your dates flexible? Find out the best times to travel from Porto Alegre to Heathrow 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 Porto Alegre to London Heathrow Airport flights

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

    In the last 3 days, the lowest price for a flight from Porto Alegre to London Heathrow Airport was £535 for a one-way ticket and £747 for a return.

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

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

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

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

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

    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 Porto Alegre to London Heathrow Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Porto Alegre 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 Porto Alegre to London Heathrow Airport?

    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 London Heathrow Airport with an airline and back to Porto Alegre with another airline.

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

    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 London Heathrow Airport from Porto Alegre up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Porto Alegre to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Porto Alegre to London. 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 Porto Alegre to Heathrow? 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.
7.5
LATAM AirlinesOverall score based on 1843 reviews
7.0Entertainment
7.4Comfort
6.7Food
7.6Boarding
8.0Crew
Airline reviews

I’m entitled to a refund per LATAM due to the mid flight itinerary change and being stuck in São Paulo for 24 hours and needing to get a hotel. The airline was dismissive and of no help.

2.0 MediocreAnonymous, Aug 2025GIG - GRU
Read more LATAM Airlines reviews

I’m entitled to a refund per LATAM due to the mid flight itinerary change and being stuck in São Paulo for 24 hours and needing to get a hotel. The airline was dismissive and of no help.

Boarding was confusing with a delayed flight because there was no English translation

Bought a ticket that included a bag and they still charged me to check it in, latam is the worst airline.

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

Because the flight was late, we lost the connection to Brazil. You, Delta delayed, and you Delta anticipated the door closing in 15 min from Miami to GRU. Why? It caused a lot of stress! I almost could not see my mother in law alive because of your delay.

My entertainment did not work. I was very tired from the botched connection, and the poor sleep

Lost ,y connection due to a mechanical delay, huge line to get new connection and vouchers

It’s a delta flight operated by LATAM. The whole ticket sale is a mess, delta changed my flight but didn’t update it in LATAM system, I couldn’t get my boarding pass, it took me hours to resolve this issue with delta. I had to change my travel plan. No apology from Delta even though it’s their fault.

The boarding and new bag drop-off process was confusing and causing massive delays.

It was a very good flight, no entertainment is the reason for not checking that box.

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

Information on your arrival and departure airports

Porto Alegre (POA)
Heathrow (LHR)

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