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Cheap flights from Porto Alegre to London Heathrow Airport from £436

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
POA — LHR
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Porto Alegre to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Porto Alegre to Heathrow
Explore the most affordable flight options available from Porto Alegre to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.

Thu 12/300:45
POA
-
LHR
1 stop18h 55m
TAP AIR PORTUGAL
Thu 16/408:00
LHR
-
POA
1 stop16h 25m
TAP AIR PORTUGAL
Deal found 31/1£651
Fri 6/206:00
POA
-
LHR
2 stops23h 00m
Multiple Airlines
Tue 3/320:25
LHR
-
POA
2 stops30h 15m
Multiple Airlines
Deal found 31/1£711
Tue 12/517:50
POA
-
LHR
1 stop17h 15m
LATAM Airlines
Tue 19/521:20
LHR
-
POA
1 stop15h 55m
LATAM Airlines
Deal found 2/2£727
Tue 12/517:50
POA
-
LHR
1 stop17h 15m
LATAM Airlines
Tue 26/521:20
LHR
-
POA
1 stop15h 55m
LATAM Airlines
Deal found 31/1£733
Sun 1/211:40
POA
-
LHR
2 stops26h 20m
Multiple Airlines
Thu 26/206:20
LHR
-
POA
2 stops30h 35m
Multiple Airlines
Deal found 31/1£738
Tue 12/514:00
POA
-
LHR
2 stops21h 05m
LATAM Airlines
Thu 28/521:20
LHR
-
POA
2 stops21h 25m
LATAM Airlines
Deal found 31/1£745
Tue 10/321:10
POA
-
LHR
1 stop17h 20m
TAP AIR PORTUGAL
Tue 31/308:00
LHR
-
POA
1 stop17h 45m
TAP AIR PORTUGAL
Deal found 31/1£749
Thu 7/518:25
POA
-
LHR
3 stops41h 50m
GOL
Mon 18/506:15
LHR
-
POA
2 stops21h 25m
GOL
Deal found 1/2£751

Find flight deals from Porto Alegre to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Porto Alegre (POA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 February 2026.

Round-trip from

£651

One-way from

£436

Popular in

January

Cheapest in

February

Average price

£662
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 12/3-16/4
  • 2 total stops
  • 35h 20m total
  • Porto Alegre to London
Search Deals
7/4
  • 7/4
  • 2 total stops
  • 45h 35m total
  • Porto Alegre to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Porto Alegre to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Porto Alegre to London Heathrow Airport that are best for you.

Fly from

Porto Alegre

Fly to

Heathrow

Route

Depart

Return

Price

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 12/3

00:45-18:55

1 stop15h 10m

London Heathrow

Thu 16/4

08:00-20:25

1 stop16h 25m

£659

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Sun 17/5

12:10-15:05

1 stop22h 55m

London Heathrow

Fri 29/5

21:20-09:15

1 stop15h 55m

£769

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 18/3

20:10-14:05

1 stop14h 55m

London Heathrow

Wed 25/3

06:55-00:40

2 stops20h 45m

£772

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 11/5

06:00-10:30

2 stops24h 30m

London Heathrow

Wed 27/5

08:55-09:30

2 stops28h 35m

£783

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 13/3

06:00-18:20

2 stops33h 20m

London Heathrow

Sun 19/4

19:45-00:20

2 stops32h 35m

£792

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 11/5

11:20-13:45

2 stops22h 25m

London Heathrow

Tue 26/5

19:45-23:55

2 stops32h 10m

£795

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 14/5

10:05-15:05

1 stop25h 00m

London Heathrow

Sat 23/5

21:20-00:25

2 stops31h 05m

£795

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 11/5

13:40-15:05

2 stops21h 25m

London Heathrow

Tue 26/5

21:20-14:45

2 stops21h 25m

£805

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Sun 17/5

15:00-15:05

2 stops20h 05m

London Heathrow

Thu 28/5

21:20-16:55

2 stops23h 35m

£809

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 1/4

10:00-09:40

2 stops19h 40m

London Heathrow

Wed 8/4

16:30-08:50

2 stops20h 20m

£816

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 20 results
1
2

Best time to book a flight from Porto Alegre to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Porto Alegre with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Porto Alegre to London Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from Porto Alegre to Heathrow. Price data was last updated on 30 January 2026.

The best time to book flights from Porto Alegre to London Heathrow Airport is 36 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Porto Alegre to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London Heathrow Airport (average of £121). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £830). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 2 February 2026.
Check out reviews from past customers who have flown with LATAM Airlines from Porto Alegre to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,917 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Overall

7.5

Boarding

7.5

Crew

8.0

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Jess,Jan 2026

GRU - MIA

sat on the tarmac for 4.5 hours with no explanation, climate control, honesty about the timeline or the situation, or even letting anyone off. The crew was passive-aggressive and sneaky, trying to skirt legal time limits requiring financial restitution for passengers, pretending the "flight had started" even though they didn't budge for another 40 minutes. One of the worst flights I've ever taken
LATAM Airlines
7.5
Good
1,917 reviews
LATAM Airlines
7.5
Good
1,917 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Overall

7.5

Boarding

7.5

Crew

8.0

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Jess,Jan 2026

GRU - MIA

sat on the tarmac for 4.5 hours with no explanation, climate control, honesty about the timeline or the situation, or even letting anyone off. The crew was passive-aggressive and sneaky, trying to skirt legal time limits requiring financial restitution for passengers, pretending the "flight had started" even though they didn't budge for another 40 minutes. One of the worst flights I've ever taken

Related info for your journey

Find useful and relevant information for your journey from Porto Alegre to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Porto Alegre to London Heathrow?

    Located just 4.0 mi from the city center, Porto Alegre Salgado Filho is the airport most travelers will use when flying to London Heathrow from Porto Alegre. Booking flights from Salgado Filho (POA) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 1 airline.

  • How long is the flight from Porto Alegre to London Heathrow Airport?

    TAP AIR PORTUGAL, LATAM Airlines, and GOL can get you from Porto Alegre to London Heathrow Airport in just under 15h 10m. Your travel time can differ by up to 9h 20m. Airlines will cover a distance of 6410 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Porto Alegre to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Porto Alegre to London Heathrow Airport round-trip from £747. LATAM Airlines is 11% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Porto Alegre to Heathrow that include hotel bookings?

    Yes. In addition to deals on Porto Alegre to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Porto Alegre to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto Alegre to Heathrow.

  • Can I find deals for business class flights from Porto Alegre to Heathrow?

    Yes. Cheapflights offers flight deals from Porto Alegre to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London Heathrow Airport (average of £121). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £830). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Porto Alegre to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Porto Alegre to Gatwick flights

Top airline flying from Porto Alegre to Heathrow

Discover the top airline that operate flights from Porto Alegre to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest£747Average£793FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Porto Alegre to Heathrow?

Cheapflights makes it easy to find Porto Alegre to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Porto Alegre to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Porto Alegre.

Can Cheapflights find flights from Porto Alegre to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from Porto Alegre shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Porto Alegre to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Porto Alegre to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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