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Cheap flights from London Heathrow Airport to Porto Alegre from £369

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — POA
17 Apr — 24 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Porto Alegre

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Porto Alegre
Explore the most affordable flight options available from Heathrow to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 March 2026.

Tue 5/521:20
LHR
-
POA
1 stop16h 00m
LATAM Airlines
Fri 5/617:50
POA
-
LHR
1 stop17h 15m
LATAM Airlines
Deal found 17/3£815
Mon 4/508:40
LHR
-
POA
2 stops19h 00m
KLM
Thu 21/515:45
POA
-
LHR
2 stops20h 30m
KLM
Deal found 16/3£883
Mon 19/1008:00
LHR
-
POA
2 stops20h 15m
Multiple Airlines
Sat 7/1116:30
POA
-
LHR
1 stop18h 35m
Multiple Airlines
Deal found 13/3£888
Thu 30/408:00
LHR
-
POA
1 stop16h 25m
TAP AIR PORTUGAL
Thu 7/521:55
POA
-
LHR
1 stop15h 50m
TAP AIR PORTUGAL
Deal found 16/3£893
Mon 4/518:45
LHR
-
POA
1 stop31h 00m
TAP AIR PORTUGAL
Thu 21/521:55
POA
-
LHR
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 16/3£904
Tue 5/508:40
LHR
-
POA
2 stops19h 05m
KLM
Fri 5/616:15
POA
-
LHR
2 stops20h 00m
KLM
Deal found 17/3£906
Mon 4/521:20
LHR
-
POA
2 stops19h 50m
LATAM Airlines
Thu 21/520:05
POA
-
LHR
1 stop15h 00m
LATAM Airlines
Deal found 15/3£918
Sat 12/921:20
LHR
-
POA
1 stop17h 55m
LATAM Airlines
Wed 23/921:40
POA
-
LHR
2 stops37h 25m
LATAM Airlines
Deal found 13/3£929

Find flight deals from Heathrow to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Porto Alegre (POA). 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 18 March 2026.

Round-trip from

£815

One-way from

£369

Popular in

July

Cheapest in

April

Average price

£869
LATAM Airlines
  • LATAM Airlines
  • 5/5-5/6
  • 2 total stops
  • 33h 15m total
  • London to Porto Alegre
Search Deals
8/4
  • 8/4
  • 3 total stops
  • 39h 15m total
  • London to Porto Alegre
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£114 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Porto Alegre 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 18 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 5/5

06:00-21:45

1 stop19h 45m

Porto Alegre Salgado Filho

Fri 5/6

15:30-22:55

2 stops27h 25m

£893

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 4/5

19:50-21:45

1 stop29h 55m

Porto Alegre Salgado Filho

Thu 21/5

21:55-22:05

1 stop20h 10m

£904

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 12/9

21:20-11:15

1 stop17h 55m

Porto Alegre Salgado Filho

Wed 23/9

06:20-15:05

1 stop28h 45m

£918
Fastest return journey

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 4/5

21:20-14:15

1 stop20h 55m

Porto Alegre Salgado Filho

Thu 21/5

14:20-15:05

1 stop20h 45m

£934

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 13/4

21:20-17:00

1 stop23h 40m

Porto Alegre Salgado Filho

Tue 12/5

04:45-15:05

1 stop30h 20m

£940

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 29/4

18:45-20:25

1 stop29h 40m

Porto Alegre Salgado Filho

Tue 5/5

00:15-22:55

1 stop18h 40m

£999

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 7/5

06:00-20:25

1 stop18h 25m

Porto Alegre Salgado Filho

Mon 11/5

11:00-22:00

2 stops31h 00m

£1,010
Cheapest one-way

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 8/4

20:50-23:35

2 stops30h 45m

£422

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 7/4

20:00-22:30

3 stops30h 30m

£431

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 22/4

18:45-11:40

2 stops20h 55m

£521

Flights are sorted by cheapest return flights first.

Deals found on 13/3

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Porto Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre from Heathrow 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 London Heathrow Airport to Porto Alegre

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Porto Alegre. Price data was last updated on 13 March 2026.

The price you pay for your flight from London Heathrow Airport to Porto Alegre may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £667). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,086). 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.

How much does it cost for a return flight from London Heathrow Airport to Porto Alegre?

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. 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 Porto Alegre. Reviews last updated 18 March 2026.
Check out reviews from past customers who have flown with Virgin Atlantic,LATAM Airlines, andTAP AIR PORTUGAL from London Heathrow Airport to Porto Alegre 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.
Virgin Atlantic
7.5
Good
682 reviews
Check prices

Entertainment

7.6

Crew

8.2

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
682 reviews
Virgin Atlantic
7.5
Good
682 reviews
Check prices

Entertainment

7.6

Crew

8.2

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
LATAM Airlines
7.4
Good
1,914 reviews
Virgin Atlantic
7.5
Good
682 reviews
Check prices

Entertainment

7.6

Crew

8.2

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
TAP AIR PORTUGAL
7.1
Good
2,170 reviews
Virgin Atlantic
7.5
Good
682 reviews
Check prices

Entertainment

7.6

Crew

8.2

Comfort

7.3

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Porto Alegre. 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 into for flights to Porto Alegre from London Heathrow?

    Porto Alegre Salgado Filho (POA) is the airport you will fly into if you book a flight from London Heathrow to Porto Alegre. You should not have trouble finding flights to Salgado Filho from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the Porto Alegre airport from London Heathrow. It is only a 4.0 mi journey from Salgado Filho (POA) to Porto Alegre’s city center.

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

    For as low as £918, TAP AIR PORTUGAL can have you in Porto Alegre from London Heathrow Airport in 17h 55m. The distance between London Heathrow Airport and Porto Alegre is about 6410 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London Heathrow Airport to Porto Alegre round-trip?

    Our cheapest airline available from London Heathrow Airport to Porto Alegre is TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £700 on this airline. Additional options worth looking into are LATAM Airlines and Virgin Atlantic, starting at £747 and £1,130 round-trip. You may be able to fly from London Heathrow Airport to Porto Alegre for 27% less than the average price by searching for these airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Porto Alegre 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 London Heathrow Airport to Porto Alegre?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £667). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,086). 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

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Alternative routes for Heathrow to Porto Alegre

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

Top 3 airlines flying from Heathrow to Porto Alegre

Discover the top 3 airlines that operate flights from Heathrow to Porto Alegre. 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 18 March 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£700Average£959FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LATAM AirlinesCheapest£747Average£1,028FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
Virgin AtlanticCheapest£1,130Average£1,589FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Porto Alegre.

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

Certainly. Search results for flights to Porto Alegre from Heathrow 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 Heathrow to Porto Alegre become cheaper?

Of course! You can now track prices for flights from Heathrow to Porto Alegre and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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