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Cheap flights from London Heathrow Airport to Porto Alegre from £457

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — POA
24 Jun — 1 Jul1
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 25 May 2026.

Fri 28/820:05
LHR
-
POA
2 stops41h 15m
SWISS
Wed 16/914:20
POA
-
LHR
3 stops22h 15m
SWISS
Deal found 23/5£1,120
Thu 11/621:20
LHR
-
POA
1 stop16h 00m
LATAM Airlines
Thu 25/620:10
POA
-
LHR
1 stop14h 55m
LATAM Airlines
Deal found 25/5£1,129
Fri 19/611:30
LHR
-
POA
3 stops25h 50m
Multiple Airlines
Sat 4/708:25
POA
-
LHR
2 stops21h 15m
Multiple Airlines
Deal found 24/5£1,134
Sat 13/621:20
LHR
-
POA
1 stop25h 45m
LATAM Airlines
Sun 28/612:10
POA
-
LHR
1 stop22h 55m
LATAM Airlines
Deal found 25/5£1,137
Fri 12/607:25
LHR
-
POA
2 stops19h 20m
Multiple Airlines
Fri 26/611:00
POA
-
LHR
2 stops25h 40m
Multiple Airlines
Deal found 24/5£1,140
Mon 20/721:20
LHR
-
POA
1 stop23h 40m
LATAM Airlines
Fri 31/720:05
POA
-
LHR
1 stop15h 00m
LATAM Airlines
Deal found 21/5£1,141
Fri 19/621:20
LHR
-
POA
1 stop23h 40m
LATAM Airlines
Sat 4/721:40
POA
-
LHR
2 stops37h 25m
LATAM Airlines
Deal found 24/5£1,161
Sat 13/621:20
LHR
-
POA
1 stop25h 45m
LATAM Airlines
Fri 26/604:45
POA
-
LHR
1 stop30h 20m
LATAM Airlines
Deal found 24/5£1,164
Sat 27/618:45
LHR
-
POA
2 stops33h 30m
Multiple Airlines
Sun 12/705:15
POA
-
LHR
3 stops29h 50m
Multiple Airlines
Deal found 24/5£1,169
Fri 12/621:20
LHR
-
POA
1 stop23h 35m
LATAM Airlines
Fri 26/608:50
POA
-
LHR
1 stop26h 15m
LATAM Airlines
Deal found 24/5£1,172
Sun 14/621:20
LHR
-
POA
1 stop25h 45m
LATAM Airlines
Sat 27/607:30
POA
-
LHR
1 stop27h 35m
LATAM Airlines
Deal found 24/5£1,174

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 25 May 2026.

Round-trip from

£1,120

One-way from

£457

Popular in

July

Cheapest in

April

Average price

£900
SWISS
  • SWISS
  • 28/8-16/9
  • 5 total stops
  • 63h 30m total
  • London to Porto Alegre
Search Deals
1/9
  • 1/9
  • 3 total stops
  • 32h 20m total
  • London to Porto Alegre
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£195 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 25 May 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

Fri 28/8

20:05-09:20

2 stops41h 15m

Porto Alegre Salgado Filho

Wed 16/9

14:20-16:35

3 stops22h 15m

£1,120
Fastest return journey

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 1/10

14:25-09:20

3 stops22h 55m

Porto Alegre Salgado Filho

Mon 26/10

14:20-13:00

2 stops19h 40m

£1,177

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sun 5/7

21:20-20:10

3 stops26h 50m

Porto Alegre Salgado Filho

Sun 19/7

09:15-15:05

2 stops25h 50m

£1,280

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 24/6

18:40-11:00

2 stops20h 20m

Porto Alegre Salgado Filho

Thu 2/7

14:20-08:15

3 stops37h 55m

£1,334

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fri 5/6

14:25-09:20

3 stops22h 55m

Porto Alegre Salgado Filho

Sun 21/6

14:25-21:30

3 stops27h 05m

£1,492

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sun 14/6

08:55-09:20

3 stops28h 25m

Porto Alegre Salgado Filho

Mon 29/6

14:20-21:30

3 stops27h 10m

£1,609

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 10/6

14:25-09:20

3 stops22h 55m

Porto Alegre Salgado Filho

Sun 28/6

14:15-08:15

3 stops38h 00m

£1,615
Cheapest one-way

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 1/9

06:00-07:50

2 stops29h 50m

£475

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 6/6

08:00-22:40

1 stop18h 40m

£640

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 22/6

18:45-21:45

1 stop31h 00m

£702

Flights are sorted by cheapest return flights first.

Deals found on 24/5

Showing 1-10 of 13 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?

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 57 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, April is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £766). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,467). 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 25 May 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
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
LATAM Airlines
7.4
Good
1,921 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
TAP AIR PORTUGAL
7.2
Good
2,261 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 £1,120, SWISS can have you in Porto Alegre from London Heathrow Airport in 41h 15m. The distance between London Heathrow Airport and Porto Alegre is about 6410 mi.

  • 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 £709 on this airline. Additional options worth looking into are LATAM Airlines and Virgin Atlantic, starting at £745 and £1,140 round-trip. You may be able to fly from London Heathrow Airport to Porto Alegre for 28% 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, April is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £766). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,467). 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

Browse thousands of different options on Cheapflights for your next trip

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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 25 May 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£709Average£849FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LATAM AirlinesCheapest£745Average£1,070FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
Virgin AtlanticCheapest£1,140Average£1,503FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Heathrow to Porto Alegre?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Porto Alegre from Heathrow today with Cheapflights!

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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