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Cheap flights from London Heathrow Airport to Porto Alegre from £643

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Porto Alegre departing on 17/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to Porto Alegre

Cheap return flights

Logo
06:30 - 00:55LHR-POA
22h 25m2 stops
Logo
17:45 - 16:35POA-LHR
18h 50m2 stops
£643
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Wed, 17 Sep - Fri, 17 Oct
Logo
06:30 - 00:55LHR-POA
22h 25m2 stops
Logo
13:55 - 16:35POA-LHR
22h 40m2 stops
£690
Find Deal
Wed, 17 Sep - Thu, 16 Oct
KLM Logo
08:40 - 00:55LHR-POA
20h 15m2 stops
KLM Logo
17:40 - 16:15POA-LHR
18h 35m2 stops
£700KLM
Find Deal
Mon, 15 Sep - Tue, 14 Oct
KLM Logo
06:30 - 00:55LHR-POA
22h 25m2 stops
KLM Logo
17:45 - 17:50POA-LHR
20h 05m2 stops
£707KLM
Find Deal
Thu, 18 Sep - Fri, 17 Oct
LATAM Airlines Logo
21:20 - 11:30LHR-POA
18h 10m1 stop
LATAM Airlines Logo
20:00 - 15:05POA-LHR
15h 05m1 stop
£790LATAM Airlines
Find Deal
Mon, 15 Sep - Tue, 14 Oct
LATAM Airlines Logo
21:20 - 13:50LHR-POA
20h 30m1 stop
LATAM Airlines Logo
15:15 - 15:05POA-LHR
19h 50m1 stop
£792LATAM Airlines
Find Deal
Mon, 15 Sep - Tue, 14 Oct
TAP AIR PORTUGAL Logo
19:50 - 20:25LHR-POA
28h 35m1 stop
TAP AIR PORTUGAL Logo
21:55 - 17:45POA-LHR
15h 50m1 stop
£840TAP AIR PORTUGAL
Find Deal
Wed, 17 Sep - Thu, 16 Oct
TAP AIR PORTUGAL Logo
08:00 - 20:25LHR-POA
16h 25m1 stop
TAP AIR PORTUGAL Logo
21:55 - 12:45POA-LHR
34h 50m1 stop
£841TAP AIR PORTUGAL
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Thu, 18 Sep - Thu, 16 Oct
United Airlines Logo
11:05 - 14:35LHR-POA
31h 30m2 stops
United Airlines Logo
13:55 - 08:20POA-LHR
38h 25m2 stops
£897United Airlines
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Mon, 15 Sep - Wed, 15 Oct
United Airlines Logo
11:05 - 14:35LHR-POA
31h 30m2 stops
United Airlines Logo
15:25 - 08:20POA-LHR
36h 55m2 stops
£950United Airlines
Find Deal
Wed, 17 Sep - Wed, 15 Oct

TAP AIR PORTUGAL flights from London Heathrow Airport to Porto Alegre

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Porto Alegre flight tickets
TAP AIR PORTUGAL
17 Sept
LHR19:50London Heathrow
28h 35m
1 stop
POA20:25Porto Alegre Salgado Filho
16 Oct
POA21:55Porto Alegre Salgado Filho
15h 50m
1 stop
LHR17:45London Heathrow
£840
Find similar
TAP AIR PORTUGAL
18 Sept
LHR08:00London Heathrow
16h 25m
1 stop
POA20:25Porto Alegre Salgado Filho
16 Oct
POA21:55Porto Alegre Salgado Filho
34h 50m
1 stop
LHR12:45London Heathrow
£841
Find similar
TAP AIR PORTUGAL
15 Sept
LHR18:45London Heathrow
31h 00m
1 stop
POA21:45Porto Alegre Salgado Filho
18 Oct
POA01:40Porto Alegre Salgado Filho
28h 40m
1 stop
LHR10:20London Heathrow
£898
Find similar

LATAM Airlines flights from London Heathrow Airport to Porto Alegre

Our best LATAM Airlines deals on London Heathrow Airport to Porto Alegre flight tickets
LATAM Airlines
15 Sept
LHR21:20London Heathrow
18h 10m
1 stop
POA11:30Porto Alegre Salgado Filho
14 Oct
POA20:00Porto Alegre Salgado Filho
15h 05m
1 stop
LHR15:05London Heathrow
£790
Find similar
LATAM Airlines
15 Sept
LHR21:20London Heathrow
20h 30m
1 stop
POA13:50Porto Alegre Salgado Filho
14 Oct
POA15:15Porto Alegre Salgado Filho
19h 50m
1 stop
LHR15:05London Heathrow
£792
Find similar
LATAM Airlines
15 Sept
LHR21:20London Heathrow
18h 10m
1 stop
POA11:30Porto Alegre Salgado Filho
14 Oct
POA18:15Porto Alegre Salgado Filho
40h 50m
2 stops
LHR15:05London Heathrow
£799
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 1 August 2025.
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

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 17/9

06:30-00:55

2 stops22h 25m

Porto Alegre Salgado Filho

Fri 17/10

17:45-16:35

2 stops18h 50m

£643

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 17/9

06:30-00:55

2 stops22h 25m

Porto Alegre Salgado Filho

Thu 16/10

13:55-16:35

2 stops22h 40m

£690

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 15/9

08:40-00:55

2 stops20h 15m

Porto Alegre Salgado Filho

Tue 14/10

17:40-16:15

2 stops18h 35m

£700

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 18/9

06:30-00:55

2 stops22h 25m

Porto Alegre Salgado Filho

Fri 17/10

17:45-17:50

2 stops20h 05m

£707

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 15/9

21:20-11:30

1 stop18h 10m

Porto Alegre Salgado Filho

Tue 14/10

20:00-15:05

1 stop15h 05m

£790

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 15/9

21:20-13:50

1 stop20h 30m

Porto Alegre Salgado Filho

Tue 14/10

15:15-15:05

1 stop19h 50m

£792

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 17/9

19:50-20:25

1 stop28h 35m

Porto Alegre Salgado Filho

Thu 16/10

21:55-17:45

1 stop15h 50m

£840

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 18/9

08:00-20:25

1 stop16h 25m

Porto Alegre Salgado Filho

Thu 16/10

21:55-12:45

1 stop34h 50m

£841

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 15/9

11:05-14:35

2 stops31h 30m

Porto Alegre Salgado Filho

Wed 15/10

13:55-08:20

2 stops38h 25m

£897

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 17/9

11:05-14:35

2 stops31h 30m

Porto Alegre Salgado Filho

Wed 15/10

15:25-08:20

2 stops36h 55m

£950

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
1
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See travel insights to Porto Alegre from

How to get the cheapest flight ticket from London Heathrow Airport to Porto Alegre

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London Heathrow Airport and Porto Alegre?

What is the cheapest month to fly to Porto Alegre?

In general, February is the cheapest month to fly from London Heathrow Airport to Porto Alegre. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £822. If you aren’t able to travel during the month of February, then book flights to Porto Alegre from London Heathrow Airport during March instead. Flights to Porto Alegre in March, while not as cheap as those in February, still average around £823.

What is the cheapest day to depart on your flight to Porto Alegre?

On average, the least expensive day to fly to Porto Alegre from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as £837. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,012.

What is the cheapest time of day to depart on your flight to Porto Alegre?

Our most recent data shows that the best time of day to fly to Porto Alegre is in the morning. Flights from London Heathrow Airport to Porto Alegre during this time can be as low as £881. Flights to Porto Alegre are more costly in the evening, with an average ticket price of £947. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Porto Alegre?

You are more likely to see cheaper flights to Porto Alegre from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto Alegre for around £1,017 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto Alegre from London Heathrow Airport for as low as £756 on momondo.

Can stopping save me money on London Heathrow Airport to Porto Alegre flights?

You could potentially save up to 7% on your flight if you consider stops on a London Heathrow Airport to Porto Alegre flight.

When to book flights from London Heathrow Airport to Porto Alegre

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Porto Alegre according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Porto Alegre (LHR to POA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Porto Alegre

Best price found

£645

Fastest flight time

14h 25m

Direct flights

None

Airports in Porto Alegre

1 airport
The best one-way flight to Porto Alegre from London Heathrow Airport in the past 72 hours is £645. The best return flight deal from London Heathrow Airport to Porto Alegre found on momondo in the last 72 hours is £643.
The fastest flight from London Heathrow Airport to Porto Alegre takes 14h 25m
There are no direct flights from London Heathrow Airport to Porto Alegre. Popular non-direct route for this connection is London Heathrow Airport - Porto Alegre Salgado Filho Airport.
There is 1 airport near Porto Alegre: Porto Alegre Salgado Filho (POA)
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  • How far is London Heathrow to Porto Alegre Salgado Filho by plane?

    The distance between London Heathrow and Porto Alegre Salgado Filho is about 6413.7 mi. 14h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from London Heathrow Airport to Porto Alegre Salgado Filho Airport?

    Prices for flights from London Heathrow Airport to Porto Alegre Salgado Filho Airport are updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Porto Alegre Salgado Filho Airport?

  • How old do you have to be to fly from London Heathrow Airport to Porto Alegre Salgado Filho Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Porto Alegre Salgado Filho Airport.

  • What documentation or ID do you need to fly to Porto Alegre Salgado Filho Airport?

    The required travel and health documents for your Porto Alegre Salgado Filho Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Porto Alegre Salgado Filho Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from London Heathrow Airport to Porto Alegre?

Best airlines flying from London Heathrow Airport to Porto Alegre

Compare and see reviews for airlines that fly from London Heathrow Airport to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom £641Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom £654Free CancellationRating
7.5
1,465 reviews
Search Air France flights
LATAM AirlinesPriceFrom £716Free CancellationRating
7.5
1,822 reviews
Search LATAM Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Porto Alegre?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto Alegre from London.

Can I find flights from London to Porto Alegre with flexible booking policies on momondo?

Yes. All flights to Porto Alegre from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Porto Alegre?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Porto Alegre.

I’m not ready to book a flight from London to Porto Alegre right now. Can momondo alert me if prices change?

Price alerts on flights to Porto Alegre from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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