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Cheap flights from London to Porto Alegre from £447

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Porto Alegre departing on 15/1. 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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0 bags

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Find the cheapest flights from London to Porto Alegre (LON-POA)

Cheap return flights

Logo
06:00 - 07:50LGW-POA
29h 50m2 stops
Logo
09:05 - 14:15POA-LGW
26h 10m2 stops
£595
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Di, 9 Sep - Sa, 29 Nov
Logo
06:00 - 07:50LGW-POA
29h 50m2 stops
Logo
09:05 - 14:15POA-LGW
26h 10m3 stops
£596
Find Deal
Di, 9 Sep - Sa, 29 Nov
KLM Logo
08:40 - 00:30LHR-POA
19h 50m2 stops
KLM Logo
13:55 - 17:35POA-LHR
23h 40m2 stops
£686KLM
Find Deal
Fr, 19 Sep - Do, 16 Okt
TAP AIR PORTUGAL Logo
19:50 - 20:25LHR-POA
28h 35m1 stop
TAP AIR PORTUGAL Logo
00:15 - 22:00POA-LHR
17h 45m1 stop
£739TAP AIR PORTUGAL
Find Deal
Mi, 1 Okt - Di, 7 Okt
TAP AIR PORTUGAL Logo
06:00 - 19:40LHR-POA
16h 40m1 stop
TAP AIR PORTUGAL Logo
21:10 - 17:30POA-LHR
17h 20m1 stop
£741TAP AIR PORTUGAL
Find Deal
Di, 4 Nov - Sa, 29 Nov
LATAM Airlines Logo
21:20 - 22:40LHR-POA
29h 20m2 stops
LATAM Airlines Logo
20:00 - 15:05POA-LHR
15h 05m1 stop
£782LATAM Airlines
Find Deal
Mo, 15 Sep - Di, 14 Okt
KLM Logo
08:40 - 00:30LHR-POA
19h 50m2 stops
KLM Logo
13:35 - 16:15POA-LHR
22h 40m2 stops
£798KLM
Find Deal
Fr, 19 Sep - Sa, 18 Okt
LATAM Airlines Logo
11:25 - 11:30LHR-POA
27h 05m2 stops
LATAM Airlines Logo
04:40 - 14:05POA-LHR
30h 25m1 stop
£854LATAM Airlines
Find Deal
Sa, 8 Nov - Fr, 21 Nov
Air Europa Logo
17:25 - 16:30LGW-POA
26h 05m2 stops
Air Europa Logo
11:15 - 09:00POA-LGW
18h 45m2 stops
£891Air Europa
Find Deal
Di, 4 Nov - Sa, 29 Nov
Air Europa Logo
17:25 - 15:55LGW-POA
25h 30m2 stops
Air Europa Logo
11:15 - 09:00POA-LGW
18h 45m2 stops
£903Air Europa
Find Deal
Sa, 15 Nov - Sa, 29 Nov

KLM flights from London to Porto Alegre

Our best KLM deals on London to Porto Alegre flight tickets
KLM
19 Sept
LHR08:40London Heathrow
19h 50m
2 stops
POA00:30Porto Alegre Salgado Filho
16 Oct
POA13:55Porto Alegre Salgado Filho
23h 40m
2 stops
LHR17:35London Heathrow
£686
Find similar
KLM
19 Sept
LHR08:40London Heathrow
19h 50m
2 stops
POA00:30Porto Alegre Salgado Filho
18 Oct
POA13:35Porto Alegre Salgado Filho
22h 40m
2 stops
LHR16:15London Heathrow
£798
Find similar
KLM
18 Sept
LHR08:40London Heathrow
20h 15m
2 stops
POA00:55Porto Alegre Salgado Filho
16 Oct
POA13:55Porto Alegre Salgado Filho
23h 40m
2 stops
LHR17:35London Heathrow
£799
Find similar

LATAM Airlines flights from London to Porto Alegre

Our best LATAM Airlines deals on London to Porto Alegre flight tickets
LATAM Airlines
15 Sept
LHR21:20London Heathrow
29h 20m
2 stops
POA22:40Porto Alegre Salgado Filho
14 Oct
POA20:00Porto Alegre Salgado Filho
15h 05m
1 stop
LHR15:05London Heathrow
£782
Find similar
LATAM Airlines
8 Nov
LHR11:25London Heathrow
27h 05m
2 stops
POA11:30Porto Alegre Salgado Filho
21 Nov
POA04:40Porto Alegre Salgado Filho
30h 25m
1 stop
LHR14:05London Heathrow
£854
Find similar
LATAM Airlines
17 Sept
LHR21:20London Heathrow
16h 00m
1 stop
POA09:20Porto Alegre Salgado Filho
18 Oct
POA20:00Porto Alegre Salgado Filho
15h 05m
1 stop
LHR15:05London Heathrow
£856
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London 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 19 August 2025.
Use the filters below to find and compare flights from London to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Di 9/9

06:00-07:50

2 stops29h 50m

Porto Alegre Salgado Filho

Sa 29/11

09:05-14:15

2 stops26h 10m

£595

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Di 9/9

06:00-07:50

2 stops29h 50m

Porto Alegre Salgado Filho

Sa 29/11

09:05-14:15

3 stops26h 10m

£596

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fr 19/9

08:40-00:30

2 stops19h 50m

Porto Alegre Salgado Filho

Do 16/10

13:55-17:35

2 stops23h 40m

£686

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mi 1/10

19:50-20:25

1 stop28h 35m

Porto Alegre Salgado Filho

Di 7/10

00:15-22:00

1 stop17h 45m

£739

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Di 4/11

06:00-19:40

1 stop16h 40m

Porto Alegre Salgado Filho

Sa 29/11

21:10-17:30

1 stop17h 20m

£741

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mo 15/9

21:20-22:40

2 stops29h 20m

Porto Alegre Salgado Filho

Di 14/10

20:00-15:05

1 stop15h 05m

£782

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fr 19/9

08:40-00:30

2 stops19h 50m

Porto Alegre Salgado Filho

Sa 18/10

13:35-16:15

2 stops22h 40m

£798

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sa 8/11

11:25-11:30

2 stops27h 05m

Porto Alegre Salgado Filho

Fr 21/11

04:40-14:05

1 stop30h 25m

£854

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Di 4/11

17:25-16:30

2 stops26h 05m

Porto Alegre Salgado Filho

Sa 29/11

11:15-09:00

2 stops18h 45m

£891

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Sa 15/11

17:25-15:55

2 stops25h 30m

Porto Alegre Salgado Filho

Sa 29/11

11:15-09:00

2 stops18h 45m

£903

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto Alegre from

How to get the cheapest flight ticket from London 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 and Porto Alegre?

What is the cheapest month to fly to Porto Alegre?

In general, October is the cheapest month to fly from London to Porto Alegre. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £627. If you aren’t able to travel during the month of October, then book flights to Porto Alegre from London during May instead. Flights to Porto Alegre in May, while not as cheap as those in October, still average around £712.

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 is on a Thursday. momondo users have found tickets for Thursday departures for as low as £818. 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 because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £990.

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 to Porto Alegre during this time can be as low as £861. Flights to Porto Alegre are more costly in the evening, with an average ticket price of £926. 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto Alegre for around £998 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 for as low as £740 on momondo.

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

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

How have London to Porto Alegre flight prices changed over time?

When to book flights from London to Porto Alegre

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

Cheap London to Porto Alegre (LON to POA) flight deals and tips

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

Best price found

£447

Fastest flight time

16h 00m

Direct flights

None

Airports in Porto Alegre

1 airport
The best one-way flight to Porto Alegre from London in the past 72 hours is £447. The best return flight deal from London to Porto Alegre found on momondo in the last 72 hours is £595.
The fastest flight from London to Porto Alegre takes 16h 00m
There are no direct flights from London to Porto Alegre. Popular non-direct routes for this connection are London Gatwick Airport - Porto Alegre Salgado Filho Airport, London Heathrow Airport - Porto Alegre Salgado Filho Airport and London City 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 to Porto Alegre Salgado Filho by plane?

    Porto Alegre Salgado Filho is 6424.7 mi away from London. In terms of flight time, this usually takes a little over 16h 00m.

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

    Prices for flights from London to Porto Alegre Salgado Filho Airport are refreshed on a daily basis.

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

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

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

    The necessary travel and health documents for your Porto Alegre Salgado Filho Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from London to Porto Alegre

Compare and see reviews for airlines that fly from London to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom £627Free CancellationRating
7.1
1,956 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom £640Free CancellationRating
7.4
1,469 reviews
Search Air France flights
LATAM AirlinesPriceFrom £700Free CancellationRating
7.5
1,844 reviews
Search LATAM Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Porto Alegre for you.

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

Yes. momondo allows you to filter the results for London to Porto Alegre flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto Alegre from London.

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

Yes momondo offers price alerts on flights to Porto Alegre from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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KLM
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