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Cheap flights from London to Porto Alegre from £636

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 24/1. 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

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
17:25 - 17:50LGW-POA
27h 25m2 stops
Multiple Airlines Logo
10:30 - 09:00POA-LGW
19h 30m2 stops
£818Multiple Airlines
Find Deal
Thu, 5 Mar - Fri, 20 Mar
Turkish Airlines Logo
17:05 - 10:55LGW-POA
44h 50m2 stops
Turkish Airlines Logo
17:55 - 09:20POA-LGW
60h 25m2 stops
£823Turkish Airlines
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Tue, 3 Mar - Wed, 18 Mar
LATAM Airlines Logo
20:15 - 09:20LHR-POA
16h 05m1 stop
LATAM Airlines Logo
05:20 - 14:05POA-LHR
29h 45m2 stops
£826LATAM Airlines
Find Deal
Sat, 17 Jan - Tue, 17 Feb
SWISS Logo
20:05 - 11:35LHR-POA
42h 30m2 stops
SWISS Logo
14:55 - 08:15POA-LHR
38h 20m3 stops
£828SWISS
Find Deal
Sat, 7 Mar - Thu, 19 Mar
LATAM Airlines Logo
20:15 - 11:35LHR-POA
18h 20m1 stop
LATAM Airlines Logo
17:55 - 14:05POA-LHR
17h 10m1 stop
£833LATAM Airlines
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Thu, 5 Mar - Thu, 19 Mar
Lufthansa Logo
07:40 - 00:25LHR-POA
19h 45m2 stops
Lufthansa Logo
14:55 - 15:50POA-LHR
21h 55m2 stops
£839Lufthansa
Find Deal
Fri, 6 Mar - Fri, 20 Mar
SWISS Logo
18:40 - 11:35LGW-POA
19h 55m2 stops
SWISS Logo
14:55 - 17:50POA-LGW
23h 55m2 stops
£842SWISS
Find Deal
Thu, 5 Mar - Mon, 9 Mar
Lufthansa Logo
07:25 - 09:15LHR-POA
29h 50m2 stops
Lufthansa Logo
14:25 - 20:40POA-LHR
26h 15m2 stops
£846Lufthansa
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Mon, 4 May - Thu, 21 May
KLM Logo
07:45 - 00:45LCY-POA
20h 00m2 stops
KLM Logo
13:40 - 16:35POA-LCY
23h 55m2 stops
£1,042KLM
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Mon, 2 Mar - Thu, 19 Mar
KLM Logo
07:45 - 00:45LCY-POA
20h 00m2 stops
KLM Logo
13:40 - 16:35POA-LCY
23h 55m2 stops
£1,045KLM
Find Deal
Mon, 2 Mar - Thu, 19 Mar

KLM flights from London to Porto Alegre

Our best KLM deals on London to Porto Alegre flight tickets
KLM
2 Mar
LCY07:45London City
20h 00m
2 stops
POA00:45Porto Alegre Salgado Filho
19 Mar
POA13:40Porto Alegre Salgado Filho
23h 55m
2 stops
LCY16:35London City
£1,042
Find similar
KLM
2 Mar
LCY07:45London City
20h 00m
2 stops
POA00:45Porto Alegre Salgado Filho
19 Mar
POA13:40Porto Alegre Salgado Filho
23h 55m
2 stops
LCY16:35London City
£1,045
Find similar
KLM
4 Mar
LCY07:45London City
20h 00m
2 stops
POA00:45Porto Alegre Salgado Filho
9 Apr
POA18:30Porto Alegre Salgado Filho
18h 50m
2 stops
LCY17:20London City
£1,113
Find similar

Lufthansa flights from London to Porto Alegre

Our best Lufthansa deals on London to Porto Alegre flight tickets
Lufthansa
6 Mar
LHR07:40London Heathrow
19h 45m
2 stops
POA00:25Porto Alegre Salgado Filho
20 Mar
POA14:55Porto Alegre Salgado Filho
21h 55m
2 stops
LHR15:50London Heathrow
£839
Find similar
Lufthansa
4 May
LHR07:25London Heathrow
29h 50m
2 stops
POA09:15Porto Alegre Salgado Filho
21 May
POA14:25Porto Alegre Salgado Filho
26h 15m
2 stops
LHR20:40London Heathrow
£846
Find similar
Lufthansa
5 Mar
LCY09:40London City
28h 55m
2 stops
POA11:35Porto Alegre Salgado Filho
9 Mar
POA14:55Porto Alegre Salgado Filho
23h 45m
2 stops
LCY17:40London City
£849
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 27 November 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

Thu 5/3

17:25-17:50

2 stops27h 25m

Porto Alegre Salgado Filho

Fri 20/3

10:30-09:00

2 stops19h 30m

£818

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Tue 3/3

17:05-10:55

2 stops44h 50m

Porto Alegre Salgado Filho

Wed 18/3

17:55-09:20

2 stops60h 25m

£823

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 17/1

20:15-09:20

1 stop16h 05m

Porto Alegre Salgado Filho

Tue 17/2

05:20-14:05

2 stops29h 45m

£826

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 7/3

20:05-11:35

2 stops42h 30m

Porto Alegre Salgado Filho

Thu 19/3

14:55-08:15

3 stops38h 20m

£828

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 5/3

20:15-11:35

1 stop18h 20m

Porto Alegre Salgado Filho

Thu 19/3

17:55-14:05

1 stop17h 10m

£833

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fri 6/3

07:40-00:25

2 stops19h 45m

Porto Alegre Salgado Filho

Fri 20/3

14:55-15:50

2 stops21h 55m

£839

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Thu 5/3

18:40-11:35

2 stops19h 55m

Porto Alegre Salgado Filho

Mon 9/3

14:55-17:50

2 stops23h 55m

£842

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 4/5

07:25-09:15

2 stops29h 50m

Porto Alegre Salgado Filho

Thu 21/5

14:25-20:40

2 stops26h 15m

£846

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Mon 2/3

07:45-00:45

2 stops20h 00m

Porto Alegre Salgado Filho

Thu 19/3

13:40-16:35

2 stops23h 55m

£1,042

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Mon 2/3

07:45-00:45

2 stops20h 00m

Porto Alegre Salgado Filho

Thu 19/3

13:40-16:35

2 stops23h 55m

£1,045

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 cheapest month to fly to Porto Alegre?

In general, May 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 £787. If you aren’t able to travel during the month of May, then book flights to Porto Alegre from London during February instead. Flights to Porto Alegre in February, while not as cheap as those in May, still average around £792.

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 £839. 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 £1,015.

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 £883. Flights to Porto Alegre are more costly in the evening, with an average ticket price of £949. 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 £963 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 £726 on momondo.

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

You could potentially save up to 3% 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?

As of November 2025, prices for London to Porto Alegre flights are approximately 79% more expensive when compared to flights at the same time last year.

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

Fastest flight time

18h 50m

Direct flights

None
The fastest flight from London to Porto Alegre takes 18h 50m
There are no direct flights from London to Porto Alegre. There are no popular flight routes from London to Porto Alegre.
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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 14h 25m.

  • 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 £643Free CancellationRating
7.1
2,075 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom £656Free CancellationRating
7.4
1,498 reviews
Search Air France flights
LATAM AirlinesPriceFrom £717Free CancellationRating
7.5
1,886 reviews
Search LATAM Airlines flights
Virgin AtlanticPriceFrom £954Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic 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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
LATAM Airlines
TAP AIR PORTUGAL
Virgin Atlantic
Air France