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Cheap flights from London to Porto Alegre from £420

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 6/1. 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
06:00 - 09:45
LHR
-
POA
30h 45m2 stops
Multiple Airlines Logo
05:25 - 14:35
POA
-
LHR
30h 10m2 stops
£811Multiple Airlines
Wed, 28 Jan - Wed, 4 Feb
Multiple Airlines Logo
07:20 - 23:55
LGW
-
POA
19h 35m2 stops
Multiple Airlines Logo
10:30 - 11:40
POA
-
LGW
21h 10m2 stops
£819Multiple Airlines
Tue, 24 Mar - Tue, 14 Apr
LATAM Airlines Logo
06:55 - 00:40
LHR
-
POA
20h 45m2 stops
LATAM Airlines Logo
14:50 - 14:05
POA
-
LHR
20h 15m1 stop
£828LATAM Airlines
Tue, 3 Feb - Tue, 10 Feb
LATAM Airlines Logo
06:55 - 00:40
LHR
-
POA
20h 45m2 stops
LATAM Airlines Logo
20:10 - 14:05
POA
-
LHR
14h 55m1 stop
£828LATAM Airlines
Mon, 2 Mar - Thu, 19 Mar
Air Europa Logo
10:00 - 15:40
LGW
-
POA
32h 40m2 stops
Air Europa Logo
10:30 - 16:25
POA
-
LGW
26h 55m2 stops
£846Air Europa
Fri, 20 Feb - Thu, 5 Mar
Air Europa Logo
10:00 - 09:45
LGW
-
POA
27h 45m2 stops
Air Europa Logo
05:30 - 16:25
POA
-
LGW
30h 55m2 stops
£883Air Europa
Mon, 18 May - Mon, 8 Jun
TAP AIR PORTUGAL Logo
16:35 - 19:40
LGW
-
POA
30h 05m1 stop
TAP AIR PORTUGAL Logo
15:30 - 15:35
POA
-
LGW
20h 05m2 stops
£888TAP AIR PORTUGAL
Mon, 23 Mar - Tue, 21 Apr
TAP AIR PORTUGAL Logo
16:35 - 17:55
LGW
-
POA
28h 20m1 stop
TAP AIR PORTUGAL Logo
21:55 - 09:45
POA
-
LGW
31h 50m1 stop
£923TAP AIR PORTUGAL
Wed, 4 Mar - Thu, 9 Apr
KLM Logo
08:25 - 23:40
LCY
-
POA
19h 15m2 stops
KLM Logo
18:25 - 16:40
POA
-
LCY
18h 15m2 stops
£924KLM
Mon, 18 May - Mon, 8 Jun
KLM Logo
07:45 - 00:45
LCY
-
POA
20h 00m2 stops
KLM Logo
16:50 - 16:40
POA
-
LCY
19h 50m2 stops
£1,028KLM
Tue, 24 Mar - Tue, 14 Apr

LATAM Airlines flights from London to Porto Alegre

Our best LATAM Airlines deals on London to Porto Alegre flight tickets
LATAM Airlines
3 Feb
LHR06:55London Heathrow
20h 45m
2 stops
POA00:40Porto Alegre Salgado Filho
10 Feb
POA14:50Porto Alegre Salgado Filho
20h 15m
1 stop
LHR14:05London Heathrow
£828
Find similar
LATAM Airlines
2 Mar
LHR06:55London Heathrow
20h 45m
2 stops
POA00:40Porto Alegre Salgado Filho
19 Mar
POA20:10Porto Alegre Salgado Filho
14h 55m
1 stop
LHR14:05London Heathrow
£828
Find similar
LATAM Airlines
3 Feb
LHR06:55London Heathrow
20h 45m
2 stops
POA00:40Porto Alegre Salgado Filho
10 Feb
POA20:10Porto Alegre Salgado Filho
18h 05m
2 stops
LHR17:15London Heathrow
£845
Find similar

Turkish Airlines flights from London to Porto Alegre

Our best Turkish Airlines deals on London to Porto Alegre flight tickets
Turkish Airlines
4 May
LHR13:15London Heathrow
24h 00m
2 stops
POA09:15Porto Alegre Salgado Filho
21 May
POA15:15Porto Alegre Salgado Filho
40h 25m
2 stops
LHR11:40London Heathrow
£874
Find similar
Turkish Airlines
18 Feb
LGW17:05London Gatwick
42h 40m
2 stops
POA08:45Porto Alegre Salgado Filho
8 Mar
POA11:15Porto Alegre Salgado Filho
56h 15m
2 stops
LGW22:30London Gatwick
£973
Find similar
Turkish Airlines
21 Feb
LGW06:15London Gatwick
53h 10m
2 stops
POA08:25Porto Alegre Salgado Filho
8 Mar
POA11:15Porto Alegre Salgado Filho
49h 55m
2 stops
LGW16:10London Gatwick
£983
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 16 December 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

LHR - POA

LHRPOA

London Heathrow

Wed 28/1

06:00-09:45

2 stops30h 45m

Porto Alegre Salgado Filho

Wed 4/2

05:25-14:35

2 stops30h 10m

£811

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Tue 24/3

07:20-23:55

2 stops19h 35m

Porto Alegre Salgado Filho

Tue 14/4

10:30-11:40

2 stops21h 10m

£819

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 3/2

06:55-00:40

2 stops20h 45m

Porto Alegre Salgado Filho

Tue 10/2

14:50-14:05

1 stop20h 15m

£828

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 2/3

06:55-00:40

2 stops20h 45m

Porto Alegre Salgado Filho

Thu 19/3

20:10-14:05

1 stop14h 55m

£828

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Fri 20/2

10:00-15:40

2 stops32h 40m

Porto Alegre Salgado Filho

Thu 5/3

10:30-16:25

2 stops26h 55m

£846

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Mon 18/5

10:00-09:45

2 stops27h 45m

Porto Alegre Salgado Filho

Mon 8/6

05:30-16:25

2 stops30h 55m

£883

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Mon 23/3

16:35-19:40

1 stop30h 05m

Porto Alegre Salgado Filho

Tue 21/4

15:30-15:35

2 stops20h 05m

£888

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Wed 4/3

16:35-17:55

1 stop28h 20m

Porto Alegre Salgado Filho

Thu 9/4

21:55-09:45

1 stop31h 50m

£923

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Mon 18/5

08:25-23:40

2 stops19h 15m

Porto Alegre Salgado Filho

Mon 8/6

18:25-16:40

2 stops18h 15m

£924

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Tue 24/3

07:45-00:45

2 stops20h 00m

Porto Alegre Salgado Filho

Tue 14/4

16:50-16:40

2 stops19h 50m

£1,028

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, April 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 £770. If you aren’t able to travel during the month of April, then book flights to Porto Alegre from London during May instead. Flights to Porto Alegre in May, while not as cheap as those in April, still average around £777.

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 £828. 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 £1,002.

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 £872. Flights to Porto Alegre are more costly in the evening, with an average ticket price of £937. 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 £941 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 £717 on momondo.

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

As of December 2025, prices for London to Porto Alegre flights are approximately 37% 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.
Search flight deals

  • 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 18h 50m.

  • 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 £635Free CancellationRating
7.2
2,090 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom £647Free CancellationRating
7.4
1,506 reviews
Search Air France flights
LATAM AirlinesPriceFrom £707Free CancellationRating
7.5
1,891 reviews
Search LATAM Airlines flights
Virgin AtlanticPriceFrom £1,126Free 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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LATAM Airlines
TAP AIR PORTUGAL
Virgin Atlantic
Air France