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Cheap flights from London to Porto Alegre from £389

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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — POA
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Porto Alegre Salgado Filho are usually found in November or May, booked 81 days in advance, depart on a Thursday or Tuesday and return on a Friday

Find flight deals from London to Porto Alegre

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Cheapest flights from London to Porto Alegre
Explore the most affordable flight options available from London to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Tue 11/1117:00LHR - POA
2 stops27h 05mAmerican Airlines
Tue 3/317:55POA - LHR
2 stops25h 15mAmerican Airlines
Deal found 5/11£956
Tue 11/1117:00LHR - POA
2 stops27h 05mAmerican Airlines
Tue 10/317:55POA - LHR
2 stops25h 15mAmerican Airlines
Deal found 4/11£960
Tue 18/1118:30LHR - POA
2 stops21h 45mLufthansa
Thu 12/212:30POA - LHR
2 stops18h 15mLufthansa
Deal found 5/11£968
Tue 18/1108:25LCY - POA
2 stops38h 45mITA Airways
Thu 12/209:35POA - LCY
2 stops22h 20mITA Airways
Deal found 5/11£1,000
Tue 11/1108:25LCY - POA
2 stops38h 45mITA Airways
Thu 12/209:35POA - LCY
2 stops22h 20mITA Airways
Deal found 5/11£1,020
Tue 11/1116:45LCY - POA
2 stops30h 25mITA Airways
Tue 10/309:35POA - LCY
2 stops27h 35mITA Airways
Deal found 4/11£1,024
Tue 11/1108:25LCY - POA
2 stops38h 45mITA Airways
Tue 17/205:30POA - LCY
2 stops26h 25mITA Airways
Deal found 5/11£1,043
Tue 11/1115:35LHR - POA
2 stops28h 30mAmerican Airlines
Thu 12/218:00POA - LHR
2 stops25h 10mAmerican Airlines
Deal found 5/11£1,056
Tue 11/1118:00LHR - POA
2 stops26h 55mMultiple Airlines
Tue 10/321:10POA - LHR
1 stop21h 25mMultiple Airlines
Deal found 4/11£1,089
Tue 11/1108:25LCY - POA
2 stops37h 20mMultiple Airlines
Mon 16/204:45POA - LCY
2 stops27h 10mMultiple Airlines
Deal found 5/11£1,122
Tue 11/1106:00LHR - POA
1 stop16h 40mTAP AIR PORTUGAL
Tue 10/321:10POA - LHR
1 stop21h 25mTAP AIR PORTUGAL
Deal found 4/11£1,124
Sat 15/1106:30LHR - POA
2 stops20h 00mKLM
Sat 29/1117:35POA - LHR
2 stops20h 25mKLM
Deal found 4/11£1,129

Cheap flight deals from London to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 6 November 2025.

Round-trip from

£814

One-way from

£389

Popular in

July

Cheapest in

November

Average price

£796
LATAM Airlines
  • LATAM Airlines
  • 2/2-10/3
  • 3 total stops
  • 60h 25m total
  • London to Porto Alegre
Search Deals
17/3
  • 17/3
  • 3 total stops
  • 31h 40m total
  • London to Porto Alegre
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£162 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 6 November 2025.
Use the filters below to find and compare flights from London to Porto Alegre that are best for you.

Fly from

London

Fly to

Porto Alegre

Route

Depart

Return

Price

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 19/3

16:30-11:35

2 stops22h 05m

Porto Alegre Salgado Filho

Mon 23/3

12:30-12:50

2 stops21h 20m

£862

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Thu 19/3

09:40-00:25

2 stops41h 45m

Porto Alegre Salgado Filho

Mon 23/3

14:55-17:40

2 stops23h 45m

£880

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 19/3

20:15-11:35

1 stop18h 20m

Porto Alegre Salgado Filho

Mon 23/3

14:55-14:05

2 stops20h 10m

£906

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Thu 19/3

18:40-11:35

2 stops19h 55m

Porto Alegre Salgado Filho

Mon 23/3

14:55-17:50

2 stops23h 55m

£939

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Wed 28/1

16:45-23:15

2 stops33h 30m

Porto Alegre Salgado Filho

Tue 24/2

05:30-16:10

2 stops31h 40m

£967

LondonPorto Alegre

LCY - POA

LCYPOA

London City

Tue 18/11

08:25-20:10

2 stops38h 45m

Porto Alegre Salgado Filho

Thu 12/2

09:35-10:55

2 stops22h 20m

£1,000

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 15/11

06:30-23:30

2 stops20h 00m

Porto Alegre Salgado Filho

Sat 29/11

17:35-17:00

2 stops20h 25m

£1,129

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Wed 7/1

16:35-19:20

1 stop29h 45m

Porto Alegre Salgado Filho

Tue 10/2

21:10-15:45

1 stop15h 35m

£1,151

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Sat 15/11

07:20-00:40

2 stops20h 20m

Porto Alegre Salgado Filho

Sat 29/11

17:55-14:05

1 stop17h 10m

£1,176

LondonPorto Alegre

LGW - POA

LGWPOA

London Gatwick

Tue 18/11

17:25-11:05

2 stops20h 40m

Porto Alegre Salgado Filho

Thu 12/2

09:35-16:25

2 stops27h 50m

£1,201

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 57 results
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Best time to book a flight from London to Porto Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre from London 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 to Porto Alegre

How far ahead should I book a flight from London to Porto Alegre?

Use this chart to determine the optimal time to book a return flight from London to Porto Alegre. Price data was last updated on 31 October 2025.

The best time to book flights from London to Porto Alegre is 80 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to Porto Alegre?

Currently, April is the cheapest month in which you can book a flight from London to Porto Alegre (average of £608). Flying from London to Porto Alegre in August is currently the most expensive (average of £945). 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.

What is the cheapest time of day to fly from LON to POA?

Find hourly flight availability from London to Porto Alegre. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 November 2025.

It’s optimal to fly from London to Porto Alegre at midday. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight in the evening.

How much does it cost for a return flight from London to Porto Alegre?

What’s the top stopover airport for flights from London to Porto Alegre?

Share of one-stop return flights from London to Porto Alegre chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Sao Paulo (GRU) – chosen by Cheapflights users on 72% of one-stop itineraries from London to Porto Alegre on Cheapflights.

What’s the cheapest stopover airport for flights from London to Porto Alegre?

Average return fare for one-stop flights from London to Porto Alegre, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Sao Paulo (GRU) is the most affordable one-stop option, with an average return flight price of £878.

What’s the fastest stopover option from London to Porto Alegre?

Shortest average travel time for one-stop one-way flights from London to Porto Alegre, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Sao Paulo (GRU) have the shortest average one-way travel time for one-stop routes: 16h 00m.

Which airport typically offers the quickest stopover for flights from London to Porto Alegre?

Average stopover duration for one-stop one-way flights from London to Porto Alegre, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Sao Paulo (GRU) offer the fastest connection on this route, with an average stopover time of 2h 50m.

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 6 November 2025.
Get a feel of what it's like to fly with KLM, LATAM Airlines, andVirgin Atlantic from London to Porto Alegre by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,405 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
LATAM Airlines
7.5
Good
1,874 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
672 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
TAP AIR PORTUGAL
7.1
Good
2,046 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,555 reviews
KLM
7.7
Good
1,405 reviews
Check prices

Comfort

7.7

Overall

7.7

Crew

8.4

Boarding

7.8

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from London 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?

    If you book a flight to Porto Alegre from London, you will be flying to Salgado Filho, which is the city’s only airport. Porto Alegre Salgado Filho (POA) is located 4.0 mi from the center of Porto Alegre. There are 0 flights from London to Salgado Filho per day from 4 different airlines.

  • How long is the flight from London to Porto Alegre?

    There are many flights that can get you from London to Porto Alegre in 18h 20m. Fly via Lufthansa, LATAM Airlines, or SWISS to get the fastest option. The distance between London and Porto Alegre is about 6410 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London to Porto Alegre round-trip?

    TAP AIR PORTUGAL, at £651, was found to be the cheapest airline from London to Porto Alegre.Alternate airlines flying return to your destination include Air France and LATAM Airlines. These flights start at 32% lower than the current average price 3 months from now.

  • What are the most popular routes from London to Porto Alegre?

    The most popular route from London to Porto Alegre is London Heathrow - Porto Alegre Salgado Filho. You may also consider London City - Porto Alegre Salgado Filho or London Gatwick - Porto Alegre Salgado Filho.

  • Can I find deals for flights from London to Porto Alegre that include hotel bookings?

    Yes. In addition to deals on London to Porto Alegre flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Porto Alegre?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Porto Alegre.

  • Can I find deals for business class flights from London to Porto Alegre?

    Yes. Cheapflights offers flight deals from London 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 to Porto Alegre?

    Currently, April is the cheapest month in which you can book a flight from London to Porto Alegre (average of £608). Flying from London to Porto Alegre in August is currently the most expensive (average of £945). 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

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Alternative routes for London to Porto Alegre

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Porto Alegre flights
Gatwick to Porto Alegre flights
Manchester to Porto Alegre flights
Birmingham to Porto Alegre flights
Edinburgh to Porto Alegre flights

Top 4 airlines flying from London to Porto Alegre

Discover the top 4 airlines that operate flights from London 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 6 November 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£651Average£952FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air FranceCheapest£664Average£724FlexibilityNo cancel feeOn-time77%
Search Air France flights
LATAM AirlinesCheapest£726Average£1,015FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
Virgin AtlanticCheapest£966Average£1,631FlexibilityNo 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 London to Porto Alegre?

Cheapflights makes it easy to find London to Porto Alegre flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from London to Porto Alegre?

Millions of users choose and trust Cheapflights to book the best flight deals from London to Porto Alegre for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from London to Porto Alegre with no change fees?

Yes, we can. To see specific flights from London to Porto Alegre with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Porto Alegre become cheaper?

Yes, Cheapflights offers price alerts on London to Porto Alegre flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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