Cheap flights from London Heathrow Airport to Buenos Aires from £451
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 Heathrow Airport to Buenos Aires departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Buenos Aires
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
British Airways flights from London Heathrow Airport to Buenos Aires
Our best British Airways deals on London Heathrow Airport to Buenos Aires flight tickets
Lufthansa flights from London Heathrow Airport to Buenos Aires
Our best Lufthansa deals on London Heathrow Airport to Buenos Aires flight tickets
See travel insights to Buenos Aires from
How to get the cheapest flight ticket from London Heathrow Airport to Buenos Aires
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 Buenos Aires?
In general, January is the cheapest month to fly from London Heathrow Airport to Buenos Aires. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £831. If you don’t want to visit Buenos Aires in January, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £850.
What is the cheapest day to depart on your flight to Buenos Aires?
The cheapest day to depart on your flight to Buenos Aires is on a Wednesday when prices can be found for as low as £947. This is often the case because there is less demand to fly during this day of the week. 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 £1,102.
What is the cheapest time of day to depart on your flight to Buenos Aires?
Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from London Heathrow Airport to Buenos Aires during this time can be as low as £826. Flights to Buenos Aires are more costly in the evening, with an average ticket price of £1,027. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest London Heathrow to Buenos Aires flight route?
Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London Heathrow - Buenos Aires flight prices
How far in advance should I book a flight to Buenos Aires?
You are more likely to see cheaper flights to Buenos Aires from London Heathrow Airport when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around £969 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from London Heathrow Airport for as low as £832 on momondo.
What cabin class options are available on London Heathrow to Buenos Aires flights?
There are 2 cabin classes available to choose from on London Heathrow to Buenos Aires flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from London Heathrow to Buenos Aires?
Avianca, Aeromexico, and United Airlines are the most popular carriers operating from London Heathrow to Buenos Aires
Which airlines fly to Buenos Aires?
British Airways, Iberia and Lufthansa are the top three most popular airlines that fly to Buenos Aires from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 47% of people opting to fly with this airline when travelling to Buenos Aires. Keep in mind that there are 8 different airlines that fly to Buenos Aires on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Buenos Aires on average per day?
The number of flights available between London Heathrow Airport and Buenos Aires is 1 per day as of May 2025. The most frequent departure time is 21:00, with 100% of daily flights leaving in the evening.
How many flights depart from London Heathrow Airport to Buenos Aires on average per week?
The number of flights available between London Heathrow Airport and Buenos Aires is 12 per week as of May 2025. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.
When to book flights from London Heathrow Airport to Buenos Aires
Cheap London Heathrow Airport to Buenos Aires (LHR to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Buenos Aires
Best price found | £451 |
|---|---|
Fastest flight time | 16h 00m |
Direct flights | Mon, Tue, Wed, Fri, Sat and Sun |
Airports in Buenos Aires | 2 airports |
How far is London Heathrow to Buenos Aires by plane?
Buenos Aires is 6898.3 mi away from London Heathrow. In terms of flight time, this usually takes a little over 16h 00m.
When did momondo last update prices for flights from London Heathrow Airport to Buenos Aires?
Prices for flights from London Heathrow Airport to Buenos Aires are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Buenos Aires?
There are 8 operators available for flights from London Heathrow Airport to Buenos Aires as of May 2025.
How old do you have to be to fly from London Heathrow Airport to Buenos Aires?
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 Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The travel and health documents you'll need for your trip to Buenos Aires may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buenos Aires. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to Buenos Aires?
Based on momondo bookings for flights between London Heathrow Airport and Buenos Aires, the leading plane model is Boeing 777, making up 51.59% of the total bookings. Other popular models include Airbus A350-1000 with 48.41%.
What is the most popular airline from London Heathrow Airport to Buenos Aires?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to Buenos Aires is British Airways (38% of total bookings). The next most popular airlines are Iberia (15%), Lufthansa (13%), and LATAM Airlines (12%).
Best airlines flying from London Heathrow Airport to Buenos Aires
Compare and see reviews for airlines that fly from London Heathrow Airport to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £448 | Free Cancellation | Rating 7.4 1,446 reviews | |||
| PriceFrom £647 | Free Cancellation | Rating 7.0 9,252 reviews | |||
| PriceFrom £698 | Free Cancellation | Rating 7.0 2,701 reviews | |||
| PriceFrom £732 | Free Cancellation | Rating 6.7 7,045 reviews | |||
| PriceFrom £740 | Free Cancellation | Rating 7.6 1,275 reviews | |||
| PriceFrom £755 | Free Cancellation | Rating 6.6 6,842 reviews | |||
| PriceFrom £839 | Free Cancellation | Rating 7.8 1,334 reviews | |||
| PriceFrom £870 | Free Cancellation | Rating 7.5 1,767 reviews |
Iberia Flights From London Heathrow Airport to Buenos Aires
Iberia flies from London Heathrow Airport to Buenos Aires around 6 times per week, with 2,701 momondo users rating the airline 7.0/10. The cheapest Iberia deal from London Heathrow Airport to Buenos Aires in the last 72 hours was £932 (round-trip), much lower than the average airfare cost of £1,202 for Iberia flights on this route.
British Airways Flights From London Heathrow Airport to Buenos Aires
British Airways is also a popular choice for this route. British Airways flight deals for London Heathrow Airport to Buenos Aires start from as low as £1,009 round-trip, depending on your selected dates, with average British Airways deals seen on momondo around £1,359. British Airways operates 6 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 6.6/10 across 6,842 reviews.
Why use momondo?
Why should I use momondo to find a flight deal from London to Buenos Aires?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Buenos Aires . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from London to Buenos Aires with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Buenos Aires from London with this policy.
How can momondo help me find flights from London to Buenos Aires?
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 Buenos Aires.
I’m not ready to book a flight from London to Buenos Aires right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of London to Buenos Aires flights. All you need is a valid email address and we will do the rest; it is that quick and easy.