Cheap flights from London to Buenos Aires from £377
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 Buenos Aires departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from London 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 typical price of a round-trip flight between London and Buenos Aires?
What is the cheapest month to fly to Buenos Aires?
In general, November is the cheapest month to fly from London to Buenos Aires. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £804. If you don’t want to visit Buenos Aires in November, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of £809.
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 Tuesday when prices can be found for as low as £944. 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 because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,068.
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 to Buenos Aires during this time can be as low as £809. Flights to Buenos Aires are more costly in the evening, with an average ticket price of £1,012. 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 to Buenos Aires flight route?
Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around £977 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from London for as low as £818 on momondo.
What cabin class options are available on London to Buenos Aires flights?
There are 2 cabin classes available to choose from on London to Buenos Aires flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on London to Buenos Aires flights?
You could potentially save up to 17% on your flight if you consider stops on a London to Buenos Aires flight.
How have London to Buenos Aires flight prices changed over time?
As of July 2025, prices for London to Buenos Aires flights are approximately 17% cheaper when compared to flights at the same time last year.
How many flights depart from London to Buenos Aires on average per day?
As of July 2025, 2 flights take off from London and land in Buenos Aires each day. The most common flight departure time for this route is 21:00, with 100% of daily flights taking off in the evening.
How many flights depart from London to Buenos Aires on average per week?
The number of flights available between London and Buenos Aires is 17 per week as of July 2025. The most frequent departure day is Tue, with 18% of weekly flights leaving on this day.
When to book flights from London to Buenos Aires
Cheap London to Buenos Aires (LON to BUE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Buenos Aires
Best price found | £377 |
|---|---|
Fastest flight time | 15h 40m |
Direct flights | Every day |
Airports in Buenos Aires | 2 airports |
How far is London to Buenos Aires by plane?
The straight-line distance from London to Buenos Aires is 6909.8 mi. Typically, this will take 15h 40m by plane in normal conditions.
When did momondo last update prices for flights from London to Buenos Aires?
Prices for flights from London to Buenos Aires are refreshed on a daily basis.
How many operators does momondo search for flights from London to Buenos Aires?
There are 10 operators available for flights from London to Buenos Aires as of July 2025.
How old do you have to be to fly from London to Buenos Aires?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Buenos Aires.
What documentation or ID do you need to fly to Buenos Aires?
The required travel and health documents for your Buenos Aires trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Buenos Aires. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London to Buenos Aires?
Based on momondo bookings for flights between London and Buenos Aires, the leading plane model is Boeing 777, making up 81.40% of the total bookings. Other popular models include Airbus A350-1000 with 18.60%.
What is the most popular airline from London to Buenos Aires?
momondo data reveals that the most frequently booked airline on the route from London to Buenos Aires is British Airways, representing 27% of all bookings. The subsequent popular airlines are Air Europa at 23%, Iberia at 11%, and Lufthansa at 8%.
Best airlines flying from London to Buenos Aires
Compare and see reviews for airlines that fly from London to Buenos Aires with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £439 | Free Cancellation | Rating 7.5 1,473 reviews | |||
| PriceFrom £573 | Free Cancellation | Rating 7.0 542 reviews | |||
| PriceFrom £608 | Free Cancellation | Rating 6.7 1,000 reviews | |||
| PriceFrom £634 | Free Cancellation | Rating 7.1 9,659 reviews | |||
| PriceFrom £683 | Free Cancellation | Rating 7.0 2,819 reviews | |||
| PriceFrom £724 | Free Cancellation | Rating 7.6 1,304 reviews | |||
| PriceFrom £748 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom £773 | Free Cancellation | Rating 7.8 1,366 reviews | |||
| PriceFrom £801 | Free Cancellation | Rating 6.8 7,207 reviews | |||
| PriceFrom £852 | Free Cancellation | Rating 7.5 1,802 reviews |
Finnair Flights From London to Buenos Aires
Finnair flight deals from London to Buenos Aires start from £989 round-trip. Over the 6 Finnair flights for this route in a normal week, average airfare is usually £1,189 round-trip - but some users have found much cheaper deals with momondo.
Iberia Flights From London to Buenos Aires
Iberia is also a popular choice for this route. Iberia flight deals for London to Buenos Aires start from as low as £932 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £1,364. Iberia operates 5 flights to Buenos Aires from London in an average week. Users have rated it 7.0/10 across 2,820 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?
momondo does allow users to show only those flights to Buenos Aires from London which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from London to Buenos Aires?
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 Buenos Aires from London.
I’m not ready to book a flight from London to Buenos Aires right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Buenos Aires 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.