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Cheap flights from London Heathrow Airport to San Salvador from £394

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAL
19 Aug — 26 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to San Salvador

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Salvador
Explore the most affordable flight options available from Heathrow to San Salvador. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 July 2026.

Thu 20/822:05
LHR
-
SAL
1 stop24h 35m
Avianca
Thu 8/1012:05
SAL
-
LHR
1 stop20h 30m
Avianca
Deal found 20/7£683
Thu 5/1121:40
LHR
-
SAL
1 stop19h 25m
Avianca
Sat 14/1112:05
SAL
-
LHR
1 stop20h 30m
Avianca
Deal found 19/7£686
Wed 19/807:25
LHR
-
SAL
2 stops20h 24m
United Airlines
Wed 7/1006:00
SAL
-
LHR
1 stop22h 35m
United Airlines
Deal found 20/7£689
Sat 31/1007:30
LHR
-
SAL
2 stops19h 15m
United Airlines
Sun 15/1123:54
SAL
-
LHR
1 stop14h 41m
United Airlines
Deal found 19/7£690
Tue 3/1106:50
LHR
-
SAL
2 stops21h 57m
United Airlines
Mon 16/1107:00
SAL
-
LHR
1 stop18h 40m
United Airlines
Deal found 19/7£691

Find flight deals from Heathrow to San Salvador

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Salvador (SAL). 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 20 July 2026.

Round-trip from

£683

One-way from

£394

Popular in

September

Cheapest in

November

Average price

£678
Avianca
  • Avianca
  • 20/8-8/10
  • 2 total stops
  • 45h 05m total
  • London to San Salvador
Search Deals
Avianca
  • Avianca
  • 18/9
  • 1 total stop
  • 24h 35m total
  • London to San Salvador
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to San Salvador 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 20 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Salvador that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Thu 20/8

06:55-20:49

2 stops20h 54m

San Salvador El Salvador Intl

Wed 26/8

06:00-07:45

1 stop18h 45m

£686

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Wed 4/11

06:50-22:47

2 stops21h 57m

San Salvador El Salvador Intl

Mon 16/11

07:00-12:00

2 stops23h 00m

£691

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Mon 10/8

17:50-21:35

2 stops34h 45m

San Salvador El Salvador Intl

Sat 12/9

06:00-09:40

2 stops20h 40m

£710

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Thu 13/8

16:40-11:29

1 stop25h 49m

San Salvador El Salvador Intl

Thu 20/8

06:00-07:45

1 stop18h 45m

£714

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Sat 1/8

08:00-20:49

2 stops19h 49m

San Salvador El Salvador Intl

Sun 16/8

15:40-07:45

1 stop33h 05m

£717

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Wed 5/8

16:40-11:29

1 stop25h 49m

San Salvador El Salvador Intl

Tue 11/8

22:45-20:40

1 stop14h 55m

£717

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Wed 5/8

16:40-11:29

1 stop25h 49m

San Salvador El Salvador Intl

Sat 15/8

06:00-07:55

1 stop18h 55m

£717

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Sun 9/8

17:50-21:35

2 stops34h 45m

San Salvador El Salvador Intl

Sat 12/9

22:45-21:20

1 stop15h 35m

£732
Cheapest one-way

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Fri 18/9

22:05-15:40

1 stop24h 35m

£394
Fastest single journey

LondonSan Salvador

LHR - SAL

LHRSAL

London Heathrow

Thu 20/8

22:05-11:05

1 stop20h 00m

£415

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to San Salvador

Have a flexible travel schedule? Discover the best time to fly to San Salvador from Heathrow 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 Heathrow Airport to San Salvador

How far ahead should I book a flight from London Heathrow Airport to San Salvador?

Booking 76 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to San Salvador. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to San Salvador?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to San Salvador (average of £609). Flying from London Heathrow Airport to San Salvador in September is currently the most expensive (average of £796). 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.

How much does it cost for a return flight from London Heathrow Airport to San Salvador?

Reviews of airlines servicing San Salvador

Get insights into the airlines that provide service to San Salvador. 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 San Salvador. Reviews last updated 20 July 2026.
Check out reviews from past customers who have flown with United Airlines,Air Canada, andLufthansa from London Heathrow Airport to San Salvador to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,015 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
United Airlines
7.4
Good
10,015 reviews
United Airlines
7.4
Good
10,015 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
Air Canada
7.1
Good
11,360 reviews
United Airlines
7.4
Good
10,015 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
Lufthansa
6.8
Okay
8,152 reviews
United Airlines
7.4
Good
10,015 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
Avianca
6.5
Okay
2,524 reviews
United Airlines
7.4
Good
10,015 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Salvador. 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 San Salvador from London Heathrow?

    Most people fly into San Salvador El Salvador Intl (SAL) if they book a flight to San Salvador from London Heathrow. On average, El Salvador Intl has 0 inbound flights from London Heathrow per day from 4 airlines. San Salvador El Salvador Intl is conveniently located just 20.5 mi from San Salvador’s city center.

  • How long is the flight from London Heathrow Airport to San Salvador?

    Airlines like United Airlines fly from London Heathrow Airport to San Salvador in about 20h 54m. The time it takes to get you to your destination can typically vary by up to . There are 5431 mi between London Heathrow Airport and San Salvador.

  • What are the cheapest airlines flying from London Heathrow Airport to San Salvador round-trip?

    Flying on Avianca is currently your cheapest option to San Salvador, with prices starting at £501. Additional return tickets that might be worth considering are offered by United Airlines and Lufthansa, with the lowest prices starting at £555 and £587, respectively. These flights start at 28% lower than the current average price 3 months from now.

  • Can I find deals for flights from Heathrow to San Salvador that include hotel bookings?

    Yes. In addition to deals on Heathrow to San Salvador flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to San Salvador?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Salvador.

  • Can I find deals for business class flights from Heathrow to San Salvador?

    Yes. Cheapflights offers flight deals from Heathrow to San Salvador 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 Heathrow Airport to San Salvador?

    Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to San Salvador (average of £609). Flying from London Heathrow Airport to San Salvador in September is currently the most expensive (average of £796). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to San Salvador

See prices for flight routes from nearby airports that may be better suited for you.
London City to San Salvador flights
Gatwick to San Salvador flights
Stansted to San Salvador flights

Top 4 airlines flying from Heathrow to San Salvador

Discover the top 4 airlines that operate flights from Heathrow to San Salvador. 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 20 July 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£501Average£608FlexibilityNo cancel feeOn-time71%
Search Avianca flights
United AirlinesCheapest£555Average£683FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£587Average£662FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£613Average£796FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 Heathrow to San Salvador?

Deals for Heathrow to San Salvador flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Salvador?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to San Salvador 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 Heathrow to San Salvador with no change fees?

Yes, we can. To see specific flights from Heathrow to San Salvador 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 Heathrow to San Salvador become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to San Salvador 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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