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Cheap flights from London Heathrow Airport to San Sebastian from £51

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — EAS
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to San Sebastian

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Sebastian
Explore the most affordable flight options available from Heathrow to San Sebastian. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 August 2026.

Mon 14/920:50 -
1 stop10h 30m
Sat 19/917:55 -
1 stop16h 15m
Deal found 6/8£144
Mon 28/920:50 -
1 stop10h 30m
Tue 29/917:55 -
1 stop16h 15m
Deal found 4/8£148
Tue 8/920:50 -
1 stop10h 30m
Wed 16/917:55 -
1 stop16h 15m
Deal found 6/8£154
Thu 24/920:50 -
1 stop10h 30m
Mon 28/917:55 -
1 stop16h 15m
Deal found 5/8£160
Mon 7/920:50 -
1 stop10h 30m
Wed 9/917:55 -
1 stop16h 15m
Deal found 2/8£160
Fri 25/920:50 -
1 stop10h 30m
Mon 28/921:30 -
1 stop11h 55m
Deal found 3/8£163
Sun 6/1209:55 -
1 stop6h 40m
Sat 12/1221:10 -
2 stops21h 50m
Deal found 6/8£163
Sat 10/1020:50 -
1 stop10h 30m
Wed 14/1013:40 -
1 stop5h 35m
Deal found 2/8£169
Thu 24/920:50 -
1 stop10h 30m
Mon 28/921:30 -
1 stop11h 55m
Deal found 5/8£169
Sat 17/1020:00 -
1 stop11h 40m
Tue 20/1021:30 -
1 stop11h 55m
Deal found 2/8£171
Fri 11/920:50 -
1 stop10h 30m
Mon 14/917:55 -
2 stops21h 50m
Deal found 4/8£172
Mon 14/920:50 -
1 stop10h 30m
Sat 19/910:50 -
2 stops10h 15m
Deal found 6/8£172

Find flight deals from Heathrow to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Sebastian (EAS). 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 August 2026.

Round-trip from

£134

One-way from

£51

Popular in

May

Cheapest in

November

Average price

£293
Iberia
  • Iberia
  • 12/11-18/11
  • 2 total stops
  • 11h 15m total
  • London to San Sebastian
Search Deals
Vueling
  • Vueling
  • 10/10
  • 1 total stop
  • 10h 30m total
  • London to San Sebastian
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Mon 14/9

20:50-08:20

1 stop10h 30m

San Sebastián

Sat 19/9

17:55-09:10

1 stop16h 15m

£144

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Tue 8/9

20:50-08:20

1 stop10h 30m

San Sebastián

Wed 16/9

17:55-09:10

1 stop16h 15m

£154

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Thu 24/9

20:50-08:20

1 stop10h 30m

San Sebastián

Mon 28/9

17:55-09:10

1 stop16h 15m

£160

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Mon 7/9

20:50-08:20

1 stop10h 30m

San Sebastián

Wed 9/9

17:55-09:10

1 stop16h 15m

£160
Fastest return journey

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Fri 27/11

20:50-13:35

1 stop15h 45m

San Sebastián

Thu 3/12

14:10-20:05

1 stop6h 55m

£172

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Sat 26/9

20:50-08:20

1 stop10h 30m

San Sebastián

Tue 29/9

08:55-20:05

1 stop12h 10m

£178

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Fri 13/11

20:50-13:35

1 stop15h 45m

San Sebastián

Sun 15/11

18:10-09:10

1 stop16h 00m

£178

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Wed 19/8

20:50-08:30

1 stop10h 40m

San Sebastián

Wed 26/8

17:55-09:10

1 stop16h 15m

£179

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Sun 18/10

20:50-08:20

1 stop10h 30m

San Sebastián

Sat 24/10

17:55-10:10

1 stop17h 15m

£180

LondonSan Sebastian

LHR London Heathrow - EAS San Sebastián

LHREAS

London Heathrow

Fri 30/10

20:50-13:35

1 stop15h 45m

San Sebastián

Sun 1/11

18:10-09:10

1 stop16h 00m

£186

Flights are sorted by cheapest return flights first.

Deals found on 6/8

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian 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 Sebastian

What’s the top stopover airport for flights from London Heathrow Airport to San Sebastian?

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

Madrid (MAD) – chosen by Cheapflights users on 91% of one-stop itineraries from London Heathrow Airport to San Sebastian on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to San Sebastian?

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

Barcelona (BCN) is the most affordable one-stop option, with an average return flight price of £193.

What’s the fastest stopover option from London Heathrow Airport to San Sebastian?

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

Flights via Barcelona (BCN) have the shortest average one-way travel time for one-stop routes: 6h 25m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to San Sebastian?

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

Flights via Madrid (MAD) offer the fastest connection on this route, with an average stopover time of 2h 03m.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. 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 Sebastian. Reviews last updated 6 August 2026.
See what other customers who have flown with Iberia from London Heathrow Airport to San Sebastian have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Iberia
7.0
Good
3,264 reviews
Check prices

Food

6.3

Boarding

7.1

Overall

7.0

Crew

7.7

Comfort

6.7

Entertainment

6.6

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

LHR - DFW

Transparency. There was a gate change that was not disclosed on my ticket that made the connection to Vegas hurried. Also, it’s a given that for international travel, luggage pickup is required at first port of entry in the US, but please don’t have international employees set the expectation that luggage does not have to be picked up until the final destination. If I followed her instructions, my luggage would have been sitting at my connection now.
Iberia
7.0
Good
3,264 reviews
Iberia
7.0
Good
3,264 reviews
Check prices

Food

6.3

Boarding

7.1

Overall

7.0

Crew

7.7

Comfort

6.7

Entertainment

6.6

Reviews

1 / 20
6.0
Good

Anonymous,Dec 2025

LHR - DFW

Transparency. There was a gate change that was not disclosed on my ticket that made the connection to Vegas hurried. Also, it’s a given that for international travel, luggage pickup is required at first port of entry in the US, but please don’t have international employees set the expectation that luggage does not have to be picked up until the final destination. If I followed her instructions, my luggage would have been sitting at my connection now.

Related info for your journey

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

    Located just 9.7 mi from the city center, San Sebastián is the airport most travelers will use when flying to San Sebastian from London Heathrow. Booking flights from London Heathrow to San Sebastián (EAS) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 1 airline.

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

    Airlines like Vueling fly from London Heathrow Airport to San Sebastian in about 10h 30m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and San Sebastian is about 564 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to San Sebastian round-trip?

    Flying on Iberia is currently your cheapest option to San Sebastian, with prices starting at £199. You may be able to fly from London Heathrow Airport to San Sebastian for 29% less than the average price by searching for this airline.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Heathrow to San Sebastian

Discover the top airline that operate flights from Heathrow to San Sebastian. 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 August 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest£199Average£345FlexibilityNo cancel feeOn-time77%
Search Iberia 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 Sebastian?

Cheapflights helps you search for flights from Heathrow to San Sebastian via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Heathrow to San Sebastian by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to San Sebastian with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to San Sebastian flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to San Sebastian become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to San Sebastian on Cheapflights with our Price Alert feature and get notified when better prices are available.

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