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London to San Jose, Costa Rica flights in December 2026 from $1,030 LCY, LGW, LHR, LTN, SEN, STN → SJO

London City Airport (LCY), London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN), London Southend Airport (SEN), Stansted Airport (STN) → Juan Santamaria International Airport (SJO)

For departures in December 2026, the cheapest return found recently is $1,030 with SWISS, 4 Dec – 22 Dec, found 5 days ago.

Return

In December 2026, the cheapest return fare on each of 7 departure dates is usually $1,091 to $1,484. Across all 17 departure dates we hold on this route, it is usually $955 to $1,426. Of the 2 months with enough return fares to compare, December 2026 is usually the cheapest.

Cheapest return found recently

$1,030

4 Dec – 22 Dec · SWISS

London Gatwick Airport (LGW) → Juan Santamaria International Airport (SJO)

out 1 stop, back 1 stop

found 5 days ago

See prices for these datesCheck today's price

It is also the cheapest return we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
4 Dec – 22 Dec$1,030SWISSout 1 stop, back 1 stopfound 5 days agoSee prices for these dates
31 Dec – 27 Jan 2027$1,090KLMout 2 stops, back 1 stopfound 6 days agoSee prices for these dates
11 Dec – 9 Feb 2027$1,092United Airlinesout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
14 Dec – 17 Jan 2027$1,102American Airlinesout 1 stop, back 1 stopfound 6 days agoSee prices for these dates
26 Dec – 21 Jan 2027$1,282Air Canadaout 1 stop, back 1 stopfound 6 days agoSee prices for these dates

Every date we hold

7 departure dates

4 Dec – 22 Dec: $1,030, found 5 days ago10 Dec – 4 Jan 2027: $1,686, found 6 days ago11 Dec – 9 Feb 2027: $1,092, found 6 days ago14 Dec – 17 Jan 2027: $1,102, found 6 days ago26 Dec – 21 Jan 2027: $1,282, found 6 days ago28 Dec – 11 Jan 2027: $2,328, found 6 days ago31 Dec – 27 Jan 2027: $1,090, found 6 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
4 Dec – 22 Dec$1,030SWISSLondon Gatwick Airport (LGW) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 5 days agoSee prices for these dates
10 Dec – 4 Jan 2027$1,686AirDolomitiLondon City Airport (LCY) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
11 Dec – 9 Feb 2027$1,092United AirlinesLondon Heathrow Airport (LHR) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
14 Dec – 17 Jan 2027$1,102American AirlinesLondon Heathrow Airport (LHR) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
26 Dec – 21 Jan 2027$1,282Air CanadaLondon Heathrow Airport (LHR) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
28 Dec – 11 Jan 2027$2,328KLMLondon City Airport (LCY) → Juan Santamaria International Airport (SJO)out 1 stop, back 1 stopfound 6 days agoSee prices for these dates
31 Dec – 27 Jan 2027$1,090KLMLondon Heathrow Airport (LHR) → Juan Santamaria International Airport (SJO)out 2 stops, back 1 stopfound 6 days agoSee prices for these dates

Which month looks cheapest?

February 2027 is the cheapest month — from $648.

November 2026From $9991 departure date25 Nov – 4 Dec · found 6 days agoSee prices for these dates
December 2026From $1,0307 departure dates4 Dec – 22 Dec · found 5 days agoSee prices for these dates
January 2027From $1,3013 departure dates2 Jan 2027 – 22 Jan 2027 · found 3 days agoSee prices for these dates
February 2027From $648Cheapest seen1 departure date18 Feb 2027 – 28 Feb 2027 · found 5 days agoSee prices for these dates
March 2027From $7841 departure date9 Mar 2027 – 18 Mar 2027 · found 5 days agoSee prices for these dates
May 2027From $8902 departure dates15 May 2027 – 28 May 2027 · found 3 days agoSee prices for these dates
June 2027From $9551 departure date11 Jun 2027 – 14 Jun 2027 · found 6 days agoSee prices for these dates
July 2027From $1,4261 departure date3 Jul 2027 – 10 Jul 2027 · found 6 days agoSee prices for these dates

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work