Cheapest return flights from London (LHR) to Keflavik (KEF)

Cheapest month: December 2026, from $ 176. Book in one tap, or open a month for every date.

All destinations from London (LHR)

One-wayReturn

  • October 2026

    31 Oct – 7 Nov 7 nights
    $ 185 return
    Direct British Airways
    Price seen 9 Oct
    October dates

  • November 2026

    13–20 Nov 7 nights
    $ 185 return
    Direct British Airways
    Price seen 9 Oct
    November dates

  • December 2026

    1–8 Dec 7 nights
    $ 176 return Cheapest month
    Direct Icelandair
    Price seen 9 Oct
    December dates

  • March 2027

    2–9 Mar 2027 7 nights
    $ 232 return
    Scandinavian Airlines
    Price seen 9 Oct
    March dates

  • September 2027

    26 Sep – 2 Oct 2027 6 nights
    $ 278 return
    Austrian Airlines
    Price seen 9 Oct
    September dates
Powered by

Deals for one-way flights from London to Keflavik.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik International Airport

Updated Oct 9, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Feel free to contact us with any feedback or request another flight research.