Flights from London to Sun Valley from £ 1,057*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from London (LHR) to Sun Valley (SUN)

May 2026
From£ 1,080*
Viewed: 12 hours ago
RoundTrip|Economy
Jun 2026
From£ 1,057*
Viewed: 12 hours ago
RoundTrip|Economy
Jul 2026
From£ 1,066*
Viewed: 12 hours ago
RoundTrip|Economy
cmp-daily-histogram-bars-legend-min-price-aria-label £ 1.1K
cmp-daily-histogram-bars-legend-max-price-aria-label £ 1.4K
Displaying fares for May-2026
  • 08

    Fr

    MAY

  • 09

    Sa

  • 10

    Su

  • 11

    Mo

  • 12

    Tu

  • 13

    We

  • 14

    Th

  • 15

    Fr

  • 16

    Sa

  • 17

    Su

  • 18

    Mo

  • 19

    Tu

  • 20

    We

  • 21

    Th

  • 22

    Fr

  • 23

    Sa

  • 24

    Su

  • 25

    Mo

  • 26

    Tu

  • 27

    We

  • 28

    Th

  • 29

    Fr

  • 30

    Sa

  • 31

    Su

  • 01

    Mo

    JUN

  • 02

    Tu

  • 03

    We

  • 04

    Th

  • 05

    Fr

  • 06

    Sa

  • 07

    Su

    • Range£ 1,057-£ 1,386

    *Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.

    More United deals on London (LHR) to Sun Valley (SUN) flights

    £
    keyboard_arrow_down
    More United deals on London (LHR) to Sun Valley (SUN) flights
    From
    To
    Fare Type
    Dates
    Price
    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		03/06/2026 - 17/06/2026

    from

    £ 1,057

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		03/06/2026 - 10/06/2026

    from

    £ 1,057

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		01/07/2026 - 15/07/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		13/07/2026 - 20/07/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		08/07/2026 - 22/07/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		08/06/2026 - 22/06/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		09/06/2026 - 23/06/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    London (LHR)Sun Valley (SUN)Roundtrip
    |
    Economy    		24/06/2026 - 08/07/2026

    from

    £ 1,066

    Viewed: 12 hours ago

    *Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.

    Explore United Airlines's Top-Pick Destinations

    Explore more United flights