Are there nonstop flights from Idaho Falls (IDA) to London (LHR)?

No. The fastest connection is via Salt Lake City, about 10h 32m of total flying time.

What is the fastest connection from Idaho Falls (IDA) to London (LHR)?

via Salt Lake City ≈ 10h 32m, via Denver ≈ 10h 41m, via Chicago ≈ 10h 47m (estimated flying time, excluding layovers).

from 37,000 JAL miles (economy, one way, based on the published award charts).

Idaho Falls Regional Airport (IDA) to London Heathrow Airport (LHR)・7,577 km

No nonstop flights. The fastest connection is via Salt Lake City (SLC), about 10h 32m of flying time (layover not included).

With milesJAL 37,000 miles+ (via SEA)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.