Are there nonstop flights from Adelaide (ADL) to Houston (IAH)?

No. The fastest connection is via Sydney, about 18h 39m of total flying time.

What is the fastest connection from Adelaide (ADL) to Houston (IAH)?

via Sydney ≈ 18h 39m, via Auckland ≈ 18h 52m, via San Francisco ≈ 19h 22m (estimated flying time, excluding layovers).

from 37,500 ANA miles, from 70,000 JAL miles (economy, one way, based on the published award charts).

Adelaide International Airport (ADL) to George Bush Intercontinental Airport (IAH)・14,991 km

No nonstop flights. The fastest connection is via Sydney (SYD), about 18h 39m of flying time (layover not included).

With milesANA 37,500 miles+ (via AKL)JAL 70,000 miles+ (via DXB)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

5 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.