What is the cheapest month to fly from Boise to Sun Valley?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Boise (BOI) to Sun Valley (SUN), with fares starting from $555.

What is the lowest current fare from BOI to SUN?

The lowest currently-listed fare from Boise (BOI) to Sun Valley (SUN) is $555 on 2026-05-31.

Is there a direct flight from Boise to Sun Valley?

There is currently no non-stop service from BOI to SUN. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Boise to Sun Valley

Cheapest current fares: $555 in May 2026 on connecting flights.

Last updated May 25, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Boise (BOI) to Sun Valley (SUN). Refreshed daily.

Boise (BOI) → Sun Valley (SUN)

May 2026 $555

Frequently asked questions

What is the cheapest month to fly from Boise to Sun Valley?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Boise (BOI) to Sun Valley (SUN), with fares starting from $555.
What is the lowest current fare from BOI to SUN?

The lowest currently-listed fare from Boise (BOI) to Sun Valley (SUN) is $555 on 2026-05-31.
Is there a direct flight from Boise to Sun Valley?

There is currently no non-stop service from BOI to SUN. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.