AirHint found the following cheapest return flights from Phoenix (PHX) to Kalispell (FCA) in August 2025 (see full year).

Return flights

09 Aug - 15 Aug	Allegiant Air	direct
04 Aug - 08 Aug	Allegiant Air	direct
04 Aug - 15 Aug	Allegiant Air	direct
06 Aug - 09 Aug	Allegiant Air	direct
04 Aug - 09 Aug	Allegiant Air	direct
08 Aug - 15 Aug	Allegiant Air	direct
06 Aug - 08 Aug	Allegiant Air	direct
06 Aug - 15 Aug	Allegiant Air	direct
09 Aug - 16 Aug	Allegiant Air	direct
04 Aug - 16 Aug	Allegiant Air	direct
28 Aug - 02 Sep	Delta

Also check the deals for one-way flights from Phoenix to Kalispell in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Phoenix to Kalispell in August from $68

Return flights