Cheapest return flights from Boise to Phoenix in September from $102
AirHint found the following cheapest return flights from Boise (BOI) to Phoenix (PHX)
in September 2025 (see full year ).
Return flights
19 Sep
- 06 Oct
Allegiant Air
$ 102
direct
29 Sep
- 06 Oct
Allegiant Air
$ 102
direct
05 Sep
- 07 Sep
Southwest Airlines
$ 105
direct
19 Sep
- 22 Sep
Allegiant Air
$ 105
direct
19 Sep
- 03 Oct
Allegiant Air
$ 105
direct
29 Sep
- 03 Oct
Allegiant Air
$ 105
direct
19 Sep
- 26 Sep
Allegiant Air
$ 109
direct
22 Sep
- 23 Sep
Allegiant Air
$ 110
direct
15 Sep
- 19 Sep
Allegiant Air
$ 117
direct
15 Sep
- 06 Oct
Allegiant Air
$ 117
direct
15 Sep
- 22 Sep
Allegiant Air
$ 120
direct
15 Sep
- 03 Oct
Allegiant Air
$ 120
direct
15 Sep
- 26 Sep
Allegiant Air
$ 124
direct
19 Sep
- 29 Sep
Allegiant Air
$ 126
direct
19 Sep
- 10 Oct
Allegiant Air
$ 133
direct
29 Sep
- 10 Oct
Allegiant Air
$ 133
direct
15 Sep
- 29 Sep
Allegiant Air
$ 141
direct
Also check the deals for one-way flights from Boise to Phoenix in September .
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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