Where Is Hot in September from Boise? 2026
11 warm destinations have direct flights from Boise in September. Santa Ana has the best overall weather. Santa Ana has the lowest fares from €129.
|
Santa Ana
United States
|
25°C | 1h 40m | €129 | €62/night | 112 |
|
Sacramento
United States
|
25°C | 1h 20m | €198 | €70/night | 114 |
|
San Jose
United States
|
25°C | 1h 20m | €264 | €81/night | 135 |
|
Salt Lake City
United States
|
24°C | €470 | €66/night | 138 | |
|
Portland
United States
|
22°C | 1h | €300 | €62/night | 138 |
|
Seattle
United States
|
20°C | 1h 20m | €190 | €72/night | 138 |
|
San Francisco
United States
|
19°C | 1h 20m | €180 | €90/night | 118 |
|
Atlanta
United States
|
28°C | 4h | €732 | €54/night | 138 |
|
Las Vegas
United States
|
31°C | 1h 20m | €188 | €86/night | 118 |
|
Dallas
United States
|
32°C | 2h 40m | €344 | €52/night | 119 |
|
Phoenix
United States
|
33°C | 1h 40m | €230 | €71/night | 121 |
Temperatures are historical averages for September. Prices updated 9 Sep 2026.
Warmest destinations from Boise in September
The warmest places to fly to directly from Boise in September, ranked by average daytime temperature. All destinations average 18°C or above and are reachable on a direct flight.
Santa Ana
25°C avg daytime
From €129 return
1h 40m direct
112 trips available
Sacramento
25°C avg daytime
From €198 return
1h 20m direct
114 trips available
San Jose
25°C avg daytime
From €264 return
1h 20m direct
135 trips available
Salt Lake City
24°C avg daytime
From €470 return
direct
138 trips available
Portland
22°C avg daytime
From €300 return
1h direct
138 trips available
Frequently Asked Questions
Where is hot in September from Boise?
There are 11 warm destinations reachable by direct flight from Boise in September. Santa Ana is among the top picks, with average daytime temperatures around 25°C.
Which is the warmest place to fly to from Boise in September?
Phoenix is typically the warmest destination reachable by direct flight from Boise in September, averaging around 33°C during the day.
What is the cheapest warm holiday from Boise in September?
Santa Ana is among the cheapest warm destinations from Boise in September, with return fares from around €129.
How does FairFareFinder calculate the best destinations for September?
FairFareFinder uses live flight and hotel price data combined with historical weather averages to rank destinations. Temperatures shown for dates beyond 14 days ahead are historical averages for September, not live forecasts. Prices are updated approximately every 6 hours.
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