Your next trip, last seen at €73
Below averageFrontier Airlines · 1 stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €73, departing 21 Nov 2026 (Last checked: 27 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 30Check live prices for this route
- Airlines seen
- Southwest Airlines, Alaska Airlines, Allegiant Air, American Airlines, Frontier Airlines, United Airlines
- Reported fastest flight
- 2h
- Non-stop
- Yes
About this route
Explore the fares we observed from Boise to Phoenix. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,186 km
- Reported fastest flight
- 2h
- Alternative airports
- AZA, SCF
Route-level information; individual journeys vary.
Published schedules report non-stop service with Southwest Airlines. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Alaska Airlines | 27 / 66 | |
| Allegiant Air | 15 / 66 | |
| American Airlines | 4 / 66 | |
| Southwest Airlines | 3 / 66 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Boise Air Terminal/Gowen Field (BOI) → Boise, city gazetteer reference point (43.6150, -116.2023): ≈ 6 km.
- Phoenix Sky Harbor International Airport (PHX) → Phoenix, city gazetteer reference point (33.4484, -112.0740): ≈ 6 km.
- Mesa Gateway Airport (AZA) → Phoenix, city gazetteer reference point (33.4484, -112.0740): ≈ 42 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by day of the week
Cheapest day of the week from Boise to Phoenix: Saturday, from €73 (checked 27 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €91 | 5 |
| Tuesday | €80 | 4 |
| Wednesday | €103 | 4 |
| Thursday | €98 | 4 |
| Friday | €111 | 4 |
| Saturday | €73 | 4 |
| Sunday | €108 | 5 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Boise to Phoenix by days until departure (8 to 30 days): €73 (checked 27 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €150 | 5 |
| 8 to 30 days | €73 | 23 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Boise to Phoenix: Allegiant Air, from €38 (checked 18 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €38Dec 14, 2026 | 15 |
| Frontier Airlines | €73Nov 21, 2026 | 13 |
| Alaska Airlines | €89Dec 1, 2026 | 38 |
| Southwest Airlines | €115Feb 5, 2027 | 6 |
| United Airlines | €124Feb 5, 2027 | 3 |
| American Airlines | €160Nov 8, 2026 | 5 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Boise to Phoenix?
The lowest fare Routavio has observed is €73, found on 27 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Boise to Phoenix?
In our observations November 2026 is the cheapest month so far, at €73.
Are there direct flights from Boise to Phoenix?
Yes. Published schedules report non-stop flights on this route with Southwest Airlines.
Which airlines fly from Boise to Phoenix?
Routavio has seen these carriers on the route: Southwest Airlines, Alaska Airlines, Allegiant Air, American Airlines, Frontier Airlines, United Airlines.
How long does the flight from Boise to Phoenix take?
Across the 61 fares Routavio observed, the average journey time is 4h 50m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Boise to Phoenix fares were non-stop?
39 of the 61 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Boise to Phoenix?
For Boise to Phoenix, examples of observed one-way non-stop offers checked within the last 14 days: Alaska Airlines (27), Allegiant Air (15), American Airlines (4). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Boise to Phoenix?
Cheapest day of the week from Boise to Phoenix: Saturday, from €73 (checked 27 Oct 2026).
Which airline has the lowest fare from Boise to Phoenix?
Cheapest airline from Boise to Phoenix: Allegiant Air, from €38 (checked 18 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
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Recently observed fares. Prices may change.
Last checked: 27 Oct 2026