Cheap flights from Boston to Phoenix from $519 BOS → PHX
Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX)
The cheapest return found recently is $519 with Frontier Airlines, 21 Nov – 30 Nov, found 2 days ago.
- Cheapest return found recently
- $519, 21 Nov to 30 Nov
- Usual return price
- $468 to $572
- Cheapest month to fly
- December 2026, return fares from $324 found in the last 7 days
Return
The cheapest return fare on each of 4 departure dates is usually $468 to $572.
Cheapest return found recently
$519
21 Nov – 30 Nov · Frontier Airlines
Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX)
Leaves 11:06 a.m. · Return leaves 12:30 p.m. · 80 h 25 min of travel, both ways together
out 1 stop, back 2 stops
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$519 21 Nov – 30 Novfound 2 days agoSee prices for these dates
$324 17 Dec – 23 Decfound 7 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $285 to $435.
At $519, the cheapest return found recently is above that range.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 14 Nov to 26 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 9-night return fares leaving within 3 days of 21 Nov to compare.
Every date we hold
7 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 14 Nov – 21 Nov | $516 | Alaska Airlines | Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Nov – 30 Nov | $519 | Frontier Airlines | Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 2 stops | found 2 days ago | See prices for these dates |
| 17 Dec – 23 Dec | $324 | Frontier Airlines | Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX) | out 2 stops, back 2 stops | found 7 days ago | See prices for these dates |
| 26 Dec – 2 Jan 2027 | $729 | Southwest Airlines | Logan International Airport (BOS) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $324.
Airlines on the cheapest dates: Frontier Airlines, Alaska Airlines, Southwest Airlines.
Premium cabin fares from Boston to Phoenix
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 21 Nov – 30 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Boston to Phoenix?
Return
Fares 30 to 59 days before departure were typically 52% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $653 | $516 | +109% | 7 |
| 14–29 days | $343 | $343 | +10% | 8 |
| 30–59 days | $313 | $285 | Cheapest seen | 25 |
| 60–89 days | $409 | $325 | +31% | 25 |
| 90–179 days | $449 | $449 | +44% | 8 |
| 180+ days | $386 | $386 | +23% | 7 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Hartford → Phoenix
142 km from Boston
$199
13 Jul 2027 · BDL → PHX · 1 stop
found 4 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 21 Nov – 30 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Boston to Phoenix?
The cheapest return found recently is $519 with Frontier Airlines, 21 Nov to 30 Nov, found 2 days ago. The cheapest return we hold, of any age, is $324 with Frontier Airlines, 17 Dec to 23 Dec, found 7 days ago. The cheapest return fare on each of 4 departure dates is usually $468 to $572.
What is the cheapest month to fly from Boston to Phoenix?
December 2026 is the cheapest month for a return, from $324, 17 Dec to 23 Dec, found 7 days ago.
How far ahead should I book a flight from Boston to Phoenix?
In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 52% lower than 0 to 6 days before departure.
Which airlines have the cheapest flights from Boston to Phoenix?
Between 14 Nov and 26 Dec, Frontier Airlines has the cheapest return on 2 of the 4 departure dates we hold, Alaska Airlines on 1 and Southwest Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work