Cheap flights from Phoenix to Boston

One-way fares from $111 · PHX → BOS · prices found by travellers in the last 48 hours

Compare all dates Boston → Phoenix
Cheapest fare
$111

Frontier Airlines · Mon, Dec 14

Cheapest month
December

from $111

Direct flights
Not recently

Usually 1+ stop

Quickest trip
6h 58m

3,690 km

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Cheapest month to fly from Phoenix to Boston

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $156
  2. December 2026 Cheapest $111

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

Frontier Airlines
Depart17:54 Mon, Dec 14PHX → BOS 9h 29m · 2 stops
$111one way, per person
View deal
See every date in December 2026 →

Plan the rest of your trip to Boston

Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in BostonTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in BostonPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in BostonCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Phoenix to Boston

Phoenix (PHX) and Boston (BOS) are about 3,690 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 6h 58m. Over the next few months, one-way fares start from $111, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Phoenix to Boston?

The cheapest one-way fare we've seen recently is $111 with Frontier Airlines, departing Monday, December 14, 2026. Over the coming months, the lowest fare in each month ranges from $111 to $156.

What is the cheapest month to fly from Phoenix to Boston?

December 2026 currently has the lowest fares, from $111 one way.

Are there direct flights from Phoenix to Boston?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Phoenix to Boston?

The quickest journey we've seen takes about 6h 58m. Phoenix and Boston are around 3,690 km apart.

Which airlines fly from Phoenix to Boston?

Recent fares on this route were with Alaska Airlines and Frontier Airlines.

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