Boston (BOS) to Phoenix (PHX): 2,295 miles (3,693 km) great-circle, about 5h 05m nonstop by our estimate. Cheapest fare observed: $272 round-trip on JetBlue, with 1 stop, departing May 12, 2026.
$272 round-trip, JetBlue B6919, departing 2026-05-12 at 06:00, returning 2026-05-14. The recorded itinerary left on a Tuesday, returning on a Thursday 2 nights later; the fare was observed 17 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $272, it ranked 9th of the 30 round-trip fares we recorded from BOS (median $623). That is 11.9 cents per great-circle mile (round-trip price over one-way distance), below the BOS median of 19.1 cents across 30 round-trip routes.
Routes from BOS of similar length: Las Vegas (2,375 mi) at $280 and Los Angeles (2,605 mi) at $281.
BOS to PHX is the only one of 30 BOS routes where JetBlue priced cheapest. It is the 18th longest of the 30 routes we track from BOS.
Of 12 departure airports with a fare to Phoenix, Boston (BOS) ranked 9th at $272. Lowest: $48 from Denver (DEN); highest: $409 from San Jose (SJC); 8 nonstop. Cheapest-fare airlines (routes): Frontier (8), Alaska Airlines (1), JetBlue (1), Southwest (1) and Volaris (1).
The reverse, Phoenix (PHX) to Boston (BOS), was $296 round-trip on Frontier, 1 stop, departing May 11, 2026. Phoenix to Boston flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/Phoenix; flight time is our estimate.