−62%Verified fare
PHX → San Francisco
United States · Frontier · Nonstop
$38 round trip
Usually ~$100 · Feb 2027
Feb 13 → Feb 20 · hotels from ~$178/nightSee it on Google Flights →
American, Delta and JetBlue fly nonstop from Phoenix to Boston. The flight takes about 4h 55m.
| From | Phoenix Sky Harbor (PHX) |
|---|---|
| To | Boston Logan (BOS) |
| Nonstop airlines | American Delta JetBlue (seasonal) |
| Flight time | About 4h 55m |
| Cheapest month | February (median about $268 round trip) |
| Most expensive | July and September |
| Typical round trip | $312 to $516 |
| Best time to book | About 23 weeks ahead |
February is usually the cheapest month to fly from Phoenix to Boston, with a median round trip around $268. July and September cost the most, around $473 and $442. Most round trips have cost $312 to $516.
Booking about 23 weeks before departure has saved the most on this route, about 31% compared with booking in the last two weeks.
Those are typical prices. Our daily scan looks for fares well below them: when one shows up from PHX, it appears at the top of this page and goes out by email.
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American; Delta; JetBlue (seasonal). Schedules change, so check before booking.
About 4h 55m.
February is usually the cheapest month to fly from Phoenix to Boston, with a median round trip around $268. July and September cost the most, around $473 and $442. Most round trips have cost $312 to $516.
Booking about 23 weeks before departure has saved the most on this route, about 31% compared with booking in the last two weeks.
Be flexible on dates, compare the nearby airports listed above, and watch for fare drops. Our free newsletter checks fares from PHX every morning and only sends fares at least 20% below the typical price for that route and dates.
Prices are round-trip medians over the past 12 months from KAYAK route data, checked October 2026. Nonstop airlines from Phoenix Sky Harbor and airline schedules as of October 2026. Fares and schedules change, so confirm before you book.