Boston to San Francisco

1 ways to travelfastest 7h 20mfly from €118
Photo: Joshua Sortino / Unsplash

How the cheapest fare moved

Jul 23: €128 €128 Jul 18 Jul 23 low €128 · high €227

Departure-day prices · May 2026 Boston → San Francisco

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Return-day prices · May 2026 San Francisco → Boston

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Best time to visit San Francisco — climate

Jan: ~15°C daytime, 2 rainy days 15° JanFeb: ~15°C daytime, 11 rainy days 15° FebMar: ~15°C daytime, 12 rainy days 15° MarApr: ~17°C daytime, 3 rainy days 17° AprMay: ~19°C daytime, 1 rainy days 19° MayJun: ~18°C daytime, 0 rainy days 18° JunJul: ~17°C daytime, 0 rainy days 17° JulAug: ~20°C daytime, 0 rainy days 20° AugSep: ~21°C daytime, 2 rainy days 21° SepOct: ~20°C daytime, 4 rainy days 20° OctNov: ~17°C daytime, 9 rainy days 17° NovDec: ~13°C daytime, 10 rainy days 13° Dec

Best value: Oct — fares from €118 and ~20°C daytime.

Flights from Boston to San Francisco start around €118 (typically 1 stop). Range seen recently: €118–146, based on 6 fares found by travellers.

Fly (from €118)
7h 20mduration
€118–146recent fares
Book
Cheapest cached fares Boston → San Francisco; typically 1 stop (e.g. B6). · Based on 6 fares found by travellers in the last 48h

Cheapest round trips to San Francisco

Fares found by travellers in the last 48 hours — refreshed daily.

Sep 4 – Sep 14 jetBlue · 1 stop · 7h 59m €227 Book
Sep 10 – Sep 17 Frontier Airlines · 1 stop · 8h 26m €274 Book
Aug 12 – Aug 16 jetBlue · Direct · 6h 30m €318 Book
Oct 24 – Nov 20 Southwest Airlines · 1 stop · 7h 10m €353 Book
Jul 31 – Aug 3 Alaska Airlines · 1 stop · 8h 13m €358 Book
Apr 11 – Apr 17 jetBlue · 1 stop · 8h 05m €375 Book
Aug 1 – Aug 5 United Airlines · Direct · 6h 27m €382 Book

Weather in San Francisco

Thu 🌤️ 20° 14° 💧1%
Fri 🌤️ 20° 13° 💧1%
Sat 🌤️ 21° 15° 💧0%
Sun 🌤️ 21° 15° 💧0%
Mon 🌤️ 22° 15° 💧0%
Tue ☁️ 22° 15° 💧0%
Wed ☁️ 20° 15° 💧0%

In May, San Francisco typically sees ~19°C daytime highs and 1 rainy days.

Good to know

Time difference-3h
Time in the air6h 27m

Things to do in San Francisco

Top-rated tours and tickets from €54 — book ahead for the popular ones.

Tours and tickets provided by Viator (a Tripadvisor company). Some links earn Stayonomy a commission.

About San Francisco

The centerpiece of the Bay Area, San Francisco is one of the most visited cities in the world, and with good reason. The cultural center of northern California, San Francisco is renowned for its mixture of scenic beauty and unique culture that makes it one of the most vibrant and desirable cities in the nation, if not the world. Sandwiched between the San Francisco Bay and the Pacific Ocean on a small square of land seven miles (11 km) on each side, San Francisco offers a wealth of treasures for the visitor, from the windswept and often foggy b…

Read the full San Francisco guide

Guide content from Wikivoyage contributors (CC BY-SA).

Round out the trip

Popular from Boston

Cheapest destinations travellers searched recently — refreshed daily.

Flight prices are real fares travellers found in the last 48 hours, refreshed daily — the booking site confirms the final price. Train, bus and ferry fares are shown on the operators' booking sites. Weather data by Open-Meteo; exchange rates: ECB reference. Data updated 2026-07-23. Some links earn Stayonomy a commission at no cost to you.