Flying from Boston Logan International Airport (BOS) to San Francisco International Airport (SFO) connects two iconic U.S. cities on opposite coasts. Whether you’re heading to the Bay Area for business in Silicon Valley, a wine country escape, or sightseeing, there are plenty of ways to score cheap flights from Boston to San Francisco without sacrificing comfort.

Best and Most Affordable Airlines from BOS to SFO

Several major airlines operate nonstop flights between BOS and SFO, giving travelers flexibility in price, timing, and service quality.

Top Airlines for This Route:

1. JetBlue Airways – Comfortable seating, free entertainment, and often very competitive fares.

2. United Airlines – Extensive West Coast network and solid cross-country schedule.

3. Delta Air Lines – Multiple daily flights with a strong reputation for reliability.

4. Alaska Airlines – Excellent service and competitive pricing, especially for connections within California.

5. American Airlines – Good cross-country coverage with frequent discounts.

If low cost is the priority, JetBlue and Alaska often have the most affordable nonstop options.

Places to Visit in San Francisco

Once you land at SFO, you’re just a short drive or train ride from San Francisco’s world-famous attractions:

• Golden Gate Bridge – Walk or bike across this iconic structure with stunning views.

• Fisherman’s Wharf & Pier 39 – Home to sea lions, seafood stalls, and family-friendly attractions.

• Alcatraz Island – Take the ferry to explore the legendary former prison.

• Chinatown – The oldest and one of the most vibrant in North America.

• Golden Gate Park – A massive green space with gardens, museums, and trails.

Best Time to Book Flights from Boston to San Francisco

Airfares on this route can vary greatly depending on the season and booking window.

• Booking 1–3 months ahead typically offers the lowest prices.

• Midweek flights, especially on Tuesdays and Wednesdays, tend to be cheaper.

• January to March and September to November often have better deals compared to peak summer travel.

• Avoid booking last minute unless you’re flexible with travel times and connections.

Money-Saving Tips for BOS to SFO Flights

• Use flight search engines with fare alerts to catch sudden price drops.

• Be open to red-eye flights — they’re often the most affordable on this route.

• Consider flying into nearby airports like Oakland (OAK) or San Jose (SJC) if you find a significantly cheaper fare.

• Redeem loyalty points or credit card rewards when available.

• Compare one-way tickets to round-trip options — sometimes splitting carriers saves money.

Boston Logan International Airport (BOS) – Quick Facts

• Location: 3 miles from downtown Boston.

• Hub for: JetBlue Airways.

• Transportation: MBTA Blue Line, Silver Line buses, taxis, and rideshares.

San Francisco International Airport (SFO) – Quick Facts

• Location: 13 miles south of downtown San Francisco.

• Hub for: United Airlines, Alaska Airlines.

• Transportation: BART trains, buses, taxis, and rideshares.

Final Thoughts

With plenty of nonstop options and frequent airline sales, finding cheap flights from Boston to San Francisco is all about timing, flexibility, and knowing where to look. Once you arrive, you’ll have endless opportunities to explore — from historic neighborhoods and cultural landmarks to scenic coastal drives and wine country getaways.