Back Bay skyline across the Charles River from the Longfellow Bridge. Flights from San Francisco to Boston

Route guide

Cheap Flights from San Francisco to Boston

See partner fares from San Francisco to Boston Logan, with how to reach SFO by BART and how to ride from Logan into Boston on the free SL1 bus.

SFO to BOS · 2,697 mi · 6h 17m est.

SFO to BOS
2,697 miles
6h 17m nonstop (estimated)
6 airlines in our fare results

Photo: King of Hearts, CC BY-SA 4.0, via Wikimedia Commons

San Francisco to Boston flight insights

Average flight time

~6h 17m (estimated)

SFO → BOS

Cheapest cached price

$298

Checking live fares…

Prices shown may not be current. Last checked: Oct 22, 2026.

Planning a trip from San Francisco to Boston? The average flight time on this route is ~6h 17m (estimated). The lowest fare we recorded on this route recently was $298 (last checked Oct 22, 2026); today's live fare for your dates can differ.

San Francisco to Boston covers a straight-line distance of about 2,697 miles. Based on that distance, a nonstop flight would take approximately ~6h 17m (estimated). Actual flight time varies by airline, aircraft and routing.

San Francisco to Boston at a glance

SFO to BOS is about 2,697 miles in a straight line. The curved line is an illustration; the route your airline flies may differ.

Route Quick Facts

Quick facts for flights from San Francisco to Boston on Eazair
Origin	San Francisco (SFO)
Destination	Boston (BOS)
Average Flight Time	~6h 17m (estimated)
Current Lowest Fare	$298
Fares Last Checked	Oct 22, 2026
Distance	2,697 miles (SFO to BOS)
Time in Boston	3 hours ahead of San Francisco
Airlines in our fare results	6

Local time in Boston is 3 hours ahead of San Francisco. San Francisco is on Pacific Time, Boston on Eastern Time.

Flight deals from San Francisco to Boston

San Francisco International (SFO) to Boston Logan International (BOS) is the pairing behind this page. JetBlue, American, United, Delta, Southwest and Frontier have appeared in EazAir's fare checks for this route. At Logan, airline pages list JetBlue in Terminal C, American and Southwest in Terminal B, and Delta in Terminal A and Terminal E. Massport's own list could not be checked, so confirm your terminal with your airline. TF Green Airport is a separate airport.

To start at SFO by rail, ride BART to the SFO station in the International Terminal, then walk or take the AirTrain Red Line to Terminal 1, 2 or 3 for a domestic flight. BART says the International Terminal check-in counters are a short walk from the station's main entrance. Checkpoint, TSA PreCheck and CLEAR locations at SFO could not be confirmed for this guide, so check with your airline and the airport before leaving.

Arriving at Logan, the MBTA says Silver Line SL1 service from the airport is always free, and the bus stops at every terminal on its way to South Station for the Red Line and Commuter Rail. If you plan to ride other MBTA services, CharlieTickets and CharlieCards are sold at fare machines in the Logan terminals, and the MBTA says you can also tap a contactless card or phone.

EazAir's first 4 fare checks for SFO to BOS ran from 28 Sep to 9 Oct 2026, each looking for the lowest one-way economy fare for one adult, departing 30 days later. The highest result was less than one and a half times the lowest. JetBlue Main Base and Southwest Basic both include a carry-on plus a personal item. Search your own dates, and check the final price, bags and fare rules on the partner site before you pay.

Airports for San Francisco to Boston flights

Departure · San Francisco

San Francisco International (SFO)

Pacific Time

Other airports near San Francisco Bay Area: Oakland International (OAK), Norman Y. Mineta San Jose International (SJC)

Arrival · Boston

Logan International (BOS)

Eastern Time

About Boston

Areas to know in Boston

Back Bay
North End
Beacon Hill

Weather in Boston

Four distinct seasons: cold, snowy winters and warm, humid summers, with fall foliage drawing visitors through October.

San Francisco to Boston: airport and fare guide

Checked on 17 Oct 2026 against the airport, airline and transit pages listed under Sources. Airports and airlines change these details, so confirm them with your airline before you fly.

TF Green Airport is a separate airport. The MBTA says the Providence/Stoughton Commuter Rail line from South Station connects to it.

Oakland (OAK) and San Jose (SJC) are separate airports in the same region. Check that your ticket says SFO.

Leaving from San Francisco International (SFO)

By BART, ride to the SFO station in the International Terminal. BART says to walk, or take the AirTrain Red Line, to Terminal 1, 2 or 3 for domestic flights.
By Caltrain, change to BART at Millbrae, which BART says has a cross-platform connection to Caltrain.
There is no BART parking at the SFO station. BART says the closest station parking is at Millbrae.
Checkpoint, TSA PreCheck and CLEAR locations could not be confirmed for this guide. Check your airline and the airport before you leave.

Arriving at Boston Logan International (BOS)

Airline	Logan terminal
American	Terminal B, gates B4 to B22.
Delta	Terminal A and Terminal E for domestic flights. Check the Fly Delta app or My Trips for yours.
JetBlue	Terminal C for domestic flights and international departures. International arrivals use Terminal E.
Southwest	Terminal B.
Other airlines	Check your boarding pass or airline app.

Taken from each airline's own page on 17 Oct 2026, as Massport's airline list could not be checked. Terminals can change, so confirm yours with your airline.

The MBTA says the Silver Line SL1 bus and the free Massport Shuttle stop at every Logan terminal.
Delta runs a shuttle bus between Terminal A, near gates A13 to A22, and Terminal E, normally at gate E13, from 4:30 a.m. to 10:30 p.m. daily.
JetBlue lists Terminal C for its domestic flights and international departures, and Terminal E for international arrivals.

Getting from BOS	Where to board	Where it goes
MBTA Silver Line SL1	Stops at every Logan terminal. The MBTA says service from the airport is always free.	South Station, for the Red Line and Commuter Rail.
Massport Shuttle and MBTA Blue Line	The free Massport Shuttle picks up at every terminal and runs to Airport station. A fare applies on the Blue Line.	State and Government Center. Change at State for the Orange Line or at Government Center for the Green Line.
MBTA Silver Line SL3	Airport station, reached on the free Massport Shuttle.	Chelsea, with Commuter Rail and bus connections at Chelsea station.
MBTA ferry	Logan Airport Ferry Terminal. Buy tickets at fare machines, in the mTicket app, or on board.	Long Wharf, Lovejoy Wharf (North Station), Hingham and Hull, with more service in summer.

What the lowest fares include

Fare	Carry-on	Checked bag	Seat	Changes
Delta Main Basic	Delta says every passenger can bring one carry-on and one personal item free.	Delta charges for checked bags on domestic flights unless you qualify for a waiver, such as Medallion status or an eligible Delta SkyMiles American Express card.	Assigned after check-in. You may be able to buy a seat ahead of time for a fee.	Refunds are not allowed after the 24-hour risk-free cancellation window. Delta says a change or cancellation may be possible for a fee, with any value left as an eCredit.
American Basic Economy	Included, plus a personal item.	Not included, except for some AAdvantage status members and eligible cardmembers.	A free seat is assigned at check-in, or you can pay to choose one.	Generally not allowed. American describes a 24-hour window and some credit options on its Basic Economy page.
United Basic Economy	Not included on domestic flights. One personal item only, unless you are a MileagePlus Premier member, travel with one, or hold a qualifying MileagePlus card.	Not included; check United's bag fee calculator.	Assigned by United before boarding.	Changes may not be allowed. Refund if cancelled within 24 hours of booking, under United's 24-hour policy; after that, partial travel credit.
Southwest Basic	Southwest's policy allows one carry-on and one personal item.	Checked bag fees apply to Basic fares.	A free Standard seat is assigned at check-in. Preferred and Extra Legroom seats cost extra.	Only by upgrading to a Choice fare or higher. Cancelling at least 10 minutes before departure gives a flight credit, which for Basic expires 6 months from booking.
JetBlue Main Base (bookings made after 29 Jul 2026)	Included, plus a personal item.	Not included.	Costs extra.	Change fee plus any fare difference. Cancelling gives travel credit minus a fee.
Frontier, without a bundle	Not included. One personal item only.	Not included. Prices vary by travel date and when you buy.	Costs extra, or a seat is assigned after check-in.	Not covered here. Check Frontier's rules before you book.

Based on the airlines' own pages, checked on 17 Oct 2026. Fees are left out because they change often. Check the final price, bags and fare rules on the partner site before you pay.

How EazAir measured fares on this route

EazAir's first 4 fare checks from San Francisco to Boston ran from 28 Sep to 9 Oct 2026. For the return direction, Boston to San Francisco, EazAir's first 20 checks ran from 11 Sep to 14 Oct 2026. Each check asked partner travel sites for the lowest one-way economy fare for one adult, departing 30 days after the check. Results can include connecting flights. The highest result was less than one and a half times the lowest. With only 4 checks, this cannot show a pattern. Search your own dates for current prices.

Sources

BART: San Francisco International Airport (SFO) station (no date shown, accessed 17 Oct 2026)
BART: Getting to SFO (no date shown, accessed 17 Oct 2026)
BART: Millbrae station (no date shown, accessed 17 Oct 2026)
MBTA: Logan Airport (no date shown, accessed 17 Oct 2026)
JetBlue: Boston airport information (no date shown, accessed 17 Oct 2026)
Delta: Boston airport update (no date shown, accessed 17 Oct 2026)
American: Boston airport information (no date shown, accessed 17 Oct 2026)
Southwest: Airport information, Boston Logan (no date shown, accessed 17 Oct 2026)
Delta: Delta Main Basic (no date shown, accessed 17 Oct 2026)
Delta: Fares and discounts (no date shown, accessed 17 Oct 2026)
Delta: Carry-on baggage (no date shown, accessed 17 Oct 2026)
Delta: Bags (no date shown, accessed 17 Oct 2026)
American Airlines: Basic Economy (no date shown, accessed 17 Oct 2026)
United: Basic Economy FAQ (no date shown, accessed 17 Oct 2026)
Southwest: Fare information (no date shown, accessed 17 Oct 2026)
Southwest: Assigned seating (no date shown, accessed 17 Oct 2026)
Southwest: Carry-on baggage policy (no date shown, accessed 17 Oct 2026)
Southwest: Fare types and benefits (no date shown, accessed 17 Oct 2026)
JetBlue: Fare options (no date shown, accessed 17 Oct 2026)
Frontier: What is included in my fare (last modified 25 Mar 2026, accessed 17 Oct 2026)
Frontier: Bag options (no date shown, accessed 17 Oct 2026)
Frontier: Bundles (no date shown, accessed 17 Oct 2026)
EazAir fare checks for SFO to BOS, 28 Sep 2026 to 9 Oct 2026; BOS to SFO, 11 Sep 2026 to 14 Oct 2026

Frequently asked questions

How do I get to SFO on Caltrain?

Change to BART at Millbrae, which BART says has a cross-platform connection to Caltrain. BART lists Millbrae as a 4-minute ride from SFO.

Is there BART parking at SFO?

No. BART says there is no parking at its SFO station, and the closest BART station parking is at Millbrae.

Is the Silver Line from Logan free?

Yes. The MBTA says SL1 service from Logan Airport is always free. It stops at every terminal and runs to South Station, which connects with the Red Line and Commuter Rail.

Which Logan terminal will I arrive at?

Airline pages list JetBlue at Terminal C, American and Southwest at Terminal B, and Delta at Terminal A and Terminal E. Terminals can change, so confirm yours with your airline.

Do the lowest fares from San Francisco to Boston include a carry-on?

JetBlue, American, Delta and Southwest include one on their lowest fare types. United Basic Economy on domestic flights and Frontier without a bundle allow just a personal item.

How far is San Francisco from Boston?

SFO and BOS are about 2697 miles apart in a straight line. Flight times vary by airline, direction and routing, so check the scheduled time shown with each result.

Airline bag fees

Baggage allowances differ significantly between fare classes (Basic/Light vs. Standard/Flex) and can change over time. Always verify the exact allowance for your specific fare with the airline before you fly.

Checked bag fees from each airline's own website
Airline	Carry-on, basic economy	1st checked bag	2nd checked bag	Source
American Airlines	Included	$45	$55	aa.com, Sep 24, 2026
United Airlines	Not included	$40	$50	united.com, Sep 24, 2026
Delta Air Lines	Included	$45	$55	delta.com, Sep 24, 2026
Southwest Airlines	Included	$45	$55	southwest.com, Oct 27, 2026
JetBlue	Included	$45	$59	jetblue.com, Sep 24, 2026
Alaska Airlines	Included	$45	$55	alaskaair.com, Sep 24, 2026
Frontier Airlines	Not included	Varies	Varies	flyfrontier.com, Sep 24, 2026
Sun Country Airlines	Not included	Varies	Varies	suncountry.com, Sep 24, 2026

Domestic US fees per bag, each way, when paid online in advance. "Varies" means the airline prices bags by route and date.

Travel tips

Arrive early for domestic flights

TSA generally recommends arriving at least 2 hours before a domestic departure, more at larger hub airports during peak travel periods.

Pack a mixed carry-on

Keep a change of clothes, chargers, and any essentials in your carry-on rather than only your checked bag, in case of a delay or a bag that doesn't arrive with you.

Ease jet lag on longer routes

On longer cross-country flights, adjusting your sleep schedule a day or two before departure and staying hydrated in flight can reduce jet lag on arrival.

Screenshot your confirmation

Save a screenshot or PDF of your booking confirmation and boarding pass before you travel, in case you lose signal or battery at the airport.

Check in online when it opens

Most airlines open online check-in 24 hours before departure. Checking in early can help with seat selection and, on some airlines, boarding group assignment.