EAZAIR
Route guide

Cheap Flights from Boston to San Francisco | EazAir

Travellers

Boston to San Francisco flight insights

Average flight time

~6h 17m (estimated)

BOS → SFO

Cheapest month

—

Based on cached fare history

Cheapest cached price

$179

Checking live fares…

Last checked Sep 21, 2026

Planning a trip from Boston to San Francisco? The average flight time on this route is ~6h 17m (estimated). The lowest fare we have cached for this route is $179 (last checked Sep 21, 2026).

Boston to San Francisco 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.

Route Quick Facts

Quick facts for flights from Boston to San Francisco on Eazair
OriginBoston (BOS)
DestinationSan Francisco (SFO)
Average Flight Time—
Cheapest Month to Fly—
Current Lowest Fare$179
Fares Last CheckedSep 21, 2026

Flight deals from Boston to San Francisco

Flying from Boston to San Francisco covers a distance of approximately 2,700 miles across the United States. Nonstop flights originating at Boston Logan International Airport (BOS) and landing at San Francisco International Airport (SFO) typically take around six and a half hours. Passengers traveling on this transcontinental route will cross four time zones, meaning a morning departure from Massachusetts lands in Northern California by early afternoon local time. Several major carriers operate direct flights between Boston and San Francisco. JetBlue Airways, United Airlines, and Delta Air Lines frequently offer daily nonstop service from BOS to SFO, accommodating thousands of passengers each week. Travelers willing to take a connecting flight can also find options through American Airlines and Alaska Airlines, with common layovers in hubs like Chicago, Denver, or Seattle before arriving at SFO. The summer months of June, July, and August represent the busiest travel season for the Boston to San Francisco corridor. Fares for BOS to SFO tickets tend to peak around major holidays like Thanksgiving and Christmas, driven by heavy cross-country family travel. To secure the lowest prices for this specific journey, travelers should target flights during the shoulder season months of February or October when passenger demand subsides.

View of San Francisco, a popular flight destination from Boston

About San Francisco

Popular areas to know in San Francisco include Mission District, North Beach, and Hayes Valley.

A Mediterranean climate, though famously cool and foggy in summer due to marine influence.

Frequently asked questions

How long is a direct flight from Boston to San Francisco?
A nonstop flight from Boston (BOS) to San Francisco (SFO) takes approximately six hours and thirty minutes to cover the 2,700-mile distance.
Which airports handle flights from Boston to San Francisco?
Flights on this route depart from Boston Logan International Airport (BOS) and arrive at San Francisco International Airport (SFO).
Which airlines fly direct from Boston to San Francisco?
JetBlue Airways, United Airlines, and Delta Air Lines regularly operate nonstop flights connecting Boston and San Francisco.
What is the cheapest month to book flights from Boston to San Francisco?
January and February generally offer the lowest airfare for flights departing Boston and arriving in San Francisco, as post-holiday travel demand decreases.
How far in advance should I purchase my ticket from Boston to San Francisco?
For the best rates on the Boston to San Francisco route, you should aim to book your flights at least four to six weeks before your desired departure date.
What are the baggage allowances for a standard economy ticket from Boston to San Francisco?
Most standard economy fares from Boston to San Francisco include one personal item and one carry-on bag, but you will typically need to pay an extra fee for a checked suitcase depending on the specific carrier.
Are there common layover cities when flying from Boston to San Francisco?
If you book a connecting flight from Boston to San Francisco, you will frequently layover in cities like Chicago, Denver, or Newark.
How does the time zone change affect flights from Boston to San Francisco?
Boston is in the Eastern Time Zone, which is three hours ahead of San Francisco in the Pacific Time Zone, meaning you regain three hours on the clock when flying west.
Are there red-eye flights available from Boston to San Francisco?
Most overnight red-eye options operate in the reverse direction, so early morning departures are far more common for travelers heading from Boston to San Francisco.
What is the best way to get to the city center after flying from Boston to San Francisco?
After arriving in San Francisco from Boston, travelers can take the Bay Area Rapid Transit train directly from the SFO international terminal into downtown.
Does winter weather impact flights from Boston to San Francisco?
Winter snowstorms in New England can occasionally cause departure delays for flights leaving Boston bound for San Francisco, particularly between December and March.
How far is it from Boston to San Francisco?
The straight-line distance from Boston to San Francisco is about 2,697 miles.
What ID do I need to fly from Boston to San Francisco?
Since Boston to San Francisco is a domestic US flight, you'll need a REAL ID-compliant driver's license or another TSA-accepted form of ID, such as a valid US passport. A standard, non-compliant driver's license alone is no longer accepted at TSA checkpoints.
Which airlines operate flights from Boston to San Francisco?
Based on a recent live fare search, JetBlue, Delta Air Lines, American Airlines and United Airlines had bookable flights on the Boston to San Francisco route.
What's the weather usually like in San Francisco?
A Mediterranean climate, though famously cool and foggy in summer due to marine influence.

Airline baggage policies

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.

General airline baggage policy reference
AirlineCabin bagChecked bag
Delta Air Lines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it
American Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main Cabin and above; Basic Economy usually excludes it
United Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Economy and above; Basic Economy usually excludes it
Southwest Airlines1 carry-on + 1 personal item2 checked bags included on every fare — a long-standing, well-known Southwest policy
JetBlue Airways1 personal item on the cheapest (Blue Basic) fare; a carry-on is added on higher faresNot included on Blue Basic; typically included from Blue Plus and above
Alaska Airlines1 carry-on + 1 personal item on most fares1 checked bag typically included on Main and above; Saver fares usually exclude it
Spirit Airlines1 personal item included; a full-sized carry-on is a paid add-onNot included on the base fare — a paid add-on at every fare tier
Frontier Airlines1 personal item included; a full-sized carry-on is a paid add-onNot included on the base fare — a paid add-on at every fare tier

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.

Related Flights from Boston

Popular alternative routes travellers compare on EAZAIR.

See every destination from Boston
Skyline view of Atlanta — flights from Boston to Atlanta
Boston → Atlanta

Boston → Atlanta

From $138

Last checked Sep 20, 2026 · may not be current

Compare fares →
Skyline view of Charlotte — flights from Boston to Charlotte
Boston → Charlotte

Boston → Charlotte

From $127

Last checked Sep 14, 2026 · may not be current

Compare fares →
Skyline view of Chicago — flights from Boston to Chicago
Boston → Chicago

Boston → Chicago

From $138

Last checked Sep 24, 2026

Compare fares →
Skyline view of Dallas — flights from Boston to Dallas
Boston → Dallas

Boston → Dallas

From $193

Last checked Sep 24, 2026

Compare fares →

Related Flights to San Francisco

Other routes travellers compare when flying into San Francisco.

Skyline view of San Francisco — flights from Chicago to San Francisco
Chicago → San Francisco

Chicago → San Francisco

From $209

Last checked Sep 19, 2026 · may not be current

Compare fares →
Skyline view of San Francisco — flights from Dallas to San Francisco
Dallas → San Francisco

Dallas → San Francisco

From $181

Last checked Sep 17, 2026 · may not be current

Compare fares →
Skyline view of San Francisco — flights from Denver to San Francisco
Denver → San Francisco

Denver → San Francisco

From $95

Last checked Sep 17, 2026 · may not be current

Compare fares →
Skyline view of San Francisco — flights from Houston to San Francisco
Houston → San Francisco

Houston → San Francisco

From $168

Last checked Sep 5, 2026 · may not be current

Compare fares →