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Cheap flights from San Francisco to Boston from $127

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Boston departing on 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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United Airlines Logo
1:05 pm - 9:43 pmSFO-BOS
5h 38mnonstop
United Airlines Logo
6:00 am - 11:49 amBOS-SFO
8h 49m1 stop
$226United Airlines
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Wed, Dec 10 - Mon, Dec 15
Delta Logo
9:41 pm - 6:24 amSFO-BOS
5h 43mnonstop
Delta Logo
7:50 am - 11:50 amBOS-SFO
7h 00mnonstop
$227Delta
Find Deal
Wed, Dec 3 - Fri, Jan 9
JetBlue Logo
9:00 pm - 7:42 amSFO-BOS
7h 42m1 stop
JetBlue Logo
6:45 am - 10:33 amBOS-SFO
6h 48mnonstop
$230JetBlue
Find Deal
Mon, Dec 15 - Wed, Dec 17
United Airlines Logo
10:45 am - 7:24 pmSFO-BOS
5h 39mnonstop
United Airlines Logo
6:00 am - 9:45 amBOS-SFO
6h 45mnonstop
$231United Airlines
Find Deal
Sun, Dec 7 - Wed, Dec 10
Delta Logo
7:00 am - 3:35 pmSFO-BOS
5h 35mnonstop
Delta Logo
7:50 am - 11:50 amBOS-SFO
7h 00mnonstop
$232Delta
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Fri, Dec 5 - Thu, Jan 8
Multiple Airlines Logo
10:10 pm - 11:56 pmSFO-BOS
22h 46m2 stops
Multiple Airlines Logo
6:00 am - 1:24 pmBOS-SFO
10h 24m1 stop
$233Multiple Airlines
Find Deal
Wed, Dec 3 - Tue, Jan 13
Multiple Airlines Logo
10:10 pm - 11:56 pmSFO-BOS
22h 46m2 stops
Multiple Airlines Logo
6:00 am - 1:18 pmBOS-SFO
10h 18m1 stop
$234Multiple Airlines
Find Deal
Wed, Dec 3 - Thu, Jan 8
Alaska Airlines Logo
7:25 am - 4:12 pmSFO-BOS
5h 47mnonstop
Alaska Airlines Logo
7:23 pm - 11:10 pmBOS-SFO
6h 47mnonstop
$235Alaska Airlines
Find Deal
Wed, Dec 24 - Mon, Dec 29
United Airlines Logo
10:55 pm - 7:36 amSFO-BOS
5h 41mnonstop
United Airlines Logo
6:00 am - 11:57 amBOS-SFO
8h 57m1 stop
$236United Airlines
Find Deal
Sat, Dec 13 - Fri, Jan 9
United Airlines Logo
1:05 pm - 9:43 pmSFO-BOS
5h 38mnonstop
United Airlines Logo
6:00 am - 9:45 amBOS-SFO
6h 45mnonstop
$237United Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15

JetBlue flights from San Francisco to Boston

Our best JetBlue deals on San Francisco to Boston flight tickets
JetBlue
Dec 15
SFO9:00 pmSan Francisco
7h 42m
1 stop
BOS7:42 amBoston Logan Intl
Dec 17
BOS6:45 amBoston Logan Intl
6h 48m
SFO10:33 amSan Francisco
$230
Find similar
JetBlue
Dec 25
SFO3:22 pmSan Francisco
5h 33m
BOS11:55 pmBoston Logan Intl
Jan 7
BOS7:00 amBoston Logan Intl
6h 59m
SFO10:59 amSan Francisco
$239
Find similar
JetBlue
Nov 27
SFO12:15 pmSan Francisco
5h 33m
BOS8:48 pmBoston Logan Intl
Dec 7
BOS8:14 pmBoston Logan Intl
6h 45m
SFO11:59 pmSan Francisco
$242
Find similar

Alaska Airlines flights from San Francisco to Boston

Our best Alaska Airlines deals on San Francisco to Boston flight tickets
Alaska Airlines
Dec 24
SFO7:25 amSan Francisco
5h 47m
BOS4:12 pmBoston Logan Intl
Dec 28
BOS7:23 pmBoston Logan Intl
6h 47m
SFO11:10 pmSan Francisco
$235
Find similar
Alaska Airlines
Dec 25
SFO10:13 amSan Francisco
11h 10m
1 stop
BOS12:23 amBoston Logan Intl
Dec 31
BOS7:23 pmBoston Logan Intl
6h 47m
SFO11:10 pmSan Francisco
$244
Find similar
Alaska Airlines
Dec 28
SFO7:25 amSan Francisco
5h 47m
BOS4:12 pmBoston Logan Intl
Dec 28
BOS7:23 pmBoston Logan Intl
6h 47m
SFO11:10 pmSan Francisco
$248
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/10

1:05 pm-9:43 pm

Nonstop5h 38m

Boston Logan Intl

Mon 12/15

6:00 am-11:49 am

1 stop8h 49m

$226

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/3

9:41 pm-6:24 am

Nonstop5h 43m

Boston Logan Intl

Fri 1/9

7:50 am-11:50 am

Nonstop7h 00m

$227

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 12/15

9:00 pm-7:42 am

1 stop7h 42m

Boston Logan Intl

Wed 12/17

6:45 am-10:33 am

Nonstop6h 48m

$230

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 12/7

10:45 am-7:24 pm

Nonstop5h 39m

Boston Logan Intl

Wed 12/10

6:00 am-9:45 am

Nonstop6h 45m

$231

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 12/5

7:00 am-3:35 pm

Nonstop5h 35m

Boston Logan Intl

Thu 1/8

7:50 am-11:50 am

Nonstop7h 00m

$232

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/3

10:10 pm-11:56 pm

2 stops22h 46m

Boston Logan Intl

Tue 1/13

6:00 am-1:24 pm

1 stop10h 24m

$233

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/3

10:10 pm-11:56 pm

2 stops22h 46m

Boston Logan Intl

Thu 1/8

6:00 am-1:18 pm

1 stop10h 18m

$234

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/24

7:25 am-4:12 pm

Nonstop5h 47m

Boston Logan Intl

Mon 12/29

7:23 pm-11:10 pm

Nonstop6h 47m

$235

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 12/13

10:55 pm-7:36 am

Nonstop5h 41m

Boston Logan Intl

Fri 1/9

6:00 am-11:57 am

1 stop8h 57m

$236

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 12/12

1:05 pm-9:43 pm

Nonstop5h 38m

Boston Logan Intl

Mon 12/15

6:00 am-9:45 am

Nonstop6h 45m

$237

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Boston from

How to get the cheapest flight ticket from San Francisco to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Boston?

In general, January is the cheapest month to fly from San Francisco to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $316. If you aren’t able to travel during the month of January, then book flights to Boston from San Francisco during February instead. Flights to Boston in February, while not as cheap as those in January, still average around $317.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from San Francisco to Boston is on a Wednesday when prices can be found for as low as $383. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $487.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from San Francisco to Boston in the afternoon for as low as $365. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $442 per ticket.

What is the cheapest San Francisco to Boston Logan Intl flight route?

Fly from San Francisco to Boston Logan Intl for the best San Francisco - Boston Logan Intl flight prices

How far in advance should I book a flight to Boston?

You are more likely to see cheaper flights to Boston from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $382 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from San Francisco for as low as $345 on momondo.

What cabin class options are available on San Francisco to Boston Logan Intl flights?

There are 4 cabin classes available to choose from on San Francisco to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Francisco to Boston flight prices changed over time?

As of November 2025, prices for San Francisco to Boston flights are approximately 5% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Boston (SFO to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Boston

Best Price Found

$179

Fastest flight time

5h 29m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from San Francisco in the past 72 hours is $179. The best round-trip flight deal from San Francisco to Boston found on momondo in the last 72 hours is $296.
The fastest flight from San Francisco to Boston takes 5h 29m
Direct flights go from San Francisco to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)
Search flight deals

  • How far is San Francisco to Boston Logan Intl by plane?

    San Francisco and Boston Logan Intl are 2690.2 mi apart from one another. Flights usually cover this in 5h 30m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from San Francisco Airport to Boston Logan Intl Airport?

    Prices for flights from San Francisco Airport to Boston Logan Intl Airport are updated daily.

  • How many operators does momondo search for flights from San Francisco Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from San Francisco Airport to Boston Logan Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from San Francisco to Boston?

  • What is the most popular airline from San Francisco to Boston?

Best airlines flying from San Francisco to Boston

Compare and see reviews for airlines that fly from San Francisco to Boston with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $100Free CancellationRating
5.8
3,104 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $144Free CancellationRating
7.8
2,811 reviews
Search Hawaiian Airlines flights
Sun Country AirPriceFrom $160Free CancellationRating
6.9
334 reviews
Search Sun Country Air flights
DeltaPriceFrom $183Free CancellationRating
7.9
8,002 reviews
Search Delta flights
SouthwestPriceFrom $186Free CancellationRating
8.0
4,251 reviews
Search Southwest flights
JetBluePriceFrom $208Free CancellationRating
7.2
2,902 reviews
Search JetBlue flights
United AirlinesPriceFrom $231Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $238Free CancellationRating
8.0
11,326 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $249Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights

  • Alaska Airlines Flights From San Francisco to Boston

    Alaska Airlines operates around 1 flight from San Francisco to Boston every week. The average price of these flights found in the last 72 hours has been $403, but momondo users have found Alaska Airlines deals from San Francisco to Boston from as low as $238 round-trip. Alaska Airlines has been scored 8.0/10 in 11,326 reviews.

  • Delta Flights From San Francisco to Boston

    Across 8,002 Delta reviews on momondo, the average score is 7.9/10. Delta flies from San Francisco to Boston about 12 times each week, with ticket deals ranging from $183 to $380. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
Cambridge
South Yarmouth
Narragansett
Nashua
Gloucester
Falmouth
Laconia
Brockton
Concord
Everett
Sturbridge
Chatham

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Boston?

It is quick and easy to find San Francisco to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.

Can I find flights from San Francisco to Boston with flexible booking policies on momondo?

momondo does allow users to show only those flights to Boston from San Francisco which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Francisco to Boston?

momondo helps you find the best flight between San Francisco and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Francisco to Boston right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Boston, momondo offers a useful price alert feature which will track prices for flights to Boston from San Francisco and alert you when they change.

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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