BOS

$124 Find Cheap Flights from California to Boston - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Boston departing on 7/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from California to Boston

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from California to Boston that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from California to Boston

Sun, Aug 9 - Tue, Aug 18
JetBlue Logo
11:50 pm - 11:21 am
ONT
-
BOS
8h 31m
1 stop
JetBlue Logo
2:45 pm - 10:35 pm
BOS
-
ONT
10h 50m
1 stop
$246JetBlue
Wed, Aug 5 - Wed, Aug 12
JetBlue Logo
11:51 pm - 11:16 am
ONT
-
BOS
8h 25m
1 stop
JetBlue Logo
4:30 pm - 10:35 pm
BOS
-
ONT
9h 05m
1 stop
$252JetBlue
Tue, Aug 25 - Wed, Aug 26
Southwest Logo
11:55 pm - 9:55 am
OAK
-
BOS
7h 00m
1 stop
Southwest Logo
3:20 pm - 11:05 pm
BOS
-
OAK
10h 45m
1 stop
$265Southwest
Mon, Aug 24 - Sat, Sep 5
Alaska Airlines Logo
8:59 pm - 5:49 am
SAN
-
BOS
5h 50mnonstop
Alaska Airlines Logo
8:00 am - 11:12 am
BOS
-
SAN
6h 12mnonstop
$267Alaska Airlines
Tue, Jul 14 - Thu, Jul 23
Frontier Logo
9:00 am - 9:09 am
LAS
-
BOS
21h 09m
1 stop
Frontier Logo
11:52 am - 8:26 pm
BOS
-
LAS
11h 34m
1 stop
$268Frontier
Mon, Aug 31 - Sat, Sep 12
Alaska Airlines Logo
8:59 pm - 5:49 am
SAN
-
BOS
5h 50mnonstop
Alaska Airlines Logo
8:00 am - 11:12 am
BOS
-
SAN
6h 12mnonstop
$270Alaska Airlines
Tue, Aug 25 - Sun, Sep 6
Delta Logo
10:02 pm - 6:40 am
SAN
-
BOS
5h 38mnonstop
Delta Logo
7:50 am - 10:58 am
BOS
-
SAN
6h 08mnonstop
$272Delta
Thu, Sep 10 - Sat, Sep 19
Delta Logo
10:04 pm - 6:40 am
SAN
-
BOS
5h 36mnonstop
Delta Logo
5:10 pm - 8:15 pm
BOS
-
SAN
6h 05mnonstop
$273Delta
Wed, Sep 9 - Wed, Sep 23
Southwest Logo
10:40 pm - 9:00 am
SAN
-
BOS
7h 20m
1 stop
Southwest Logo
9:05 am - 12:00 pm
BOS
-
SAN
5h 55mnonstop
$275Southwest
Sat, Aug 15 - Thu, Aug 20
Frontier Logo
11:05 pm - 10:57 am
SFO
-
BOS
8h 52m
1 stop
Frontier Logo
12:45 pm - 7:03 pm
BOS
-
SFO
9h 18m
1 stop
$321Frontier
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$124
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Ontario to Boston

Flights from California to Boston: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from California to Boston 
Learn how KAYAK collects reviews and tips from users.
alyciaFlew with American Airlines
LAX
-
BOS
Mar 2026
Switching terminals in Boston was a VERY long walk -- dont cut your connection close if you are going from B to E
NicoleFlew with JetBlue
LAX
-
BOS
Apr 2026
Bring your own snacks/food. Extra legroom is nice but not really worth the extra money, unless you want free alcohol.
ericFlew with Air New Zealand
SFO
-
BOS
Jan 2025
At least two hour connection Buy food pre-flight

FAQs for booking flights from California to Boston

  • How does KAYAK find such low prices on flights from California to Boston?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from California to Boston.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to Boston?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston from California is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from California to Boston?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boston with an airline and back to California with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from California to Boston?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boston from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Hampton
Warwick
Waltham
Wells
Everett
Middletown
Plymouth
Gloucester
Concord
Woburn
Brookline
Revere
York Beach
Burlington
South Portland
Braintree
West Yarmouth
Danvers
Somerville

Everything you need to know for your flight to Boston

Information on the airport you'll fly into in Boston

Boston (BOS)