BOS

$118 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 8/25. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Useful Info
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

Fri, Sep 11 - Wed, Sep 16
Frontier Logo
10:15 pm - 10:51 am
LAS
-
BOS
9h 36m
1 stop
Frontier Logo
12:54 pm - 11:44 pm
BOS
-
LAS
13h 50m
2 stops
$251Frontier
Sat, Sep 5 - Sat, Sep 12
Southwest Logo
3:55 pm - 12:30 am
SAN
-
BOS
5h 35mnonstop
Southwest Logo
8:40 am - 5:10 pm
BOS
-
SAN
11h 30m
2 stops
$252Southwest
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
2:15 pm - 1:10 am
SAN
-
BOS
7h 55m
1 stop
United Airlines Logo
3:45 pm - 9:24 pm
BOS
-
SAN
8h 39m
1 stop
$252United Airlines
Wed, Sep 2 - Wed, Sep 9
Southwest Logo
3:55 pm - 12:25 am
SAN
-
BOS
5h 30mnonstop
Southwest Logo
8:15 am - 2:55 pm
BOS
-
SAN
9h 40m
2 stops
$252Southwest
Mon, Aug 31 - Wed, Sep 9
Frontier Logo
11:41 pm - 11:47 am
LAS
-
BOS
9h 06m
1 stop
Frontier Logo
12:54 pm - 11:44 pm
BOS
-
LAS
13h 50m
2 stops
$253Frontier
Fri, Oct 23 - Fri, Nov 6
Multiple Airlines Logo
11:16 pm - 10:52 am
LAS
-
BOS
8h 36m
1 stop
Multiple Airlines Logo
12:11 pm - 11:39 pm
BOS
-
LAS
14h 28m
1 stop
$254Multiple Airlines
Thu, Sep 17 - Tue, Sep 22
JetBlue Logo
8:20 pm - 5:15 am
SAN
-
BOS
5h 55mnonstop
JetBlue Logo
3:41 pm - 6:46 pm
BOS
-
SAN
6h 05mnonstop
$255JetBlue
Thu, Oct 22 - Tue, Oct 27
JetBlue Logo
8:20 pm - 5:04 am
SAN
-
BOS
5h 44mnonstop
JetBlue Logo
6:30 am - 10:05 am
BOS
-
SAN
6h 35mnonstop
$255JetBlue
Wed, Oct 21 - Wed, Oct 28
Multiple Airlines Logo
5:19 pm - 5:21 am
LAS
-
BOS
9h 02m
1 stop
Multiple Airlines Logo
12:35 pm - 9:12 pm
BOS
-
LAS
11h 37m
1 stop
$259Multiple Airlines
Fri, Sep 11 - Tue, Sep 15
United Airlines Logo
2:15 pm - 1:10 am
SAN
-
BOS
7h 55m
1 stop
United Airlines Logo
7:25 am - 1:17 pm
BOS
-
SAN
8h 52m
1 stop
$262United Airlines
Useful Info

Good to know

Low season

January

Cheapest flight

$118
Best time to beat the crowds with an average 19% 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.

Everything you need to know for your flight to Boston

Information on the airport you'll fly into in Boston

Boston (BOS)