BOS

$111 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 9/21. 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

mié., ago. 19 - mar., ago. 25
Southwest Logo
1:00 pm - 12:25 am
SJC
-
BOS
8h 25m
1 stop
Southwest Logo
10:50 am - 6:20 pm
BOS
-
SJC
10h 30m
1 stop
$185Southwest
mié., ago. 19 - mié., ago. 26
Southwest Logo
1:00 pm - 12:25 am
SJC
-
BOS
8h 25m
1 stop
Southwest Logo
2:45 pm - 9:40 pm
BOS
-
SJC
9h 55m
2 stops
$190Southwest
mié., sep. 30 - sáb., oct. 3
American Airlines Logo
8:00 am - 9:27 pm
SNA
-
BOS
10h 27m
1 stop
American Airlines Logo
6:00 am - 2:16 pm
BOS
-
SNA
11h 16m
1 stop
$231American Airlines
mar., sep. 29 - sáb., oct. 3
Frontier Logo
10:05 pm - 12:05 pm
LAS
-
BOS
11h 00m
1 stop
Frontier Logo
1:00 pm - 10:29 pm
BOS
-
LAS
12h 29m
1 stop
$258Frontier
mar., ago. 25 - mar., sep. 1
Frontier Logo
11:50 pm - 11:47 am
LAS
-
BOS
8h 57m
1 stop
Frontier Logo
12:45 pm - 9:00 pm
BOS
-
LAS
11h 15m
1 stop
$259Frontier
vie., ago. 7 - jue., ago. 27
American Airlines Logo
12:23 pm - 11:24 pm
SNA
-
BOS
8h 01m
1 stop
American Airlines Logo
6:30 am - 12:30 pm
BOS
-
SNA
9h 00m
1 stop
$261American Airlines
mié., ago. 5 - mié., ago. 12
United Airlines Logo
11:30 pm - 9:29 am
LAS
-
BOS
6h 59m
1 stop
United Airlines Logo
9:00 am - 2:44 pm
BOS
-
LAS
8h 44m
1 stop
$267United Airlines
mar., ago. 18 - vie., ago. 21
Multiple Airlines Logo
12:12 pm - 8:34 pm
LAS
-
BOS
5h 22mnonstop
Multiple Airlines Logo
10:04 am - 11:48 am
BOS
-
LAS
28h 44m
1 stop
$273Multiple Airlines
jue., ago. 27 - dom., ago. 30
Multiple Airlines Logo
11:34 pm - 11:47 am
LAX
-
BOS
9h 13m
1 stop
Multiple Airlines Logo
7:00 am - 10:09 am
BOS
-
LAX
6h 09mnonstop
$274Multiple Airlines
mar., ago. 4 - mié., ago. 19
United Airlines Logo
10:35 pm - 9:29 am
LAX
-
BOS
7h 54m
1 stop
United Airlines Logo
6:35 pm - 9:50 pm
BOS
-
LAX
6h 15mnonstop
$276United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$111
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)