Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Los Angeles from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Los Angeles departing on 4/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Boston to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m
1 stop
Alaska Airlines Logo
4:02 pm - 6:54 am
ONT
-
BOS
11h 52m
1 stop
$259Alaska Airlines
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
7:48 am - 5:41 pm
BOS
-
ONT
12h 53m
2 stops
United Airlines Logo
1:50 pm - 12:49 am
ONT
-
BOS
7h 59m
1 stop
$264United Airlines
Sat, Feb 28 - Mon, Mar 2
Alaska Airlines Logo
4:36 pm - 11:52 pm
BOS
-
ONT
10h 16m
1 stop
Alaska Airlines Logo
4:02 pm - 6:54 am
ONT
-
BOS
11h 52m
1 stop
$266Alaska Airlines
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
6:00 am - 1:49 pm
BOS
-
ONT
10h 49m
2 stops
American Airlines Logo
11:58 pm - 12:16 pm
ONT
-
BOS
9h 18m
2 stops
$269American Airlines
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
3:09 pm - 8:50 pm
BOS
-
ONT
8h 41m
1 stop
United Airlines Logo
6:37 pm - 7:58 am
ONT
-
BOS
10h 21m
1 stop
$273United Airlines
Wed, Feb 25 - Thu, Mar 5
Alaska Airlines Logo
4:36 pm - 11:52 pm
BOS
-
ONT
10h 16m
1 stop
Alaska Airlines Logo
12:02 pm - 11:59 pm
ONT
-
BOS
8h 57m
1 stop
$276Alaska Airlines
Mon, Mar 2 - Tue, Mar 3
Alaska Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m
1 stop
Alaska Airlines Logo
4:02 pm - 6:54 am
ONT
-
BOS
11h 52m
1 stop
$278Alaska Airlines
Wed, Feb 25 - Thu, Mar 5
United Airlines Logo
6:00 am - 12:43 pm
BOS
-
ONT
9h 43m
2 stops
United Airlines Logo
6:37 pm - 7:58 am
ONT
-
BOS
10h 21m
1 stop
$279United Airlines
Wed, Feb 25 - Thu, Mar 5
United Airlines Logo
11:00 am - 5:41 pm
BOS
-
ONT
9h 41m
1 stop
United Airlines Logo
11:59 pm - 12:56 pm
ONT
-
BOS
9h 57m
2 stops
$283United Airlines
Thu, Feb 26 - Tue, Mar 10
Hawaiian Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m
1 stop
Hawaiian Airlines Logo
4:02 pm - 6:54 am
ONT
-
BOS
11h 52m
1 stop
$287Hawaiian Airlines
Sat, Feb 21 - Sat, Feb 28

Delta flights from Boston to Ontario

Our best Delta deals on Boston to Ontario flight tickets
Delta
Mar 17
BOS6:44 pmBoston Logan Intl
8h 07m
1 stop
ONT11:51 pmOntario
Apr 7
ONT1:20 pmOntario
7h 39m
1 stop
BOS11:59 pmBoston Logan Intl
$297
Delta
Feb 25
BOS3:30 pmBoston Logan Intl
8h 35m
1 stop
ONT9:05 pmOntario
Feb 27
ONT1:10 pmOntario
7h 52m
1 stop
BOS12:02 amBoston Logan Intl
$307
Delta
Mar 18
BOS7:10 amBoston Logan Intl
13h 03m
1 stop
ONT5:13 pmOntario
Mar 23
ONT5:53 pmOntario
9h 57m
1 stop
BOS6:50 amBoston Logan Intl
$341

Alaska Airlines flights from Boston to Ontario

Our best Alaska Airlines deals on Boston to Ontario flight tickets
Alaska Airlines
Mar 3
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
Mar 5
ONT4:02 pmOntario
11h 52m
1 stop
BOS6:54 amBoston Logan Intl
$259
Alaska Airlines
Mar 2
BOS4:36 pmBoston Logan Intl
10h 16m
1 stop
ONT11:52 pmOntario
Mar 10
ONT4:02 pmOntario
11h 52m
1 stop
BOS6:54 amBoston Logan Intl
$266
Alaska Airlines
Mar 2
BOS4:36 pmBoston Logan Intl
10h 16m
1 stop
ONT11:52 pmOntario
Mar 3
ONT12:02 pmOntario
8h 57m
1 stop
BOS11:59 pmBoston Logan Intl
$276

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Ontario 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 February 10, 2026.
Use the filters below to find and compare flights from Boston to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 3/3

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Tue 3/10

4:02 pm-6:54 am

1 stop11h 52m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 2/28

7:48 am-5:41 pm

2 stops12h 53m

Ontario

Mon 3/2

1:50 pm-12:49 am

1 stop7h 59m

$264

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 3/2

4:36 pm-11:52 pm

1 stop10h 16m

Ontario

Tue 3/10

4:02 pm-6:54 am

1 stop11h 52m

$266

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 3/3

6:00 am-1:49 pm

2 stops10h 49m

Ontario

Tue 3/10

11:58 pm-12:16 pm

2 stops9h 18m

$269

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/25

3:09 pm-8:50 pm

1 stop8h 41m

Ontario

Thu 3/5

6:37 pm-7:58 am

1 stop10h 21m

$273

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 3/2

4:36 pm-11:52 pm

1 stop10h 16m

Ontario

Tue 3/3

12:02 pm-11:59 pm

1 stop8h 57m

$276

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/25

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Thu 3/5

4:02 pm-6:54 am

1 stop11h 52m

$278

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/25

6:00 am-12:43 pm

2 stops9h 43m

Ontario

Thu 3/5

6:37 pm-7:58 am

1 stop10h 21m

$279

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 2/26

11:00 am-5:41 pm

1 stop9h 41m

Ontario

Tue 3/10

11:59 pm-12:56 pm

2 stops9h 57m

$283

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 2/21

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sat 2/28

4:02 pm-6:54 am

1 stop11h 52m

$287

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Boston to Ontario

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 Ontario?

In general, May is the cheapest month to fly from Boston to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $345. If you aren’t able to travel during the month of May, then book flights to Ontario from Boston during July instead. Flights to Ontario in July, while not as cheap as those in May, still average around $358.

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

You are more likely to see cheaper flights to Ontario from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $407 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Boston for as low as $301 on momondo.

How have Boston to Ontario flight prices changed over time?

As of February 2026, prices for Boston to Ontario flights are approximately 3% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Ontario

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

Cheap Boston to Ontario (BOS to ONT) flight deals and tips

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

Fastest flight time

8h 12m

Direct flights

None
The fastest flight from Boston to Ontario takes 8h 12m
There are no direct flights from Boston to Ontario. There are no popular flight routes from Boston to Ontario.
Search flight deals

  • How far is Boston Logan Intl to Ontario by plane?

    The distance between Boston Logan Intl and Ontario is about 2558.5 mi. A reasonable flight in good conditions will take 8h 12m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Boston to Ontario?

Best airlines flying from Boston to Ontario

Compare and see reviews for airlines that fly from Boston to Ontario with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $149Free CancellationRating
7.9
8,178 reviews
Search Delta flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,267 reviews
Search United Airlines flights
American AirlinesPriceFrom $266Free CancellationRating
7.2
11,259 reviews
Search American Airlines flights
JetBluePriceFrom $270Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
SouthwestPriceFrom $317Free CancellationRating
8.0
4,282 reviews
Search Southwest flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Boston.

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

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

How can momondo help me find flights from Boston to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Ontario from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ontario 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
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 3/12
Thu 3/19
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States