Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Los Angeles from $108

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 9/16. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
9:33 am - 5:18 pm
BOS
-
ONT
10h 45m
1 stop
Alaska Airlines Logo
6:14 pm - 6:09 am
ONT
-
BOS
8h 55m
1 stop
$377Alaska Airlines
Sun, Sep 13 - Fri, Sep 18
American Airlines Logo
5:07 pm - 9:43 pm
BOS
-
ONT
7h 36m
1 stop
American Airlines Logo
1:11 pm - 11:14 pm
ONT
-
BOS
7h 03m
1 stop
$378American Airlines
Thu, Jul 2 - Wed, Jul 8
Multiple Airlines Logo
7:12 am - 2:16 pm
BOS
-
ONT
10h 04m
1 stop
Multiple Airlines Logo
9:10 pm - 7:57 am
ONT
-
BOS
7h 47m
1 stop
$379Multiple Airlines
Tue, Sep 22 - Sun, Sep 27
Delta Logo
5:45 am - 11:04 am
BOS
-
ONT
8h 19m
1 stop
Delta Logo
5:13 pm - 6:30 am
ONT
-
BOS
10h 17m
1 stop
$383Delta
Sat, Sep 12 - Mon, Sep 21
Alaska Airlines Logo
7:59 pm - 11:16 am
BOS
-
ONT
18h 17m
1 stop
Alaska Airlines Logo
4:27 pm - 6:09 am
ONT
-
BOS
10h 42m
2 stops
$385Alaska Airlines
Wed, Sep 16 - Wed, Sep 23
JetBlue Logo
2:45 pm - 10:35 pm
BOS
-
ONT
10h 50m
1 stop
JetBlue Logo
11:58 pm - 2:43 pm
ONT
-
BOS
11h 45m
1 stop
$386JetBlue
Tue, Jul 28 - Sun, Aug 2
Southwest Logo
3:45 pm - 10:50 pm
BOS
-
ONT
10h 05m
2 stops
Southwest Logo
5:30 am - 6:00 pm
ONT
-
BOS
9h 30m
2 stops
$387Southwest
Tue, Jul 21 - Wed, Jul 22
Southwest Logo
5:20 pm - 10:25 pm
BOS
-
ONT
8h 05m
1 stop
Southwest Logo
11:55 am - 1:55 am
ONT
-
BOS
11h 00m
1 stop
$388Southwest
Thu, Jul 23 - Sun, Aug 2
JetBlue Logo
5:09 pm - 10:36 pm
BOS
-
ONT
8h 27m
1 stop
JetBlue Logo
11:18 pm - 11:33 am
ONT
-
BOS
9h 15m
1 stop
$389JetBlue
Fri, Jul 24 - Sat, Aug 1
Alaska Airlines Logo
7:59 pm - 4:10 pm
BOS
-
ONT
23h 11m
2 stops
Alaska Airlines Logo
3:14 pm - 7:39 am
ONT
-
BOS
13h 25m
1 stop
$390Alaska Airlines
Fri, Sep 11 - Mon, Sep 14

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

Alaska Airlines flights from Boston to Ontario

Our best Alaska Airlines deals on Boston to Ontario flight tickets
Alaska Airlines
Sep 13
BOS9:33 amBoston Logan Intl
10h 45m
1 stop
ONT5:18 pmOntario
Sep 19
ONT3:14 pmOntario
13h 25m
1 stop
BOS7:39 amBoston Logan Intl
$377
Alaska Airlines
Sep 16
BOS7:59 pmBoston Logan Intl
18h 17m
1 stop
ONT11:16 amOntario
Sep 23
ONT4:27 pmOntario
10h 42m
2 stops
BOS6:09 amBoston Logan Intl
$385
Alaska Airlines
Sep 11
BOS7:59 pmBoston Logan Intl
23h 11m
2 stops
ONT4:10 pmOntario
Sep 14
ONT3:14 pmOntario
13h 25m
1 stop
BOS7:39 amBoston Logan Intl
$390

United Airlines flights from Boston to Ontario

Our best United Airlines deals on Boston to Ontario flight tickets
United Airlines
Nov 13
BOS5:30 amBoston Logan Intl
9h 50m
1 stop
ONT12:20 pmOntario
Nov 16
ONT6:53 pmOntario
10h 30m
1 stop
BOS8:23 amBoston Logan Intl
$403
United Airlines
Sep 13
BOS6:00 amBoston Logan Intl
9h 12m
1 stop
ONT12:12 pmOntario
Sep 18
ONT7:13 pmOntario
14h 34m
2 stops
BOS12:47 pmBoston Logan Intl
$428
United Airlines
Jun 27
BOS9:07 amBoston Logan Intl
9h 22m
1 stop
ONT3:29 pmOntario
Jul 18
ONT1:50 pmOntario
8h 21m
1 stop
BOS1:11 amBoston Logan Intl
$429

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 June 13, 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

Cheapest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 9/13

9:33 am-5:18 pm

1 stop10h 45m

Ontario

Fri 9/18

6:14 pm-6:09 am

1 stop8h 55m

$377
Quickest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 7/2

5:07 pm-9:43 pm

1 stop7h 36m

Ontario

Wed 7/8

1:11 pm-11:14 pm

1 stop7h 03m

$378

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 9/22

7:12 am-2:16 pm

1 stop10h 04m

Ontario

Sun 9/27

9:10 pm-7:57 am

1 stop7h 47m

$379

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 9/12

5:45 am-11:04 am

1 stop8h 19m

Ontario

Mon 9/21

5:13 pm-6:30 am

1 stop10h 17m

$383

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/16

7:59 pm-11:16 am

1 stop18h 17m

Ontario

Wed 9/23

4:27 pm-6:09 am

2 stops10h 42m

$385

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 7/28

2:45 pm-10:35 pm

1 stop10h 50m

Ontario

Sun 8/2

11:58 pm-2:43 pm

1 stop11h 45m

$386

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 7/21

3:45 pm-10:50 pm

2 stops10h 05m

Ontario

Wed 7/22

5:30 am-6:00 pm

2 stops9h 30m

$387

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 7/23

5:20 pm-10:25 pm

1 stop8h 05m

Ontario

Sun 8/2

11:55 am-1:55 am

1 stop11h 00m

$388

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/24

5:09 pm-10:36 pm

1 stop8h 27m

Ontario

Sat 8/1

11:18 pm-11:33 am

1 stop9h 15m

$389

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 9/11

7:59 pm-4:10 pm

2 stops23h 11m

Ontario

Mon 9/14

3:14 pm-7:39 am

1 stop13h 25m

$390

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 typical price of a round-trip flight between Boston and Ontario?

What is the cheapest month to fly to Ontario?

In general, February 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 $317. If you aren’t able to travel during the month of February, then book flights to Ontario from Boston during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $366.

How far in advance should I book a flight from Boston 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 $488 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 $332 on momondo.

How have Boston to Ontario flight prices changed over time?

As of June 2026, prices for Boston to Ontario flights are approximately 2% 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 22m

Direct flights

None
The fastest flight from Boston to Ontario takes 8h 22m
There are no direct flights from Boston to Ontario. There are no popular flight routes from Boston to Ontario.
Search flight deals

Frequently asked questions about flying from Boston to Ontario

  • 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 22m.

  • 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
8,405 reviews
Search Delta flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,818 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.1
11,648 reviews
Search American Airlines flights
SouthwestPriceFrom $305Free CancellationRating
7.9
4,235 reviews
Search Southwest flights
JetBluePriceFrom $319Free CancellationRating
7.1
2,979 reviews
Search JetBlue 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
Mon 7/13
Mon 7/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States