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Cheap flights from Boston to Los Angeles from $149

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 7/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Boston to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:05 am - 12:10 pm
BOS
-
ONT
9h 05m
1 stop
Delta Logo
6:01 pm - 7:35 am
ONT
-
BOS
10h 34m
1 stop
$338Delta
Sun, Jul 19 - Wed, Jul 22
Southwest Logo
5:25 am - 1:50 pm
BOS
-
ONT
11h 25m
1 stop
Southwest Logo
11:55 pm - 12:15 pm
ONT
-
BOS
9h 20m
1 stop
$339Southwest
Fri, Jul 10 - Tue, Jul 14
Southwest Logo
5:40 am - 10:20 am
BOS
-
ONT
7h 40m
1 stop
Southwest Logo
8:40 pm - 9:55 am
ONT
-
BOS
10h 15m
2 stops
$343Southwest
Mon, Aug 24 - Mon, Aug 31
Delta Logo
6:05 am - 12:10 pm
BOS
-
ONT
9h 05m
1 stop
Delta Logo
10:00 pm - 5:51 pm
ONT
-
BOS
16h 51m
2 stops
$350Delta
Tue, Jul 21 - Mon, Jul 27
Southwest Logo
5:40 am - 10:20 am
BOS
-
ONT
7h 40m
1 stop
Southwest Logo
8:35 am - 9:25 pm
ONT
-
BOS
9h 50m
2 stops
$352Southwest
Sat, Aug 29 - Wed, Sep 2
Alaska Airlines Logo
7:12 am - 2:16 pm
BOS
-
ONT
10h 04m
1 stop
Alaska Airlines Logo
6:14 pm - 6:09 am
ONT
-
BOS
8h 55m
1 stop
$353Alaska Airlines
Fri, Sep 18 - Fri, Sep 18
Alaska Airlines Logo
7:12 am - 2:16 pm
BOS
-
ONT
10h 04m
1 stop
Alaska Airlines Logo
6:54 pm - 7:29 am
ONT
-
BOS
9h 35m
1 stop
$359Alaska Airlines
Wed, Sep 30 - Tue, Oct 6
American Airlines Logo
10:48 am - 6:21 pm
BOS
-
ONT
10h 33m
2 stops
American Airlines Logo
10:10 pm - 9:19 am
ONT
-
BOS
8h 09m
1 stop
$364American Airlines
Wed, Jul 1 - Mon, Jul 6
Southwest Logo
5:40 am - 10:20 am
BOS
-
ONT
7h 40m
1 stop
Southwest Logo
9:20 am - 9:40 pm
ONT
-
BOS
9h 20m
2 stops
$368Southwest
Thu, Sep 17 - Sat, Sep 19
Southwest Logo
5:25 am - 1:50 pm
BOS
-
ONT
11h 25m
1 stop
Southwest Logo
5:30 am - 6:00 pm
ONT
-
BOS
9h 30m
2 stops
$371Southwest
Fri, Jul 10 - Tue, Jul 14

Alaska Airlines flights from Boston to Ontario

Our best Alaska Airlines deals on Boston to Ontario flight tickets
Alaska Airlines
Sep 18
BOS7:12 amBoston Logan Intl
10h 04m
1 stop
ONT2:16 pmOntario
Sep 18
ONT6:14 pmOntario
8h 55m
1 stop
BOS6:09 amBoston Logan Intl
$353
Alaska Airlines
Sep 30
BOS7:12 amBoston Logan Intl
10h 04m
1 stop
ONT2:16 pmOntario
Oct 6
ONT6:54 pmOntario
9h 35m
1 stop
BOS7:29 amBoston Logan Intl
$359
Alaska Airlines
Sep 1
BOS9:33 amBoston Logan Intl
10h 37m
1 stop
ONT5:10 pmOntario
Sep 2
ONT6:05 pmOntario
9h 04m
1 stop
BOS6:09 amBoston Logan Intl
$393

American Airlines flights from Boston to Ontario

Our best American Airlines deals on Boston to Ontario flight tickets
American Airlines
Jul 1
BOS10:48 amBoston Logan Intl
10h 33m
2 stops
ONT6:21 pmOntario
Jul 6
ONT10:10 pmOntario
8h 09m
1 stop
BOS9:19 amBoston Logan Intl
$364
American Airlines
Jul 2
BOS8:01 amBoston Logan Intl
8h 21m
1 stop
ONT1:22 pmOntario
Jul 5
ONT7:15 pmOntario
7h 30m
1 stop
BOS5:45 amBoston Logan Intl
$373
American Airlines
Jun 5
BOS4:06 pmBoston Logan Intl
9h 33m
1 stop
ONT10:39 pmOntario
Jun 9
ONT7:13 pmOntario
10h 28m
2 stops
BOS8:41 amBoston Logan Intl
$383

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 May 27, 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 7/19

6:05 am-12:10 pm

1 stop9h 05m

Ontario

Wed 7/22

6:01 pm-7:35 am

1 stop10h 34m

$338

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/10

5:25 am-1:50 pm

1 stop11h 25m

Ontario

Tue 7/14

11:55 pm-12:15 pm

1 stop9h 20m

$339

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 8/24

5:40 am-10:20 am

1 stop7h 40m

Ontario

Mon 8/31

8:40 pm-9:55 am

2 stops10h 15m

$343

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 7/21

6:05 am-12:10 pm

1 stop9h 05m

Ontario

Mon 7/27

10:00 pm-5:51 pm

2 stops16h 51m

$350

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 8/29

5:40 am-10:20 am

1 stop7h 40m

Ontario

Wed 9/2

8:35 am-9:25 pm

2 stops9h 50m

$352

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 9/18

7:12 am-2:16 pm

1 stop10h 04m

Ontario

Fri 9/18

6:14 pm-6:09 am

1 stop8h 55m

$353

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/30

7:12 am-2:16 pm

1 stop10h 04m

Ontario

Tue 10/6

6:54 pm-7:29 am

1 stop9h 35m

$359

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 7/1

10:48 am-6:21 pm

2 stops10h 33m

Ontario

Mon 7/6

10:10 pm-9:19 am

1 stop8h 09m

$364
Quickest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 9/17

5:40 am-10:20 am

1 stop7h 40m

Ontario

Sat 9/19

9:20 am-9:40 pm

2 stops9h 20m

$368

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 7/10

5:25 am-1:50 pm

1 stop11h 25m

Ontario

Tue 7/14

5:30 am-6:00 pm

2 stops9h 30m

$371

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $473 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 $345 on momondo.

How have Boston to Ontario flight prices changed over time?

As of May 2026, prices for Boston to Ontario flights are approximately 9% more expensive 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

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 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
8,423 reviews
Search Delta flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,749 reviews
Search United Airlines flights
American AirlinesPriceFrom $259Free CancellationRating
7.1
11,639 reviews
Search American Airlines flights
SouthwestPriceFrom $305Free CancellationRating
7.9
4,265 reviews
Search Southwest flights
JetBluePriceFrom $319Free CancellationRating
7.1
2,981 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.

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