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Cheap flights from Boston to Los Angeles from $103

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 4/14. 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.
United Airlines Logo
12:30 pm - 6:01 pm
BOS
-
ONT
8h 31m
1 stop
United Airlines Logo
6:59 pm - 8:23 am
ONT
-
BOS
10h 24m
1 stop
$219United Airlines
Sat, May 2 - Wed, May 6
American Airlines Logo
4:06 pm - 10:38 pm
BOS
-
ONT
9h 32m
1 stop
American Airlines Logo
10:00 pm - 9:22 am
ONT
-
BOS
8h 22m
1 stop
$224American Airlines
Sat, May 23 - Wed, May 27
Southwest Logo
4:50 pm - 10:00 pm
BOS
-
ONT
8h 10m
1 stop
Southwest Logo
1:20 pm - 11:50 pm
ONT
-
BOS
7h 30m
1 stop
$243Southwest
Sat, May 2 - Sat, May 9
Southwest Logo
1:50 pm - 9:20 pm
BOS
-
ONT
10h 30m
2 stops
Southwest Logo
1:20 pm - 11:50 pm
ONT
-
BOS
7h 30m
1 stop
$248Southwest
Sat, May 2 - Sat, May 9
Southwest Logo
8:45 am - 3:15 pm
BOS
-
ONT
9h 30m
1 stop
Southwest Logo
11:55 pm - 11:00 am
ONT
-
BOS
8h 05m
1 stop
$257Southwest
Thu, Apr 23 - Tue, Apr 28
Southwest Logo
12:55 pm - 8:35 pm
BOS
-
ONT
10h 40m
1 stop
Southwest Logo
9:55 pm - 8:05 am
ONT
-
BOS
7h 10m
1 stop
$266Southwest
Tue, Apr 14 - Sun, Apr 19
Southwest Logo
7:35 am - 4:20 pm
BOS
-
ONT
11h 45m
1 stop
Southwest Logo
10:55 am - 12:05 am
ONT
-
BOS
10h 10m
2 stops
$268Southwest
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
3:18 pm - 10:36 pm
BOS
-
ONT
10h 18m
1 stop
American Airlines Logo
10:26 pm - 10:01 am
ONT
-
BOS
8h 35m
1 stop
$270American Airlines
Tue, Apr 14 - Sat, Apr 18
Southwest Logo
5:15 am - 12:10 pm
BOS
-
ONT
9h 55m
2 stops
Southwest Logo
9:55 pm - 8:15 am
ONT
-
BOS
7h 20m
1 stop
$272Southwest
Thu, Apr 30 - Tue, May 5
United Airlines Logo
5:00 pm - 10:46 pm
BOS
-
ONT
8h 46m
1 stop
United Airlines Logo
1:18 pm - 11:44 pm
ONT
-
BOS
7h 26m
1 stop
$273United Airlines
Sat, May 23 - Wed, May 27

Delta flights from Boston to Ontario

Our best Delta deals on Boston to Ontario flight tickets
Delta
Apr 24
BOS6:54 pmBoston Logan Intl
7h 50m
1 stop
ONT11:44 pmOntario
Apr 28
ONT5:05 pmOntario
9h 55m
1 stop
BOS6:00 amBoston Logan Intl
$297
Delta
May 8
BOS5:35 amBoston Logan Intl
8h 22m
1 stop
ONT10:57 amOntario
May 10
ONT5:50 pmOntario
10h 45m
1 stop
BOS7:35 amBoston Logan Intl
$303
Delta
May 2
BOS6:15 amBoston Logan Intl
8h 59m
1 stop
ONT12:14 pmOntario
May 6
ONT1:29 pmOntario
7h 28m
1 stop
BOS11:57 pmBoston Logan Intl
$309

Southwest flights from Boston to Ontario

Our best Southwest deals on Boston to Ontario flight tickets
Southwest
May 2
BOS4:50 pmBoston Logan Intl
8h 10m
1 stop
ONT10:00 pmOntario
May 9
ONT1:20 pmOntario
7h 30m
1 stop
BOS11:50 pmBoston Logan Intl
$243
Southwest
May 2
BOS1:50 pmBoston Logan Intl
10h 30m
2 stops
ONT9:20 pmOntario
May 9
ONT1:20 pmOntario
7h 30m
1 stop
BOS11:50 pmBoston Logan Intl
$248
Southwest
Apr 23
BOS8:45 amBoston Logan Intl
9h 30m
1 stop
ONT3:15 pmOntario
Apr 28
ONT11:55 pmOntario
8h 05m
1 stop
BOS11:00 amBoston Logan Intl
$257

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 March 26, 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

Sat 5/2

12:30 pm-6:01 pm

1 stop8h 31m

Ontario

Wed 5/6

6:59 pm-8:23 am

1 stop10h 24m

$219

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/23

4:06 pm-10:38 pm

1 stop9h 32m

Ontario

Wed 5/27

10:00 pm-9:22 am

1 stop8h 22m

$224
Quickest round-trip

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/2

4:50 pm-10:00 pm

1 stop8h 10m

Ontario

Sat 5/9

1:20 pm-11:50 pm

1 stop7h 30m

$243

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/2

1:50 pm-9:20 pm

2 stops10h 30m

Ontario

Sat 5/9

1:20 pm-11:50 pm

1 stop7h 30m

$248

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 4/23

8:45 am-3:15 pm

1 stop9h 30m

Ontario

Tue 4/28

11:55 pm-11:00 am

1 stop8h 05m

$257

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 4/14

12:55 pm-8:35 pm

1 stop10h 40m

Ontario

Sun 4/19

9:55 pm-8:05 am

1 stop7h 10m

$266

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 4/22

7:35 am-4:20 pm

1 stop11h 45m

Ontario

Wed 4/29

10:55 am-12:05 am

2 stops10h 10m

$268

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 4/14

3:18 pm-10:36 pm

1 stop10h 18m

Ontario

Sat 4/18

10:26 pm-10:01 am

1 stop8h 35m

$270

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 4/30

5:15 am-12:10 pm

2 stops9h 55m

Ontario

Tue 5/5

9:55 pm-8:15 am

1 stop7h 20m

$272

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/23

5:00 pm-10:46 pm

1 stop8h 46m

Ontario

Wed 5/27

1:18 pm-11:44 pm

1 stop7h 26m

$273

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 May instead. Flights to Ontario in May, while not as cheap as those in February, still average around $344.

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 $399 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 March 2026, prices for Boston to Ontario flights are approximately 3% 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

7h 50m

Direct flights

None
The fastest flight from Boston to Ontario takes 7h 50m
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 7h 50m.

  • 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
8,331 reviews
Search Delta flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,484 reviews
Search United Airlines flights
American AirlinesPriceFrom $259Free CancellationRating
7.1
11,496 reviews
Search American Airlines flights
JetBluePriceFrom $290Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
SouthwestPriceFrom $297Free CancellationRating
8.0
4,333 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.

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