Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Los Angeles from $84

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 1/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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 08m1 stop
Alaska Airlines Logo
11:53 am - 11:54 pm
ONT
-
BOS
9h 01m1 stop
$238Alaska Airlines
Wed, Jan 28 - Wed, Feb 4
Alaska Airlines Logo
5:20 pm - 1:06 pm
BOS
-
ONT
22h 46m1 stop
Alaska Airlines Logo
11:53 am - 11:54 pm
ONT
-
BOS
9h 01m1 stop
$258Alaska Airlines
Mon, Jan 12 - Wed, Jan 21
American Airlines Logo
8:50 am - 4:05 pm
BOS
-
ONT
10h 15m1 stop
American Airlines Logo
12:57 pm - 11:12 pm
ONT
-
BOS
7h 15m1 stop
$259American Airlines
Wed, Jan 7 - Mon, Jan 12
American Airlines Logo
8:05 am - 4:05 pm
BOS
-
ONT
11h 00m2 stops
American Airlines Logo
4:45 pm - 5:32 am
ONT
-
BOS
9h 47m1 stop
$264American Airlines
Wed, Jan 7 - Sun, Jan 11
American Airlines Logo
8:05 am - 2:18 pm
BOS
-
ONT
9h 13m1 stop
American Airlines Logo
6:27 am - 5:00 pm
ONT
-
BOS
7h 33m1 stop
$267American Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
9:30 am - 5:43 pm
BOS
-
ONT
11h 13m2 stops
United Airlines Logo
5:05 am - 6:32 pm
ONT
-
BOS
10h 27m2 stops
$269United Airlines
Mon, Jan 12 - Wed, Jan 21
American Airlines Logo
11:10 am - 6:20 pm
BOS
-
ONT
10h 10m2 stops
American Airlines Logo
12:57 pm - 11:12 pm
ONT
-
BOS
7h 15m1 stop
$273American Airlines
Tue, Jan 20 - Sat, Jan 24
Alaska Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m1 stop
Alaska Airlines Logo
11:53 am - 11:54 pm
ONT
-
BOS
9h 01m1 stop
$277Alaska Airlines
Tue, Jan 27 - Wed, Feb 4
American Airlines Logo
6:00 am - 2:18 pm
BOS
-
ONT
11h 18m2 stops
American Airlines Logo
6:27 am - 6:59 pm
ONT
-
BOS
9h 32m2 stops
$278American Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
3:20 pm - 9:50 pm
BOS
-
ONT
9h 30m1 stop
United Airlines Logo
6:54 pm - 8:23 am
ONT
-
BOS
10h 29m1 stop
$288United Airlines
Fri, May 15 - Mon, May 18

American Airlines flights from Boston to Ontario

Our best American Airlines deals on Boston to Ontario flight tickets
American Airlines
Jan 7
BOS8:50 amBoston Logan Intl
10h 15m
1 stop
ONT4:05 pmOntario
Jan 12
ONT12:57 pmOntario
7h 15m
1 stop
BOS11:12 pmBoston Logan Intl
$259
Find similar
American Airlines
Jan 7
BOS8:05 amBoston Logan Intl
11h 00m
2 stops
ONT4:05 pmOntario
Jan 11
ONT4:45 pmOntario
9h 47m
1 stop
BOS5:32 amBoston Logan Intl
$264
Find similar
American Airlines
Jan 20
BOS8:05 amBoston Logan Intl
9h 13m
1 stop
ONT2:18 pmOntario
Jan 24
ONT6:27 amOntario
7h 33m
1 stop
BOS5:00 pmBoston Logan Intl
$267
Find similar

Southwest flights from Boston to Ontario

Our best Southwest deals on Boston to Ontario flight tickets
Southwest
Jan 5
BOS6:10 amBoston Logan Intl
20h 55m
1 stop
ONT12:05 amOntario
Jan 6
ONT6:50 amOntario
7h 20m
1 stop
BOS5:10 pmBoston Logan Intl
$397
Find similar
Southwest
May 15
BOS5:15 amBoston Logan Intl
9h 55m
2 stops
ONT12:10 pmOntario
May 18
ONT9:55 pmOntario
7h 20m
1 stop
BOS8:15 amBoston Logan Intl
$403
Find similar
Southwest
Dec 16
BOS6:45 amBoston Logan Intl
10h 45m
1 stop
ONT2:30 pmOntario
Dec 22
ONT9:30 amOntario
10h 10m
1 stop
BOS10:40 pmBoston Logan Intl
$508
Find similar

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 December 8, 2025.
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

Wed 1/28

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Wed 2/4

11:53 am-11:54 pm

1 stop9h 01m

$238

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 1/12

5:20 pm-1:06 pm

1 stop22h 46m

Ontario

Wed 1/21

11:53 am-11:54 pm

1 stop9h 01m

$258

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/7

8:50 am-4:05 pm

1 stop10h 15m

Ontario

Mon 1/12

12:57 pm-11:12 pm

1 stop7h 15m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/7

8:05 am-4:05 pm

2 stops11h 00m

Ontario

Sun 1/11

4:45 pm-5:32 am

1 stop9h 47m

$264

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 1/20

8:05 am-2:18 pm

1 stop9h 13m

Ontario

Sat 1/24

6:27 am-5:00 pm

1 stop7h 33m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 1/12

9:30 am-5:43 pm

2 stops11h 13m

Ontario

Wed 1/21

5:05 am-6:32 pm

2 stops10h 27m

$269

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 1/20

11:10 am-6:20 pm

2 stops10h 10m

Ontario

Sat 1/24

12:57 pm-11:12 pm

1 stop7h 15m

$273

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 1/27

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Wed 2/4

11:53 am-11:54 pm

1 stop9h 01m

$277

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 1/20

6:00 am-2:18 pm

2 stops11h 18m

Ontario

Sat 1/24

6:27 am-6:59 pm

2 stops9h 32m

$278

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 5/15

3:20 pm-9:50 pm

1 stop9h 30m

Ontario

Mon 5/18

6:54 pm-8:23 am

1 stop10h 29m

$288

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, January 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 $325. If you aren’t able to travel during the month of January, then book flights to Ontario from Boston during May instead. Flights to Ontario in May, while not as cheap as those in January, still average around $358.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $401. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Ontario for around $569.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from Boston to Ontario when you can find flight prices for as low as $428. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $552 on average. Flights to Ontario from Boston in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $401 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 $296 on momondo.

How have Boston to Ontario flight prices changed over time?

As of December 2025, prices for Boston to Ontario flights are approximately 19% 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 10m

Direct flights

None
The fastest flight from Boston to Ontario takes 8h 10m
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 21m.

  • 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 $188Free CancellationRating
7.9
8,011 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
9,089 reviews
Search United Airlines flights
JetBluePriceFrom $270Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
American AirlinesPriceFrom $284Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
SouthwestPriceFrom $335Free CancellationRating
8.0
4,254 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
Wed 1/7
Wed 1/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States