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Cheap flights from Boston to Los Angeles from $91

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 8/12. 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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Find the cheapest flights from Boston to Los Angeles

Cheap round-trip flights

Southwest Logo
5:40 am - 11:35 amBOS-ONT
8h 55m1 stop
Southwest Logo
12:20 pm - 11:10 pmONT-BOS
7h 50m1 stop
$182Southwest
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Wed, Aug 20 - Wed, Sep 3
Southwest Logo
10:50 am - 5:30 pmBOS-ONT
9h 40m2 stops
Southwest Logo
12:20 pm - 11:10 pmONT-BOS
7h 50m1 stop
$187Southwest
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Wed, Aug 20 - Wed, Sep 3
JetBlue Logo
1:59 pm - 10:10 pmBOS-ONT
11h 11m1 stop
JetBlue Logo
11:59 pm - 12:15 pmONT-BOS
9h 16m1 stop
$279JetBlue
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Wed, Aug 13 - Mon, Aug 25
American Airlines Logo
5:28 am - 11:32 amBOS-ONT
9h 04m2 stops
American Airlines Logo
8:14 am - 9:29 pmONT-BOS
10h 15m2 stops
$285American Airlines
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Wed, Aug 20 - Sat, Aug 30
JetBlue Logo
1:59 pm - 9:59 pmBOS-ONT
11h 00m1 stop
JetBlue Logo
11:59 pm - 12:15 pmONT-BOS
9h 16m1 stop
$288JetBlue
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Wed, Aug 20 - Mon, Aug 25
Alaska Airlines Logo
7:20 am - 2:12 pmBOS-ONT
9h 52m1 stop
Alaska Airlines Logo
5:49 pm - 6:00 amONT-BOS
9h 11m1 stop
$296Alaska Airlines
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Thu, Sep 11 - Mon, Sep 15
American Airlines Logo
3:53 pm - 9:10 pmBOS-ONT
8h 17m1 stop
American Airlines Logo
12:22 pm - 11:48 pmONT-BOS
8h 26m1 stop
$297American Airlines
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Tue, Aug 12 - Wed, Aug 20
Delta Logo
5:35 am - 10:20 amBOS-ONT
7h 45m1 stop
Delta Logo
11:45 am - 11:14 pmONT-BOS
8h 29m1 stop
$298Delta
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Sat, Aug 30 - Sat, Sep 6
Alaska Airlines Logo
4:00 pm - 12:03 amBOS-ONT
11h 03m1 stop
Alaska Airlines Logo
11:30 am - 11:59 pmONT-BOS
9h 29m1 stop
$304Alaska Airlines
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Thu, Sep 4 - Thu, Feb 26
Delta Logo
5:35 am - 10:20 amBOS-ONT
7h 45m1 stop
Delta Logo
11:45 am - 1:21 amONT-BOS
10h 36m1 stop
$305Delta
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Sat, Aug 30 - Sat, Sep 6

JetBlue flights from Boston to Ontario

Our best JetBlue deals on Boston to Ontario flight tickets
JetBlue
Aug 13
BOS1:59 pmBoston Logan Intl
11h 11m
1 stop
ONT10:10 pmOntario
Aug 25
ONT11:59 pmOntario
9h 16m
1 stop
BOS12:15 pmBoston Logan Intl
$279
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JetBlue
Aug 20
BOS1:59 pmBoston Logan Intl
11h 00m
1 stop
ONT9:59 pmOntario
Aug 25
ONT11:59 pmOntario
9h 16m
1 stop
BOS12:15 pmBoston Logan Intl
$288
Find similar
JetBlue
Aug 30
BOS12:30 pmBoston Logan Intl
12h 29m
1 stop
ONT9:59 pmOntario
Sep 6
ONT10:56 pmOntario
7h 48m
1 stop
BOS9:44 amBoston Logan Intl
$291
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American Airlines flights from Boston to Ontario

Our best American Airlines deals on Boston to Ontario flight tickets
American Airlines
Aug 20
BOS5:28 amBoston Logan Intl
9h 04m
2 stops
ONT11:32 amOntario
Aug 30
ONT8:14 amOntario
10h 15m
2 stops
BOS9:29 pmBoston Logan Intl
$285
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American Airlines
Aug 12
BOS3:53 pmBoston Logan Intl
8h 17m
1 stop
ONT9:10 pmOntario
Aug 20
ONT12:22 pmOntario
8h 26m
1 stop
BOS11:48 pmBoston Logan Intl
$297
Find similar
American Airlines
Aug 12
BOS5:28 amBoston Logan Intl
9h 04m
2 stops
ONT11:32 amOntario
Aug 20
ONT12:46 pmOntario
7h 30m
1 stop
BOS11:16 pmBoston Logan Intl
$302
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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 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 $346. If you aren’t able to travel during the month of May, then book flights to Ontario from Boston during January instead. Flights to Ontario in January, while not as cheap as those in May, still average around $350.

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 $434 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 $328 on momondo.

How have Boston to Ontario flight prices changed over time?

As of July 2025, prices for Boston to Ontario flights are approximately 22% 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

Best Price Found

$91

Fastest flight time

7h 45m

Direct flights

None

Airports in Ontario

1 airport
The best one-way flight to Ontario from Boston in the past 72 hours is $91. The best round-trip flight deal from Boston to Ontario found on momondo in the last 72 hours is $182.
The fastest flight from Boston to Ontario takes 7h 45m
There are no direct flights from Boston to Ontario. Popular non-direct route for this connection is Boston Logan Intl Airport - Ontario Airport.
There is 1 airport near Ontario: Ontario (ONT)
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  • 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 45m.

  • 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
JetBluePriceFrom $176Free CancellationRating
7.3
2,910 reviews
Search JetBlue flights
DeltaPriceFrom $198Free CancellationRating
8.0
7,952 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
8,846 reviews
Search United Airlines flights
American AirlinesPriceFrom $299Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,250 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

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