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Ontario

$86+ Cheap flights from Massachusetts to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Massachusetts to Ontario

Cheapest flights from Massachusetts to Ontario
Explore the most affordable flight options available from Massachusetts to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:30 am
BOS
-
ONT
1 stop9h 44m
United Airlines
Wed 4/86:49 pm
ONT
-
BOS
1 stop10h 35m
United Airlines
Deal found 1/29$254
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/204:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Wed 2/2512:02 pm
ONT
-
BOS
1 stop8h 57m
Alaska Airlines
Deal found 1/28$259
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
BOS
-
ONT
1 stop9h 38m
United Airlines
Tue 3/1011:59 pm
ONT
-
BOS
2 stops9h 57m
United Airlines
Deal found 1/27$264
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
BOS
-
ONT
2 stops10h 49m
American Airlines
Tue 3/1011:58 pm
ONT
-
BOS
2 stops9h 18m
American Airlines
Deal found 1/27$269
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:00 am
BOS
-
ONT
1 stop11h 08m
Alaska Airlines
Fri 2/274:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Deal found 1/28$276
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 am
BOS
-
ONT
1 stop11h 08m
Alaska Airlines
Tue 3/174:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Deal found 1/28$278
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:00 am
BOS
-
ONT
1 stop9h 22m
United Airlines
Mon 5/46:59 pm
ONT
-
BOS
1 stop10h 24m
United Airlines
Deal found 1/27$288
This JetBlue deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/152:55 pm
BOS
-
ONT
1 stop10h 14m
JetBlue
Mon 5/1811:25 pm
ONT
-
BOS
1 stop8h 13m
JetBlue
Deal found 1/28$293
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
BOS
-
ONT
2 stops9h 43m
United Airlines
Wed 3/45:00 am
ONT
-
BOS
2 stops10h 41m
United Airlines
Deal found 1/27$294
This Delta deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:37 pm
BOS
-
ONT
1 stop8h 12m
Delta
Mon 3/910:25 pm
ONT
-
BOS
1 stop8h 39m
Delta
Deal found 1/27$297
This Southwest deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:50 am
BOS
-
ONT
1 stop10h 45m
Southwest
Wed 3/410:40 am
ONT
-
BOS
2 stops8h 50m
Southwest
Deal found 1/27$298
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/264:36 pm
BOS
-
ONT
1 stop10h 16m
Alaska Airlines
Tue 3/312:02 pm
ONT
-
BOS
1 stop8h 57m
Alaska Airlines
Deal found 1/27$299

Find flight deals from Massachusetts to Ontario

Keep the following information in mind while searching for Massachusetts to Ontario flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(United Airlines)

One-way from

$86
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$282
Provider with most accurate pricing for Boston Logan Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Los Angeles flights.
Search Deals
From Massachusetts to Ontario
Search Deals
One-way flight from Massachusetts to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Massachusetts 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Massachusetts to Ontario that are best for you.

Fly from

Massachusetts

Fly to

Ontario

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 3/5

4:36 pm-11:52 pm

1 stop10h 16m

Ontario

Wed 3/11

4:02 pm-6:54 am

1 stop11h 52m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 3/3

9:02 am-10:44 pm

1 stop16h 42m

Ontario

Tue 3/10

12:02 pm-11:59 pm

1 stop8h 57m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 3/9

4:30 pm-10:18 pm

1 stop8h 48m

Ontario

Mon 3/16

11:59 pm-12:56 pm

2 stops9h 57m

$264

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 3/9

6:44 pm-11:51 pm

1 stop8h 07m

Ontario

Sat 3/14

5:53 pm-6:49 am

1 stop9h 56m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 2/26

7:15 am-1:54 pm

1 stop9h 39m

Ontario

Tue 3/3

1:15 pm-1:09 am

1 stop8h 54m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 4/24

3:00 pm-9:00 pm

1 stop9h 00m

Ontario

Tue 4/28

10:15 pm-10:38 am

1 stop9h 23m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 3/2

6:37 pm-11:49 pm

1 stop8h 12m

Ontario

Wed 3/4

1:15 pm-1:09 am

1 stop8h 54m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/25

6:50 am-2:35 pm

1 stop10h 45m

Ontario

Wed 3/4

10:40 am-10:30 pm

2 stops8h 50m

$298

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 2/24

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Fri 3/6

4:02 pm-6:54 am

1 stop11h 52m

$299

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 3/5

4:36 pm-11:52 pm

1 stop10h 16m

Ontario

Tue 3/10

4:02 pm-6:54 am

1 stop11h 52m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 60 results
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Best time to book a flight from Massachusetts to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Massachusetts with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Massachusetts to Ontario

What is the cheapest month to book a flight from Massachusetts to Ontario?

Currently, February is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $125). Flying from Massachusetts to Ontario in December is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Massachusetts to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Massachusetts?

    Ontario (ONT) is the airport you will fly into if you book a flight from Massachusetts to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • How long is the flight from Massachusetts to Ontario?

    Airlines like Alaska Airlines, United Airlines, and Delta fly from Massachusetts to Ontario in about 8h 07m. The time it takes to get you to your destination can typically vary by up to 2h 09m. There are 2559 mi between Massachusetts and Ontario. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Massachusetts to Ontario one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $118. Users have also found prices from $129 and $129 on United Airlines and American Airlines, respectively.

  • What are the most popular routes from Massachusetts to Ontario?

    When deciding which route to take from Massachusetts to Ontario consider Boston Logan Intl - Ontario, Hartford Bradley Intl - Ontario or Albany Intl - Ontario as they are the most popular.

  • Can I find deals for flights from Massachusetts to Ontario that include hotel bookings?

    Yes. In addition to deals on Massachusetts to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Massachusetts to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Massachusetts to Ontario.

  • Can I find deals for business class flights from Massachusetts to Ontario?

    Yes. Cheapflights offers flight deals from Massachusetts to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Massachusetts to Ontario?

    Currently, February is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $125). Flying from Massachusetts to Ontario in December is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Massachusetts to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Massachusetts to Ontario

Discover the top 5 airlines that operate flights from Massachusetts to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$149Average$409FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$417FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$270Average$339FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$278Average$365FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$328Average$455FlexibilityNo cancel feeOn-time63%

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