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$126+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
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 March 18, 2026.

This SmartFares deal was found by Cheapflights users on 3/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:00 am
BOS
-
ONT
1 stop10h 32m
Alaska Airlines
Tue 5/510:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13$248
This Kissandfly.com deal was found by Cheapflights users on 3/18. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/259:00 am
BOS
-
ONT
1 stop12h 13m
Multiple Airlines
Wed 4/110:33 am
ONT
-
BOS
1 stop10h 26m
Multiple Airlines
Deal found 3/18$250
This Southwest deal was found by Cheapflights users on 3/15. 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.
Tue 4/147:20 am
BOS
-
ONT
1 stop8h 55m
Southwest
Tue 4/219:55 pm
ONT
-
BOS
1 stop7h 20m
Southwest
Deal found 3/15$251
This Southwest deal was found by Cheapflights users on 3/14. 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.
Tue 4/282:25 pm
BOS
-
ONT
2 stops10h 25m
Southwest
Wed 4/2910:55 am
ONT
-
BOS
2 stops10h 10m
Southwest
Deal found 3/14$261
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 5/67:00 am
BOS
-
ONT
1 stop10h 30m
Alaska Airlines
Mon 5/1110:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/13$266
This Trip.com deal was found by Cheapflights users on 3/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:05 pm
BOS
-
ONT
1 stop9h 43m
Alaska Airlines
Sat 5/910:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/15$267
This Trip.com deal was found by Cheapflights users on 3/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:33 pm
BOS
-
ONT
1 stop10h 26m
Alaska Airlines
Sat 5/910:39 am
ONT
-
BOS
1 stop10h 20m
Alaska Airlines
Deal found 3/16$268
This Southwest deal was found by Cheapflights users on 3/16. 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 5/1312:45 pm
ALB
-
ONT
1 stop10h 50m
Southwest
Mon 5/189:55 pm
ONT
-
ALB
1 stop7h 00m
Southwest
Deal found 3/16$297
This Southwest deal was found by Cheapflights users on 3/17. 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 4/293:15 pm
BDL
-
ONT
1 stop8h 20m
Southwest
Mon 5/49:55 pm
ONT
-
BDL
1 stop7h 15m
Southwest
Deal found 3/17$313
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/84:55 pm
ALB
-
ONT
1 stop8h 36m
United Airlines
Wed 4/226:49 pm
ONT
-
ALB
2 stops12h 24m
United Airlines
Deal found 3/15$322
This Southwest deal was found by Cheapflights users on 3/15. 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.
Tue 4/1412:25 pm
BDL
-
ONT
2 stops9h 30m
Southwest
Tue 4/219:45 pm
ONT
-
BDL
2 stops9h 55m
Southwest
Deal found 3/15$323
This American Airlines deal was found by Cheapflights users on 3/17. 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.
Mon 4/276:43 pm
BDL
-
ONT
1 stop8h 03m
American Airlines
Tue 5/510:26 pm
ONT
-
BDL
1 stop7h 44m
American Airlines
Deal found 3/17$325

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 March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(SmartFares)

One-way from

$126
(Alaska Airlines)

Popular in

April

Cheapest in

January

Average price

$404
Provider with most accurate pricing for Boston Logan Intl-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Los Angeles 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. 6% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 18, 2026.
Use the filters below to find and compare flights from Massachusetts 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

Wed 4/15

6:20 am-1:30 pm

2 stops10h 10m

Ontario

Tue 4/21

1:55 pm-12:05 am

1 stop7h 10m

$256

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 5/5

7:00 am-2:32 pm

1 stop10h 32m

Ontario

Wed 5/6

10:39 am-11:59 pm

1 stop10h 20m

$266

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 5/10

6:10 am-12:19 pm

1 stop9h 09m

Ontario

Sun 5/24

5:55 pm-6:20 am

1 stop9h 25m

$297

HartfordOntario

BDL - ONT

BDLONT

Hartford Bradley Intl

Thu 6/4

5:10 pm-10:25 pm

1 stop8h 15m

Ontario

Tue 6/9

11:55 pm-11:00 am

1 stop8h 05m

$313

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 5/28

3:55 pm-10:34 pm

1 stop9h 39m

Ontario

Mon 6/1

4:57 pm-6:20 am

1 stop10h 23m

$317

HartfordOntario

BDL - ONT

BDLONT

Hartford Bradley Intl

Wed 4/29

3:15 pm-8:35 pm

1 stop8h 20m

Ontario

Sun 5/3

7:40 pm-8:10 am

2 stops9h 30m

$318

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 5/2

5:05 pm-11:48 pm

1 stop9h 43m

Ontario

Mon 5/4

10:39 am-11:59 pm

1 stop10h 20m

$340

HartfordOntario

BDL - ONT

BDLONT

Hartford Bradley Intl

Tue 4/14

2:21 pm-9:00 pm

1 stop9h 39m

Ontario

Tue 4/21

10:15 pm-10:40 am

1 stop9h 25m

$353

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 6/2

6:10 am-12:19 pm

1 stop9h 09m

Ontario

Sat 6/6

1:29 pm-11:58 pm

1 stop7h 29m

$358

HartfordOntario

BDL - ONT

BDLONT

Hartford Bradley Intl

Mon 5/4

6:00 am-11:36 am

1 stop8h 36m

Ontario

Thu 5/7

9:50 am-11:35 pm

2 stops10h 45m

$358

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/14

Showing 1-10 of 56 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $141). Flying from Massachusetts to Ontario in March 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 Southwest, Alaska Airlines, and Delta fly from Massachusetts to Ontario in about 9h 09m. The time it takes to get you to your destination can typically vary by up to 1h 23m. 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, October is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $141). Flying from Massachusetts to Ontario in March 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 March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$148Average$436FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$398FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$259Average$358FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$290Average$392FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$307Average$437FlexibilityNo cancel feeOn-time63%

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