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$124+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap flight deals from Massachusetts to Ontario

Keep the following information in mind while searching for Massachusetts to Ontario flight deals. Data was last updated septiembre 15, 2025.

Round-trip from

$257
(American Airlines)

One-way from

$127
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$301
From Massachusetts to Ontario
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One-way flight from Massachusetts to Ontario
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Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/75:30 amBOS - ONT
1 stop11h 13mAmerican Airlines
mar. 10/2110:09 amONT - BOS
1 stop8h 16mAmerican Airlines
Deal found 9/13$257
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3012:20 pmBOS - ONT
2 stops14h 30mFrontier
jue. 11/612:05 pmONT - BOS
2 stops16h 47mFrontier
Deal found 9/15$258
This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/47:00 amBOS - ONT
1 stop11h 17mAlaska Airlines
mié. 11/511:59 amONT - BOS
1 stop9h 21mAlaska Airlines
Deal found 9/13$264
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/235:30 amBOS - ONT
1 stop9h 28mAmerican Airlines
mié. 10/2910:57 amONT - BOS
1 stop7h 51mAmerican Airlines
Deal found 9/15$268
This American Airlines deal was found by Cheapflights users on 9/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/41:37 pmBOS - ONT
1 stop10h 30mAmerican Airlines
lun. 12/810:34 pmONT - BOS
1 stop8h 57mAmerican Airlines
Deal found 9/13$277
This Southwest deal was found by Cheapflights users on 9/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/303:50 pmBOS - ONT
1 stop10h 00mSouthwest
vie. 11/72:15 pmONT - BOS
1 stop6h 50mSouthwest
Deal found 9/13$284
This Southwest deal was found by Cheapflights users on 9/14. 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.
vie. 10/313:55 pmBOS - ONT
1 stop8h 10mSouthwest
dom. 11/28:25 pmONT - BOS
2 stops8h 50mSouthwest
Deal found 9/14$288
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/167:00 amBOS - ONT
1 stop11h 21mAlaska Airlines
mar. 1/64:36 pmONT - BOS
1 stop12h 12mAlaska Airlines
Deal found 9/15$291
This Alaska Airlines deal was found by Cheapflights users on 9/13. 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.
jue. 10/307:00 amBOS - ONT
1 stop11h 17mAlaska Airlines
vie. 10/3111:59 amONT - BOS
1 stop9h 21mAlaska Airlines
Deal found 9/13$294
This Delta deal was found by Cheapflights users on 9/12. 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.
mié. 10/11:54 pmALB - ONT
2 stops11h 29mDelta
sáb. 10/411:55 amONT - ALB
1 stop8h 38mDelta
Deal found 9/12$302
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/12:11 pmALB - ONT
1 stop8h 08mDelta
mié. 11/511:36 amONT - ALB
1 stop9h 21mDelta
Deal found 9/13$307
This Delta deal was found by Cheapflights users on 9/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/316:08 amALB - ONT
2 stops10h 53mDelta
dom. 11/210:00 pmONT - ALB
2 stops12h 16mDelta
Deal found 9/13$321

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 septiembre 15, 2025.
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

mar. 1/6

5:12 pm-11:59 pm

1 stop9h 47m

Ontario

mié. 1/21

11:30 am-11:59 pm

1 stop9h 29m

$277

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 3/4

10:00 am-6:17 pm

1 stop11h 17m

Ontario

lun. 3/9

6:55 pm-7:16 am

1 stop9h 21m

$287

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

vie. 10/31

5:00 am-1:10 pm

2 stops11h 10m

Ontario

dom. 11/2

8:25 pm-8:15 am

2 stops8h 50m

$293

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 11/4

7:00 am-3:17 pm

1 stop11h 17m

Ontario

sáb. 11/8

11:59 am-12:20 am

1 stop9h 21m

$296

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 11/1

6:15 am-12:14 pm

1 stop8h 59m

Ontario

sáb. 11/8

6:00 am-4:12 pm

1 stop7h 12m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

sáb. 1/17

1:55 pm-9:14 pm

1 stop10h 19m

Ontario

lun. 1/26

5:05 pm-6:13 am

1 stop10h 08m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

jue. 12/4

5:30 am-10:35 am

1 stop8h 05m

Ontario

dom. 12/7

6:50 am-5:40 pm

1 stop7h 50m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 1/14

5:40 am-11:38 am

1 stop8h 58m

Ontario

vie. 1/23

10:30 pm-10:02 am

1 stop8h 32m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 1/13

1:55 pm-9:14 pm

1 stop10h 19m

Ontario

sáb. 1/24

4:00 pm-6:32 am

1 stop11h 32m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 1/7

5:40 am-11:38 am

1 stop8h 58m

Ontario

mié. 1/21

6:00 am-4:44 pm

1 stop7h 44m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 59 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, August is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $246). Flying from Massachusetts to Ontario in March is currently the most expensive (average of $328). 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.

What is the cheapest time of day to fly from MA to ONT?

Find hourly flight availability from Massachusetts to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 15, 2025.

When flying from Massachusetts to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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, Southwest, and Hawaiian Airlines fly from Massachusetts to Ontario in about 9h 47m. The time it takes to get you to your destination can typically vary by up to 1h 30m. 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 Southwest. According to our data, you can fly for as low as $124. Users have also found prices from $138 and $138 on Hawaiian Airlines and Alaska 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, August is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $246). Flying from Massachusetts to Ontario in March is currently the most expensive (average of $328). 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$437FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$427FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$270Average$335FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$288Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$308Average$452FlexibilityNo cancel feeOn-time63%

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