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$113+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:10 amBOS - ONT
1 stop9h 40mAmerican Airlines
Sat 1/177:16 amONT - BOS
1 stop8h 43mAmerican Airlines
Deal found 12/16$442
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:40 amBOS - ONT
1 stop14h 48mAmerican Airlines
Tue 1/612:57 pmONT - BOS
1 stop7h 15mAmerican Airlines
Deal found 12/16$487
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:17 pmBOS - ONT
1 stop9h 06mDelta
Wed 1/73:30 pmONT - BOS
1 stop12h 20mDelta
Deal found 12/16$488
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:00 amBOS - ONT
1 stop9h 43mUnited Airlines
Wed 1/281:24 pmONT - BOS
1 stop7h 22mUnited Airlines
Deal found 12/16$497
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:04 pmBDL - ONT
2 stops39h 49mMultiple Airlines
Mon 1/56:00 pmONT - BDL
1 stop23h 06mMultiple Airlines
Deal found 12/14$497
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:00 amBOS - ONT
1 stop9h 43mUnited Airlines
Thu 12/255:05 amONT - BOS
1 stop7h 30mUnited Airlines
Deal found 12/16$508
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:46 pmBOS - ONT
1 stop8h 08mDelta
Thu 12/251:15 pmONT - BOS
1 stop8h 09mDelta
Deal found 12/16$518
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:00 amBOS - ONT
1 stop9h 43mUnited Airlines
Mon 1/511:59 pmONT - BOS
1 stop9h 47mUnited Airlines
Deal found 12/16$527
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/203:22 pmBOS - ONT
1 stop9h 30mUnited Airlines
Sat 1/171:24 pmONT - BOS
1 stop7h 28mUnited Airlines
Deal found 12/17$542
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:10 amBDL - ONT
1 stop8h 28mUnited Airlines
Wed 12/3111:59 pmONT - BDL
1 stop7h 37mUnited Airlines
Deal found 12/17$630
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/233:18 pmBDL - ONT
1 stop8h 49mUnited Airlines
Wed 12/241:40 pmONT - BDL
1 stop7h 17mUnited Airlines
Deal found 12/15$649
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:10 amBDL - ONT
2 stops13h 05mMultiple Airlines
Mon 2/23:22 pmONT - BDL
1 stop25h 37mMultiple Airlines
Deal found 12/16$660

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$237
(Delta)

One-way from

$113
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$437
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. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 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

Thu 1/29

1:50 pm-10:53 pm

1 stop12h 03m

Ontario

Fri 1/30

5:05 am-3:37 pm

1 stop7h 32m

$232

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 1/25

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Fri 1/30

3:30 pm-6:53 am

1 stop12h 23m

$237

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 3/11

11:02 am-8:50 pm

2 stops12h 48m

Ontario

Wed 3/18

1:50 pm-11:53 pm

1 stop7h 03m

$264

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 1/10

5:35 am-11:31 am

1 stop8h 56m

Ontario

Sat 1/17

3:30 pm-6:50 am

1 stop12h 20m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 1/26

1:30 pm-9:05 pm

1 stop10h 35m

Ontario

Fri 1/30

3:30 pm-6:53 am

1 stop12h 23m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 1/11

6:10 am-12:16 pm

1 stop9h 06m

Ontario

Sat 1/17

3:30 pm-6:50 am

1 stop12h 20m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 1/26

1:30 pm-9:05 pm

1 stop10h 35m

Ontario

Sat 1/31

3:30 pm-6:50 am

1 stop12h 20m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 1/9

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Fri 1/16

10:30 pm-11:40 am

1 stop10h 10m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 1/22

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Fri 1/30

11:53 am-11:54 pm

1 stop9h 01m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 2/24

3:30 pm-9:05 pm

1 stop8h 35m

Ontario

Fri 2/27

5:00 pm-6:00 am

1 stop10h 00m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 58 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 $123). 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.

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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Massachusetts to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the evening.

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 United Airlines, Delta, and Southwest fly from Massachusetts to Ontario in about 8h 10m. The time it takes to get you to your destination can typically vary by up to 3h 53m. There are 2474 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 American Airlines. According to our data, you can fly for as low as $135. Users have also found prices from $147 and $148 on JetBlue and Southwest, 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 $123). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$188Average$421FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$416FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$270Average$339FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$284Average$365FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$335Average$461FlexibilityNo cancel feeOn-time63%

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