How long is the flight from Boston to Ontario?

Airlines like United Airlines, Alaska Airlines, and Delta fly from Boston to Ontario in about 9h 41m. The time it takes to get you to your destination can typically vary by up to 1h 27m. There are 2559 mi between Boston and Ontario. This flight may include one or multiple stops.

What are the cheapest airlines flying from Boston to Ontario round-trip?

Currently priced at $124, JetBlue will fly you from Boston to Ontario and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $149 and $239, respectively. Users have found that JetBlue is 69% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Boston 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.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

What are the most popular airlines that fly from Boston to Ontario?

Before booking your flight from Boston to Ontario check out the most popular airlines for this route: American Airlines, Southwest or United Airlines.

Most accurate provider : When it comes to deals on Boston-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Ontario flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Boston-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from Boston to Ontario?

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

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

Yes. Cheapflights offers flight deals from Boston 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.

$100+ Flights from Boston to Ontario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Boston to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to Ontario are usually found in January or May, booked 31 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Boston to Ontario

Cheapest flights from Boston to Ontario
Explore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Wed 12/244:30 pmBOS - ONT

1 stop9h 03mDelta

Sun 12/2810:29 pmONT - BOS

1 stop8h 37mDelta

Deal found 12/14

$328

Wed 12/244:30 pmBOS - ONT

1 stop9h 03mDelta

Mon 12/2910:29 pmONT - BOS

1 stop8h 37mDelta

Deal found 12/14

$349

Thu 12/256:10 amBOS - ONT

1 stop9h 19mDelta

Wed 12/317:05 amONT - BOS

1 stop8h 54mDelta

Deal found 12/14

$368

Wed 12/244:30 pmBOS - ONT

1 stop9h 03mDelta

Thu 1/17:05 amONT - BOS

1 stop8h 54mDelta

Deal found 12/14

$379

Tue 12/235:17 pmBOS - ONT

1 stop9h 06mDelta

Sun 12/2810:29 pmONT - BOS

1 stop8h 37mDelta

Deal found 12/14

$422

Fri 12/265:17 pmBOS - ONT

1 stop9h 06mDelta

Sun 12/2811:10 amONT - BOS

1 stop9h 01mDelta

Deal found 12/14

$427

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

Wed 12/319:10 amBOS - ONT

1 stop9h 57mAmerican Airlines

Thu 1/89:59 amONT - BOS

2 stops8h 56mAmerican Airlines

Deal found 12/14

$452

Wed 12/314:30 pmBOS - ONT

1 stop9h 03mDelta

Wed 1/73:30 pmONT - BOS

1 stop12h 20mDelta

Deal found 12/14

$458

Wed 12/317:45 amBOS - ONT

2 stops10h 35mSouthwest

Wed 1/78:55 amONT - BOS

1 stop10h 35mSouthwest

Deal found 12/14

$463

Thu 12/186:10 amBOS - ONT

1 stop9h 24mDelta

Thu 12/257:05 amONT - BOS

1 stop8h 54mDelta

Deal found 12/15

$472

Best flights from Boston to Ontario
Discover carefully curated flight deals from Boston to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Tue 1/136:00 amBOS - ONT

2 stops9h 47mUnited Airlines

Thu 1/156:00 amONT - BOS

1 stop9h 01mUnited Airlines

Deal found 12/15

$242

Wed 1/147:00 amBOS - ONT

1 stop11h 08mAlaska Airlines

Thu 1/2211:53 amONT - BOS

1 stop9h 01mAlaska Airlines

Deal found 12/15

$258

Fri 1/237:15 amBOS - ONT

1 stop9h 41mDelta

Sat 1/2410:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/14

$267

Wed 3/114:30 pmBOS - ONT

1 stop8h 55mUnited Airlines

Wed 3/181:50 pmONT - BOS

1 stop7h 03mUnited Airlines

Deal found 12/15

$259

Sat 1/247:15 amBOS - ONT

1 stop9h 41mDelta

Mon 1/2610:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/14

$267

Fri 2/204:36 pmBOS - ONT

1 stop10h 16mAlaska Airlines

Fri 2/274:02 pmONT - BOS

1 stop11h 52mAlaska Airlines

Deal found 12/15

$298

Sun 2/17:15 amBOS - ONT

1 stop9h 41mDelta

Mon 2/910:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/15

$297

Tue 3/37:15 amBOS - ONT

1 stop9h 39mDelta

Sat 3/73:30 pmONT - BOS

1 stop12h 18mDelta

Deal found 12/15

$297

Sat 2/287:15 amBOS - ONT

1 stop9h 39mDelta

Mon 3/235:09 pmONT - BOS

1 stop10h 01mDelta

Deal found 12/15

$318

Thu 1/83:30 pmBOS - ONT

1 stop8h 35mDelta

Wed 1/1410:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/14

$318

Tue 3/31:37 pmBOS - ONT

1 stop10h 28mDelta

Thu 3/55:00 pmONT - BOS

1 stop10h 00mDelta

Deal found 12/15

$318

Last-minute flights from Boston to Ontario
Discover last-minute flight deals from Boston to Ontario. Data last updated December 16, 2025 and is based on user searches.

Thu 1/15:20 amBOS - ONT

2 stops10h 18mUnited Airlines

Wed 1/76:00 amONT - BOS

2 stops11h 05mUnited Airlines

Deal found 12/14

$285

Thu 1/15:20 amBOS - ONT

2 stops10h 18mUnited Airlines

Thu 1/86:00 amONT - BOS

1 stop10h 51mUnited Airlines

Deal found 12/16

$292

Mon 1/54:15 pmBOS - ONT

1 stop9h 10mUnited Airlines

Sun 1/186:00 amONT - BOS

1 stop9h 01mUnited Airlines

Deal found 12/15

$283

Thu 1/85:30 amBOS - ONT

1 stop8h 10mSouthwest

Wed 1/148:55 amONT - BOS

1 stop10h 35mSouthwest

Deal found 12/14

$264

Tue 1/133:15 pmBOS - ONT

1 stop8h 43mUnited Airlines

Thu 1/156:00 amONT - BOS

1 stop9h 01mUnited Airlines

Deal found 12/15

$237

Wed 1/149:30 amBOS - ONT

2 stops11h 13mUnited Airlines

Wed 1/215:05 amONT - BOS

2 stops10h 52mUnited Airlines

Deal found 12/13

$247

Thu 1/151:50 pmBOS - ONT

1 stop12h 03mUnited Airlines

Tue 1/201:24 pmONT - BOS

1 stop7h 22mUnited Airlines

Deal found 12/15

$278

Sat 1/177:15 amBOS - ONT

1 stop9h 41mDelta

Sun 1/2510:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/15

$288

Fri 1/237:15 amBOS - ONT

1 stop9h 41mDelta

Sat 1/3110:30 pmONT - BOS

1 stop8h 32mDelta

Deal found 12/16

$267

Wed 1/287:00 amBOS - ONT

1 stop11h 08mAlaska Airlines

Sat 1/3111:53 amONT - BOS

1 stop9h 01mAlaska Airlines

Deal found 12/16

$258

One-way flights from Boston to Ontario
Search for one-way flight options from Boston to Ontario. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Tue 2/246:00 amBOS - ONT

2 stops42h 34mFrontier

Deal found 12/15

$100

Wed 2/46:00 amBOS - ONT

2 stops12h 07mFrontier

Deal found 12/16

$118

Thu 1/87:15 amBOS - ONT

1 stop9h 41mDelta

Deal found 12/14

$119

Wed 1/149:30 amBOS - ONT

2 stops11h 50mAmerican Airlines

Deal found 12/16

$124

Tue 1/65:12 pmBOS - ONT

1 stop9h 47mAlaska Airlines

Deal found 12/16

$129

Thu 2/53:25 pmBOS - ONT

1 stop9h 33mUnited Airlines

Deal found 12/14

$130

Tue 2/247:00 amBOS - ONT

3 stops33h 52mMultiple Airlines

Deal found 12/15

$138

Wed 2/46:00 amBOS - ONT

3 stops31h 09mMultiple Airlines

Deal found 12/16

$141

Sat 1/106:10 amBOS - ONT

1 stop9h 06mDelta

Deal found 12/15

$149

Fri 1/95:23 pmBOS - ONT

3 stops41h 13mMultiple Airlines

Deal found 12/14

$156

Thu 1/296:00 amBOS - ONT

3 stops30h 23mMultiple Airlines

Deal found 12/15

$160

Fri 5/13:55 pmBOS - ONT

1 stop9h 14mJetBlue

Deal found 12/15

$164

Find flight deals from Boston to Ontario

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$237 (United Airlines)
One-way from	$100 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$517

Provider with most accurate pricing for Boston Logan Intl-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for Boston Logan Intl-Ontario flights.

Search Deals

From Boston Logan Intl to Ontario

Search Deals

One-way flight from Boston Logan Intl to Ontario

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($33 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 1/13

6:00 am-12:47 pm

2 stops9h 47m

Ontario

Thu 1/15

6:00 am-6:01 pm

1 stop9h 01m

$242

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Thu 1/22

11:53 am-11:54 pm

1 stop9h 01m

$258

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 3/11

4:30 pm-10:25 pm

1 stop8h 55m

Ontario

Wed 3/18

1:50 pm-11:53 pm

1 stop7h 03m

$259

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 1/23

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Sat 1/24

10:30 pm-10:02 am

1 stop8h 32m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 1/24

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Mon 1/26

10:30 pm-10:02 am

1 stop8h 32m

$267

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sun 2/1

7:15 am-1:56 pm

1 stop9h 41m

Ontario

Mon 2/9

10:30 pm-10:02 am

1 stop8h 32m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 3/3

7:15 am-1:54 pm

1 stop9h 39m

Ontario

Sat 3/7

3:30 pm-6:48 am

1 stop12h 18m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 2/20

4:36 pm-11:52 pm

1 stop10h 16m

Ontario

Fri 2/27

4:02 pm-6:54 am

1 stop11h 52m

$298

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 2/28

7:15 am-1:54 pm

1 stop9h 39m

Ontario

Mon 3/23

5:09 pm-6:10 am

1 stop10h 01m

$318

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 1/8

3:30 pm-9:05 pm

1 stop8h 35m

Ontario

Wed 1/14

10:30 pm-10:02 am

1 stop8h 32m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 23 results

Compare providers for flights from Boston to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Ontario in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Boston-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Boston-Ontario flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Boston-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Boston 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 Boston to Ontario

How far ahead should I book a flight from Boston to Ontario?

The price you pay for your flight from Boston to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 31 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Boston to Ontario (average of $115). Flying from Boston 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 BOS to ONT?

Unlike in the evening, when flights are generally more expensive, you can save up to 22% on flights from Boston to Ontario by exploring options for tickets at noon.

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Boston to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

9,092 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,049 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

JetBlue

7.2

Good

2,895 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How long is the flight from Boston to Ontario?
Airlines like United Airlines, Alaska Airlines, and Delta fly from Boston to Ontario in about 9h 41m. The time it takes to get you to your destination can typically vary by up to 1h 27m. There are 2559 mi between Boston and Ontario. This flight may include one or multiple stops.
What are the cheapest airlines flying from Boston to Ontario round-trip?
Currently priced at $124, JetBlue will fly you from Boston to Ontario and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $149 and $239, respectively. Users have found that JetBlue is 69% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Boston 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.
Can I find deals for flights from Boston to Ontario that include hotel bookings?
Yes. In addition to deals on Boston to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Ontario.
Can I find deals for business class flights from Boston to Ontario?
Yes. Cheapflights offers flight deals from Boston 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 Boston to Ontario?
Currently, August is the cheapest month in which you can book a flight from Boston to Ontario (average of $115). Flying from Boston 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Boston to Ontario

Boston to Los Angeles flights

Boston to Las Vegas flights

Boston to San Francisco flights

Boston to San Diego flights

Hartford to Las Vegas flights

Albany to Las Vegas flights

Boston to Palm Springs flights

Hartford to Los Angeles flights

Boston to Santa Ana flights

Boston to Reno flights

Boston to San Jose flights

Boston to Sacramento flights

Hartford to San Francisco flights

Hartford to San Diego flights

Hartford to Palm Springs flights

Boston to Burbank flights

Albany to Los Angeles flights

Hartford to Ontario flights

Boston to Oakland flights

Hartford to Santa Ana flights

Albany to San Francisco flights

Hartford to Reno flights

Boston to Santa Barbara flights

Albany to San Diego flights

Worcester to Las Vegas flights

Boston to San Luis Obispo flights

Boston to Long Beach flights

Albany to Reno flights

Boston to Monterey flights

Albany to Ontario flights

Hartford to San Jose flights

Albany to Burbank flights

Albany to Santa Ana flights

Boston to Fresno flights

Hartford to Sacramento flights

Boston to Medford flights

Hartford to Burbank flights

Albany to Sacramento flights

Hartford to Santa Barbara flights

Albany to Palm Springs flights

Worcester to Los Angeles flights

Boston to Santa Rosa flights

Hartford to San Luis Obispo flights

Albany to Fresno flights

Hartford to Fresno flights

Hartford to Oakland flights

Boston to Redding flights

Boston to Arcata flights

Hartford to Monterey flights

Complete your trip

Ontario car rentals

Los Angeles Airport car rentals

Ontario Airport car rentals

Burbank Bob Hope Airport car rentals

Long Beach Municipal Airport car rentals

Los Angeles car rentals

San Diego car rentals

San Francisco car rentals

San Jose car rentals

Sacramento car rentals

Fresno car rentals

Burbank car rentals

Other flights to Ontario

Top 5 airlines flying from Boston to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$188	Average$421	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$268	Average$416	FlexibilityNo cancel fee	On-time69%
JetBlue	Cheapest$270	Average$339	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$284	Average$365	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$335	Average$461	FlexibilityNo cancel fee	On-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$100+ Cheap flights from Boston to Ontario (BOS - 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Boston Logan Intl to Ontario are usually found in January or May, booked 31 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Boston to Ontario

Cheapest flights from Boston to OntarioExplore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Explore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Find flight deals from Boston to Ontario

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Ontario that are best for you.

Compare providers for flights from Boston to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Ontario in December.

Best time to book a flight from Boston to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Boston with our price prediction graph.

Cheapflights Insights

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

How far ahead should I book a flight from Boston to Ontario?

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

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

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Boston to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

How long is the flight from Boston to Ontario?

What are the cheapest airlines flying from Boston to Ontario round-trip?

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

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

How can I find direct flights from Boston to Ontario?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Boston to Ontario

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Boston to Ontario
Explore the most affordable flight options available from Boston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.