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Ontario

$102+ 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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
May 12 — May 191
Mon 5/12
Mon 5/19
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Ontario are usually found in January or September, booked 82 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Boston to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$203
(American Airlines)

One-way from

$102
(American Airlines)

Popular in

October

Cheapest in

January

Average price

$395
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. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals

Find 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 May 7, 2025.

This American Airlines deal was found by Cheapflights users on 5/6. 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 6/104:10 pmBOS - ONT
1 stop10h 49mAmerican Airlines
Sat 6/147:02 pmONT - BOS
1 stop7h 35mAmerican Airlines
Deal found 5/6$203
This Frontier deal was found by Cheapflights users on 5/6. 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.
Fri 8/1511:55 amBOS - ONT
1 stop10h 19mFrontier
Sun 8/178:09 pmONT - BOS
1 stop11h 48mFrontier
Deal found 5/6$240
This United Airlines deal was found by Cheapflights users on 5/6. 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 5/209:20 amBOS - ONT
1 stop8h 49mUnited Airlines
Sun 5/256:41 pmONT - BOS
1 stop8h 23mUnited Airlines
Deal found 5/6$269
This Hawaiian Airlines deal was found by Cheapflights users on 5/6. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/47:30 amBOS - ONT
1 stop11h 20mHawaiian Airlines
Fri 6/65:55 pmONT - BOS
1 stop9h 15mHawaiian Airlines
Deal found 5/6$271
This JetBlue deal was found by Cheapflights users on 5/5. 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.
Thu 6/53:10 pmBOS - ONT
1 stop9h 01mJetBlue
Tue 6/1010:55 pmONT - BOS
1 stop9h 47mJetBlue
Deal found 5/5$291
This Alaska Airlines deal was found by Cheapflights users on 5/6. 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 5/297:30 amBOS - ONT
1 stop11h 20mAlaska Airlines
Wed 6/411:51 amONT - BOS
1 stop9h 15mAlaska Airlines
Deal found 5/6$292
This Delta deal was found by Cheapflights users on 5/6. 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.
Fri 6/66:47 pmBOS - ONT
1 stop7h 55mDelta
Thu 6/1211:25 amONT - BOS
1 stop9h 50mDelta
Deal found 5/6$297
This Southwest deal was found by Cheapflights users on 5/5. 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.
Fri 6/67:45 amBOS - ONT
1 stop12h 55mSouthwest
Wed 6/119:20 pmONT - BOS
1 stop7h 25mSouthwest
Deal found 5/5$303
This Kissandfly.com deal was found by Cheapflights users on 5/6. 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.
Fri 5/2312:01 pmBOS - ONT
1 stop10h 42mMultiple Airlines
Fri 5/305:55 pmONT - BOS
1 stop9h 15mMultiple Airlines
Deal found 5/6$325

Cheapflights Fare Finder

Customize your flight search to find flights from Boston 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 May 7, 2025.
Use the filters below to find and compare flights from Boston to Ontario that are best for you.

Fly from

Boston

Fly to

Ontario

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 6/10

4:10 pm-11:59 pm

1 stop10h 49m

Ontario

Sat 6/14

7:02 pm-5:37 am

1 stop7h 35m

$203

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 8/15

11:55 am-7:14 pm

1 stop10h 19m

Ontario

Sun 8/17

8:09 pm-10:57 am

1 stop11h 48m

$240

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 5/20

9:20 am-3:09 pm

1 stop8h 49m

Ontario

Sun 5/25

6:41 pm-6:04 am

1 stop8h 23m

$269

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 6/4

7:30 am-3:50 pm

1 stop11h 20m

Ontario

Fri 6/6

5:55 pm-6:10 am

1 stop9h 15m

$271

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 6/5

3:10 pm-9:11 pm

1 stop9h 01m

Ontario

Wed 6/11

10:59 pm-12:07 pm

1 stop10h 08m

$291

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Thu 5/29

7:30 am-3:50 pm

1 stop11h 20m

Ontario

Wed 6/4

11:51 am-12:06 am

1 stop9h 15m

$292

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 6/6

6:47 pm-11:42 pm

1 stop7h 55m

Ontario

Thu 6/12

11:25 am-12:15 am

1 stop9h 50m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 6/6

7:45 am-5:40 pm

1 stop12h 55m

Ontario

Wed 6/11

9:20 pm-7:45 am

1 stop7h 25m

$303

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Fri 5/23

12:01 pm-7:43 pm

1 stop10h 42m

Ontario

Fri 5/30

5:55 pm-6:10 am

1 stop9h 15m

$325

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 6/17

6:52 am-1:50 pm

1 stop9h 58m

$102

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/7

Showing 1-10 of 18 results
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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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy2 starsTrust 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?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Ontario. Price data was last updated on May 2, 2025.

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 82 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 $246). Flying from Boston 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 BOS to ONT?

Find hourly flight availability from Boston 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 May 7, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 23% on flights from Boston to Ontario by exploring options for tickets at noon.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

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.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated May 7, 2025.
Read through reviews of airlines operating flights from Boston to Ontario, such as Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,994 reviews
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,292 reviews
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,944 reviews
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,424 reviews
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,710 reviews
Alaska Airlines
8.0
Very good
9,994 reviews

Entertainment

7.1

Food

7.1

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    Currently priced at $203, American Airlines will fly you from Boston to Ontario and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and United Airlines - these airlines can fly you to your destination from $240 and $269, respectively. Users have found that American Airlines is 54% 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 $102. Users have also found prices from $118 and $123 on Frontier and Hawaiian Airlines, respectively.

  • Where are the most common layover locations when flying from Boston to Ontario?

    Boston to Ontario flights have a layover in Dallas most often.

  • What are some popular things to do or see while on a layover in Dallas?

    Most Dallas visitors opt to spend their time experiencing American Airlines Center, Dallas World Aquarium, and Reunion Tower. American Airlines Center, Dallas World Aquarium and Reunion Tower are located about 15.0 mi, 15.5 mi, and 15.6 mi, respectively from Dallas/Fort Worth if you are interested in checking them out. Travelers can book a car rental at Dallas/Fort Worth for about $60 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Boston to Ontario flights?

    Boston to Ontario flights have a layover in Phoenix least often.

  • 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 $246). Flying from Boston 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 Boston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Boston to Ontario

Discover the top 6 airlines that operate flights from Boston 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 May 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$159Average$261FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$176Average$325FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$302Average$434FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$443FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$306Average$466FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$316Average$481FlexibilityNo cancel feeOn-time69%

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