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$129+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Ontario are usually found in May or January, booked 28 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 junio 12, 2025.

Round-trip from

$257
(United Airlines)

One-way from

$129
(American Airlines)

Popular in

October

Cheapest in

May

Average price

$516
From Boston Logan Intl to Ontario
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One-way flight from Boston Logan Intl to Ontario
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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 7/11:35 pmBOS - ONT
1 stop11h 02mUnited Airlines
vie. 7/41:34 pmONT - BOS
1 stop7h 21mUnited Airlines
Deal found 6/10$257
This American Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 7/25:00 pmBOS - ONT
1 stop7h 38mAmerican Airlines
mié. 7/1612:46 pmONT - BOS
1 stop9h 55mAmerican Airlines
Deal found 6/11$285
This JetBlue deal was found by Cheapflights users on 6/10. 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.
mié. 7/161:59 pmBOS - ONT
1 stop11h 00mJetBlue
lun. 7/2111:59 pmONT - BOS
1 stop9h 16mJetBlue
Deal found 6/10$291
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 8/207:20 amBOS - ONT
1 stop9h 49mAlaska Airlines
mié. 8/2711:39 amONT - BOS
1 stop9h 44mAlaska Airlines
Deal found 6/10$296
This Delta deal was found by Cheapflights users on 6/10. 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.
mar. 8/1212:00 pmBOS - ONT
1 stop10h 11mDelta
mar. 8/2611:45 amONT - BOS
1 stop10h 35mDelta
Deal found 6/10$297
This KAYAK deal was found by Cheapflights users on 6/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/811:55 amBOS - ONT
1 stop10h 19mFrontier
dom. 8/108:09 pmONT - BOS
1 stop11h 49mFrontier
Deal found 6/11$314
This Southwest deal was found by Cheapflights users on 6/11. 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.
mié. 7/210:35 amBOS - ONT
2 stops14h 40mSouthwest
mié. 7/161:00 pmONT - BOS
1 stop7h 55mSouthwest
Deal found 6/11$316

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 junio 12, 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

mar. 7/1

1:35 pm-9:37 pm

1 stop11h 02m

Ontario

vie. 7/4

1:34 pm-11:55 pm

1 stop7h 21m

$257

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 7/2

5:00 pm-9:38 pm

1 stop7h 38m

Ontario

mié. 7/16

12:46 pm-1:41 am

1 stop9h 55m

$285

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 7/16

1:59 pm-9:59 pm

1 stop11h 00m

Ontario

lun. 7/21

11:59 pm-12:15 pm

1 stop9h 16m

$291

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 8/20

7:20 am-2:09 pm

1 stop9h 49m

Ontario

mié. 8/27

11:39 am-12:23 am

1 stop9h 44m

$296

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 8/12

12:00 pm-7:11 pm

1 stop10h 11m

Ontario

mar. 8/26

11:45 am-1:20 am

1 stop10h 35m

$297

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

vie. 8/8

11:55 am-7:14 pm

1 stop10h 19m

Ontario

dom. 8/10

8:09 pm-10:58 am

1 stop11h 49m

$314

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 7/2

10:35 am-10:15 pm

2 stops14h 40m

Ontario

mié. 7/16

1:00 pm-11:55 pm

1 stop7h 55m

$316

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

dom. 8/31

8:29 am-3:32 pm

1 stop10h 03m

$129

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 9/9

4:00 pm-11:59 pm

1 stop10h 59m

$141

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 8/19

7:20 am-2:46 pm

1 stop10h 26m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 16 results
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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 June 9, 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 28 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 junio 12, 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 junio 12, 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
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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 $257, United Airlines will fly you from Boston to Ontario and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and JetBlue - these airlines can fly you to your destination from $285 and $291, respectively. Users have found that United Airlines is 41% 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 $129. Users have also found prices from $141 and $148 on Hawaiian Airlines and Alaska 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 $61 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 5 airlines flying from Boston to Ontario

Discover the top 5 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$176Average$339FlexibilityNo cancel feeOn-time62%
DeltaCheapest$241Average$445FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$482FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$300Average$418FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$306Average$452FlexibilityNo cancel feeOn-time63%

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