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$95+ Cheap flights from Ontario to Boston (ONT - BOS)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Boston Logan Intl are usually found in September or August, booked 24 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Ontario to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boston (BOS). 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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$294
(Cheapflightsfares)

One-way from

$95
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$564
Provider with most accurate pricing for Ontario-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Boston Logan Intl flights.
Search Deals
From Ontario to Boston Logan Intl
Search Deals
One-way flight from Ontario to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($37 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 November 2025
Search Deals

Find flight deals from Ontario to Boston

Cheapest flights from Ontario to Boston
Explore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

This Delta deal was found by Cheapflights users on 11/3. 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.
Thu 12/257:05 amONT - BOS
1 stop8h 54mDelta
Sun 1/115:30 pmBOS - ONT
1 stop8h 08mDelta
Deal found 11/3$297
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/136:00 amONT - BOS
1 stop8h 10mAmerican Airlines
Sun 1/184:52 pmBOS - ONT
1 stop8h 21mAmerican Airlines
Deal found 11/2$300
This Delta deal was found by Cheapflights users on 11/2. 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 12/1212:12 pmONT - BOS
1 stop10h 15mDelta
Sat 1/174:25 pmBOS - ONT
1 stop8h 23mDelta
Deal found 11/2$302
This Alaska Airlines deal was found by Cheapflights users on 11/4. 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.
Fri 12/57:33 pmONT - BOS
1 stop8h 56mAlaska Airlines
Tue 12/99:00 amBOS - ONT
1 stop12h 33mAlaska Airlines
Deal found 11/4$306
This Delta deal was found by Cheapflights users on 11/2. 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.
Wed 12/31:29 pmONT - BOS
1 stop7h 12mDelta
Thu 12/46:10 amBOS - ONT
1 stop9h 24mDelta
Deal found 11/2$307
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/210:34 pmONT - BOS
1 stop8h 57mAmerican Airlines
Tue 12/98:00 amBOS - ONT
2 stops11h 02mAmerican Airlines
Deal found 11/2$312
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 12/256:05 pmONT - BOS
1 stop9h 05mAlaska Airlines
Tue 1/69:08 amBOS - ONT
1 stop12h 17mAlaska Airlines
Deal found 11/2$326
This Delta deal was found by Cheapflights users on 11/2. 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.
Tue 12/24:49 pmONT - BOS
1 stop10h 31mDelta
Fri 12/56:46 pmBOS - ONT
1 stop8h 12mDelta
Deal found 11/2$333
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 12/256:05 pmONT - BOS
1 stop9h 05mAlaska Airlines
Mon 1/55:12 pmBOS - ONT
1 stop9h 47mAlaska Airlines
Deal found 11/2$335
This Delta deal was found by Cheapflights users on 11/2. 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.
Mon 12/221:15 pmONT - BOS
1 stop8h 09mDelta
Wed 1/74:25 pmBOS - ONT
1 stop9h 13mDelta
Deal found 11/2$338

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Boston 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 November 4, 2025.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.

Fly from

Ontario

Fly to

Boston

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 1/24

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Thu 2/5

7:00 am-3:08 pm

1 stop11h 08m

$296

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 2/5

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Mon 2/9

7:00 am-3:08 pm

1 stop11h 08m

$296

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 1/30

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Mon 2/2

7:00 am-3:08 pm

1 stop11h 08m

$296

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 12/4

10:25 pm-10:10 am

1 stop8h 45m

Boston Logan Intl

Fri 12/5

6:46 pm-11:58 pm

1 stop8h 12m

$307

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 1/25

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Tue 2/3

7:00 am-3:08 pm

1 stop11h 08m

$327

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 1/24

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Sat 1/31

7:00 am-3:08 pm

1 stop11h 08m

$327

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 2/18

4:54 pm-6:00 am

1 stop10h 06m

Boston Logan Intl

Sat 2/21

3:30 pm-9:07 pm

1 stop8h 37m

$338

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 1/24

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Fri 1/30

7:00 am-3:08 pm

1 stop11h 08m

$357

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 1/26

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Sat 1/31

7:00 am-3:08 pm

1 stop11h 08m

$357

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 12/7

12:12 pm-11:24 pm

1 stop8h 12m

Boston Logan Intl

Wed 12/10

6:10 am-12:34 pm

1 stop9h 24m

$363

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 23 results
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Compare providers for flights from Ontario to Boston

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 Ontario to Boston in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Ontario-Boston flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Boston 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 Ontario-Boston 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 Ontario to Boston

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boston. Price data was last updated on October 31, 2025.

Booking 24 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Boston (average of $116). Flying from Ontario to Boston in June is currently the most expensive (average of $192). 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 ONT to BOS?

Find hourly flight availability from Ontario to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.

It’s optimal to fly from Ontario to Boston in the afternoon. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Ontario to Boston?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Boston. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Boston flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated November 4, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Ontario to Boston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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
8.0
Very good
4,239 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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.
Delta
7.9
Good
8,003 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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.
United Airlines
7.4
Good
9,002 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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.
American Airlines
7.2
Good
11,040 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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.
JetBlue
7.2
Good
2,908 reviews
Southwest
8.0
Very good
4,239 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Boston. 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 Ontario to Boston?

    A quick flight from Ontario to Boston can take about 8h 45m. Alaska Airlines provides one of the quickest options available for as low as $307. The distance between Ontario and Boston is about 2559 mi. This flight may include one or multiple stops.

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

    According to our current data, Delta ($178), JetBlue ($237), and United Airlines ($266) offers the cheapest pricing from Ontario to Boston. Delta is priced at 57% lower than the current average price of a flight leaving 3 months from now.

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

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

  • How can I find direct flights from Ontario to Boston?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Boston 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 Ontario to Boston?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Boston (average of $116). Flying from Ontario to Boston in June is currently the most expensive (average of $192). 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

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Cambridge
Medford
Hampton Beach
Watertown
Seabrook
Seekonk
Lincoln
Lowell
Smithfield
Cranston
Chestnut Hill
Peabody
Quincy
York Beach
Warwick
Swansea
Old Orchard Beach
Brockton
Waltham
Chelsea

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Top 5 airlines flying from Ontario to Boston

Discover the top 5 airlines that operate flights from Ontario to Boston. 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$178Average$338FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$237Average$321FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$266Average$420FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$308Average$417FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$311Average$443FlexibilityNo cancel feeOn-time63%

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