HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boston

$89+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Nov 20 — Nov 271
Thu 11/20
Thu 11/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Boston 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 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 October 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$250
(Southwest)

One-way from

$89
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$399
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 ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 21, 2025.

This Southwest deal was found by Cheapflights users on 10/19. 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.
Thu 12/46:30 amONT - BOS
1 stop12h 05mSouthwest
Sun 12/76:20 pmBOS - ONT
1 stop8h 45mSouthwest
Deal found 10/19$250
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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 11/146:03 pmONT - BOS
1 stop18h 21mAlaska Airlines
Tue 11/187:00 amBOS - ONT
1 stop11h 17mAlaska Airlines
Deal found 10/19$292
This American Airlines deal was found by Cheapflights users on 10/20. 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 11/1110:34 pmONT - BOS
1 stop8h 55mAmerican Airlines
Sat 11/152:30 pmBOS - ONT
1 stop10h 59mAmerican Airlines
Deal found 10/20$293
This Delta deal was found by Cheapflights users on 10/19. 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 11/127:05 amONT - BOS
1 stop8h 12mDelta
Tue 11/185:05 pmBOS - ONT
1 stop8h 59mDelta
Deal found 10/19$297
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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 11/1411:59 amONT - BOS
1 stop9h 21mAlaska Airlines
Wed 11/194:46 pmBOS - ONT
1 stop10h 10mAlaska Airlines
Deal found 10/20$326
This American Airlines deal was found by Cheapflights users on 10/20. 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 11/156:10 amONT - BOS
2 stops9h 50mAmerican Airlines
Tue 11/1811:10 amBOS - ONT
2 stops10h 10mAmerican Airlines
Deal found 10/20$336
This Delta deal was found by Cheapflights users on 10/20. 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 11/1910:25 pmONT - BOS
1 stop8h 10mDelta
Thu 11/2711:15 amBOS - ONT
1 stop11h 27mDelta
Deal found 10/20$338
This Southwest deal was found by Cheapflights users on 10/20. 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.
Wed 12/1711:15 amONT - BOS
1 stop8h 30mSouthwest
Fri 12/196:15 amBOS - ONT
1 stop10h 20mSouthwest
Deal found 10/20$346
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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 11/136:00 amONT - BOS
1 stop15h 20mAlaska Airlines
Tue 11/187:00 amBOS - ONT
1 stop11h 17mAlaska Airlines
Deal found 10/19$348

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 October 21, 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

Fri 11/14

6:03 pm-3:24 pm

1 stop18h 21m

Boston Logan Intl

Tue 11/18

7:00 am-3:17 pm

1 stop11h 17m

$292

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 12/3

6:00 am-4:13 pm

1 stop7h 13m

Boston Logan Intl

Sun 12/7

6:46 pm-11:58 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 11/11

10:25 pm-9:36 am

1 stop8h 11m

Boston Logan Intl

Mon 11/17

6:53 pm-11:52 pm

1 stop7h 59m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/6

10:30 pm-10:02 am

1 stop8h 32m

Boston Logan Intl

Sat 1/10

6:00 am-12:34 pm

1 stop9h 34m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 12/4

1:29 pm-11:41 pm

1 stop7h 12m

Boston Logan Intl

Mon 12/8

6:46 pm-11:58 pm

1 stop8h 12m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 11/12

1:20 pm-11:44 pm

1 stop7h 24m

Boston Logan Intl

Thu 11/20

6:53 pm-11:52 pm

1 stop7h 59m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 11/15

1:20 pm-11:44 pm

1 stop7h 24m

Boston Logan Intl

Wed 11/19

6:53 pm-11:52 pm

1 stop7h 59m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 12/16

1:29 pm-11:41 pm

1 stop7h 12m

Boston Logan Intl

Tue 1/6

10:35 am-4:19 pm

1 stop8h 44m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 11/14

1:29 pm-11:39 pm

1 stop7h 10m

Boston Logan Intl

Tue 11/18

9:20 am-5:34 pm

2 stops11h 14m

$298

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 1/25

11:53 am-11:59 pm

1 stop9h 06m

Boston Logan Intl

Tue 1/27

7:00 am-3:08 pm

1 stop11h 08m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 24 results
1
2
3

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 17, 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 October 21, 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 October 21, 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
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
7,978 reviews
Southwest
8.0
Very good
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
8,991 reviews
Southwest
8.0
Very good
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
11,023 reviews
Southwest
8.0
Very good
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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
2,909 reviews
Southwest
8.0
Very good
4,238 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

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 7h 13m. Alaska Airlines provides one of the quickest options available for as low as $297. 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

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 Ontario to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Boston flights
San Francisco to Boston flights
San Diego to Boston flights
Los Angeles to Hartford flights
San Jose to Boston flights
Las Vegas to Boston flights
Santa Ana to Boston flights
Sacramento to Boston flights
Burbank to Boston flights
Oakland to Boston flights
San Francisco to Hartford flights
Ontario to Hartford flights
San Diego to Hartford flights
Los Angeles to Albany flights
Santa Ana to Hartford flights
Las Vegas to Hartford flights
Burbank to Hartford flights
Reno to Boston flights
San Francisco to Albany flights
Long Beach to Boston flights
Monterey to Boston flights
Sacramento to Hartford flights
Santa Barbara to Boston flights
San Jose to Hartford flights
Fresno to Boston flights
Las Vegas to Albany flights
Santa Ana to Albany flights
Burbank to Albany flights
Palm Springs to Boston flights
San Luis Obispo to Boston flights
San Diego to Albany flights
Ontario to Albany flights
Reno to Hartford flights
Arcata to Boston flights
Long Beach to Hartford flights
Oakland to Hartford flights
Santa Barbara to Hartford flights
Bakersfield to Boston flights
Los Angeles to Worcester flights
San Jose to Albany flights
Medford to Boston flights
Palm Springs to Hartford flights
Oakland to Albany flights
Reno to Albany flights
Fresno to Albany flights
Santa Rosa to Boston flights
Fresno to Hartford flights
San Luis Obispo to Hartford flights
Long Beach to Albany flights

Top 6 airlines flying from Ontario to Boston

Discover the top 6 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 October 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$178Average$355FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$237Average$324FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$266Average$417FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$278Average$366FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$308Average$421FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$311Average$443FlexibilityNo cancel feeOn-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.