HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boston

$91+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
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.

The best prices from Ontario to Boston Logan Intl are usually found in August or September, booked 68 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 March 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(Expedia)

One-way from

$91
(Frontier)

Popular in

June

Cheapest in

August

Average price

$506
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. 12% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 3, 2025.

This Expedia deal was found by Cheapflights users on 3/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:47 pmONT - BOS
1 stop14h 20mMultiple Airlines
Wed 5/147:00 amBOS - ONT
1 stop11h 32mMultiple Airlines
Deal found 3/2$254
This JetBlue deal was found by Cheapflights users on 3/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/210:40 pmONT - BOS
1 stop10h 49mJetBlue
Sun 5/412:15 pmBOS - ONT
1 stop12h 10mJetBlue
Deal found 3/2$271
This American Airlines deal was found by Cheapflights users on 3/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/29:47 amONT - BOS
1 stop11h 07mAmerican Airlines
Wed 4/96:25 amBOS - ONT
1 stop14h 55mAmerican Airlines
Deal found 3/3$297
This Delta deal was found by Cheapflights users on 3/2. 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 3/255:30 pmONT - BOS
1 stop10h 56mDelta
Tue 4/111:10 amBOS - ONT
1 stop8h 24mDelta
Deal found 3/2$317
This United Airlines deal was found by Cheapflights users on 3/1. 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.
Wed 4/165:00 amONT - BOS
2 stops11h 28mUnited Airlines
Wed 5/76:05 amBOS - ONT
1 stop9h 19mUnited Airlines
Deal found 3/1$322
This Southwest deal was found by Cheapflights users on 3/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/317:10 pmONT - BOS
2 stops9h 55mSouthwest
Thu 4/35:50 amBOS - ONT
1 stop11h 05mSouthwest
Deal found 3/3$334
This Alaska Airlines deal was found by Cheapflights users on 3/2. 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.
Tue 5/207:20 pmONT - BOS
1 stop9h 00mAlaska Airlines
Sat 5/245:45 pmBOS - ONT
1 stop9h 12mAlaska Airlines
Deal found 3/2$356
This Frontier deal was found by Cheapflights users on 3/1. 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.
Sat 6/147:58 pmONT - BOS
1 stop13h 02mFrontier
Tue 6/171:00 pmBOS - ONT
1 stop8h 58mFrontier
Deal found 3/1$420

Find flights from Ontario to Boston within your budget

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 March 3, 2025.

Fly from

Ontario

Fly to

Boston

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 5/7

6:47 pm-12:07 pm

1 stop14h 20m

Boston Logan Intl

Wed 5/14

7:00 am-3:32 pm

1 stop11h 32m

$254

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/2

10:40 pm-12:29 pm

1 stop10h 49m

Boston Logan Intl

Sun 5/4

12:15 pm-9:25 pm

1 stop12h 10m

$271

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/2

9:47 am-11:54 pm

1 stop11h 07m

Boston Logan Intl

Wed 4/9

6:25 am-6:20 pm

1 stop14h 55m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 3/25

5:30 pm-7:26 am

1 stop10h 56m

Boston Logan Intl

Tue 4/1

11:10 am-4:34 pm

1 stop8h 24m

$317

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/16

5:00 am-7:28 pm

2 stops11h 28m

Boston Logan Intl

Wed 5/7

6:05 am-12:24 pm

1 stop9h 19m

$322

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 3/31

7:10 pm-8:05 am

2 stops9h 55m

Boston Logan Intl

Thu 4/3

5:50 am-1:55 pm

1 stop11h 05m

$334

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 5/20

7:20 pm-7:20 am

1 stop9h 00m

Boston Logan Intl

Sat 5/24

5:45 pm-11:57 pm

1 stop9h 12m

$356

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 5/7

6:47 pm-12:07 pm

1 stop14h 20m

$91

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/2

10:40 pm-9:32 am

1 stop7h 52m

$136

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 4/8

12:50 pm-5:47 am

1 stop13h 57m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Showing 1-10 of 15 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
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.

Travel insights for flights from Ontario to Boston

Get recent, data-driven insights about flights from Ontario to Boston including ideal travel times, pricing trends, and more.

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 February 28, 2025.

Booking 68 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 $218). Flying from Ontario to Boston in July is currently the most expensive (average of $311). 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 March 3, 2025.

It’s optimal to fly from Ontario to Boston in the afternoon. By choosing this option you can save up to 13% 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. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Boston by month

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

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston by month

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

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 March 3, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from Ontario to Boston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,333 reviews
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,710 reviews
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
8,068 reviews
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Hawaiian Airlines
7.9
Good
2,319 reviews
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,679 reviews
Southwest
8.1
Very good
4,333 reviews

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

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

    According to our current data, JetBlue ($271), American Airlines ($297), and Delta ($317) offers the cheapest pricing from Ontario to Boston. JetBlue is priced at 40% lower than the current average price of a flight leaving 3 months from now.

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

    $91 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and American Airlines, with prices starting from $136 and $154, respectively.

  • 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 $218). Flying from Ontario to Boston in July is currently the most expensive (average of $311). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Warwick
Marlborough
Waltham
Brockton
Cambridge
Framingham
Somerville
Chestnut Hill
Seekonk
Randolph
Lowell
West Yarmouth
Woburn
Saco
Sturbridge
Salem
Seabrook
Burlington
Brookline
Fall River

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
Burbank to Boston flights
Santa Ana to Boston flights
Sacramento to Boston flights
San Jose to Boston flights
Las Vegas to Boston flights
Los Angeles to Hartford flights
Oakland to Boston flights
San Francisco to Hartford flights
San Francisco to Albany flights
Ontario to Hartford flights
Los Angeles to Albany flights
Reno to Boston flights
Palm Springs to Boston flights
Long Beach to Boston flights
San Luis Obispo to Boston flights
San Jose to Hartford flights
Fresno to Boston flights
Santa Ana to Hartford flights
Ontario to Albany flights
San Jose to Albany flights
San Francisco to Worcester flights
Burbank to Hartford flights
San Diego to Hartford flights
San Francisco to West Tisbury flights
Las Vegas to Albany flights
Monterey to Boston flights
Oakland to Hartford flights
Santa Barbara to Albany flights
Santa Ana to Albany flights
Los Angeles to West Tisbury flights
Medford to Hartford flights
Bakersfield to Boston flights
Los Angeles to Worcester flights
Medford to Boston flights
Palm Springs to Albany flights
Redding to Boston flights
Las Vegas to Hartford flights
San Diego to Albany flights
Sacramento to Hartford flights
Palm Springs to Hartford flights
San Francisco to Nantucket flights
Santa Barbara to Boston flights
San Francisco to Hyannis flights
Santa Rosa to Boston flights
Monterey to Albany flights
Los Angeles to Nantucket 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 March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$131Average$228FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$135Average$376FlexibilityNo cancel feeOn-time62%
DeltaCheapest$275Average$416FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$461FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$292Average$501FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$292Average$464FlexibilityNo cancel feeOn-time71%
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.