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$114+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Boston Logan Intl are usually found in August or September, booked 39 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 July 31, 2025.

Round-trip from

$266
(lastminute.com)

One-way from

$114
(FlyFar)

Popular in

November

Cheapest in

August

Average price

$433
From Ontario to Boston Logan Intl
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One-way flight from Ontario to Boston Logan Intl
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Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 31, 2025.

This lastminute.com deal was found by Cheapflights users on 7/30. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:56 pmONT - BOS
1 stop7h 38mJetBlue
Tue 9/162:45 pmBOS - ONT
1 stop9h 44mJetBlue
Deal found 7/30$266
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Sun 8/317:32 pmONT - BOS
1 stop7h 41mAmerican Airlines
Thu 9/42:38 pmBOS - ONT
1 stop10h 55mAmerican Airlines
Deal found 7/31$273
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Fri 9/55:49 pmONT - BOS
1 stop9h 11mHawaiian Airlines
Wed 9/107:20 amBOS - ONT
1 stop9h 52mHawaiian Airlines
Deal found 7/29$284
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 9/911:39 amONT - BOS
1 stop9h 48mAlaska Airlines
Fri 9/127:20 amBOS - ONT
1 stop9h 52mAlaska Airlines
Deal found 7/29$294
This Delta deal was found by Cheapflights users on 7/30. 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 9/411:45 amONT - BOS
1 stop10h 39mDelta
Wed 9/101:35 pmBOS - ONT
1 stop8h 36mDelta
Deal found 7/30$295
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 8/307:00 amONT - BOS
1 stop7h 46mUnited Airlines
Sat 9/69:30 amBOS - ONT
2 stops11h 07mUnited Airlines
Deal found 7/31$309
This Southwest deal was found by Cheapflights users on 7/29. 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 8/1510:35 amONT - BOS
1 stop9h 00mSouthwest
Sat 8/238:00 amBOS - ONT
1 stop10h 45mSouthwest
Deal found 7/29$318

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 July 31, 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 9/6

10:56 pm-9:34 am

1 stop7h 38m

Boston Logan Intl

Tue 9/16

2:45 pm-9:29 pm

1 stop9h 44m

$266

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 8/31

7:32 pm-6:13 am

1 stop7h 41m

Boston Logan Intl

Thu 9/4

2:38 pm-10:33 pm

1 stop10h 55m

$273

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 9/5

5:49 pm-6:00 am

1 stop9h 11m

Boston Logan Intl

Wed 9/10

7:20 am-2:12 pm

1 stop9h 52m

$284

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/9

11:39 am-12:27 am

1 stop9h 48m

Boston Logan Intl

Wed 9/17

7:20 am-2:12 pm

1 stop9h 52m

$294

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 9/4

11:45 am-1:24 am

1 stop10h 39m

Boston Logan Intl

Wed 9/10

1:35 pm-7:11 pm

1 stop8h 36m

$295

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 8/30

7:00 am-5:46 pm

1 stop7h 46m

Boston Logan Intl

Sat 9/6

9:30 am-5:37 pm

2 stops11h 07m

$309

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/15

10:35 am-10:35 pm

1 stop9h 00m

Boston Logan Intl

Sat 8/23

8:00 am-3:45 pm

1 stop10h 45m

$318

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 8/5

2:58 pm-11:47 am

2 stops17h 49m

$114

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 8/31

10:29 pm-9:51 am

1 stop8h 22m

$127

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/16

11:39 am-12:27 am

1 stop9h 48m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 15 results
1
2

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 July 25, 2025.

Booking 39 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 July 31, 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.

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 July 31, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 ($266), American Airlines ($273), and Alaska Airlines ($277) offers the cheapest pricing from Ontario to Boston. JetBlue is priced at 35% 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?

    $114 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Alaska Airlines, with prices starting from $127 and $138, 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 Boston?

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

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Top 7 airlines flying from Ontario to Boston

Discover the top 7 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$131Average$328FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$154Average$214FlexibilityNo cancel feeOn-time65%
DeltaCheapest$188Average$371FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$207Average$332FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$287Average$432FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$297Average$418FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$298Average$446FlexibilityNo cancel feeOn-time63%

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