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Cheap flights from Ontario to Boston from $100

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Boston departing on 1/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

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Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$250Alaska Airlines
Find Deal
Wed, Jan 21 - Thu, Jan 22
American Airlines Logo
12:57 pm - 11:12 pmONT-BOS
7h 15m1 stop
American Airlines Logo
2:11 pm - 10:48 pmBOS-ONT
11h 37m1 stop
$251American Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 14
United Airlines Logo
1:24 pm - 11:46 pmONT-BOS
7h 22m1 stop
United Airlines Logo
10:30 am - 8:58 pmBOS-ONT
13h 28m2 stops
$256United Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 14
United Airlines Logo
1:34 pm - 11:36 pmONT-BOS
7h 02m1 stop
United Airlines Logo
10:56 am - 5:43 pmBOS-ONT
9h 47m1 stop
$261United Airlines
Find Deal
Sat, Dec 13 - Sun, Jan 18
United Airlines Logo
1:34 pm - 11:36 pmONT-BOS
7h 02m1 stop
United Airlines Logo
7:25 am - 5:43 pmBOS-ONT
13h 18m2 stops
$266United Airlines
Find Deal
Sat, Dec 13 - Sun, Jan 18
American Airlines Logo
12:46 pm - 11:00 pmONT-BOS
7h 14m1 stop
American Airlines Logo
9:19 am - 4:02 pmBOS-ONT
9h 43m1 stop
$271American Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$275Alaska Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
United Airlines Logo
6:00 am - 5:43 pmONT-BOS
8h 43m1 stop
United Airlines Logo
9:40 am - 5:37 pmBOS-ONT
10h 57m2 stops
$276United Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Hawaiian Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Hawaiian Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$280Hawaiian Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
American Airlines Logo
9:59 am - 11:00 pmONT-BOS
10h 01m2 stops
American Airlines Logo
8:00 am - 4:02 pmBOS-ONT
11h 02m2 stops
$281American Airlines
Find Deal
Sat, Dec 6 - Fri, Dec 12

Alaska Airlines flights from Ontario to Boston

Our best Alaska Airlines deals on Ontario to Boston flight tickets
Alaska Airlines
Jan 21
ONT11:53 amOntario
9h 01m
1 stop
BOS11:54 pmBoston Logan Intl
Jan 22
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$250
Find similar
Alaska Airlines
Jan 8
ONT11:53 amOntario
9h 01m
1 stop
BOS11:54 pmBoston Logan Intl
Jan 14
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$275
Find similar
Alaska Airlines
Jan 8
ONT11:53 amOntario
9h 01m
1 stop
BOS11:54 pmBoston Logan Intl
Jan 14
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$288
Find similar

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Jan 7
ONT1:24 pmOntario
7h 22m
1 stop
BOS11:46 pmBoston Logan Intl
Jan 14
BOS10:30 amBoston Logan Intl
13h 28m
2 stops
ONT8:58 pmOntario
$256
Find similar
United Airlines
Dec 13
ONT1:34 pmOntario
7h 02m
1 stop
BOS11:36 pmBoston Logan Intl
Jan 18
BOS10:56 amBoston Logan Intl
9h 47m
1 stop
ONT5:43 pmOntario
$261
Find similar
United Airlines
Dec 13
ONT1:34 pmOntario
7h 02m
1 stop
BOS11:36 pmBoston Logan Intl
Jan 18
BOS7:25 amBoston Logan Intl
13h 18m
2 stops
ONT5:43 pmOntario
$266
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 24, 2025.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/21

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Thu 1/22

7:00 am-3:08 pm

1 stop11h 08m

$250

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/7

12:57 pm-11:12 pm

1 stop7h 15m

Boston Logan Intl

Wed 1/14

2:11 pm-10:48 pm

1 stop11h 37m

$251

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/7

1:24 pm-11:46 pm

1 stop7h 22m

Boston Logan Intl

Wed 1/14

10:30 am-8:58 pm

2 stops13h 28m

$256

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/13

1:34 pm-11:36 pm

1 stop7h 02m

Boston Logan Intl

Sun 1/18

10:56 am-5:43 pm

1 stop9h 47m

$261

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/13

1:34 pm-11:36 pm

1 stop7h 02m

Boston Logan Intl

Sun 1/18

7:25 am-5:43 pm

2 stops13h 18m

$266

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/6

12:46 pm-11:00 pm

1 stop7h 14m

Boston Logan Intl

Wed 12/10

9:19 am-4:02 pm

1 stop9h 43m

$271

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

$275

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/6

6:00 am-5:43 pm

1 stop8h 43m

Boston Logan Intl

Wed 12/10

9:40 am-5:37 pm

2 stops10h 57m

$276

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

$280

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 12/6

9:59 am-11:00 pm

2 stops10h 01m

Boston Logan Intl

Fri 12/12

8:00 am-4:02 pm

2 stops11h 02m

$281

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Boston from

How to get the cheapest flight ticket from Ontario to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Boston?

What is the cheapest month to fly to Boston?

In general, September is the cheapest month to fly from Ontario to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $376. If you aren’t able to travel during the month of September, then book flights to Boston from Ontario during August instead. Flights to Boston in August, while not as cheap as those in September, still average around $378.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from Ontario to Boston is on a Tuesday when prices can be found for as low as $396. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $506.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from Ontario to Boston in the afternoon for as low as $352. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $467 per ticket.

How far in advance should I book a flight to Boston?

You are more likely to see cheaper flights to Boston from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $420 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from Ontario for as low as $366 on momondo.

How have Ontario to Boston flight prices changed over time?

As of November 2025, prices for Ontario to Boston flights are approximately 29% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Boston (ONT to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Boston

Direct flights

None
There are no direct flights from Ontario to Boston. There are no popular flight routes from Ontario to Boston.
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  • How far is Ontario to Boston Logan Intl by plane?

    The distance between Ontario and Boston Logan Intl is about 2558.5 mi. Flights usually cover this in 7h 02m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Boston Logan Intl Airport?

    Prices for flights from Ontario Airport to Boston Logan Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Boston Logan Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The required travel and health documents for your Boston Logan Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Boston Logan Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Ontario to Boston?

Best airlines flying from Ontario to Boston

Compare and see reviews for airlines that fly from Ontario to Boston with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $178Free CancellationRating
7.9
7,998 reviews
Search Delta flights
JetBluePriceFrom $237Free CancellationRating
7.2
2,903 reviews
Search JetBlue flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,044 reviews
Search United Airlines flights
American AirlinesPriceFrom $308Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
8.0
4,252 reviews
Search Southwest flights

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Old Orchard Beach
Hampton
York Beach
Plymouth
Kennebunkport
Cambridge
South Yarmouth
Narragansett
Nashua
Gloucester
Falmouth
Laconia
Brockton
Concord
Everett
Sturbridge
Chatham

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Boston?

It is quick and easy to find Ontario to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.

Can I find flights from Ontario to Boston with flexible booking policies on momondo?

momondo does allow users to show only those flights to Boston from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Boston?

momondo provides multiple filters to help you find the best flight to Boston from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Boston right now. Can momondo alert me if prices change?

Price alerts on flights to Boston from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Boston trip

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