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Cheap flights from Ontario to Boston from $99

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 2/24. 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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Find the cheapest flights from Ontario to Boston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
3:30 pm - 6:50 am
ONT
-
BOS
12h 20m1 stop
Delta Logo
7:15 am - 1:56 pm
BOS
-
ONT
9h 41m1 stop
$237Delta
Sat, Jan 24 - Wed, Jan 28
American Airlines Logo
12:57 pm - 11:12 pm
ONT
-
BOS
7h 15m1 stop
American Airlines Logo
11:10 am - 6:20 pm
BOS
-
ONT
10h 10m2 stops
$242American Airlines
Tue, Jan 6 - Tue, Jan 13
American Airlines Logo
9:59 am - 10:19 pm
ONT
-
BOS
9h 20m2 stops
American Airlines Logo
11:10 am - 6:20 pm
BOS
-
ONT
10h 10m2 stops
$247American Airlines
Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
6:54 pm - 8:23 am
ONT
-
BOS
10h 29m1 stop
United Airlines Logo
4:25 pm - 10:26 pm
BOS
-
ONT
9h 01m1 stop
$254United Airlines
Tue, May 12 - Tue, May 19
Alaska Airlines Logo
11:53 am - 11:54 pm
ONT
-
BOS
9h 01m1 stop
Alaska Airlines Logo
4:36 pm - 11:52 pm
BOS
-
ONT
10h 16m1 stop
$258Alaska Airlines
Tue, Jan 27 - Wed, Feb 18
United Airlines Logo
1:34 pm - 11:53 pm
ONT
-
BOS
7h 19m1 stop
United Airlines Logo
4:25 pm - 10:26 pm
BOS
-
ONT
9h 01m1 stop
$259United Airlines
Wed, Apr 29 - Sat, May 9
Southwest Logo
5:45 pm - 8:50 am
ONT
-
BOS
12h 05m2 stops
Southwest Logo
5:30 am - 10:40 am
BOS
-
ONT
8h 10m1 stop
$264Southwest
Tue, Feb 24 - Tue, Mar 3
Delta Logo
10:30 pm - 10:02 am
ONT
-
BOS
8h 32m1 stop
Delta Logo
7:15 am - 1:56 pm
BOS
-
ONT
9h 41m1 stop
$267Delta
Mon, Jan 26 - Thu, Jan 29
American Airlines Logo
12:57 pm - 11:12 pm
ONT
-
BOS
7h 15m1 stop
American Airlines Logo
9:45 am - 6:20 pm
BOS
-
ONT
11h 35m2 stops
$272American Airlines
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
1:24 pm - 11:46 pm
ONT
-
BOS
7h 22m1 stop
United Airlines Logo
10:30 am - 8:58 pm
BOS
-
ONT
13h 28m2 stops
$278United Airlines
Tue, Jan 20 - Sun, Jan 25

Delta flights from Ontario to Boston

Our best Delta deals on Ontario to Boston flight tickets
Delta
Jan 24
ONT3:30 pmOntario
12h 20m
1 stop
BOS6:50 amBoston Logan Intl
Jan 29
BOS7:15 amBoston Logan Intl
9h 41m
1 stop
ONT1:56 pmOntario
$237
Find similar
Delta
Jan 26
ONT10:30 pmOntario
8h 32m
1 stop
BOS10:02 amBoston Logan Intl
Jan 29
BOS7:15 amBoston Logan Intl
9h 41m
1 stop
ONT1:56 pmOntario
$267
Find similar
Delta
Mar 17
ONT10:30 pmOntario
8h 30m
1 stop
BOS10:00 amBoston Logan Intl
Mar 24
BOS6:44 pmBoston Logan Intl
8h 10m
1 stop
ONT11:54 pmOntario
$297
Find similar

American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
Jan 6
ONT12:57 pmOntario
7h 15m
1 stop
BOS11:12 pmBoston Logan Intl
Jan 13
BOS11:10 amBoston Logan Intl
10h 10m
2 stops
ONT6:20 pmOntario
$242
Find similar
American Airlines
Jan 16
ONT9:59 amOntario
9h 20m
2 stops
BOS10:19 pmBoston Logan Intl
Jan 20
BOS11:10 amBoston Logan Intl
10h 10m
2 stops
ONT6:20 pmOntario
$247
Find similar
American Airlines
Jan 6
ONT12:57 pmOntario
7h 15m
1 stop
BOS11:12 pmBoston Logan Intl
Jan 13
BOS9:45 amBoston Logan Intl
11h 35m
2 stops
ONT6:20 pmOntario
$272
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 December 18, 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

Sat 1/24

3:30 pm-6:50 am

1 stop12h 20m

Boston Logan Intl

Wed 1/28

7:15 am-1:56 pm

1 stop9h 41m

$237

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/6

12:57 pm-11:12 pm

1 stop7h 15m

Boston Logan Intl

Tue 1/13

11:10 am-6:20 pm

2 stops10h 10m

$242

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 1/16

9:59 am-10:19 pm

2 stops9h 20m

Boston Logan Intl

Tue 1/20

11:10 am-6:20 pm

2 stops10h 10m

$247

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 5/12

6:54 pm-8:23 am

1 stop10h 29m

Boston Logan Intl

Tue 5/19

4:25 pm-10:26 pm

1 stop9h 01m

$254

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/27

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 2/18

4:36 pm-11:52 pm

1 stop10h 16m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/29

1:34 pm-11:53 pm

1 stop7h 19m

Boston Logan Intl

Sat 5/9

4:25 pm-10:26 pm

1 stop9h 01m

$259

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/24

5:45 pm-8:50 am

2 stops12h 05m

Boston Logan Intl

Tue 3/3

5:30 am-10:40 am

1 stop8h 10m

$264

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 1/26

10:30 pm-10:02 am

1 stop8h 32m

Boston Logan Intl

Thu 1/29

7:15 am-1:56 pm

1 stop9h 41m

$267

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/6

12:57 pm-11:12 pm

1 stop7h 15m

Boston Logan Intl

Tue 1/13

9:45 am-6:20 pm

2 stops11h 35m

$272

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/20

1:24 pm-11:46 pm

1 stop7h 22m

Boston Logan Intl

Sun 1/25

10:30 am-8:58 pm

2 stops13h 28m

$278

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 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 $390. 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 $489.

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 $346. 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 $456 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 $419 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 $363 on momondo.

How have Ontario to Boston flight prices changed over time?

As of December 2025, prices for Ontario to Boston flights are approximately 14% 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

Fastest flight time

7h 20m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 20m
There are no direct flights from Ontario to Boston. There are no popular flight routes from Ontario to Boston.
Search flight deals

  • 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 20m, 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
8,009 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $278Free CancellationRating
8.0
11,479 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $301Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
7.9
4,251 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
South Yarmouth
Cambridge
Narragansett
Gloucester
Nashua
Falmouth
Laconia
Brockton
Concord
Sturbridge
Everett
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.

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