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Cheap flights from Ontario to Boston from $80

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 1/21. 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.
American Airlines Logo
9:59 am - 8:32 pm
ONT
-
BOS
7h 33m1 stop
American Airlines Logo
6:00 am - 2:18 pm
BOS
-
ONT
11h 18m1 stop
$159American Airlines
Wed, Jan 7 - Wed, Jan 21
American Airlines Logo
9:59 am - 8:32 pm
ONT
-
BOS
7h 33m1 stop
American Airlines Logo
9:45 am - 6:20 pm
BOS
-
ONT
11h 35m2 stops
$164American Airlines
Wed, Jan 7 - Wed, Jan 21
American Airlines Logo
9:59 am - 10:22 pm
ONT
-
BOS
9h 23m2 stops
American Airlines Logo
6:00 am - 2:18 pm
BOS
-
ONT
11h 18m2 stops
$169American Airlines
Wed, Jan 7 - Wed, Jan 21
American Airlines Logo
7:50 pm - 5:34 am
ONT
-
BOS
6h 44m1 stop
American Airlines Logo
4:18 pm - 10:04 pm
BOS
-
ONT
8h 46m1 stop
$175American Airlines
Wed, Feb 18 - Mon, Feb 23
American Airlines Logo
11:59 pm - 11:31 am
ONT
-
BOS
8h 32m1 stop
American Airlines Logo
11:10 am - 6:20 pm
BOS
-
ONT
10h 10m2 stops
$180American Airlines
Mon, Jan 12 - Tue, Jan 20
American Airlines Logo
12:57 pm - 11:12 pm
ONT
-
BOS
7h 15m1 stop
American Airlines Logo
8:05 am - 6:45 pm
BOS
-
ONT
13h 40m1 stop
$190American Airlines
Mon, Jan 12 - Tue, Jan 20
Southwest Logo
6:50 am - 5:10 pm
ONT
-
BOS
7h 20m1 stop
Southwest Logo
5:20 am - 10:40 am
BOS
-
ONT
8h 20m1 stop
$200Southwest
Tue, Feb 10 - Tue, Feb 17
Southwest Logo
7:00 am - 10:05 pm
ONT
-
BOS
12h 05m2 stops
Southwest Logo
5:30 am - 4:05 pm
BOS
-
ONT
13h 35m2 stops
$204Southwest
Wed, Jan 14 - Wed, Feb 11
Southwest Logo
5:45 pm - 8:50 am
ONT
-
BOS
12h 05m2 stops
Southwest Logo
5:20 am - 10:40 am
BOS
-
ONT
8h 20m1 stop
$205Southwest
Tue, Feb 10 - Tue, Feb 17
American Airlines Logo
4:45 pm - 5:32 am
ONT
-
BOS
9h 47m1 stop
American Airlines Logo
9:45 am - 6:45 pm
BOS
-
ONT
12h 00m1 stop
$224American Airlines
Thu, Jan 8 - Sun, Jan 11

American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
Jan 7
ONT9:59 amOntario
7h 33m
1 stop
BOS8:32 pmBoston Logan Intl
Jan 21
BOS6:00 amBoston Logan Intl
11h 18m
1 stop
ONT2:18 pmOntario
$159
Find similar
American Airlines
Jan 7
ONT9:59 amOntario
7h 33m
1 stop
BOS8:32 pmBoston Logan Intl
Jan 21
BOS9:45 amBoston Logan Intl
11h 35m
2 stops
ONT6:20 pmOntario
$164
Find similar
American Airlines
Jan 7
ONT9:59 amOntario
9h 23m
2 stops
BOS10:22 pmBoston Logan Intl
Jan 21
BOS6:00 amBoston Logan Intl
11h 18m
2 stops
ONT2:18 pmOntario
$169
Find similar

Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Feb 10
ONT6:50 amOntario
7h 20m
1 stop
BOS5:10 pmBoston Logan Intl
Feb 17
BOS5:20 amBoston Logan Intl
8h 20m
1 stop
ONT10:40 amOntario
$200
Find similar
Southwest
Jan 14
ONT7:00 amOntario
12h 05m
2 stops
BOS10:05 pmBoston Logan Intl
Feb 11
BOS5:30 amBoston Logan Intl
13h 35m
2 stops
ONT4:05 pmOntario
$204
Find similar
Southwest
Feb 10
ONT5:45 pmOntario
12h 05m
2 stops
BOS8:50 amBoston Logan Intl
Feb 17
BOS5:20 amBoston Logan Intl
8h 20m
1 stop
ONT10:40 amOntario
$205
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 4, 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 1/7

9:59 am-8:32 pm

1 stop7h 33m

Boston Logan Intl

Wed 1/21

6:00 am-2:18 pm

1 stop11h 18m

$159

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/7

9:59 am-8:32 pm

1 stop7h 33m

Boston Logan Intl

Wed 1/21

9:45 am-6:20 pm

2 stops11h 35m

$164

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/7

9:59 am-10:22 pm

2 stops9h 23m

Boston Logan Intl

Wed 1/21

6:00 am-2:18 pm

2 stops11h 18m

$169

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 2/18

7:50 pm-5:34 am

1 stop6h 44m

Boston Logan Intl

Mon 2/23

4:18 pm-10:04 pm

1 stop8h 46m

$175

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 1/12

11:59 pm-11:31 am

1 stop8h 32m

Boston Logan Intl

Tue 1/20

11:10 am-6:20 pm

2 stops10h 10m

$180

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 1/12

12:57 pm-11:12 pm

1 stop7h 15m

Boston Logan Intl

Tue 1/20

8:05 am-6:45 pm

1 stop13h 40m

$190

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/10

6:50 am-5:10 pm

1 stop7h 20m

Boston Logan Intl

Tue 2/17

5:20 am-10:40 am

1 stop8h 20m

$200

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 1/14

7:00 am-10:05 pm

2 stops12h 05m

Boston Logan Intl

Wed 2/11

5:30 am-4:05 pm

2 stops13h 35m

$204

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/10

5:45 pm-8:50 am

2 stops12h 05m

Boston Logan Intl

Tue 2/17

5:20 am-10:40 am

1 stop8h 20m

$205

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

4:45 pm-5:32 am

1 stop9h 47m

Boston Logan Intl

Sun 1/11

9:45 am-6:45 pm

1 stop12h 00m

$224

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 $392. 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 $496.

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 $347. 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 $460 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 December 2025, prices for Ontario to Boston flights are approximately 22% 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 02m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 02m
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 6h 44m, 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
8,011 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,066 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $278Free CancellationRating
8.0
11,402 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $307Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
8.0
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
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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