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Cheap flights from Ontario to Boston from $86

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 3/3. 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.
United Airlines Logo
6:37 pm - 8:13 am
ONT
-
BOS
10h 36m
1 stop
United Airlines Logo
4:30 pm - 10:18 pm
BOS
-
ONT
8h 48m
1 stop
$255United Airlines
mer., mars 11 - lun., mars 16
Alaska Airlines Logo
7:00 am - 3:36 pm
ONT
-
BOS
29h 36m
1 stop
Alaska Airlines Logo
9:02 am - 10:44 pm
BOS
-
ONT
16h 42m
1 stop
$259Alaska Airlines
mer., févr. 18 - mer., févr. 25
American Airlines Logo
11:58 pm - 11:54 am
ONT
-
BOS
8h 56m
1 stop
American Airlines Logo
2:12 pm - 9:24 pm
BOS
-
ONT
10h 12m
1 stop
$260American Airlines
lun., mars 2 - lun., mars 9
American Airlines Logo
11:58 pm - 12:18 pm
ONT
-
BOS
9h 20m
2 stops
American Airlines Logo
4:04 pm - 11:59 pm
BOS
-
ONT
10h 55m
1 stop
$264American Airlines
mar., févr. 17 - dim., févr. 22
American Airlines Logo
6:15 am - 6:09 pm
ONT
-
BOS
8h 54m
2 stops
American Airlines Logo
2:31 pm - 10:07 pm
BOS
-
ONT
10h 36m
2 stops
$269American Airlines
jeu., févr. 19 - lun., févr. 23
United Airlines Logo
6:09 am - 7:49 pm
ONT
-
BOS
10h 40m
2 stops
United Airlines Logo
6:00 am - 12:43 pm
BOS
-
ONT
9h 43m
2 stops
$270United Airlines
mer., févr. 18 - mar., févr. 24
Alaska Airlines Logo
12:02 pm - 11:59 pm
ONT
-
BOS
8h 57m
1 stop
Alaska Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m
1 stop
$276Alaska Airlines
mer., févr. 25 - mer., mars 4
United Airlines Logo
5:00 am - 3:35 pm
ONT
-
BOS
7h 35m
1 stop
United Airlines Logo
3:09 pm - 8:50 pm
BOS
-
ONT
8h 41m
1 stop
$278United Airlines
lun., févr. 16 - jeu., févr. 19
American Airlines Logo
11:58 pm - 12:29 pm
ONT
-
BOS
9h 31m
2 stops
American Airlines Logo
2:12 pm - 9:24 pm
BOS
-
ONT
10h 12m
1 stop
$283American Airlines
lun., févr. 16 - jeu., févr. 19
United Airlines Logo
7:00 am - 7:41 pm
ONT
-
BOS
9h 41m
1 stop
United Airlines Logo
6:00 am - 12:22 pm
BOS
-
ONT
9h 22m
1 stop
$287United Airlines
mar., avr. 28 - sam., mai 16

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Mar 11
ONT6:37 pmOntario
10h 36m
1 stop
BOS8:13 amBoston Logan Intl
Mar 16
BOS4:30 pmBoston Logan Intl
8h 48m
1 stop
ONT10:18 pmOntario
$255
United Airlines
Feb 18
ONT6:09 amOntario
10h 40m
2 stops
BOS7:49 pmBoston Logan Intl
Feb 24
BOS6:00 amBoston Logan Intl
9h 43m
2 stops
ONT12:43 pmOntario
$270
United Airlines
Feb 16
ONT5:00 amOntario
7h 35m
1 stop
BOS3:35 pmBoston Logan Intl
Feb 19
BOS3:09 pmBoston Logan Intl
8h 41m
1 stop
ONT8:50 pmOntario
$278

Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Feb 25
ONT9:00 pmOntario
9h 25m
2 stops
BOS9:25 amBoston Logan Intl
Mar 4
BOS5:30 amBoston Logan Intl
13h 35m
2 stops
ONT4:05 pmOntario
$303
Southwest
Apr 2
ONT2:50 pmOntario
7h 00m
1 stop
BOS12:50 amBoston Logan Intl
Apr 4
BOS5:00 amBoston Logan Intl
8h 05m
1 stop
ONT10:05 amOntario
$327
Southwest
Apr 2
ONT1:10 pmOntario
8h 40m
1 stop
BOS12:50 amBoston Logan Intl
Apr 4
BOS5:25 pmBoston Logan Intl
9h 40m
2 stops
ONT12:05 amOntario
$332

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 janvier 29, 2026.
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

mer. 3/11

6:37 pm-8:13 am

1 stop10h 36m

Boston Logan Intl

lun. 3/16

4:30 pm-10:18 pm

1 stop8h 48m

$255

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mer. 2/18

7:00 am-3:36 pm

1 stop29h 36m

Boston Logan Intl

mer. 2/25

9:02 am-10:44 pm

1 stop16h 42m

$259

OntarioBoston

ONT - BOS

ONTBOS

Ontario

lun. 3/2

11:58 pm-11:54 am

1 stop8h 56m

Boston Logan Intl

lun. 3/9

2:12 pm-9:24 pm

1 stop10h 12m

$260

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mar. 2/17

11:58 pm-12:18 pm

2 stops9h 20m

Boston Logan Intl

dim. 2/22

4:04 pm-11:59 pm

1 stop10h 55m

$264

OntarioBoston

ONT - BOS

ONTBOS

Ontario

jeu. 2/19

6:15 am-6:09 pm

2 stops8h 54m

Boston Logan Intl

lun. 2/23

2:31 pm-10:07 pm

2 stops10h 36m

$269

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mer. 2/18

6:09 am-7:49 pm

2 stops10h 40m

Boston Logan Intl

mar. 2/24

6:00 am-12:43 pm

2 stops9h 43m

$270

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mer. 2/25

12:02 pm-11:59 pm

1 stop8h 57m

Boston Logan Intl

mer. 3/4

7:00 am-3:08 pm

1 stop11h 08m

$276

OntarioBoston

ONT - BOS

ONTBOS

Ontario

lun. 2/16

5:00 am-3:35 pm

1 stop7h 35m

Boston Logan Intl

jeu. 2/19

3:09 pm-8:50 pm

1 stop8h 41m

$278

OntarioBoston

ONT - BOS

ONTBOS

Ontario

lun. 2/16

11:58 pm-12:29 pm

2 stops9h 31m

Boston Logan Intl

jeu. 2/19

2:12 pm-9:24 pm

1 stop10h 12m

$283

OntarioBoston

ONT - BOS

ONTBOS

Ontario

mar. 4/28

7:00 am-7:41 pm

1 stop9h 41m

Boston Logan Intl

sam. 5/16

6:00 am-12:22 pm

1 stop9h 22m

$287

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, February 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 $353. If you aren’t able to travel during the month of February, then book flights to Boston from Ontario during September instead. Flights to Boston in September, while not as cheap as those in February, still average around $376.

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 $386. 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 $474.

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 $351. 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 $446 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 $416 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 January 2026, prices for Ontario to Boston flights are approximately 23% cheaper 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 16m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 16m
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 16m, 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
JetBluePriceFrom $155Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,128 reviews
Search Delta flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $278Free CancellationRating
8.0
11,806 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
8.0
4,267 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
Kennebunkport
Plymouth
South Yarmouth
Cambridge
Narragansett
Gloucester
Falmouth
Nashua
Brockton
Laconia
Sturbridge
Chatham
Warwick
Concord

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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