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Cheap flights from Ontario to Boston from $97

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.
Southwest Logo
9:45 am - 10:20 pm
ONT
-
BOS
9h 35m
1 stop
Southwest Logo
5:30 am - 10:40 am
BOS
-
ONT
8h 10m
1 stop
$259Southwest
Tue, Feb 17 - Wed, Feb 25
Southwest Logo
9:45 am - 10:20 pm
ONT
-
BOS
9h 35m
1 stop
Southwest Logo
5:30 am - 4:05 pm
BOS
-
ONT
13h 35m
2 stops
$264Southwest
Tue, Feb 17 - Wed, Feb 25
American Airlines Logo
6:00 am - 7:02 pm
ONT
-
BOS
10h 02m
2 stops
American Airlines Logo
9:45 am - 6:20 pm
BOS
-
ONT
11h 35m
2 stops
$270American Airlines
Sat, Feb 7 - Tue, Feb 10
Alaska Airlines Logo
11:53 am - 11:54 pm
ONT
-
BOS
9h 01m
1 stop
Alaska Airlines Logo
7:00 am - 3:08 pm
BOS
-
ONT
11h 08m
1 stop
$278Alaska Airlines
Sat, Jan 31 - Tue, Feb 3
American Airlines Logo
7:30 pm - 5:32 am
ONT
-
BOS
7h 02m
1 stop
American Airlines Logo
2:10 pm - 7:45 pm
BOS
-
ONT
8h 35m
1 stop
$279American Airlines
Thu, Jan 29 - Tue, Feb 17
American Airlines Logo
9:59 am - 10:19 pm
ONT
-
BOS
9h 20m
2 stops
American Airlines Logo
9:45 am - 6:45 pm
BOS
-
ONT
12h 00m
1 stop
$284American Airlines
Wed, Feb 4 - Fri, Feb 6
American Airlines Logo
9:59 am - 10:22 pm
ONT
-
BOS
9h 23m
2 stops
American Airlines Logo
11:21 am - 6:20 pm
BOS
-
ONT
9h 59m
2 stops
$290American Airlines
Wed, Feb 4 - Sun, Feb 8
United Airlines Logo
6:54 pm - 6:17 am
ONT
-
BOS
8h 23m
1 stop
United Airlines Logo
5:30 am - 12:20 pm
BOS
-
ONT
9h 50m
1 stop
$291United Airlines
Mon, May 18 - Sun, May 24
United Airlines Logo
6:30 pm - 5:58 am
ONT
-
BOS
8h 28m
1 stop
United Airlines Logo
3:20 pm - 9:21 pm
BOS
-
ONT
9h 01m
1 stop
$292United Airlines
Wed, Jun 24 - Wed, Jul 8
JetBlue Logo
11:25 pm - 10:38 am
ONT
-
BOS
8h 13m
1 stop
JetBlue Logo
1:00 pm - 10:09 pm
BOS
-
ONT
12h 09m
1 stop
$293JetBlue
Mon, May 18 - Thu, May 28

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Feb 17
ONT8:00 amOntario
10h 31m
1 stop
BOS9:31 pmBoston Logan Intl
Feb 19
BOS11:00 amBoston Logan Intl
9h 41m
1 stop
ONT5:41 pmOntario
$259
United Airlines
Feb 17
ONT8:00 amOntario
10h 31m
1 stop
BOS9:31 pmBoston Logan Intl
Feb 25
BOS6:00 amBoston Logan Intl
9h 43m
2 stops
ONT12:43 pmOntario
$264
United Airlines
Feb 3
ONT5:05 amOntario
10h 27m
2 stops
BOS6:32 pmBoston Logan Intl
Feb 7
BOS7:25 amBoston Logan Intl
8h 22m
1 stop
ONT12:47 pmOntario
$283

American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
Feb 7
ONT6:00 amOntario
10h 02m
2 stops
BOS7:02 pmBoston Logan Intl
Feb 10
BOS9:45 amBoston Logan Intl
11h 35m
2 stops
ONT6:20 pmOntario
$270
American Airlines
Jan 28
ONT12:57 pmOntario
7h 15m
1 stop
BOS11:12 pmBoston Logan Intl
Feb 17
BOS2:10 pmBoston Logan Intl
8h 35m
1 stop
ONT7:45 pmOntario
$278
American Airlines
Jan 29
ONT7:30 pmOntario
7h 02m
1 stop
BOS5:32 amBoston Logan Intl
Feb 17
BOS2:10 pmBoston Logan Intl
8h 35m
1 stop
ONT7:45 pmOntario
$279

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 January 15, 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

Tue 2/17

9:45 am-10:20 pm

1 stop9h 35m

Boston Logan Intl

Wed 2/25

5:30 am-10:40 am

1 stop8h 10m

$259

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/17

9:45 am-10:20 pm

1 stop9h 35m

Boston Logan Intl

Wed 2/25

5:30 am-4:05 pm

2 stops13h 35m

$264

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 2/7

6:00 am-7:02 pm

2 stops10h 02m

Boston Logan Intl

Tue 2/10

9:45 am-6:20 pm

2 stops11h 35m

$270

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 1/31

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Tue 2/3

7:00 am-3:08 pm

1 stop11h 08m

$278

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/29

7:30 pm-5:32 am

1 stop7h 02m

Boston Logan Intl

Tue 2/17

2:10 pm-7:45 pm

1 stop8h 35m

$279

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 2/4

9:59 am-10:19 pm

2 stops9h 20m

Boston Logan Intl

Fri 2/6

9:45 am-6:45 pm

1 stop12h 00m

$284

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 2/4

9:59 am-10:22 pm

2 stops9h 23m

Boston Logan Intl

Sun 2/8

11:21 am-6:20 pm

2 stops9h 59m

$290

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 5/18

6:54 pm-6:17 am

1 stop8h 23m

Boston Logan Intl

Sun 5/24

5:30 am-12:20 pm

1 stop9h 50m

$291

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 6/24

6:30 pm-5:58 am

1 stop8h 28m

Boston Logan Intl

Wed 7/8

3:20 pm-9:21 pm

1 stop9h 01m

$292

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 5/18

11:25 pm-10:38 am

1 stop8h 13m

Boston Logan Intl

Thu 5/28

1:00 pm-10:09 pm

1 stop12h 09m

$293

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 $367. If you aren’t able to travel during the month of February, then book flights to Boston from Ontario during January instead. Flights to Boston in January, while not as cheap as those in February, still average around $369.

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 $387. 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 $476.

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 $348. 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 $449 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 $415 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 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
JetBluePriceFrom $155Free CancellationRating
7.2
2,887 reviews
Search JetBlue flights
DeltaPriceFrom $178Free CancellationRating
7.9
8,049 reviews
Search Delta flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,163 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $278Free CancellationRating
8.0
11,716 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,131 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
8.0
4,258 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
Falmouth
Nashua
Laconia
Brockton
Sturbridge
Everett
Chatham
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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