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Cheap flights from Ontario to Boston from $126

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 4/15. 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
1 adult, Economy, 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
6:49 pm - 8:24 am
ONT
-
BOS
10h 35m
1 stop
United Airlines Logo
5:30 am - 12:20 pm
BOS
-
ONT
9h 50m
1 stop
$246United Airlines
Sun, Apr 19 - Sat, Apr 25
Southwest Logo
11:55 pm - 10:55 am
ONT
-
BOS
8h 00m
1 stop
Southwest Logo
5:15 am - 9:50 am
BOS
-
ONT
7h 35m
1 stop
$251Southwest
Wed, Apr 29 - Sun, May 3
United Airlines Logo
6:49 pm - 8:24 am
ONT
-
BOS
10h 35m
1 stop
United Airlines Logo
2:37 pm - 10:31 pm
BOS
-
ONT
10h 54m
2 stops
$252United Airlines
Sun, Apr 19 - Sat, Apr 25
Southwest Logo
7:40 pm - 8:05 am
ONT
-
BOS
9h 25m
2 stops
Southwest Logo
5:15 am - 9:55 am
BOS
-
ONT
7h 40m
1 stop
$256Southwest
Sun, May 3 - Fri, May 8
Southwest Logo
7:40 pm - 8:05 am
ONT
-
BOS
9h 25m
2 stops
Southwest Logo
2:30 pm - 11:05 pm
BOS
-
ONT
11h 35m
2 stops
$261Southwest
Sun, May 3 - Fri, May 8
Alaska Airlines Logo
10:33 am - 11:59 pm
ONT
-
BOS
10h 26m
1 stop
Alaska Airlines Logo
7:00 am - 2:32 pm
BOS
-
ONT
10h 32m
1 stop
$266Alaska Airlines
Tue, Apr 7 - Tue, Apr 28
American Airlines Logo
7:35 pm - 9:27 am
ONT
-
BOS
10h 52m
2 stops
American Airlines Logo
3:18 pm - 10:36 pm
BOS
-
ONT
10h 18m
1 stop
$276American Airlines
Fri, May 1 - Tue, May 5
Southwest Logo
9:55 pm - 8:15 am
ONT
-
BOS
7h 20m
1 stop
Southwest Logo
4:50 pm - 10:00 pm
BOS
-
ONT
8h 10m
1 stop
$277Southwest
Mon, Apr 20 - Sat, Apr 25
United Airlines Logo
6:49 pm - 8:24 am
ONT
-
BOS
10h 35m
1 stop
United Airlines Logo
4:35 pm - 10:35 pm
BOS
-
ONT
9h 00m
1 stop
$279United Airlines
Wed, Apr 29 - Mon, May 4
American Airlines Logo
7:35 pm - 9:27 am
ONT
-
BOS
10h 52m
2 stops
American Airlines Logo
11:11 am - 6:24 pm
BOS
-
ONT
10h 13m
2 stops
$281American Airlines
Fri, May 1 - Tue, May 5

American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
May 1
ONT7:35 pmOntario
10h 52m
2 stops
BOS9:27 amBoston Logan Intl
May 5
BOS11:51 amBoston Logan Intl
11h 36m
1 stop
ONT8:27 pmOntario
$276
American Airlines
May 1
ONT7:35 pmOntario
10h 52m
2 stops
BOS9:27 amBoston Logan Intl
May 5
BOS10:18 amBoston Logan Intl
11h 06m
2 stops
ONT6:24 pmOntario
$281
American Airlines
Mar 26
ONT12:22 pmOntario
8h 37m
1 stop
BOS11:59 pmBoston Logan Intl
Mar 31
BOS9:10 amBoston Logan Intl
10h 12m
1 stop
ONT4:22 pmOntario
$292

Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
May 31
ONT9:55 pmOntario
9h 05m
1 stop
BOS10:00 amBoston Logan Intl
Jun 3
BOS9:15 amBoston Logan Intl
10h 05m
1 stop
ONT4:20 pmOntario
$251
Southwest
May 3
ONT7:40 pmOntario
9h 25m
2 stops
BOS8:05 amBoston Logan Intl
May 8
BOS5:15 amBoston Logan Intl
7h 40m
1 stop
ONT9:55 amOntario
$256
Southwest
May 3
ONT7:40 pmOntario
9h 25m
2 stops
BOS8:05 amBoston Logan Intl
May 8
BOS2:30 pmBoston Logan Intl
11h 35m
2 stops
ONT11:05 pmOntario
$261

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 March 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

Cheapest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 4/19

6:49 pm-8:24 am

1 stop10h 35m

Boston Logan Intl

Sat 4/25

5:30 am-12:20 pm

1 stop9h 50m

$246

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/29

11:55 pm-10:55 am

1 stop8h 00m

Boston Logan Intl

Sun 5/3

5:15 am-9:50 am

1 stop7h 35m

$251

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 4/19

6:49 pm-8:24 am

1 stop10h 35m

Boston Logan Intl

Sat 4/25

2:37 pm-10:31 pm

2 stops10h 54m

$252

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 5/3

7:40 pm-8:05 am

2 stops9h 25m

Boston Logan Intl

Fri 5/8

5:15 am-9:55 am

1 stop7h 40m

$256

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 5/3

7:40 pm-8:05 am

2 stops9h 25m

Boston Logan Intl

Fri 5/8

2:30 pm-11:05 pm

2 stops11h 35m

$261

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 4/7

10:33 am-11:59 pm

1 stop10h 26m

Boston Logan Intl

Tue 4/28

7:00 am-2:32 pm

1 stop10h 32m

$266

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/1

7:35 pm-9:27 am

2 stops10h 52m

Boston Logan Intl

Tue 5/5

3:18 pm-10:36 pm

1 stop10h 18m

$276
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 4/20

9:55 pm-8:15 am

1 stop7h 20m

Boston Logan Intl

Sat 4/25

4:50 pm-10:00 pm

1 stop8h 10m

$277

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 4/29

6:49 pm-8:24 am

1 stop10h 35m

Boston Logan Intl

Mon 5/4

4:35 pm-10:35 pm

1 stop9h 00m

$279

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/1

7:35 pm-9:27 am

2 stops10h 52m

Boston Logan Intl

Tue 5/5

11:11 am-6:24 pm

2 stops10h 13m

$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 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 $331. If you aren’t able to travel during the month of February, then book flights to Boston from Ontario during March instead. Flights to Boston in March, while not as cheap as those in February, still average around $357.

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 $481.

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 $353. 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 $405 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 $349 on momondo.

How have Ontario to Boston flight prices changed over time?

As of March 2026, prices for Ontario to Boston flights are approximately 5% 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 10m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 10m
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 10m, 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
2,906 reviews
Search JetBlue flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,292 reviews
Search Delta flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
9,429 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $258Free CancellationRating
7.9
12,050 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $292Free CancellationRating
7.1
11,471 reviews
Search American Airlines flights
SouthwestPriceFrom $297Free CancellationRating
8.0
4,318 reviews
Search Southwest flights

  • United Airlines Flights From Ontario to Boston

    United Airlines is one of the most popular airlines flying from Ontario to Boston, operating 6 flights/week on average for this route. A good United Airlines flight deal for Ontario to Boston starts from $248 round-trip, up to an average price of $410. Our users have rated United Airlines at 7.4/10.

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
Cambridge
South Yarmouth
Narragansett
Gloucester
Falmouth
Brockton
Warwick
Laconia
Chatham
Nashua
Sturbridge
Everett

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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