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Cheap flights from Ontario to Boston from $123

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 7/12. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Boston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
1:50 pm - 12:05 am
ONT
-
BOS
7h 15m
1 stop
Southwest Logo
9:25 am - 2:25 pm
BOS
-
ONT
8h 00m
1 stop
$216Southwest
Tue, Sep 1 - Wed, Sep 2
Southwest Logo
1:50 pm - 12:05 am
ONT
-
BOS
7h 15m
1 stop
Southwest Logo
2:45 pm - 10:00 pm
BOS
-
ONT
10h 15m
2 stops
$222Southwest
Tue, Sep 1 - Wed, Sep 2
Southwest Logo
8:35 am - 9:25 pm
ONT
-
BOS
9h 50m
2 stops
Southwest Logo
2:45 pm - 10:00 pm
BOS
-
ONT
10h 15m
2 stops
$227Southwest
Tue, Sep 1 - Wed, Sep 2
American Airlines Logo
10:29 am - 10:06 pm
ONT
-
BOS
8h 37m
1 stop
American Airlines Logo
5:51 am - 11:43 am
BOS
-
ONT
8h 52m
1 stop
$253American Airlines
Tue, Aug 18 - Wed, Aug 26
JetBlue Logo
11:51 pm - 2:22 pm
ONT
-
BOS
11h 31m
1 stop
JetBlue Logo
4:30 pm - 10:35 pm
BOS
-
ONT
9h 05m
1 stop
$257JetBlue
Tue, Jul 28 - Wed, Aug 19
JetBlue Logo
11:50 pm - 2:22 pm
ONT
-
BOS
11h 32m
1 stop
JetBlue Logo
4:30 pm - 10:35 pm
BOS
-
ONT
9h 05m
1 stop
$258JetBlue
Fri, Aug 14 - Fri, Aug 21
JetBlue Logo
11:51 pm - 2:22 pm
ONT
-
BOS
11h 31m
1 stop
JetBlue Logo
2:45 pm - 10:35 pm
BOS
-
ONT
10h 50m
1 stop
$259JetBlue
Tue, Jul 28 - Tue, Aug 18
Southwest Logo
11:55 pm - 9:55 am
ONT
-
BOS
7h 00m
1 stop
Southwest Logo
5:40 am - 10:20 am
BOS
-
ONT
7h 40m
1 stop
$260Southwest
Tue, Sep 1 - Sat, Sep 5
JetBlue Logo
11:51 pm - 2:22 pm
ONT
-
BOS
11h 31m
1 stop
JetBlue Logo
2:45 pm - 10:35 pm
BOS
-
ONT
10h 50m
1 stop
$261JetBlue
Tue, Jul 28 - Tue, Aug 18
Southwest Logo
10:00 am - 10:20 pm
ONT
-
BOS
9h 20m
1 stop
Southwest Logo
2:45 pm - 10:00 pm
BOS
-
ONT
10h 15m
2 stops
$263Southwest
Fri, Aug 28 - Tue, Sep 1

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Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Sep 1
ONT1:50 pmOntario
7h 15m
1 stop
BOS12:05 amBoston Logan Intl
Sep 2
BOS9:25 amBoston Logan Intl
8h 00m
1 stop
ONT2:25 pmOntario
$216
Southwest
Sep 1
ONT1:50 pmOntario
7h 15m
1 stop
BOS12:05 amBoston Logan Intl
Sep 2
BOS2:45 pmBoston Logan Intl
10h 15m
2 stops
ONT10:00 pmOntario
$222
Southwest
Sep 1
ONT8:35 amOntario
9h 50m
2 stops
BOS9:25 pmBoston Logan Intl
Sep 2
BOS2:45 pmBoston Logan Intl
10h 15m
2 stops
ONT10:00 pmOntario
$227

JetBlue flights from Ontario to Boston

Our best JetBlue deals on Ontario to Boston flight tickets
JetBlue
Jul 28
ONT11:51 pmOntario
11h 31m
1 stop
BOS2:22 pmBoston Logan Intl
Aug 19
BOS4:30 pmBoston Logan Intl
9h 05m
1 stop
ONT10:35 pmOntario
$257
JetBlue
Aug 14
ONT11:50 pmOntario
11h 32m
1 stop
BOS2:22 pmBoston Logan Intl
Aug 21
BOS4:30 pmBoston Logan Intl
9h 05m
1 stop
ONT10:35 pmOntario
$258
JetBlue
Jul 28
ONT11:51 pmOntario
11h 31m
1 stop
BOS2:22 pmBoston Logan Intl
Aug 18
BOS2:45 pmBoston Logan Intl
10h 50m
1 stop
ONT10:35 pmOntario
$259

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 June 9, 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

Tue 9/1

1:50 pm-12:05 am

1 stop7h 15m

Boston Logan Intl

Wed 9/2

9:25 am-2:25 pm

1 stop8h 00m

$216

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

1:50 pm-12:05 am

1 stop7h 15m

Boston Logan Intl

Wed 9/2

2:45 pm-10:00 pm

2 stops10h 15m

$222

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

8:35 am-9:25 pm

2 stops9h 50m

Boston Logan Intl

Wed 9/2

2:45 pm-10:00 pm

2 stops10h 15m

$227

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 8/18

10:29 am-10:06 pm

1 stop8h 37m

Boston Logan Intl

Wed 8/26

5:51 am-11:43 am

1 stop8h 52m

$253

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/28

11:51 pm-2:22 pm

1 stop11h 31m

Boston Logan Intl

Wed 8/19

4:30 pm-10:35 pm

1 stop9h 05m

$257

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/14

11:50 pm-2:22 pm

1 stop11h 32m

Boston Logan Intl

Fri 8/21

4:30 pm-10:35 pm

1 stop9h 05m

$258

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/28

11:51 pm-2:22 pm

1 stop11h 31m

Boston Logan Intl

Tue 8/18

2:45 pm-10:35 pm

1 stop10h 50m

$259
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

11:55 pm-9:55 am

1 stop7h 00m

Boston Logan Intl

Sat 9/5

5:40 am-10:20 am

1 stop7h 40m

$260

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/28

11:51 pm-2:22 pm

1 stop11h 31m

Boston Logan Intl

Tue 8/18

2:45 pm-10:35 pm

1 stop10h 50m

$261

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/28

10:00 am-10:20 pm

1 stop9h 20m

Boston Logan Intl

Tue 9/1

2:45 pm-10:00 pm

2 stops10h 15m

$263

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 typical price of a round-trip flight between Ontario and Boston?

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 $399. 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 $374. 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 from Ontario 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 $395 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 $336 on momondo.

How have Ontario to Boston flight prices changed over time?

As of June 2026, prices for Ontario to Boston flights are approximately 15% 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 26m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 26m
There are no direct flights from Ontario to Boston. There are no popular flight routes from Ontario to Boston.
Search flight deals

Frequently asked questions about flying from Ontario to Boston

  • 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 26m, 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 $158Free CancellationRating
7.9
8,395 reviews
Search Delta flights
JetBluePriceFrom $209Free CancellationRating
7.1
2,978 reviews
Search JetBlue flights
United AirlinesPriceFrom $242Free CancellationRating
7.4
9,785 reviews
Search United Airlines flights
SouthwestPriceFrom $294Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,642 reviews
Search American Airlines 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
Cambridge
Plymouth
South Yarmouth
Gloucester
Narragansett
Revere
Brockton
Warwick
Falmouth
Chatham
Laconia
Sturbridge
Dennis Port

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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