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Cheap flights from Ontario to Boston from $149

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 5/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
7:13 pm - 8:01 am
ONT
-
BOS
9h 48m
1 stop
United Airlines Logo
2:03 pm - 8:04 pm
BOS
-
ONT
9h 01m
1 stop
$292United Airlines
Tue, Sep 8 - Tue, Sep 22
Delta Logo
1:29 pm - 11:58 pm
ONT
-
BOS
7h 29m
1 stop
Delta Logo
6:10 am - 12:19 pm
BOS
-
ONT
9h 09m
1 stop
$297Delta
Thu, May 28 - Mon, Jun 1
American Airlines Logo
7:12 pm - 8:41 am
ONT
-
BOS
10h 29m
2 stops
American Airlines Logo
6:20 am - 12:04 pm
BOS
-
ONT
8h 44m
1 stop
$302American Airlines
Fri, May 29 - Sat, Jun 6
Southwest Logo
2:50 pm - 12:45 am
ONT
-
BOS
6h 55m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$303Southwest
Tue, Jul 14 - Tue, Jul 21
American Airlines Logo
7:12 pm - 8:41 am
ONT
-
BOS
10h 29m
2 stops
American Airlines Logo
11:20 am - 6:22 pm
BOS
-
ONT
10h 02m
2 stops
$307American Airlines
Thu, May 28 - Tue, Jun 2
Alaska Airlines Logo
7:00 am - 6:24 am
ONT
-
BOS
20h 24m
1 stop
Alaska Airlines Logo
7:11 pm - 11:10 am
BOS
-
ONT
18h 59m
1 stop
$309Alaska Airlines
Tue, Jun 2 - Fri, Jun 5
Southwest Logo
9:40 pm - 8:00 am
ONT
-
BOS
7h 20m
1 stop
Southwest Logo
5:00 pm - 10:10 pm
BOS
-
ONT
8h 10m
1 stop
$312Southwest
Tue, Jul 28 - Thu, Aug 13
Southwest Logo
1:50 pm - 12:05 am
ONT
-
BOS
7h 15m
1 stop
Southwest Logo
8:30 am - 6:55 pm
BOS
-
ONT
13h 25m
1 stop
$317Southwest
Wed, Aug 19 - Wed, Aug 26
Delta Logo
12:00 pm - 12:58 am
ONT
-
BOS
9h 58m
1 stop
Delta Logo
4:20 pm - 10:14 pm
BOS
-
ONT
8h 54m
1 stop
$318Delta
Sat, Oct 10 - Tue, Oct 20
American Airlines Logo
7:00 am - 8:53 pm
ONT
-
BOS
10h 53m
1 stop
American Airlines Logo
6:20 am - 12:04 pm
BOS
-
ONT
8h 44m
1 stop
$328American Airlines
Sat, Jun 6 - Wed, Jun 10

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Sep 8
ONT7:13 pmOntario
9h 48m
1 stop
BOS8:01 amBoston Logan Intl
Sep 22
BOS2:03 pmBoston Logan Intl
9h 01m
1 stop
ONT8:04 pmOntario
$292
United Airlines
May 24
ONT6:30 amOntario
7h 59m
1 stop
BOS5:29 pmBoston Logan Intl
May 30
BOS9:50 amBoston Logan Intl
11h 06m
2 stops
ONT5:56 pmOntario
$335
United Airlines
Jun 18
ONT6:30 pmOntario
8h 28m
1 stop
BOS5:58 amBoston Logan Intl
Jun 23
BOS6:00 amBoston Logan Intl
9h 12m
1 stop
ONT12:12 pmOntario
$376

Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Jul 14
ONT2:50 pmOntario
6h 55m
1 stop
BOS12:45 amBoston Logan Intl
Jul 21
BOS5:25 amBoston Logan Intl
9h 40m
1 stop
ONT12:05 pmOntario
$303
Southwest
Jul 28
ONT9:40 pmOntario
7h 20m
1 stop
BOS8:00 amBoston Logan Intl
Aug 13
BOS5:00 pmBoston Logan Intl
8h 10m
1 stop
ONT10:10 pmOntario
$312
Southwest
Aug 19
ONT1:50 pmOntario
7h 15m
1 stop
BOS12:05 amBoston Logan Intl
Aug 26
BOS8:30 amBoston Logan Intl
13h 25m
1 stop
ONT6:55 pmOntario
$317

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 May 16, 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 9/8

7:13 pm-8:01 am

1 stop9h 48m

Boston Logan Intl

Tue 9/22

2:03 pm-8:04 pm

1 stop9h 01m

$292

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 5/28

1:29 pm-11:58 pm

1 stop7h 29m

Boston Logan Intl

Mon 6/1

6:10 am-12:19 pm

1 stop9h 09m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/29

7:12 pm-8:41 am

2 stops10h 29m

Boston Logan Intl

Sat 6/6

6:20 am-12:04 pm

1 stop8h 44m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/14

2:50 pm-12:45 am

1 stop6h 55m

Boston Logan Intl

Tue 7/21

5:25 am-12:05 pm

1 stop9h 40m

$303

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 5/28

7:12 pm-8:41 am

2 stops10h 29m

Boston Logan Intl

Tue 6/2

11:20 am-6:22 pm

2 stops10h 02m

$307

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 6/2

7:00 am-6:24 am

1 stop20h 24m

Boston Logan Intl

Fri 6/5

7:11 pm-11:10 am

1 stop18h 59m

$309
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/28

9:40 pm-8:00 am

1 stop7h 20m

Boston Logan Intl

Thu 8/13

5:00 pm-10:10 pm

1 stop8h 10m

$312

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 8/19

1:50 pm-12:05 am

1 stop7h 15m

Boston Logan Intl

Wed 8/26

8:30 am-6:55 pm

1 stop13h 25m

$317

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 10/10

12:00 pm-12:58 am

1 stop9h 58m

Boston Logan Intl

Tue 10/20

4:20 pm-10:14 pm

1 stop8h 54m

$318

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 6/6

7:00 am-8:53 pm

1 stop10h 53m

Boston Logan Intl

Wed 6/10

6:20 am-12:04 pm

1 stop8h 44m

$328

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 $397. 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 $490.

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 $363. 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 $456 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 May 2026, prices for Ontario to Boston flights are approximately 9% 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 15m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 15m
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 15m, 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
7.1
2,977 reviews
Search JetBlue flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,455 reviews
Search Delta flights
United AirlinesPriceFrom $242Free CancellationRating
7.4
9,727 reviews
Search United Airlines flights
American AirlinesPriceFrom $284Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
SouthwestPriceFrom $294Free CancellationRating
8.0
4,294 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 $242 round-trip, up to an average price of $417. 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
Cambridge
Plymouth
South Yarmouth
Gloucester
Narragansett
Falmouth
Brockton
Chatham
Warwick
Sturbridge
Laconia
Dennis Port
Nashua

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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