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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 7/7. 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.
Delta Logo
12:00 pm - 1:06 am
ONT
-
BOS
10h 06m
1 stop
Delta Logo
6:05 am - 12:10 pm
BOS
-
ONT
9h 05m
1 stop
$297Delta
Tue, Sep 8 - Tue, Sep 22
American Airlines Logo
7:06 am - 9:05 pm
ONT
-
BOS
10h 59m
1 stop
American Airlines Logo
6:00 am - 1:25 pm
BOS
-
ONT
10h 25m
2 stops
$302American Airlines
Sun, Sep 6 - Wed, Sep 9
American Airlines Logo
8:01 pm - 8:46 am
ONT
-
BOS
9h 45m
2 stops
American Airlines Logo
6:00 am - 1:25 pm
BOS
-
ONT
10h 25m
2 stops
$307American Airlines
Sun, Sep 6 - Wed, Sep 9
Southwest Logo
7:40 am - 10:10 pm
ONT
-
BOS
11h 30m
1 stop
Southwest Logo
9:25 am - 2:25 pm
BOS
-
ONT
8h 00m
1 stop
$317Southwest
Wed, Aug 19 - Wed, Sep 2
Delta Logo
12:00 pm - 1:25 am
ONT
-
BOS
10h 25m
1 stop
Delta Logo
6:05 am - 12:10 pm
BOS
-
ONT
9h 05m
1 stop
$318Delta
Sat, Aug 29 - Fri, Sep 18
Southwest Logo
10:55 am - 12:05 am
ONT
-
BOS
10h 10m
1 stop
Southwest Logo
3:20 pm - 10:00 pm
BOS
-
ONT
9h 40m
2 stops
$323Southwest
Wed, Aug 19 - Wed, Aug 26
Southwest Logo
11:55 pm - 12:15 pm
ONT
-
BOS
9h 20m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$327Southwest
Tue, Jul 14 - Tue, Jul 21
American Airlines Logo
10:00 pm - 9:21 am
ONT
-
BOS
8h 21m
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 Logo
6:30 pm - 5:58 am
ONT
-
BOS
8h 28m
1 stop
United Airlines Logo
3:54 pm - 9:55 pm
BOS
-
ONT
9h 01m
1 stop
$332United Airlines
Thu, Jun 18 - Fri, Jun 19
Southwest Logo
7:45 am - 9:20 pm
ONT
-
BOS
10h 35m
2 stops
Southwest Logo
4:45 pm - 10:00 pm
BOS
-
ONT
8h 15m
1 stop
$333Southwest
Wed, Aug 12 - Tue, Aug 18

Delta flights from Ontario to Boston

Our best Delta deals on Ontario to Boston flight tickets
Delta
Sep 8
ONT12:00 pmOntario
10h 06m
1 stop
BOS1:06 amBoston Logan Intl
Sep 22
BOS6:05 amBoston Logan Intl
9h 05m
1 stop
ONT12:10 pmOntario
$297
Delta
Aug 29
ONT12:00 pmOntario
10h 25m
1 stop
BOS1:25 amBoston Logan Intl
Sep 18
BOS6:05 amBoston Logan Intl
9h 05m
1 stop
ONT12:10 pmOntario
$318
Delta
Aug 28
ONT5:05 pmOntario
10h 25m
1 stop
BOS6:30 amBoston Logan Intl
Sep 13
BOS6:00 amBoston Logan Intl
9h 29m
1 stop
ONT12:29 pmOntario
$338

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Jun 6
ONT5:45 amOntario
9h 04m
1 stop
BOS5:49 pmBoston Logan Intl
Jun 10
BOS6:00 amBoston Logan Intl
9h 12m
1 stop
ONT12:12 pmOntario
$297
United Airlines
Jun 18
ONT6:30 pmOntario
8h 28m
1 stop
BOS5:58 amBoston Logan Intl
Jun 19
BOS3:54 pmBoston Logan Intl
9h 01m
1 stop
ONT9:55 pmOntario
$332
United Airlines
Nov 5
ONT6:00 amOntario
8h 07m
1 stop
BOS5:07 pmBoston Logan Intl
Nov 11
BOS6:00 amBoston Logan Intl
9h 33m
2 stops
ONT12:33 pmOntario
$342

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 26, 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

12:00 pm-1:06 am

1 stop10h 06m

Boston Logan Intl

Tue 9/22

6:05 am-12:10 pm

1 stop9h 05m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 9/6

7:06 am-9:05 pm

1 stop10h 59m

Boston Logan Intl

Wed 9/9

6:00 am-1:25 pm

2 stops10h 25m

$302

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 9/6

8:01 pm-8:46 am

2 stops9h 45m

Boston Logan Intl

Wed 9/9

6:00 am-1:25 pm

2 stops10h 25m

$307

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 8/19

7:40 am-10:10 pm

1 stop11h 30m

Boston Logan Intl

Wed 9/2

9:25 am-2:25 pm

1 stop8h 00m

$317

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 8/29

12:00 pm-1:25 am

1 stop10h 25m

Boston Logan Intl

Fri 9/18

6:05 am-12:10 pm

1 stop9h 05m

$318

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 8/19

10:55 am-12:05 am

1 stop10h 10m

Boston Logan Intl

Wed 8/26

3:20 pm-10:00 pm

2 stops9h 40m

$323

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/14

11:55 pm-12:15 pm

1 stop9h 20m

Boston Logan Intl

Tue 7/21

5:25 am-12:05 pm

1 stop9h 40m

$327
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 6/6

10:00 pm-9:21 am

1 stop8h 21m

Boston Logan Intl

Wed 6/10

6:20 am-12:04 pm

1 stop8h 44m

$328

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 6/18

6:30 pm-5:58 am

1 stop8h 28m

Boston Logan Intl

Fri 6/19

3:54 pm-9:55 pm

1 stop9h 01m

$332

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 8/12

7:45 am-9:20 pm

2 stops10h 35m

Boston Logan Intl

Tue 8/18

4:45 pm-10:00 pm

1 stop8h 15m

$333

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 $497.

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 $370. 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 $458 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 $394 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 24m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 24m
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 24m, 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
8,424 reviews
Search Delta flights
JetBluePriceFrom $209Free CancellationRating
7.1
2,981 reviews
Search JetBlue flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
9,750 reviews
Search United Airlines flights
SouthwestPriceFrom $294Free CancellationRating
7.9
4,265 reviews
Search Southwest flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,632 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
Brockton
Falmouth
Warwick
Chatham
Sturbridge
Laconia
Dennis Port
Revere

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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