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Cheap flights from Ontario to Boston from $147

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 8/4. 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.
Delta Logo
5:05 pm - 6:09 am
ONT
-
BOS
10h 04m
1 stop
Delta Logo
4:20 pm - 9:56 pm
BOS
-
ONT
8h 36m
1 stop
$297Delta
Tue, Sep 8 - Tue, Sep 22
Delta Logo
5:05 pm - 6:09 am
ONT
-
BOS
10h 04m
1 stop
Delta Logo
5:45 am - 11:04 am
BOS
-
ONT
8h 19m
1 stop
$303Delta
Sun, Sep 6 - Wed, Sep 9
Southwest Logo
2:20 pm - 12:35 am
ONT
-
BOS
7h 15m
1 stop
Southwest Logo
5:25 am - 12:05 pm
BOS
-
ONT
9h 40m
1 stop
$312Southwest
Sat, Jul 11 - Wed, Jul 15
Southwest Logo
9:40 pm - 8:00 am
ONT
-
BOS
7h 20m
1 stop
Southwest Logo
5:25 am - 1:50 pm
BOS
-
ONT
11h 25m
1 stop
$317Southwest
Tue, Jul 28 - Fri, Jul 31
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
Delta Logo
10:00 pm - 9:39 am
ONT
-
BOS
8h 39m
1 stop
Delta Logo
1:55 pm - 9:56 pm
BOS
-
ONT
11h 01m
1 stop
$328Delta
Mon, Aug 24 - Wed, Sep 16
Southwest Logo
2:00 pm - 12:30 am
ONT
-
BOS
7h 30m
1 stop
Southwest Logo
5:00 am - 2:30 pm
BOS
-
ONT
12h 30m
1 stop
$332Southwest
Fri, Aug 7 - Sat, Aug 15
American Airlines Logo
7:12 pm - 8:41 am
ONT
-
BOS
10h 29m
2 stops
American Airlines Logo
2:26 pm - 10:36 pm
BOS
-
ONT
11h 10m
1 stop
$333American Airlines
Mon, Jun 1 - Wed, Jun 3
Southwest Logo
11:30 am - 11:30 pm
ONT
-
BOS
9h 00m
1 stop
Southwest Logo
3:55 pm - 10:25 pm
BOS
-
ONT
9h 30m
1 stop
$334Southwest
Wed, Jul 22 - Thu, Jul 30
Delta Logo
11:56 am - 1:25 am
ONT
-
BOS
10h 29m
1 stop
Delta Logo
6:00 am - 12:29 pm
BOS
-
ONT
9h 29m
1 stop
$338Delta
Fri, Aug 21 - Thu, Sep 3

Delta flights from Ontario to Boston

Our best Delta deals on Ontario to Boston flight tickets
Delta
May 28
ONT6:00 amOntario
7h 44m
1 stop
BOS4:44 pmBoston Logan Intl
Jun 1
BOS6:10 amBoston Logan Intl
9h 09m
1 stop
ONT12:19 pmOntario
$297
Delta
Sep 6
ONT5:05 pmOntario
10h 04m
1 stop
BOS6:09 amBoston Logan Intl
Sep 9
BOS5:45 amBoston Logan Intl
8h 19m
1 stop
ONT11:04 amOntario
$303
Delta
Oct 10
ONT12:00 pmOntario
9h 58m
1 stop
BOS12:58 amBoston Logan Intl
Oct 20
BOS4:20 pmBoston Logan Intl
8h 54m
1 stop
ONT10:14 pmOntario
$318

American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
May 29
ONT7:12 pmOntario
10h 29m
2 stops
BOS8:41 amBoston Logan Intl
Jun 6
BOS8:01 amBoston Logan Intl
8h 27m
1 stop
ONT1:28 pmOntario
$302
American Airlines
May 29
ONT7:12 pmOntario
10h 29m
2 stops
BOS8:41 amBoston Logan Intl
Jun 6
BOS3:06 pmBoston Logan Intl
10h 33m
2 stops
ONT10:39 pmOntario
$307
American Airlines
May 29
ONT10:00 pmOntario
8h 22m
1 stop
BOS9:22 amBoston Logan Intl
Jun 6
BOS6:00 amBoston Logan Intl
10h 28m
1 stop
ONT1:28 pmOntario
$330

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 21, 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

5:05 pm-6:09 am

1 stop10h 04m

Boston Logan Intl

Tue 9/22

4:20 pm-9:56 pm

1 stop8h 36m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sun 9/6

5:05 pm-6:09 am

1 stop10h 04m

Boston Logan Intl

Wed 9/9

5:45 am-11:04 am

1 stop8h 19m

$303
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 7/11

2:20 pm-12:35 am

1 stop7h 15m

Boston Logan Intl

Wed 7/15

5:25 am-12:05 pm

1 stop9h 40m

$312

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 7/28

9:40 pm-8:00 am

1 stop7h 20m

Boston Logan Intl

Fri 7/31

5:25 am-1:50 pm

1 stop11h 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

Mon 8/24

10:00 pm-9:39 am

1 stop8h 39m

Boston Logan Intl

Wed 9/16

1:55 pm-9:56 pm

1 stop11h 01m

$328

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/7

2:00 pm-12:30 am

1 stop7h 30m

Boston Logan Intl

Sat 8/15

5:00 am-2:30 pm

1 stop12h 30m

$332

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 6/1

7:12 pm-8:41 am

2 stops10h 29m

Boston Logan Intl

Wed 6/3

2:26 pm-10:36 pm

1 stop11h 10m

$333

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 7/22

11:30 am-11:30 pm

1 stop9h 00m

Boston Logan Intl

Thu 7/30

3:55 pm-10:25 pm

1 stop9h 30m

$334

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/21

11:56 am-1:25 am

1 stop10h 29m

Boston Logan Intl

Thu 9/3

6:00 am-12:29 pm

1 stop9h 29m

$338

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 $400. 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 $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 $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 35m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 35m
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 35m, 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
2,981 reviews
Search JetBlue flights
DeltaPriceFrom $158Free CancellationRating
7.9
8,451 reviews
Search Delta flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
9,746 reviews
Search United Airlines flights
SouthwestPriceFrom $294Free CancellationRating
7.9
4,282 reviews
Search Southwest flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,639 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
Falmouth
Brockton
Warwick
Chatham
Sturbridge
Dennis Port
Laconia
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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