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Cheap flights from Ontario to Boston from $153

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 9/1. 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.
United Airlines Logo
7:13 pm - 8:14 am
ONT
-
BOS
10h 01m
1 stop
United Airlines Logo
2:00 pm - 8:01 pm
BOS
-
ONT
9h 01m
1 stop
$332United Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
12:59 pm - 11:24 pm
ONT
-
BOS
7h 25m
1 stop
American Airlines Logo
6:30 am - 12:03 pm
BOS
-
ONT
8h 33m
1 stop
$337American Airlines
Tue, Aug 18 - Wed, Aug 26
Alaska Airlines Logo
4:09 pm - 5:41 am
ONT
-
BOS
10h 32m
1 stop
Alaska Airlines Logo
9:00 am - 4:58 pm
BOS
-
ONT
10h 58m
1 stop
$341Alaska Airlines
Tue, Nov 3 - Wed, Nov 4
Delta Logo
12:00 pm - 1:25 am
ONT
-
BOS
10h 25m
1 stop
Delta Logo
7:45 am - 5:21 pm
BOS
-
ONT
12h 36m
1 stop
$342Delta
Fri, Aug 14 - Tue, Aug 18
Delta Logo
12:00 pm - 1:25 am
ONT
-
BOS
10h 25m
1 stop
Delta Logo
5:30 am - 10:42 am
BOS
-
ONT
8h 12m
1 stop
$343Delta
Fri, Aug 14 - Thu, Aug 20
Alaska Airlines Logo
7:12 am - 6:09 am
ONT
-
BOS
19h 57m
1 stop
Alaska Airlines Logo
7:59 pm - 11:16 am
BOS
-
ONT
18h 17m
1 stop
$347Alaska Airlines
Fri, Sep 25 - Mon, Sep 28
Southwest Logo
11:55 pm - 2:25 pm
ONT
-
BOS
11h 30m
1 stop
Southwest Logo
1:05 pm - 8:45 pm
BOS
-
ONT
10h 40m
2 stops
$348Southwest
Wed, Oct 14 - Wed, Oct 21
American Airlines Logo
7:34 pm - 5:58 am
ONT
-
BOS
7h 24m
1 stop
American Airlines Logo
6:10 am - 1:30 pm
BOS
-
ONT
10h 20m
1 stop
$350American Airlines
Wed, Oct 7 - Wed, Oct 14
Southwest Logo
7:45 am - 9:20 pm
ONT
-
BOS
10h 35m
2 stops
Southwest Logo
5:40 am - 10:20 am
BOS
-
ONT
7h 40m
1 stop
$352Southwest
Tue, Sep 1 - Sat, Sep 5
United Airlines Logo
9:01 am - 9:02 pm
ONT
-
BOS
9h 01m
1 stop
United Airlines Logo
5:01 pm - 10:35 pm
BOS
-
ONT
8h 34m
1 stop
$353United Airlines
Thu, Aug 13 - Tue, Aug 18

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Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Oct 14
ONT11:55 pmOntario
11h 30m
1 stop
BOS2:25 pmBoston Logan Intl
Oct 21
BOS1:05 pmBoston Logan Intl
10h 40m
2 stops
ONT8:45 pmOntario
$348
Southwest
Sep 1
ONT7:45 amOntario
10h 35m
2 stops
BOS9:20 pmBoston Logan Intl
Sep 5
BOS5:40 amBoston Logan Intl
7h 40m
1 stop
ONT10:20 amOntario
$352
Southwest
Aug 14
ONT2:00 pmOntario
7h 30m
1 stop
BOS12:30 amBoston Logan Intl
Aug 18
BOS8:30 amBoston Logan Intl
13h 25m
1 stop
ONT6:55 pmOntario
$357

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Aug 20
ONT7:13 pmOntario
10h 01m
1 stop
BOS8:14 amBoston Logan Intl
Aug 25
BOS2:00 pmBoston Logan Intl
9h 01m
1 stop
ONT8:01 pmOntario
$332
United Airlines
Aug 13
ONT9:01 amOntario
9h 01m
1 stop
BOS9:02 pmBoston Logan Intl
Aug 18
BOS5:01 pmBoston Logan Intl
8h 34m
1 stop
ONT10:35 pmOntario
$353
United Airlines
Aug 14
ONT7:13 pmOntario
10h 01m
1 stop
BOS8:14 amBoston Logan Intl
Aug 18
BOS5:01 pmBoston Logan Intl
8h 34m
1 stop
ONT10:35 pmOntario
$354

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 July 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

Thu 8/20

7:13 pm-8:14 am

1 stop10h 01m

Boston Logan Intl

Tue 8/25

2:00 pm-8:01 pm

1 stop9h 01m

$332
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 8/18

12:59 pm-11:24 pm

1 stop7h 25m

Boston Logan Intl

Wed 8/26

6:30 am-12:03 pm

1 stop8h 33m

$337

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 11/3

4:09 pm-5:41 am

1 stop10h 32m

Boston Logan Intl

Wed 11/4

9:00 am-4:58 pm

1 stop10h 58m

$341

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/14

12:00 pm-1:25 am

1 stop10h 25m

Boston Logan Intl

Tue 8/18

7:45 am-5:21 pm

1 stop12h 36m

$342

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 8/14

12:00 pm-1:25 am

1 stop10h 25m

Boston Logan Intl

Thu 8/20

5:30 am-10:42 am

1 stop8h 12m

$343

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 9/25

7:12 am-6:09 am

1 stop19h 57m

Boston Logan Intl

Mon 9/28

7:59 pm-11:16 am

1 stop18h 17m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 10/14

11:55 pm-2:25 pm

1 stop11h 30m

Boston Logan Intl

Wed 10/21

1:05 pm-8:45 pm

2 stops10h 40m

$348

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 10/7

7:34 pm-5:58 am

1 stop7h 24m

Boston Logan Intl

Wed 10/14

6:10 am-1:30 pm

1 stop10h 20m

$350

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

7:45 am-9:20 pm

2 stops10h 35m

Boston Logan Intl

Sat 9/5

5:40 am-10:20 am

1 stop7h 40m

$352

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 8/13

9:01 am-9:02 pm

1 stop9h 01m

Boston Logan Intl

Tue 8/18

5:01 pm-10:35 pm

1 stop8h 34m

$353

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?

Prices are currently low for flights on this route.

Typical prices usually range from $375 to $570.
The lowest price recently found on this route was $332.

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 $338. 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 $405. 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 $493.

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 $390. 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 $467 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 $410 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 $366 on momondo.

How have Ontario to Boston flight prices changed over time?

As of July 2026, prices for Ontario to Boston flights are approximately 1% cheaper 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 25m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 25m
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 25m, 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
7.8
8,489 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.1
3,026 reviews
Search JetBlue flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
10,041 reviews
Search United Airlines flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,845 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,231 reviews
Search Southwest 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
Cambridge
Laconia
Plymouth
South Yarmouth
York Beach
Kennebunkport
Revere
Gloucester
Warwick
South Portland
Middletown
Brockton
Everett
Falmouth
Chatham

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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