Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Boston from $99

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 2/24. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Boston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$248Alaska Airlines
Find Deal
Tue, Jan 27 - Tue, Feb 3
Alaska Airlines Logo
1:46 pm - 3:20 pmONT-BOS
22h 34m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$250Alaska Airlines
Find Deal
Mon, Feb 2 - Tue, Feb 10
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$251Alaska Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
American Airlines Logo
9:59 am - 10:19 pmONT-BOS
9h 20m2 stops
American Airlines Logo
8:50 am - 4:05 pmBOS-ONT
10h 15m1 stop
$256American Airlines
Find Deal
Thu, Jan 8 - Sun, Jan 11
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
4:36 pm - 11:52 pmBOS-ONT
10h 16m1 stop
$271Alaska Airlines
Find Deal
Tue, Feb 10 - Fri, Feb 20
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
4:36 pm - 11:52 pmBOS-ONT
10h 16m1 stop
$272Alaska Airlines
Find Deal
Tue, Feb 10 - Fri, Feb 20
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
4:36 pm - 11:52 pmBOS-ONT
10h 16m1 stop
$273Alaska Airlines
Find Deal
Tue, Feb 10 - Wed, Feb 18
Hawaiian Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Hawaiian Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$275Hawaiian Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14
United Airlines Logo
6:00 am - 6:48 pmONT-BOS
9h 48m2 stops
United Airlines Logo
3:32 pm - 9:49 pmBOS-ONT
9h 17m1 stop
$276United Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11
Alaska Airlines Logo
11:53 am - 11:54 pmONT-BOS
9h 01m1 stop
Alaska Airlines Logo
7:00 am - 3:08 pmBOS-ONT
11h 08m1 stop
$277Alaska Airlines
Find Deal
Thu, Jan 8 - Wed, Jan 14

Alaska Airlines flights from Ontario to Boston

Our best Alaska Airlines deals on Ontario to Boston flight tickets
Alaska Airlines
Jan 27
ONT11:53 amOntario
9h 01m
1 stop
BOS11:54 pmBoston Logan Intl
Feb 3
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$248
Find similar
Alaska Airlines
Feb 2
ONT1:46 pmOntario
22h 34m
1 stop
BOS3:20 pmBoston Logan Intl
Feb 10
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$250
Find similar
Alaska Airlines
Jan 8
ONT11:53 amOntario
9h 01m
1 stop
BOS11:54 pmBoston Logan Intl
Jan 14
BOS7:00 amBoston Logan Intl
11h 08m
1 stop
ONT3:08 pmOntario
$251
Find similar

United Airlines flights from Ontario to Boston

Our best United Airlines deals on Ontario to Boston flight tickets
United Airlines
Dec 8
ONT6:00 amOntario
8h 43m
1 stop
BOS5:43 pmBoston Logan Intl
Dec 11
BOS3:32 pmBoston Logan Intl
9h 17m
1 stop
ONT9:49 pmOntario
$271
Find similar
United Airlines
Dec 8
ONT6:00 amOntario
9h 48m
2 stops
BOS6:48 pmBoston Logan Intl
Dec 11
BOS3:32 pmBoston Logan Intl
9h 17m
1 stop
ONT9:49 pmOntario
$276
Find similar
United Airlines
Jan 12
ONT6:39 pmOntario
10h 31m
1 stop
BOS8:10 amBoston Logan Intl
Jan 16
BOS3:25 pmBoston Logan Intl
9h 33m
1 stop
ONT9:58 pmOntario
$285
Find similar

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 November 26, 2025.
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

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 1/27

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Tue 2/3

7:00 am-3:08 pm

1 stop11h 08m

$248

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 2/2

1:46 pm-3:20 pm

1 stop22h 34m

Boston Logan Intl

Tue 2/10

7:00 am-3:08 pm

1 stop11h 08m

$250

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

$251

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

9:59 am-10:19 pm

2 stops9h 20m

Boston Logan Intl

Sun 1/11

8:50 am-4:05 pm

1 stop10h 15m

$256

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/10

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Fri 2/20

4:36 pm-11:52 pm

1 stop10h 16m

$271

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/10

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Fri 2/20

4:36 pm-11:52 pm

1 stop10h 16m

$272

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/10

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 2/18

4:36 pm-11:52 pm

1 stop10h 16m

$273

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

$275

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 12/8

6:00 am-6:48 pm

2 stops9h 48m

Boston Logan Intl

Thu 12/11

3:32 pm-9:49 pm

1 stop9h 17m

$276

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 1/8

11:53 am-11:54 pm

1 stop9h 01m

Boston Logan Intl

Wed 1/14

7:00 am-3:08 pm

1 stop11h 08m

$277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 cheapest month to fly to Boston?

In general, September 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 $376. If you aren’t able to travel during the month of September, then book flights to Boston from Ontario during August instead. Flights to Boston in August, while not as cheap as those in September, still average around $378.

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 $393. 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 $495.

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 $352. 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 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 $420 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 November 2025, prices for Ontario to Boston flights are approximately 29% 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 02m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 02m
There are no direct flights from Ontario to Boston. There are no popular flight routes from Ontario to Boston.
Search flight deals

  • 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 02m, 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 $178Free CancellationRating
7.9
8,003 reviews
Search Delta flights
JetBluePriceFrom $237Free CancellationRating
7.2
2,905 reviews
Search JetBlue flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,050 reviews
Search United Airlines flights
American AirlinesPriceFrom $308Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
SouthwestPriceFrom $311Free CancellationRating
8.0
4,254 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
York Beach
Plymouth
Kennebunkport
South Yarmouth
Cambridge
Narragansett
Nashua
Gloucester
Falmouth
Laconia
Brockton
Concord
Everett
Sturbridge
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.

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 12/26
Fri 1/2
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States