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Cheap flights from Ontario to Boston from $118

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 8/25. 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.
Delta Logo
1:06 pm - 11:57 pm
ONT
-
BOS
7h 51m
1 stop
Delta Logo
6:05 am - 12:16 pm
BOS
-
ONT
9h 11m
1 stop
$347Delta
Sat, Aug 22 - Sat, Aug 29
Delta Logo
7:05 am - 6:10 pm
ONT
-
BOS
8h 05m
1 stop
Delta Logo
6:05 am - 12:14 pm
BOS
-
ONT
9h 09m
1 stop
$347Delta
Wed, Sep 2 - Wed, Sep 9
American Airlines Logo
7:05 am - 7:42 pm
ONT
-
BOS
9h 37m
1 stop
American Airlines Logo
1:10 pm - 6:15 pm
BOS
-
ONT
8h 05m
1 stop
$347American Airlines
Tue, Sep 1 - Sat, Sep 5
American Airlines Logo
6:00 am - 7:43 pm
ONT
-
BOS
10h 43m
1 stop
American Airlines Logo
2:34 pm - 8:07 pm
BOS
-
ONT
8h 33m
1 stop
$347American Airlines
Tue, Sep 8 - Tue, Sep 15
United Airlines Logo
6:00 am - 5:29 pm
ONT
-
BOS
8h 29m
1 stop
United Airlines Logo
1:29 pm - 6:47 pm
BOS
-
ONT
8h 18m
1 stop
$347United Airlines
Tue, Oct 20 - Tue, Nov 17
Alaska Airlines Logo
10:47 am - 6:09 am
ONT
-
BOS
16h 22m
1 stop
Alaska Airlines Logo
7:59 pm - 11:16 am
BOS
-
ONT
18h 17m
1 stop
$347Alaska Airlines
Sat, Sep 12 - Tue, Sep 29
Alaska Airlines Logo
7:12 am - 6:09 am
ONT
-
BOS
19h 57m
1 stop
Alaska Airlines Logo
7:12 am - 2:16 pm
BOS
-
ONT
10h 04m
1 stop
$347Alaska Airlines
Mon, Sep 28 - Wed, Sep 30
Southwest Logo
8:40 pm - 9:55 am
ONT
-
BOS
10h 15m
2 stops
Southwest Logo
9:25 am - 2:25 pm
BOS
-
ONT
8h 00m
1 stop
$352Southwest
Mon, Sep 14 - Tue, Sep 22
Southwest Logo
10:25 am - 10:40 pm
ONT
-
BOS
9h 15m
2 stops
Southwest Logo
7:05 am - 2:10 pm
BOS
-
ONT
10h 05m
1 stop
$352Southwest
Wed, Oct 28 - Thu, Oct 29
United Airlines Logo
1:18 pm - 11:50 pm
ONT
-
BOS
7h 32m
1 stop
United Airlines Logo
12:27 pm - 8:53 pm
BOS
-
ONT
11h 26m
2 stops
$352United Airlines
Sat, Aug 29 - Sat, Sep 5

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Delta flights from Ontario to Boston

Our best Delta deals on Ontario to Boston flight tickets
Delta
Oct 30
ONT11:56 amOntario
9h 02m
1 stop
BOS11:58 pmBoston Logan Intl
Oct 31
BOS4:15 pmBoston Logan Intl
8h 57m
1 stop
ONT10:12 pmOntario
$357
Delta
Aug 24
ONT10:00 pmOntario
8h 39m
1 stop
BOS9:39 amBoston Logan Intl
Aug 28
BOS1:55 pmBoston Logan Intl
10h 57m
1 stop
ONT9:52 pmOntario
$367
Delta
Oct 17
ONT5:03 pmOntario
10h 27m
1 stop
BOS6:30 amBoston Logan Intl
Oct 21
BOS7:56 amBoston Logan Intl
12h 16m
1 stop
ONT5:12 pmOntario
$369

Alaska Airlines flights from Ontario to Boston

Our best Alaska Airlines deals on Ontario to Boston flight tickets
Alaska Airlines
Sep 11
ONT6:14 pmOntario
8h 55m
1 stop
BOS6:09 amBoston Logan Intl
Sep 14
BOS7:59 pmBoston Logan Intl
18h 17m
1 stop
ONT11:16 amOntario
$358
Alaska Airlines
Nov 17
ONT4:09 pmOntario
10h 32m
1 stop
BOS5:41 amBoston Logan Intl
Nov 18
BOS9:00 amBoston Logan Intl
10h 58m
1 stop
ONT4:58 pmOntario
$363
Alaska Airlines
Sep 25
ONT6:14 pmOntario
8h 55m
1 stop
BOS6:09 amBoston Logan Intl
Sep 30
BOS7:12 amBoston Logan Intl
10h 04m
1 stop
ONT2:16 pmOntario
$373

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 August 4, 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

Sat 8/22

1:06 pm-11:57 pm

1 stop7h 51m

Boston Logan Intl

Sat 8/29

6:05 am-12:16 pm

1 stop9h 11m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 9/2

7:05 am-6:10 pm

1 stop8h 05m

Boston Logan Intl

Wed 9/9

6:05 am-12:14 pm

1 stop9h 09m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/1

7:05 am-7:42 pm

1 stop9h 37m

Boston Logan Intl

Sat 9/5

1:10 pm-6:15 pm

1 stop8h 05m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 9/8

6:00 am-7:43 pm

1 stop10h 43m

Boston Logan Intl

Tue 9/15

2:34 pm-8:07 pm

1 stop8h 33m

$347
Quickest round-trip

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 10/20

6:00 am-5:29 pm

1 stop8h 29m

Boston Logan Intl

Tue 11/17

1:29 pm-6:47 pm

1 stop8h 18m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 9/12

10:47 am-6:09 am

1 stop16h 22m

Boston Logan Intl

Tue 9/29

7:59 pm-11:16 am

1 stop18h 17m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 9/28

7:12 am-6:09 am

1 stop19h 57m

Boston Logan Intl

Wed 9/30

7:12 am-2:16 pm

1 stop10h 04m

$347

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 9/14

8:40 pm-9:55 am

2 stops10h 15m

Boston Logan Intl

Tue 9/22

9:25 am-2:25 pm

1 stop8h 00m

$352

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Wed 10/28

10:25 am-10:40 pm

2 stops9h 15m

Boston Logan Intl

Thu 10/29

7:05 am-2:10 pm

1 stop10h 05m

$352

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 8/29

1:18 pm-11:50 pm

1 stop7h 32m

Boston Logan Intl

Sat 9/5

12:27 pm-8:53 pm

2 stops11h 26m

$352

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 typical for flights on this route.

Typical prices usually range from $344 to $514.
The lowest price recently found on this route was $347.

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 $406. 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 $392. 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 $412 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 August 2026, prices for Ontario to Boston flights are approximately 3% 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
DeltaPriceFrom $158Free CancellationRating
7.8
8,482 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.2
3,027 reviews
Search JetBlue flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
10,058 reviews
Search United Airlines flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,844 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,224 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
Ogunquit
Salem
Old Orchard Beach
Hampton
Laconia
Cambridge
South Yarmouth
Plymouth
Revere
Kennebunkport
York Beach
Gloucester
Warwick
Middletown
South Portland
Everett
Brockton
Falmouth
Seekonk

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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