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Cheap flights from Ontario to Boston from $120

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
6:00 am - 4:39 pmONT  Ontario-BOS Boston Logan Intl
7h 39m1 stop Salt Lake City
Delta Logo
12:20 pm - 6:30 pmBOS  Boston Logan Intl-ONT Ontario
9h 10m1 stop Atlanta Hartsfield-Jackson
$332Delta
Tue, Sep 1 - Fri, Sep 4
Delta Logo
12:00 pm - 12:38 amONT  Ontario-BOS Boston Logan Intl
9h 38m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:20 pm - 8:05 pmBOS  Boston Logan Intl-ONT Ontario
10h 45m1 stop Atlanta Hartsfield-Jackson
$366Delta
Sat, Sep 5 - Thu, Sep 10
American Airlines Logo
10:29 am - 10:06 pmONT  Ontario-BOS Boston Logan Intl
8h 37m1 stop Dallas/Fort Worth
American Airlines Logo
6:02 am - 1:25 pmBOS  Boston Logan Intl-ONT Ontario
10h 23m1 stop Dallas/Fort Worth
$366American Airlines
Sun, Sep 6 - Sat, Sep 12
American Airlines Logo
12:37 pm - 11:34 pmONT  Ontario-BOS Boston Logan Intl
7h 57m1 stop Dallas/Fort Worth
American Airlines Logo
6:02 am - 1:25 pmBOS  Boston Logan Intl-ONT Ontario
10h 23m1 stop Dallas/Fort Worth
$367American Airlines
Fri, Sep 25 - Wed, Sep 30
United Airlines Logo
8:03 am - 8:57 pmONT  Ontario-BOS Boston Logan Intl
9h 54m1 stop San Francisco
United Airlines Logo
6:00 am - 12:18 pmBOS  Boston Logan Intl-ONT Ontario
9h 18m1 stop San Francisco
$367United Airlines
Sat, Oct 3 - Sun, Oct 4
United Airlines Logo
1:29 pm - 11:50 pmONT  Ontario-BOS Boston Logan Intl
7h 21m1 stop Denver Intl
United Airlines Logo
8:05 am - 3:33 pmBOS  Boston Logan Intl-ONT Ontario
10h 28m1 stop San Francisco
$367United Airlines
Fri, Nov 6 - Mon, Nov 9
Alaska Airlines Logo
6:02 am - 11:59 pmONT  Ontario-BOS Boston Logan Intl
14h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:40 pm - 10:17 amBOS  Boston Logan Intl-ONT Ontario
18h 37m1 stop Seattle/Tacoma Intl
$367Alaska Airlines
Sat, Oct 17 - Wed, Oct 21
Alaska Airlines Logo
6:02 am - 11:59 pmONT  Ontario-BOS Boston Logan Intl
14h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:13 am - 3:13 pmBOS  Boston Logan Intl-ONT Ontario
11h 00m1 stop Seattle/Tacoma Intl
$367Alaska Airlines
Tue, Oct 27 - Tue, Nov 3
Southwest Logo
2:00 pm - 12:35 amONT  Ontario-BOS Boston Logan Intl
7h 35m1 stop Denver Intl
Southwest Logo
5:25 am - 1:10 pmBOS  Boston Logan Intl-ONT Ontario
10h 45m2 stops Baltimore/Washington Sacramento Intl
$372Southwest
Fri, Sep 11 - Wed, Sep 16
Southwest Logo
8:40 am - 10:10 pmONT  Ontario-BOS Boston Logan Intl
10h 30m2 stops Phoenix Sky Harbor Intl Nashville Intl
Southwest Logo
9:00 am - 4:25 pmBOS  Boston Logan Intl-ONT Ontario
10h 25m1 stop Austin Bergstrom
$372Southwest
Wed, Nov 4 - Sat, Nov 7

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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 12
BOS9:33 amBoston Logan Intl
10h 45m
1 stop
ONT5:18 pmOntario
$384
Alaska Airlines
Sep 11
ONT3:14 pmOntario
13h 25m
1 stop
BOS7:39 amBoston Logan Intl
Sep 19
BOS7:59 pmBoston Logan Intl
18h 17m
1 stop
ONT11:16 amOntario
$390
Alaska Airlines
Sep 6
ONT10:47 amOntario
16h 22m
1 stop
BOS6:09 amBoston Logan Intl
Sep 12
BOS9:33 amBoston Logan Intl
10h 45m
1 stop
ONT5:18 pmOntario
$391

Delta flights from Ontario to Boston

Our best Delta deals on Ontario to Boston flight tickets
Delta
Sep 1
ONT6:00 amOntario
7h 39m
1 stop
BOS4:39 pmBoston Logan Intl
Sep 4
BOS12:20 pmBoston Logan Intl
9h 10m
1 stop
ONT6:30 pmOntario
$332
Delta
Sep 5
ONT12:00 pmOntario
9h 38m
1 stop
BOS12:38 amBoston Logan Intl
Sep 10
BOS12:20 pmBoston Logan Intl
10h 45m
1 stop
ONT8:05 pmOntario
$366
Delta
Sep 6
ONT6:17 amOntario
10h 26m
1 stop
BOS7:43 pmBoston Logan Intl
Sep 9
BOS3:10 pmBoston Logan Intl
8h 14m
1 stop
ONT8:24 pmOntario
$367

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to Boston that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 9/1

6:00 am-4:39 pm

1 stop7h 39m

Boston Logan Intl

Fri 9/4

12:20 pm-6:30 pm

1 stop9h 10m

$332

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sat 9/5

12:00 pm-12:38 am

1 stop9h 38m

Boston Logan Intl

Thu 9/10

12:20 pm-8:05 pm

1 stop10h 45m

$366

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sun 9/6

10:29 am-10:06 pm

1 stop8h 37m

Boston Logan Intl

Sat 9/12

6:02 am-1:25 pm

1 stop10h 23m

$366

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Fri 9/25

12:37 pm-11:34 pm

1 stop7h 57m

Boston Logan Intl

Wed 9/30

6:02 am-1:25 pm

1 stop10h 23m

$367

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sat 10/3

8:03 am-8:57 pm

1 stop9h 54m

Boston Logan Intl

Sun 10/4

6:00 am-12:18 pm

1 stop9h 18m

$367

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Fri 11/6

1:29 pm-11:50 pm

1 stop7h 21m

Boston Logan Intl

Mon 11/9

8:05 am-3:33 pm

1 stop10h 28m

$367

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sat 10/17

6:02 am-11:59 pm

1 stop14h 57m

Boston Logan Intl

Wed 10/21

6:40 pm-10:17 am

1 stop18h 37m

$367

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 10/27

6:02 am-11:59 pm

1 stop14h 57m

Boston Logan Intl

Tue 11/3

7:13 am-3:13 pm

1 stop11h 00m

$367

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Fri 9/11

2:00 pm-12:35 am

1 stop7h 35m

Boston Logan Intl

Wed 9/16

5:25 am-1:10 pm

2 stops10h 45m

$372

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 11/4

8:40 am-10:10 pm

2 stops10h 30m

Boston Logan Intl

Sat 11/7

9:00 am-4:25 pm

1 stop10h 25m

$372

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 $346 to $514.
The lowest price recently found on this route was $366.

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 $408. 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 $491.

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 $396. 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 $419 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 $378 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

Best Price Found

$120

Fastest flight time

6h 45m

Direct flights

None
The best one-way flight to Boston from Ontario in the past 72 hours is $120. The best round-trip flight deal from Ontario to Boston found on momondo in the last 72 hours is $332.
The fastest flight from Ontario to Boston takes 6h 45m
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 6h 45m, 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 $198Free CancellationRating
7.8
8,500 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.1
3,038 reviews
Search JetBlue flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,963 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,217 reviews
Search Southwest flights

  • United Airlines Flights From Ontario to Boston

    United Airlines is one of the most popular airlines flying from Ontario to Boston, operating 4 flights/week on average for this route. A good United Airlines flight deal for Ontario to Boston starts from $238 round-trip, up to an average price of $404. Our users have rated United Airlines at 7.4/10.

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
Laconia
Cambridge
Hampton
South Yarmouth
Plymouth
Revere
Middletown
Gloucester
Warwick
Kennebunkport
Everett
South Portland
Brockton
York Beach
Seekonk
Nashua

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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