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Cheap flights from Ontario to Boston from $120

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
6:53 pm - 8:23 amONT  Ontario-BOS Boston Logan Intl
10h 30m1 stop San Francisco
United Airlines Logo
7:30 am - 12:33 pmBOS  Boston Logan Intl-ONT Ontario
8h 03m1 stop Denver Intl
$236United Airlines
Wed, Jan 6 - Tue, Jan 12
Southwest Logo
11:25 am - 10:10 pmONT  Ontario-BOS Boston Logan Intl
7h 45m1 stop Nashville Intl
Southwest Logo
12:50 pm - 6:15 pmBOS  Boston Logan Intl-ONT Ontario
8h 25m1 stop Chicago Midway
$240Southwest
Tue, Nov 17 - Wed, Nov 18
Southwest Logo
6:45 am - 4:35 pmONT  Ontario-BOS Boston Logan Intl
6h 50m1 stop Chicago Midway
Southwest Logo
5:05 am - 10:15 amBOS  Boston Logan Intl-ONT Ontario
8h 10m1 stop Denver Intl
$240Southwest
Wed, Jan 6 - Wed, Jan 13
American Airlines Logo
1:04 pm - 11:30 pmONT  Ontario-BOS Boston Logan Intl
7h 26m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:02 am - 11:47 amBOS  Boston Logan Intl-ONT Ontario
8h 45m1 stop Dallas/Fort Worth
$241American Airlines
Tue, Sep 15 - Sat, Sep 19
American Airlines Logo
6:27 am - 4:34 pmONT  Ontario-BOS Boston Logan Intl
7h 07m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
8:50 am - 4:07 pmBOS  Boston Logan Intl-ONT Ontario
10h 17m1 stop Phoenix Sky Harbor Intl
$241American Airlines
Thu, Jan 21 - Mon, Jan 25
United Airlines Logo
6:00 am - 5:29 pmONT  Ontario-BOS Boston Logan Intl
8h 29m1 stop Houston George Bush Intcntl
United Airlines Logo
6:00 am - 12:18 pmBOS  Boston Logan Intl-ONT Ontario
9h 18m1 stop San Francisco
$241United Airlines
Tue, Sep 15 - Thu, Sep 24
Delta Logo
5:03 pm - 6:30 amONT  Ontario-BOS Boston Logan Intl
10h 27m1 stop Salt Lake City
Delta Logo
6:45 pm - 11:58 pmBOS  Boston Logan Intl-ONT Ontario
8h 13m1 stop Salt Lake City
$297Delta
Sat, Oct 17 - Wed, Dec 2
Delta Logo
1:04 pm - 11:53 pmONT  Ontario-BOS Boston Logan Intl
7h 49m1 stop Salt Lake City
Delta Logo
3:47 pm - 10:43 pmBOS  Boston Logan Intl-ONT Ontario
9h 56m1 stop Seattle/Tacoma Intl
$297Delta
Tue, Sep 29 - Tue, Oct 6
Alaska Airlines Logo
4:09 pm - 5:40 amONT  Ontario-BOS Boston Logan Intl
10h 31m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:13 am - 3:13 pmBOS  Boston Logan Intl-ONT Ontario
11h 00m1 stop Seattle/Tacoma Intl
$347Alaska Airlines
Thu, Nov 12 - Mon, Nov 16
Alaska Airlines Logo
6:14 pm - 6:09 amONT  Ontario-BOS Boston Logan Intl
8h 55m1 stop Portland
Alaska Airlines Logo
7:12 am - 2:16 pmBOS  Boston Logan Intl-ONT Ontario
10h 04m1 stop Seattle/Tacoma Intl
$347Alaska Airlines
Mon, Sep 21 - Sat, Sep 26

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American Airlines flights from Ontario to Boston

Our best American Airlines deals on Ontario to Boston flight tickets
American Airlines
Oct 16
ONT7:34 pmOntario
7h 24m
1 stop
BOS5:58 amBoston Logan Intl
Oct 20
BOS8:45 amBoston Logan Intl
9h 31m
1 stop
ONT3:16 pmOntario
$288
American Airlines
Sep 22
ONT12:37 pmOntario
7h 57m
1 stop
BOS11:34 pmBoston Logan Intl
Oct 13
BOS5:17 amBoston Logan Intl
11h 13m
1 stop
ONT1:30 pmOntario
$303
American Airlines
Aug 29
ONT12:59 pmOntario
7h 25m
1 stop
BOS11:24 pmBoston Logan Intl
Aug 31
BOS6:30 amBoston Logan Intl
8h 33m
1 stop
ONT12:03 pmOntario
$352

Southwest flights from Ontario to Boston

Our best Southwest deals on Ontario to Boston flight tickets
Southwest
Oct 29
ONT12:40 pmOntario
9h 30m
1 stop
BOS1:10 amBoston Logan Intl
Nov 4
BOS5:00 amBoston Logan Intl
8h 10m
1 stop
ONT10:10 amOntario
$240
Southwest
Nov 17
ONT6:25 pmOntario
10h 55m
2 stops
BOS8:20 amBoston Logan Intl
Nov 18
BOS1:20 pmBoston Logan Intl
11h 20m
2 stops
ONT9:40 pmOntario
$251
Southwest
Sep 11
ONT2:00 pmOntario
7h 35m
1 stop
BOS12:35 amBoston Logan Intl
Sep 12
BOS6:00 amBoston Logan Intl
13h 30m
1 stop
ONT4:30 pmOntario
$278

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 14, 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 Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 1/6

6:53 pm-8:23 am

1 stop10h 30m

Boston Logan Intl

Tue 1/12

7:30 am-12:33 pm

1 stop8h 03m

$236

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 11/17

11:25 am-10:10 pm

1 stop7h 45m

Boston Logan Intl

Wed 11/18

12:50 pm-6:15 pm

1 stop8h 25m

$240
Quickest round-trip

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Wed 1/6

6:45 am-4:35 pm

1 stop6h 50m

Boston Logan Intl

Wed 1/13

5:05 am-10:15 am

1 stop8h 10m

$240

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 9/15

1:04 pm-11:30 pm

1 stop7h 26m

Boston Logan Intl

Sat 9/19

6:02 am-11:47 am

1 stop8h 45m

$241

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Thu 1/21

6:27 am-4:34 pm

1 stop7h 07m

Boston Logan Intl

Mon 1/25

8:50 am-4:07 pm

1 stop10h 17m

$241

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 9/15

6:00 am-5:29 pm

1 stop8h 29m

Boston Logan Intl

Thu 9/24

6:00 am-12:18 pm

1 stop9h 18m

$241

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Sat 10/17

5:03 pm-6:30 am

1 stop10h 27m

Boston Logan Intl

Wed 12/2

6:45 pm-11:58 pm

1 stop8h 13m

$297

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Tue 9/29

1:04 pm-11:53 pm

1 stop7h 49m

Boston Logan Intl

Tue 10/6

3:47 pm-10:43 pm

1 stop9h 56m

$297

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Thu 11/12

4:09 pm-5:40 am

1 stop10h 31m

Boston Logan Intl

Mon 11/16

7:13 am-3:13 pm

1 stop11h 00m

$347

OntarioBoston

ONT Ontario - BOS Boston Logan Intl

ONTBOS

Ontario

Mon 9/21

6:14 pm-6:09 am

1 stop8h 55m

Boston Logan Intl

Sat 9/26

7:12 am-2:16 pm

1 stop10h 04m

$347

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 $344 to $514.
The lowest price recently found on this route was $236.

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 $407. 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 $394. 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 $418 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 $384 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 26m

Direct flights

None
The fastest flight from Ontario to Boston takes 7h 26m
There are no direct flights from Ontario to Boston. There are no popular flight routes from Ontario to Boston.
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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 26m, 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 $189Free CancellationRating
7.8
8,502 reviews
Search Delta flights
JetBluePriceFrom $223Free CancellationRating
7.1
3,037 reviews
Search JetBlue flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
10,108 reviews
Search United Airlines flights
American AirlinesPriceFrom $296Free CancellationRating
7.1
11,927 reviews
Search American Airlines flights
SouthwestPriceFrom $302Free CancellationRating
8.0
4,220 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 3 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 $402. 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
Hampton
Cambridge
South Yarmouth
Plymouth
Revere
Middletown
Kennebunkport
Warwick
Gloucester
York Beach
Everett
South Portland
Brockton
Seekonk
Falmouth

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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